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1
generate/database/cassandra/2025111700000001_notification_event.down.sql
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@ -1 +0,0 @@
DROP TYPE IF EXISTS notification_event;

15
generate/database/cassandra/2025111700000001_notification_event.up.sql
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@ -1,15 +0,0 @@
CREATE TABLE IF NOT EXISTS notification_event (
event_id uuid PRIMARY KEY, -- 事件 ID
event_type text, -- POST_PUBLISHED / COMMENT_ADDED / MENTIONED ...
actor_uid text, -- 觸發者 UID（例如 A）
object_type text, -- POST / COMMENT / USER ...
object_id text, -- 對應物件 ID（post_id 等）
title text, -- 顯示用標題
body text, -- 顯示用內容 / 摘要
payload text, -- JSON string（額外欄位，例如 {"postId": "..."}）
priority smallint, -- 1=critical, 2=high, 3=normal, 4=low
created_at timestamp -- 事件時間（方便做 cross table 查詢）
) AND comment = 'notification_event';

1
generate/database/cassandra/2025111700000002_user_notification.down.sql
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@ -1 +0,0 @@
DROP TYPE IF EXISTS user_notification;

11
generate/database/cassandra/2025111700000002_user_notification.up.sql
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@ -1,11 +0,0 @@
CREATE TABLE IF NOT EXISTS user_notification (
user_id text, -- 收通知的人
bucket text, -- 分桶，例如 '2025-11' 或 '2025-11-17'
ts timeuuid, -- 通知時間，用 now() 產生，排序用
event_id uuid, -- 對應 notification_event.event_id
status text, -- 'UNREAD' / 'READ' / 'ARCHIVED'
read_at timestamp, -- 已讀時間（非必填）
PRIMARY KEY ((user_id, bucket), ts)
) WITH CLUSTERING ORDER BY (ts DESC);

1
generate/database/cassandra/2025111700000003_notification_cursor.down.sql
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@ -1 +0,0 @@
DROP TYPE IF EXISTS notification_cursor;

5
generate/database/cassandra/2025111700000003_notification_cursor.up.sql
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@ -1,5 +0,0 @@
CREATE TABLE IF NOT EXISTS notification_cursor (
user_id text PRIMARY KEY,
last_seen_ts timeuuid, -- 最後看到的通知 timeuuid
updated_at timestamp
);

5
go.mod
View File

@ -10,7 +10,6 @@ require (
github.com/aws/aws-sdk-go-v2/credentials v1.18.21
github.com/aws/aws-sdk-go-v2/service/ses v1.34.9
github.com/go-playground/validator/v10 v10.28.0
github.com/gocql/gocql v1.7.0
github.com/golang-jwt/jwt/v4 v4.5.2
github.com/google/uuid v1.6.0
github.com/matcornic/hermes/v2 v2.1.0
@ -69,7 +68,6 @@ require (
github.com/grafana/pyroscope-go v1.2.7 // indirect
github.com/grafana/pyroscope-go/godeltaprof v0.1.9 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 // indirect
github.com/hailocab/go-hostpool v0.0.0-20160125115350-e80d13ce29ed // indirect
github.com/huandu/xstrings v1.2.0 // indirect
github.com/imdario/mergo v0.3.6 // indirect
github.com/jaytaylor/html2text v0.0.0-20180606194806-57d518f124b0 // indirect
@ -105,8 +103,6 @@ require (
github.com/redis/go-redis/v9 v9.14.0 // indirect
github.com/rivo/uniseg v0.2.0 // indirect
github.com/russross/blackfriday/v2 v2.0.1 // indirect
github.com/scylladb/go-reflectx v1.0.1 // indirect
github.com/scylladb/gocqlx/v2 v2.8.0 // indirect
github.com/shirou/gopsutil/v4 v4.25.6 // indirect
github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
github.com/sirupsen/logrus v1.9.3 // indirect
@ -143,7 +139,6 @@ require (
google.golang.org/genproto/googleapis/api v0.0.0-20250804133106-a7a43d27e69b // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20250804133106-a7a43d27e69b // indirect
gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
gopkg.in/inf.v0 v0.9.1 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

18
go.sum
View File

@ -36,10 +36,6 @@ github.com/aws/smithy-go v1.23.2 h1:Crv0eatJUQhaManss33hS5r40CG3ZFH+21XSkqMrIUM=
github.com/aws/smithy-go v1.23.2/go.mod h1:LEj2LM3rBRQJxPZTB4KuzZkaZYnZPnvgIhb4pu07mx0=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bitly/go-hostpool v0.0.0-20171023180738-a3a6125de932 h1:mXoPYz/Ul5HYEDvkta6I8/rnYM5gSdSV2tJ6XbZuEtY=
github.com/bitly/go-hostpool v0.0.0-20171023180738-a3a6125de932/go.mod h1:NOuUCSz6Q9T7+igc/hlvDOUdtWKryOrtFyIVABv/p7k=
github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 h1:DDGfHa7BWjL4YnC6+E63dPcxHo2sUxDIu8g3QgEJdRY=
github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869/go.mod h1:Ekp36dRnpXw/yCqJaO+ZrUyxD+3VXMFFr56k5XYrpB4=
github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
@ -97,13 +93,10 @@ github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJn
github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
github.com/go-playground/validator/v10 v10.28.0 h1:Q7ibns33JjyW48gHkuFT91qX48KG0ktULL6FgHdG688=
github.com/go-playground/validator/v10 v10.28.0/go.mod h1:GoI6I1SjPBh9p7ykNE/yj3fFYbyDOpwMn5KXd+m2hUU=
github.com/gocql/gocql v1.7.0 h1:O+7U7/1gSN7QTEAaMEsJc1Oq2QHXvCWoF3DFK9HDHus=
github.com/gocql/gocql v1.7.0/go.mod h1:vnlvXyFZeLBF0Wy+RS8hrOdbn0UWsWtdg07XJnFxZ+4=
github.com/golang-jwt/jwt/v4 v4.5.2 h1:YtQM7lnr8iZ+j5q71MGKkNw9Mn7AjHM68uc9g5fXeUI=
github.com/golang-jwt/jwt/v4 v4.5.2/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/golang/snappy v0.0.3/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/golang/snappy v1.0.0 h1:Oy607GVXHs7RtbggtPBnr2RmDArIsAefDwvrdWvRhGs=
github.com/golang/snappy v1.0.0/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@ -122,8 +115,6 @@ github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 h1:bkypFPDjIYGfCYD5mRBvpqxfYX1
github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0/go.mod h1:P+Lt/0by1T8bfcF3z737NnSbmxQAppXMRziHUxPOC8k=
github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 h1:2VTzZjLZBgl62/EtslCrtky5vbi9dd7HrQPQIx6wqiw=
github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542/go.mod h1:Ow0tF8D4Kplbc8s8sSb3V2oUCygFHVp8gC3Dn6U4MNI=
github.com/hailocab/go-hostpool v0.0.0-20160125115350-e80d13ce29ed h1:5upAirOpQc1Q53c0bnx2ufif5kANL7bfZWcc6VJWJd8=
github.com/hailocab/go-hostpool v0.0.0-20160125115350-e80d13ce29ed/go.mod h1:tMWxXQ9wFIaZeTI9F+hmhFiGpFmhOHzyShyFUhRm0H4=
github.com/huandu/xstrings v1.2.0 h1:yPeWdRnmynF7p+lLYz0H2tthW9lqhMJrQV/U7yy4wX0=
github.com/huandu/xstrings v1.2.0/go.mod h1:DvyZB1rfVYsBIigL8HwpZgxHwXozlTgGqn63UyNX5k4=
github.com/imdario/mergo v0.3.6 h1:xTNEAn+kxVO7dTZGu0CegyqKZmoWFI0rF8UxjlB2d28=
@ -219,12 +210,6 @@ github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR
github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
github.com/scylladb/go-reflectx v1.0.1 h1:b917wZM7189pZdlND9PbIJ6NQxfDPfBvUaQ7cjj1iZQ=
github.com/scylladb/go-reflectx v1.0.1/go.mod h1:rWnOfDIRWBGN0miMLIcoPt/Dhi2doCMZqwMCJ3KupFc=
github.com/scylladb/gocqlx/v2 v2.8.0 h1:f/oIgoEPjKDKd+RIoeHqexsIQVIbalVmT+axwvUqQUg=
github.com/scylladb/gocqlx/v2 v2.8.0/go.mod h1:4/+cga34PVqjhgSoo5Nr2fX1MQIqZB5eCE5DK4xeDig=
github.com/scylladb/gocqlx/v3 v3.0.4 h1:37rMVFEUlsGGNYB7OLR7991KwBYR2WA5TU7wtduClas=
github.com/scylladb/gocqlx/v3 v3.0.4/go.mod h1:3vBkGO+HRh/BYypLWXzurQ45u1BAO0VGBhg5VgperPY=
github.com/segmentio/ksuid v1.0.4 h1:sBo2BdShXjmcugAMwjugoGUdUV0pcxY5mW4xKRn3v4c=
github.com/segmentio/ksuid v1.0.4/go.mod h1:/XUiZBD3kVx5SmUOl55voK5yeAbBNNIed+2O73XgrPE=
github.com/shirou/gopsutil/v4 v4.25.6 h1:kLysI2JsKorfaFPcYmcJqbzROzsBWEOAtw6A7dIfqXs=
@ -245,7 +230,6 @@ github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpE
github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
@ -385,8 +369,6 @@ gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df h1:n7WqCuqOuCbNr617RXOY0AW
gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
gopkg.in/h2non/gock.v1 v1.1.2 h1:jBbHXgGBK/AoPVfJh5x4r/WxIrElvbLel8TCZkkZJoY=
gopkg.in/h2non/gock.v1 v1.1.2/go.mod h1:n7UGz/ckNChHiK05rDoiC4MYSunEC/lyaUm2WWaDva0=
gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=

758
pkg/library/cassandra/README.md
View File

@ -1,758 +0,0 @@
# Cassandra Client Library
一個基於 Go Generics 的 Cassandra 客戶端庫，提供類型安全的 Repository 模式和流暢的查詢構建器 API。
## 功能特色
- **類型安全**: 使用 Go Generics 提供編譯時類型檢查
- **Repository 模式**: 簡潔的 CRUD 操作介面
- **流暢查詢**: 鏈式查詢構建器，支援條件、排序、限制
- **分散式鎖**: 基於 Cassandra 的 IF NOT EXISTS 實現分散式鎖
- **批次操作**: 支援批次插入、更新、刪除
- **SAI 索引支援**: 完整的 SAI (Storage-Attached Indexing) 索引管理功能
- **Option 模式**: 靈活的配置選項
- **錯誤處理**: 統一的錯誤處理機制
- **高效能**: 內建連接池、重試機制、Prepared Statement 快取
## 安裝
```bash
go get github.com/scylladb/gocqlx/v2
go get github.com/gocql/gocql
```
## 快速開始
### 1. 定義資料模型
```go
package main
import (
"time"
"github.com/gocql/gocql"
"backend/pkg/library/cassandra"
)
// User 定義用戶資料模型
type User struct {
ID gocql.UUID `db:"id" partition_key:"true"`
Name string `db:"name"`
Email string `db:"email"`
Age int `db:"age"`
CreatedAt time.Time `db:"created_at"`
UpdatedAt time.Time `db:"updated_at"`
}
// TableName 實現 Table 介面
func (u User) TableName() string {
return "users"
}
```
### 2. 初始化資料庫連接
```go
package main
import (
"context"
"fmt"
"log"
"backend/pkg/library/cassandra"
"github.com/gocql/gocql"
)
func main() {
// 創建資料庫連接
db, err := cassandra.New(
cassandra.WithHosts("127.0.0.1"),
cassandra.WithPort(9042),
cassandra.WithKeyspace("my_keyspace"),
cassandra.WithAuth("username", "password"),
cassandra.WithConsistency(gocql.Quorum),
)
if err != nil {
log.Fatal(err)
}
defer db.Close()
// 創建 Repository
userRepo, err := cassandra.NewRepository[User](db, "my_keyspace")
if err != nil {
log.Fatal(err)
}
ctx := context.Background()
// 使用 Repository...
_ = userRepo
}
```
## 詳細範例
### CRUD 操作
#### 插入資料
```go
// 插入單筆資料
user := User{
ID: gocql.TimeUUID(),
Name: "Alice",
Email: "alice@example.com",
Age: 30,
CreatedAt: time.Now(),
UpdatedAt: time.Now(),
}
err := userRepo.Insert(ctx, user)
if err != nil {
log.Printf("插入失敗: %v", err)
}
// 批次插入
users := []User{
{ID: gocql.TimeUUID(), Name: "Bob", Email: "bob@example.com"},
{ID: gocql.TimeUUID(), Name: "Charlie", Email: "charlie@example.com"},
}
err = userRepo.InsertMany(ctx, users)
if err != nil {
log.Printf("批次插入失敗: %v", err)
}
```
#### 查詢資料
```go
// 根據主鍵查詢
userID := gocql.TimeUUID()
user, err := userRepo.Get(ctx, userID)
if err != nil {
if cassandra.IsNotFound(err) {
log.Println("用戶不存在")
} else {
log.Printf("查詢失敗: %v", err)
}
return
}
fmt.Printf("用戶: %+v\n", user)
```
#### 更新資料
```go
// 更新資料（只更新非零值欄位）
user.Name = "Alice Updated"
user.Email = "alice.updated@example.com"
err = userRepo.Update(ctx, user)
if err != nil {
log.Printf("更新失敗: %v", err)
}
// 更新所有欄位（包括零值）
user.Age = 0 // 零值也會被更新
err = userRepo.UpdateAll(ctx, user)
if err != nil {
log.Printf("更新失敗: %v", err)
}
```
#### 刪除資料
```go
// 刪除資料
err = userRepo.Delete(ctx, userID)
if err != nil {
log.Printf("刪除失敗: %v", err)
}
```
### 查詢構建器
#### 基本查詢
```go
// 查詢所有符合條件的記錄
var users []User
err := userRepo.Query().
Where(cassandra.Eq("age", 30)).
OrderBy("created_at", cassandra.DESC).
Limit(10).
Scan(ctx, &users)
if err != nil {
log.Printf("查詢失敗: %v", err)
}
// 查詢單筆記錄
user, err := userRepo.Query().
Where(cassandra.Eq("email", "alice@example.com")).
One(ctx)
if err != nil {
if cassandra.IsNotFound(err) {
log.Println("用戶不存在")
} else {
log.Printf("查詢失敗: %v", err)
}
}
```
#### 條件查詢
```go
// 等於條件
userRepo.Query().Where(cassandra.Eq("name", "Alice"))
// IN 條件
userRepo.Query().Where(cassandra.In("id", []any{id1, id2, id3}))
// 大於條件
userRepo.Query().Where(cassandra.Gt("age", 18))
// 小於條件
userRepo.Query().Where(cassandra.Lt("age", 65))
// 組合多個條件
userRepo.Query().
Where(cassandra.Eq("status", "active")).
Where(cassandra.Gt("age", 18))
```
#### 排序和限制
```go
// 按建立時間降序排列，限制 20 筆
var users []User
err := userRepo.Query().
OrderBy("created_at", cassandra.DESC).
Limit(20).
Scan(ctx, &users)
// 多欄位排序
err = userRepo.Query().
OrderBy("status", cassandra.ASC).
OrderBy("created_at", cassandra.DESC).
Scan(ctx, &users)
```
#### 選擇特定欄位
```go
// 只查詢特定欄位
var users []User
err := userRepo.Query().
Select("id", "name", "email").
Where(cassandra.Eq("status", "active")).
Scan(ctx, &users)
```
#### 計數查詢
```go
// 計算符合條件的記錄數
count, err := userRepo.Query().
Where(cassandra.Eq("status", "active")).
Count(ctx)
if err != nil {
log.Printf("計數失敗: %v", err)
} else {
fmt.Printf("活躍用戶數: %d\n", count)
}
```
### 分散式鎖
```go
// 獲取鎖（預設 30 秒 TTL）
lockUser := User{ID: userID}
err := userRepo.TryLock(ctx, lockUser)
if err != nil {
if cassandra.IsLockFailed(err) {
log.Println("獲取鎖失敗，資源已被鎖定")
} else {
log.Printf("鎖操作失敗: %v", err)
}
return
}
// 執行需要鎖定的操作
defer func() {
// 釋放鎖
if err := userRepo.UnLock(ctx, lockUser); err != nil {
log.Printf("釋放鎖失敗: %v", err)
}
}()
// 執行業務邏輯...
```
#### 自訂鎖 TTL
```go
// 設定鎖的 TTL 為 60 秒
err := userRepo.TryLock(ctx, lockUser, cassandra.WithLockTTL(60*time.Second))
// 永不自動解鎖
err := userRepo.TryLock(ctx, lockUser, cassandra.WithNoLockExpire())
```
### 複雜主鍵
#### 複合主鍵（Partition Key + Clustering Key）
```go
// 定義複合主鍵模型
type Order struct {
UserID gocql.UUID `db:"user_id" partition_key:"true"`
OrderID gocql.UUID `db:"order_id" clustering_key:"true"`
ProductID string `db:"product_id"`
Quantity int `db:"quantity"`
Price float64 `db:"price"`
CreatedAt time.Time `db:"created_at"`
}
func (o Order) TableName() string {
return "orders"
}
// 查詢時需要提供完整的主鍵
order, err := orderRepo.Get(ctx, Order{
UserID: userID,
OrderID: orderID,
})
```
#### 多欄位 Partition Key
```go
type Message struct {
ChatID gocql.UUID `db:"chat_id" partition_key:"true"`
MessageID gocql.UUID `db:"message_id" clustering_key:"true"`
UserID gocql.UUID `db:"user_id" partition_key:"true"`
Content string `db:"content"`
CreatedAt time.Time `db:"created_at"`
}
func (m Message) TableName() string {
return "messages"
}
// 查詢時需要提供所有 Partition Key
message, err := messageRepo.Get(ctx, Message{
ChatID: chatID,
UserID: userID,
MessageID: messageID,
})
```
## 配置選項
### 連接選項
```go
db, err := cassandra.New(
// 主機列表
cassandra.WithHosts("127.0.0.1", "127.0.0.2", "127.0.0.3"),
// 連接埠
cassandra.WithPort(9042),
// Keyspace
cassandra.WithKeyspace("my_keyspace"),
// 認證
cassandra.WithAuth("username", "password"),
// 一致性級別
cassandra.WithConsistency(gocql.Quorum),
// 連接超時
cassandra.WithConnectTimeout(10 * time.Second),
// 每個節點的連接數
cassandra.WithNumConns(10),
// 重試次數
cassandra.WithMaxRetries(3),
// 重試間隔
cassandra.WithRetryInterval(100*time.Millisecond, 1*time.Second),
// 重連間隔
cassandra.WithReconnectInterval(1*time.Second, 10*time.Second),
// CQL 版本
cassandra.WithCQLVersion("3.0.0"),
)
```
## 錯誤處理
### 錯誤類型
```go
// 檢查是否為特定錯誤
if cassandra.IsNotFound(err) {
// 記錄不存在
}
if cassandra.IsConflict(err) {
// 衝突錯誤（如唯一鍵衝突）
}
if cassandra.IsLockFailed(err) {
// 獲取鎖失敗
}
// 使用 errors.As 獲取詳細錯誤資訊
var cassandraErr *cassandra.Error
if errors.As(err, &cassandraErr) {
fmt.Printf("錯誤代碼: %s\n", cassandraErr.Code)
fmt.Printf("錯誤訊息: %s\n", cassandraErr.Message)
fmt.Printf("資料表: %s\n", cassandraErr.Table)
}
```
### 錯誤代碼
- `NOT_FOUND`: 記錄未找到
- `CONFLICT`: 衝突（如唯一鍵衝突、鎖獲取失敗）
- `INVALID_INPUT`: 輸入參數無效
- `MISSING_PARTITION_KEY`: 缺少 Partition Key
- `NO_FIELDS_TO_UPDATE`: 沒有欄位需要更新
- `MISSING_TABLE_NAME`: 缺少 TableName 方法
- `MISSING_WHERE_CONDITION`: 缺少 WHERE 條件
## 最佳實踐
### 1. 使用 Context
```go
// 所有操作都應該傳入 context，以便支援超時和取消
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
user, err := userRepo.Get(ctx, userID)
```
### 2. 錯誤處理
```go
user, err := userRepo.Get(ctx, userID)
if err != nil {
if cassandra.IsNotFound(err) {
// 處理不存在的情況
return nil, ErrUserNotFound
}
// 處理其他錯誤
return nil, fmt.Errorf("查詢用戶失敗: %w", err)
}
```
### 3. 批次操作
```go
// 對於大量資料，使用批次插入
const batchSize = 100
for i := 0; i < len(users); i += batchSize {
end := i + batchSize
if end > len(users) {
end = len(users)
}
err := userRepo.InsertMany(ctx, users[i:end])
if err != nil {
log.Printf("批次插入失敗 (索引 %d-%d): %v", i, end, err)
}
}
```
### 4. 使用分散式鎖
```go
// 在需要保證原子性的操作中使用鎖
err := userRepo.TryLock(ctx, lockUser, cassandra.WithLockTTL(30*time.Second))
if err != nil {
return fmt.Errorf("獲取鎖失敗: %w", err)
}
defer userRepo.UnLock(ctx, lockUser)
// 執行需要原子性的操作
```
### 5. 查詢優化
```go
// 只選擇需要的欄位
var users []User
err := userRepo.Query().
Select("id", "name", "email"). // 只選擇需要的欄位
Where(cassandra.Eq("status", "active")).
Scan(ctx, &users)
// 使用適當的限制
err = userRepo.Query().
Where(cassandra.Eq("status", "active")).
Limit(100). // 限制結果數量
Scan(ctx, &users)
```
## SAI 索引管理
### 建立 SAI 索引
```go
// 檢查是否支援 SAI
if !db.SaiSupported() {
log.Fatal("SAI is not supported in this Cassandra version")
}
// 建立標準索引
err := db.CreateSAIIndex(ctx, "my_keyspace", "users", "email", "users_email_idx", nil)
if err != nil {
log.Printf("建立索引失敗: %v", err)
}
// 建立全文索引（不區分大小寫）
opts := &cassandra.SAIIndexOptions{
IndexType: cassandra.SAIIndexTypeFullText,
IsAsync: false,
CaseSensitive: false,
}
err = db.CreateSAIIndex(ctx, "my_keyspace", "posts", "content", "posts_content_ft_idx", opts)
```
### 查詢 SAI 索引
```go
// 列出資料表的所有 SAI 索引
indexes, err := db.ListSAIIndexes(ctx, "my_keyspace", "users")
if err != nil {
log.Printf("查詢索引失敗: %v", err)
} else {
for _, idx := range indexes {
fmt.Printf("索引: %s, 欄位: %s, 類型: %s\n", idx.Name, idx.Column, idx.Type)
}
}
// 檢查索引是否存在
exists, err := db.CheckSAIIndexExists(ctx, "my_keyspace", "users_email_idx")
if err != nil {
log.Printf("檢查索引失敗: %v", err)
} else if exists {
fmt.Println("索引存在")
}
```
### 刪除 SAI 索引
```go
// 刪除索引
err := db.DropSAIIndex(ctx, "my_keyspace", "users_email_idx")
if err != nil {
log.Printf("刪除索引失敗: %v", err)
}
```
### SAI 索引類型
- **SAIIndexTypeStandard**: 標準索引（等於查詢）
- **SAIIndexTypeCollection**: 集合索引（用於 list、set、map）
- **SAIIndexTypeFullText**: 全文索引
### SAI 索引選項
```go
opts := &cassandra.SAIIndexOptions{
IndexType: cassandra.SAIIndexTypeFullText, // 索引類型
IsAsync: false, // 是否異步建立
CaseSensitive: true, // 是否區分大小寫
}
```
## 注意事項
### 1. 主鍵要求
- `Get` 和 `Delete` 操作必須提供完整的主鍵（所有 Partition Key 和 Clustering Key）
- 單一主鍵值只適用於單一 Partition Key 且無 Clustering Key 的情況
### 2. 更新操作
- `Update` 只更新非零值欄位
- `UpdateAll` 更新所有欄位（包括零值）
- 更新操作必須包含主鍵欄位
### 3. 查詢限制
- Cassandra 的查詢必須包含所有 Partition Key
- 排序只能按 Clustering Key 進行
- 不支援 JOIN 操作
### 4. 分散式鎖
- 鎖使用 IF NOT EXISTS 實現，預設 30 秒 TTL
- 獲取鎖失敗時會返回 `CONFLICT` 錯誤
- 釋放鎖時會自動重試，最多 3 次
### 5. 批次操作
- 批次操作有大小限制（建議不超過 1000 筆）
- 批次操作中的所有操作必須屬於同一個 Partition Key
### 6. SAI 索引
- SAI 索引需要 Cassandra 4.0.9+ 版本（建議 5.0+）
- 建立索引前請先檢查 `db.SaiSupported()`
- 索引建立是異步操作，可能需要一些時間
- 刪除索引時使用 `IF EXISTS`，避免索引不存在時報錯
- 使用 SAI 索引可以大幅提升非主鍵欄位的查詢效能
- 全文索引支援不區分大小寫的搜尋
## 完整範例
```go
package main
import (
"context"
"fmt"
"log"
"time"
"backend/pkg/library/cassandra"
"github.com/gocql/gocql"
)
type User struct {
ID gocql.UUID `db:"id" partition_key:"true"`
Name string `db:"name"`
Email string `db:"email"`
Age int `db:"age"`
Status string `db:"status"`
CreatedAt time.Time `db:"created_at"`
UpdatedAt time.Time `db:"updated_at"`
}
func (u User) TableName() string {
return "users"
}
func main() {
// 初始化資料庫連接
db, err := cassandra.New(
cassandra.WithHosts("127.0.0.1"),
cassandra.WithPort(9042),
cassandra.WithKeyspace("my_keyspace"),
)
if err != nil {
log.Fatal(err)
}
defer db.Close()
// 創建 Repository
userRepo, err := cassandra.NewRepository[User](db, "my_keyspace")
if err != nil {
log.Fatal(err)
}
ctx := context.Background()
// 插入用戶
user := User{
ID: gocql.TimeUUID(),
Name: "Alice",
Email: "alice@example.com",
Age: 30,
Status: "active",
CreatedAt: time.Now(),
UpdatedAt: time.Now(),
}
if err := userRepo.Insert(ctx, user); err != nil {
log.Printf("插入失敗: %v", err)
return
}
// 查詢用戶
foundUser, err := userRepo.Get(ctx, user.ID)
if err != nil {
log.Printf("查詢失敗: %v", err)
return
}
fmt.Printf("查詢到的用戶: %+v\n", foundUser)
// 更新用戶
user.Name = "Alice Updated"
user.Email = "alice.updated@example.com"
if err := userRepo.Update(ctx, user); err != nil {
log.Printf("更新失敗: %v", err)
return
}
// 查詢活躍用戶
var activeUsers []User
if err := userRepo.Query().
Where(cassandra.Eq("status", "active")).
OrderBy("created_at", cassandra.DESC).
Limit(10).
Scan(ctx, &activeUsers); err != nil {
log.Printf("查詢失敗: %v", err)
return
}
fmt.Printf("活躍用戶數: %d\n", len(activeUsers))
// 使用分散式鎖
if err := userRepo.TryLock(ctx, user, cassandra.WithLockTTL(30*time.Second)); err != nil {
if cassandra.IsLockFailed(err) {
log.Println("獲取鎖失敗")
} else {
log.Printf("鎖操作失敗: %v", err)
}
return
}
defer userRepo.UnLock(ctx, user)
// 執行需要鎖定的操作
fmt.Println("執行需要鎖定的操作...")
// 刪除用戶
if err := userRepo.Delete(ctx, user.ID); err != nil {
log.Printf("刪除失敗: %v", err)
return
}
fmt.Println("操作完成")
}
```
## 測試
套件包含完整的測試覆蓋，包括：
- 單元測試（table-driven tests）
- 集成測試（使用 testcontainers）
運行測試：
```bash
go test ./pkg/library/cassandra/...
```
查看測試覆蓋率：
```bash
go test ./pkg/library/cassandra/... -cover
```
## 授權
本專案遵循專案的主要授權協議。

27
pkg/library/cassandra/const.go
View File

@ -1,27 +0,0 @@
package cassandra
import (
"time"
"github.com/gocql/gocql"
)
// 預設設定常數
const (
defaultNumConns = 10 // 預設每個節點的連線數量
defaultTimeoutSec = 10 // 預設連線逾時秒數
defaultMaxRetries = 3 // 預設重試次數
defaultPort = 9042
defaultConsistency = gocql.Quorum
defaultRetryMinInterval = 1 * time.Second
defaultRetryMaxInterval = 30 * time.Second
defaultReconnectInitialInterval = 1 * time.Second
defaultReconnectMaxInterval = 60 * time.Second
defaultCqlVersion = "3.0.0"
)
const (
DBFiledName = "db"
Pk = "partition_key"
ClusterKey = "clustering_key"
)

158
pkg/library/cassandra/db.go
View File

@ -1,158 +0,0 @@
package cassandra
import (
"context"
"fmt"
"strconv"
"strings"
"time"
"github.com/gocql/gocql"
"github.com/scylladb/gocqlx/v2"
)
// DB 是 Cassandra 的核心資料庫連接
type DB struct {
session gocqlx.Session
defaultKeyspace string
version string
saiSupported bool
}
// New 創建新的 DB 實例
func New(opts ...Option) (*DB, error) {
cfg := defaultConfig()
for _, opt := range opts {
opt(cfg)
}
if len(cfg.Hosts) == 0 {
return nil, fmt.Errorf("at least one host is required")
}
// 建立連線設定
cluster := gocql.NewCluster(cfg.Hosts...)
cluster.Port = cfg.Port
cluster.Consistency = cfg.Consistency
cluster.Timeout = time.Duration(cfg.ConnectTimeoutSec) * time.Second
cluster.NumConns = cfg.NumConns
cluster.RetryPolicy = &gocql.ExponentialBackoffRetryPolicy{
NumRetries: cfg.MaxRetries,
Min: cfg.RetryMinInterval,
Max: cfg.RetryMaxInterval,
}
cluster.ReconnectionPolicy = &gocql.ExponentialReconnectionPolicy{
MaxRetries: cfg.MaxRetries,
InitialInterval: cfg.ReconnectInitialInterval,
MaxInterval: cfg.ReconnectMaxInterval,
}
// 若有提供 Keyspace 則指定
if cfg.Keyspace != "" {
cluster.Keyspace = cfg.Keyspace
}
// 若啟用驗證則設定帳號密碼
if cfg.UseAuth {
cluster.Authenticator = gocql.PasswordAuthenticator{
Username: cfg.Username,
Password: cfg.Password,
}
}
// 建立 Session
session, err := gocqlx.WrapSession(cluster.CreateSession())
if err != nil {
return nil, fmt.Errorf("failed to connect to Cassandra cluster (hosts: %v, port: %d): %w", cfg.Hosts, cfg.Port, err)
}
db := &DB{
session: session,
defaultKeyspace: cfg.Keyspace,
}
// 初始化版本資訊
version, err := db.getVersion(context.Background())
if err != nil {
return nil, fmt.Errorf("failed to get DB version: %w", err)
}
db.version = version
db.saiSupported = isSAISupported(version)
return db, nil
}
// Close 關閉資料庫連線
func (db *DB) Close() {
db.session.Close()
}
// GetSession 返回底層的 gocqlx Session（用於進階操作）
func (db *DB) GetSession() gocqlx.Session {
return db.session
}
// GetDefaultKeyspace 返回預設的 keyspace
func (db *DB) GetDefaultKeyspace() string {
return db.defaultKeyspace
}
// Version 返回資料庫版本
func (db *DB) Version() string {
return db.version
}
// SaiSupported 返回是否支援 SAI
func (db *DB) SaiSupported() bool {
return db.saiSupported
}
// getVersion 獲取資料庫版本
func (db *DB) getVersion(ctx context.Context) (string, error) {
var version string
stmt := "SELECT release_version FROM system.local"
err := db.session.Query(stmt, []string{"release_version"}).
WithContext(ctx).
Consistency(gocql.One).
Scan(&version)
return version, err
}
// isSAISupported 檢查版本是否支援 SAI
func isSAISupported(version string) bool {
// 只要 major >=5 就支援
// 4.0.9+ 才有 SAI，但不穩，強烈建議 5.0+
parts := strings.Split(version, ".")
if len(parts) < 2 {
return false
}
major, _ := strconv.Atoi(parts[0])
minor, _ := strconv.Atoi(parts[1])
if major >= 5 {
return true
}
if major == 4 {
if minor > 0 { // 4.1.x、4.2.x 直接支援
return true
}
if minor == 0 {
patch := 0
if len(parts) >= 3 {
patch, _ = strconv.Atoi(parts[2])
}
if patch >= 9 {
return true
}
}
}
return false
}
// withContextAndTimestamp 為查詢添加 context 和時間戳
func (db *DB) withContextAndTimestamp(ctx context.Context, q *gocqlx.Queryx) *gocqlx.Queryx {
return q.WithContext(ctx).WithTimestamp(time.Now().UnixNano() / 1e3)
}

545
pkg/library/cassandra/db_test.go
View File

@ -1,545 +0,0 @@
package cassandra
import (
"errors"
"testing"
"time"
"github.com/gocql/gocql"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestIsSAISupported(t *testing.T) {
tests := []struct {
name string
version string
expected bool
}{
{
name: "version 5.0.0 should support SAI",
version: "5.0.0",
expected: true,
},
{
name: "version 5.1.0 should support SAI",
version: "5.1.0",
expected: true,
},
{
name: "version 6.0.0 should support SAI",
version: "6.0.0",
expected: true,
},
{
name: "version 4.1.0 should support SAI",
version: "4.1.0",
expected: true,
},
{
name: "version 4.2.0 should support SAI",
version: "4.2.0",
expected: true,
},
{
name: "version 4.0.9 should support SAI",
version: "4.0.9",
expected: true,
},
{
name: "version 4.0.10 should support SAI",
version: "4.0.10",
expected: true,
},
{
name: "version 4.0.8 should not support SAI",
version: "4.0.8",
expected: false,
},
{
name: "version 4.0.0 should not support SAI",
version: "4.0.0",
expected: false,
},
{
name: "version 3.11.0 should not support SAI",
version: "3.11.0",
expected: false,
},
{
name: "invalid version format should not support SAI",
version: "invalid",
expected: false,
},
{
name: "empty version should not support SAI",
version: "",
expected: false,
},
{
name: "version with only major should not support SAI",
version: "5",
expected: false,
},
{
name: "version 4.0.9 with extra parts should support SAI",
version: "4.0.9.1",
expected: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := isSAISupported(tt.version)
assert.Equal(t, tt.expected, result, "version %s should have SAI support = %v", tt.version, tt.expected)
})
}
}
func TestNew_Validation(t *testing.T) {
tests := []struct {
name string
opts []Option
wantErr bool
errMsg string
}{
{
name: "no hosts should return error",
opts: []Option{},
wantErr: true,
errMsg: "at least one host is required",
},
{
name: "empty hosts should return error",
opts: []Option{WithHosts()},
wantErr: true,
errMsg: "at least one host is required",
},
{
name: "valid hosts should not return error on validation",
opts: []Option{
WithHosts("localhost"),
},
wantErr: false,
},
{
name: "multiple hosts should not return error on validation",
opts: []Option{
WithHosts("localhost", "127.0.0.1"),
},
wantErr: false,
},
{
name: "with keyspace should not return error on validation",
opts: []Option{
WithHosts("localhost"),
WithKeyspace("test_keyspace"),
},
wantErr: false,
},
{
name: "with port should not return error on validation",
opts: []Option{
WithHosts("localhost"),
WithPort(9042),
},
wantErr: false,
},
{
name: "with auth should not return error on validation",
opts: []Option{
WithHosts("localhost"),
WithAuth("user", "pass"),
},
wantErr: false,
},
{
name: "with all options should not return error on validation",
opts: []Option{
WithHosts("localhost"),
WithKeyspace("test_keyspace"),
WithPort(9042),
WithAuth("user", "pass"),
WithConsistency(gocql.Quorum),
WithConnectTimeoutSec(10),
WithNumConns(10),
WithMaxRetries(3),
},
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
db, err := New(tt.opts...)
if tt.wantErr {
require.Error(t, err)
if tt.errMsg != "" {
assert.Contains(t, err.Error(), tt.errMsg)
}
assert.Nil(t, db)
} else {
// 注意：這裡可能會因為無法連接到真實的 Cassandra 而失敗
// 但至少驗證了配置驗證邏輯
if err != nil {
// 如果錯誤不是驗證錯誤，而是連接錯誤，這是可以接受的
assert.NotContains(t, err.Error(), "at least one host is required")
}
}
})
}
}
func TestDB_GetDefaultKeyspace(t *testing.T) {
tests := []struct {
name string
keyspace string
expectedResult string
}{
{
name: "empty keyspace should return empty string",
keyspace: "",
expectedResult: "",
},
{
name: "non-empty keyspace should return keyspace",
keyspace: "test_keyspace",
expectedResult: "test_keyspace",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，可能需要 mock 或使用 testcontainers
// 這裡只是展示測試結構
_ = tt
})
}
}
func TestDB_Version(t *testing.T) {
tests := []struct {
name string
version string
expected string
}{
{
name: "version 5.0.0",
version: "5.0.0",
expected: "5.0.0",
},
{
name: "version 4.0.9",
version: "4.0.9",
expected: "4.0.9",
},
{
name: "version 3.11.0",
version: "3.11.0",
expected: "3.11.0",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，可能需要 mock 或使用 testcontainers
_ = tt
})
}
}
func TestDB_SaiSupported(t *testing.T) {
tests := []struct {
name string
version string
expected bool
}{
{
name: "version 5.0.0 should support SAI",
version: "5.0.0",
expected: true,
},
{
name: "version 4.0.9 should support SAI",
version: "4.0.9",
expected: true,
},
{
name: "version 4.0.8 should not support SAI",
version: "4.0.8",
expected: false,
},
{
name: "version 3.11.0 should not support SAI",
version: "3.11.0",
expected: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，可能需要 mock 或使用 testcontainers
// 這裡只是展示測試結構
_ = tt
})
}
}
func TestDB_GetSession(t *testing.T) {
t.Run("GetSession should return non-nil session", func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，可能需要 mock 或使用 testcontainers
})
}
func TestDB_Close(t *testing.T) {
t.Run("Close should not panic", func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，可能需要 mock 或使用 testcontainers
})
}
func TestDB_getVersion(t *testing.T) {
tests := []struct {
name string
version string
queryErr error
wantErr bool
expectedVer string
}{
{
name: "successful version query",
version: "5.0.0",
queryErr: nil,
wantErr: false,
expectedVer: "5.0.0",
},
{
name: "query error should return error",
version: "",
queryErr: errors.New("connection failed"),
wantErr: true,
expectedVer: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestDB_withContextAndTimestamp(t *testing.T) {
t.Run("withContextAndTimestamp should add context and timestamp", func(t *testing.T) {
// 注意：這需要 mock query
// 在實際測試中，需要使用 mock
})
}
func TestDefaultConfig(t *testing.T) {
t.Run("defaultConfig should return valid config", func(t *testing.T) {
cfg := defaultConfig()
require.NotNil(t, cfg)
assert.Equal(t, defaultPort, cfg.Port)
assert.Equal(t, defaultConsistency, cfg.Consistency)
assert.Equal(t, defaultTimeoutSec, cfg.ConnectTimeoutSec)
assert.Equal(t, defaultNumConns, cfg.NumConns)
assert.Equal(t, defaultMaxRetries, cfg.MaxRetries)
assert.Equal(t, defaultRetryMinInterval, cfg.RetryMinInterval)
assert.Equal(t, defaultRetryMaxInterval, cfg.RetryMaxInterval)
assert.Equal(t, defaultReconnectInitialInterval, cfg.ReconnectInitialInterval)
assert.Equal(t, defaultReconnectMaxInterval, cfg.ReconnectMaxInterval)
assert.Equal(t, defaultCqlVersion, cfg.CQLVersion)
})
}
func TestOptionFunctions(t *testing.T) {
tests := []struct {
name string
opt Option
validateConfig func(*testing.T, *config)
}{
{
name: "WithHosts should set hosts",
opt: WithHosts("host1", "host2"),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, []string{"host1", "host2"}, c.Hosts)
},
},
{
name: "WithPort should set port",
opt: WithPort(9999),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 9999, c.Port)
},
},
{
name: "WithKeyspace should set keyspace",
opt: WithKeyspace("test_keyspace"),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, "test_keyspace", c.Keyspace)
},
},
{
name: "WithAuth should set auth and enable UseAuth",
opt: WithAuth("user", "pass"),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, "user", c.Username)
assert.Equal(t, "pass", c.Password)
assert.True(t, c.UseAuth)
},
},
{
name: "WithConsistency should set consistency",
opt: WithConsistency(gocql.One),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, gocql.One, c.Consistency)
},
},
{
name: "WithConnectTimeoutSec should set timeout",
opt: WithConnectTimeoutSec(20),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 20, c.ConnectTimeoutSec)
},
},
{
name: "WithConnectTimeoutSec with zero should use default",
opt: WithConnectTimeoutSec(0),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultTimeoutSec, c.ConnectTimeoutSec)
},
},
{
name: "WithNumConns should set numConns",
opt: WithNumConns(20),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 20, c.NumConns)
},
},
{
name: "WithNumConns with zero should use default",
opt: WithNumConns(0),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultNumConns, c.NumConns)
},
},
{
name: "WithMaxRetries should set maxRetries",
opt: WithMaxRetries(5),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 5, c.MaxRetries)
},
},
{
name: "WithMaxRetries with zero should use default",
opt: WithMaxRetries(0),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultMaxRetries, c.MaxRetries)
},
},
{
name: "WithRetryMinInterval should set retryMinInterval",
opt: WithRetryMinInterval(2 * time.Second),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 2*time.Second, c.RetryMinInterval)
},
},
{
name: "WithRetryMinInterval with zero should use default",
opt: WithRetryMinInterval(0),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultRetryMinInterval, c.RetryMinInterval)
},
},
{
name: "WithRetryMaxInterval should set retryMaxInterval",
opt: WithRetryMaxInterval(60 * time.Second),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 60*time.Second, c.RetryMaxInterval)
},
},
{
name: "WithRetryMaxInterval with zero should use default",
opt: WithRetryMaxInterval(0),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultRetryMaxInterval, c.RetryMaxInterval)
},
},
{
name: "WithReconnectInitialInterval should set reconnectInitialInterval",
opt: WithReconnectInitialInterval(2 * time.Second),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 2*time.Second, c.ReconnectInitialInterval)
},
},
{
name: "WithReconnectInitialInterval with zero should use default",
opt: WithReconnectInitialInterval(0),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultReconnectInitialInterval, c.ReconnectInitialInterval)
},
},
{
name: "WithReconnectMaxInterval should set reconnectMaxInterval",
opt: WithReconnectMaxInterval(120 * time.Second),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, 120*time.Second, c.ReconnectMaxInterval)
},
},
{
name: "WithReconnectMaxInterval with zero should use default",
opt: WithReconnectMaxInterval(0),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultReconnectMaxInterval, c.ReconnectMaxInterval)
},
},
{
name: "WithCQLVersion should set CQLVersion",
opt: WithCQLVersion("3.1.0"),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, "3.1.0", c.CQLVersion)
},
},
{
name: "WithCQLVersion with empty should use default",
opt: WithCQLVersion(""),
validateConfig: func(t *testing.T, c *config) {
assert.Equal(t, defaultCqlVersion, c.CQLVersion)
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
tt.opt(cfg)
tt.validateConfig(t, cfg)
})
}
}
func TestMultipleOptions(t *testing.T) {
t.Run("multiple options should be applied correctly", func(t *testing.T) {
cfg := defaultConfig()
WithHosts("host1", "host2")(cfg)
WithPort(9999)(cfg)
WithKeyspace("test")(cfg)
WithAuth("user", "pass")(cfg)
assert.Equal(t, []string{"host1", "host2"}, cfg.Hosts)
assert.Equal(t, 9999, cfg.Port)
assert.Equal(t, "test", cfg.Keyspace)
assert.Equal(t, "user", cfg.Username)
assert.Equal(t, "pass", cfg.Password)
assert.True(t, cfg.UseAuth)
})
}

151
pkg/library/cassandra/errors.go
View File

@ -1,151 +0,0 @@
package cassandra
import (
"errors"
"fmt"
)
// ErrorCode 定義錯誤代碼
type ErrorCode string
const (
// ErrCodeNotFound 表示記錄未找到
ErrCodeNotFound ErrorCode = "NOT_FOUND"
// ErrCodeConflict 表示衝突（如唯一鍵衝突）
ErrCodeConflict ErrorCode = "CONFLICT"
// ErrCodeInvalidInput 表示輸入參數無效
ErrCodeInvalidInput ErrorCode = "INVALID_INPUT"
// ErrCodeMissingPartition 表示缺少 Partition Key
ErrCodeMissingPartition ErrorCode = "MISSING_PARTITION_KEY"
// ErrCodeNoFieldsToUpdate 表示沒有欄位需要更新
ErrCodeNoFieldsToUpdate ErrorCode = "NO_FIELDS_TO_UPDATE"
// ErrCodeMissingTableName 表示缺少 TableName 方法
ErrCodeMissingTableName ErrorCode = "MISSING_TABLE_NAME"
// ErrCodeMissingWhereCondition 表示缺少 WHERE 條件
ErrCodeMissingWhereCondition ErrorCode = "MISSING_WHERE_CONDITION"
// ErrCodeSAINotSupported 表示不支援 SAI
ErrCodeSAINotSupported ErrorCode = "SAI_NOT_SUPPORTED"
)
// Error 是統一的錯誤類型
type Error struct {
Code ErrorCode
Message string
Table string
Err error
}
// Error 實現 error 介面
func (e *Error) Error() string {
if e.Table != "" {
if e.Err != nil {
return fmt.Sprintf("cassandra[%s] (table: %s): %s: %v", e.Code, e.Table, e.Message, e.Err)
}
return fmt.Sprintf("cassandra[%s] (table: %s): %s", e.Code, e.Table, e.Message)
}
if e.Err != nil {
return fmt.Sprintf("cassandra[%s]: %s: %v", e.Code, e.Message, e.Err)
}
return fmt.Sprintf("cassandra[%s]: %s", e.Code, e.Message)
}
// Unwrap 返回底層錯誤
func (e *Error) Unwrap() error {
return e.Err
}
// WithTable 為錯誤添加表名資訊
func (e *Error) WithTable(table string) *Error {
return &Error{
Code: e.Code,
Message: e.Message,
Table: table,
Err: e.Err,
}
}
// WithError 為錯誤添加底層錯誤
func (e *Error) WithError(err error) *Error {
return &Error{
Code: e.Code,
Message: e.Message,
Table: e.Table,
Err: err,
}
}
// NewError 創建新的錯誤
func NewError(code ErrorCode, message string) *Error {
return &Error{
Code: code,
Message: message,
}
}
// 預定義錯誤
var (
// ErrNotFound 表示記錄未找到
ErrNotFound = &Error{
Code: ErrCodeNotFound,
Message: "record not found",
}
// ErrInvalidInput 表示輸入參數無效
ErrInvalidInput = &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input parameter",
}
// ErrNoPartitionKey 表示缺少 Partition Key
ErrNoPartitionKey = &Error{
Code: ErrCodeMissingPartition,
Message: "no partition key defined in struct",
}
// ErrMissingTableName 表示缺少 TableName 方法
ErrMissingTableName = &Error{
Code: ErrCodeMissingTableName,
Message: "struct must implement TableName() method",
}
// ErrNoFieldsToUpdate 表示沒有欄位需要更新
ErrNoFieldsToUpdate = &Error{
Code: ErrCodeNoFieldsToUpdate,
Message: "no fields to update",
}
// ErrMissingWhereCondition 表示缺少 WHERE 條件
ErrMissingWhereCondition = &Error{
Code: ErrCodeMissingWhereCondition,
Message: "operation requires at least one WHERE condition for safety",
}
// ErrMissingPartitionKey 表示 WHERE 條件中缺少 Partition Key
ErrMissingPartitionKey = &Error{
Code: ErrCodeMissingPartition,
Message: "operation requires all partition keys in WHERE clause",
}
// ErrSAINotSupported 表示不支援 SAI
ErrSAINotSupported = &Error{
Code: ErrCodeSAINotSupported,
Message: "SAI (Storage-Attached Indexing) is not supported in this Cassandra version",
}
)
// IsNotFound 檢查錯誤是否為 NotFound
func IsNotFound(err error) bool {
var e *Error
if errors.As(err, &e) {
return e.Code == ErrCodeNotFound
}
return false
}
// IsConflict 檢查錯誤是否為 Conflict
func IsConflict(err error) bool {
var e *Error
if errors.As(err, &e) {
return e.Code == ErrCodeConflict
}
return false
}

590
pkg/library/cassandra/errors_test.go
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@ -1,590 +0,0 @@
package cassandra
import (
"errors"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestError_Error(t *testing.T) {
tests := []struct {
name string
err *Error
want string
contains []string // 如果 want 為空，則檢查是否包含這些字串
}{
{
name: "error with code and message only",
err: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
},
want: "cassandra[NOT_FOUND]: record not found",
},
{
name: "error with code, message and table",
err: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
Table: "users",
},
want: "cassandra[NOT_FOUND] (table: users): record not found",
},
{
name: "error with code, message and underlying error",
err: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input parameter",
Err: errors.New("validation failed"),
},
contains: []string{
"cassandra[INVALID_INPUT]",
"invalid input parameter",
"validation failed",
},
},
{
name: "error with all fields",
err: &Error{
Code: ErrCodeConflict,
Message: "acquire lock failed",
Table: "locks",
Err: errors.New("lock already exists"),
},
contains: []string{
"cassandra[CONFLICT]",
"(table: locks)",
"acquire lock failed",
"lock already exists",
},
},
{
name: "error with empty message",
err: &Error{
Code: ErrCodeNotFound,
},
want: "cassandra[NOT_FOUND]: ",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.err.Error()
if tt.want != "" {
assert.Equal(t, tt.want, result)
} else {
for _, substr := range tt.contains {
assert.Contains(t, result, substr)
}
}
})
}
}
func TestError_Unwrap(t *testing.T) {
tests := []struct {
name string
err *Error
wantErr error
}{
{
name: "error with underlying error",
err: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input",
Err: errors.New("underlying error"),
},
wantErr: errors.New("underlying error"),
},
{
name: "error without underlying error",
err: &Error{
Code: ErrCodeNotFound,
Message: "not found",
},
wantErr: nil,
},
{
name: "error with nil underlying error",
err: &Error{
Code: ErrCodeNotFound,
Message: "not found",
Err: nil,
},
wantErr: nil,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.err.Unwrap()
if tt.wantErr == nil {
assert.Nil(t, result)
} else {
assert.Equal(t, tt.wantErr.Error(), result.Error())
}
})
}
}
func TestError_WithTable(t *testing.T) {
tests := []struct {
name string
err *Error
table string
wantCode ErrorCode
wantMsg string
wantTbl string
}{
{
name: "add table to error without table",
err: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
},
table: "users",
wantCode: ErrCodeNotFound,
wantMsg: "record not found",
wantTbl: "users",
},
{
name: "replace existing table",
err: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
Table: "old_table",
},
table: "new_table",
wantCode: ErrCodeNotFound,
wantMsg: "record not found",
wantTbl: "new_table",
},
{
name: "add table to error with underlying error",
err: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input",
Err: errors.New("validation failed"),
},
table: "products",
wantCode: ErrCodeInvalidInput,
wantMsg: "invalid input",
wantTbl: "products",
},
{
name: "add empty table",
err: &Error{
Code: ErrCodeNotFound,
Message: "not found",
},
table: "",
wantCode: ErrCodeNotFound,
wantMsg: "not found",
wantTbl: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.err.WithTable(tt.table)
assert.NotNil(t, result)
assert.Equal(t, tt.wantCode, result.Code)
assert.Equal(t, tt.wantMsg, result.Message)
assert.Equal(t, tt.wantTbl, result.Table)
// 確保是新的實例，不是修改原來的
assert.NotSame(t, tt.err, result)
})
}
}
func TestError_WithError(t *testing.T) {
tests := []struct {
name string
err *Error
underlying error
wantCode ErrorCode
wantMsg string
wantErr error
}{
{
name: "add underlying error to error without error",
err: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input",
},
underlying: errors.New("validation failed"),
wantCode: ErrCodeInvalidInput,
wantMsg: "invalid input",
wantErr: errors.New("validation failed"),
},
{
name: "replace existing underlying error",
err: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input",
Err: errors.New("old error"),
},
underlying: errors.New("new error"),
wantCode: ErrCodeInvalidInput,
wantMsg: "invalid input",
wantErr: errors.New("new error"),
},
{
name: "add nil underlying error",
err: &Error{
Code: ErrCodeNotFound,
Message: "not found",
},
underlying: nil,
wantCode: ErrCodeNotFound,
wantMsg: "not found",
wantErr: nil,
},
{
name: "add error to error with table",
err: &Error{
Code: ErrCodeConflict,
Message: "conflict",
Table: "locks",
},
underlying: errors.New("lock exists"),
wantCode: ErrCodeConflict,
wantMsg: "conflict",
wantErr: errors.New("lock exists"),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.err.WithError(tt.underlying)
assert.NotNil(t, result)
assert.Equal(t, tt.wantCode, result.Code)
assert.Equal(t, tt.wantMsg, result.Message)
// 確保是新的實例
assert.NotSame(t, tt.err, result)
// 檢查 underlying error
if tt.wantErr == nil {
assert.Nil(t, result.Err)
} else {
require.NotNil(t, result.Err)
assert.Equal(t, tt.wantErr.Error(), result.Err.Error())
}
})
}
}
func TestNewError(t *testing.T) {
tests := []struct {
name string
code ErrorCode
message string
want *Error
}{
{
name: "create NOT_FOUND error",
code: ErrCodeNotFound,
message: "record not found",
want: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
},
},
{
name: "create CONFLICT error",
code: ErrCodeConflict,
message: "lock acquisition failed",
want: &Error{
Code: ErrCodeConflict,
Message: "lock acquisition failed",
},
},
{
name: "create INVALID_INPUT error",
code: ErrCodeInvalidInput,
message: "invalid parameter",
want: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid parameter",
},
},
{
name: "create error with empty message",
code: ErrCodeNotFound,
message: "",
want: &Error{
Code: ErrCodeNotFound,
Message: "",
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := NewError(tt.code, tt.message)
assert.NotNil(t, result)
assert.Equal(t, tt.want.Code, result.Code)
assert.Equal(t, tt.want.Message, result.Message)
assert.Empty(t, result.Table)
assert.Nil(t, result.Err)
})
}
}
func TestIsNotFound(t *testing.T) {
tests := []struct {
name string
err error
want bool
}{
{
name: "Error with NOT_FOUND code",
err: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
},
want: true,
},
{
name: "Error with CONFLICT code",
err: &Error{
Code: ErrCodeConflict,
Message: "conflict",
},
want: false,
},
{
name: "Error with INVALID_INPUT code",
err: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input",
},
want: false,
},
{
name: "wrapped Error with NOT_FOUND code",
err: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
Err: errors.New("underlying error"),
},
want: true,
},
{
name: "standard error",
err: errors.New("standard error"),
want: false,
},
{
name: "nil error",
err: nil,
want: false,
},
{
name: "predefined ErrNotFound",
err: ErrNotFound,
want: true,
},
{
name: "predefined ErrNotFound with table",
err: ErrNotFound.WithTable("users"),
want: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := IsNotFound(tt.err)
assert.Equal(t, tt.want, result)
})
}
}
func TestIsConflict(t *testing.T) {
tests := []struct {
name string
err error
want bool
}{
{
name: "Error with CONFLICT code",
err: &Error{
Code: ErrCodeConflict,
Message: "conflict",
},
want: true,
},
{
name: "Error with NOT_FOUND code",
err: &Error{
Code: ErrCodeNotFound,
Message: "record not found",
},
want: false,
},
{
name: "Error with INVALID_INPUT code",
err: &Error{
Code: ErrCodeInvalidInput,
Message: "invalid input",
},
want: false,
},
{
name: "wrapped Error with CONFLICT code",
err: &Error{
Code: ErrCodeConflict,
Message: "conflict",
Err: errors.New("underlying error"),
},
want: true,
},
{
name: "standard error",
err: errors.New("standard error"),
want: false,
},
{
name: "nil error",
err: nil,
want: false,
},
{
name: "NewError with CONFLICT code",
err: NewError(ErrCodeConflict, "lock failed"),
want: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := IsConflict(tt.err)
assert.Equal(t, tt.want, result)
})
}
}
func TestPredefinedErrors(t *testing.T) {
tests := []struct {
name string
err *Error
wantCode ErrorCode
wantMsg string
}{
{
name: "ErrNotFound",
err: ErrNotFound,
wantCode: ErrCodeNotFound,
wantMsg: "record not found",
},
{
name: "ErrInvalidInput",
err: ErrInvalidInput,
wantCode: ErrCodeInvalidInput,
wantMsg: "invalid input parameter",
},
{
name: "ErrNoPartitionKey",
err: ErrNoPartitionKey,
wantCode: ErrCodeMissingPartition,
wantMsg: "no partition key defined in struct",
},
{
name: "ErrMissingTableName",
err: ErrMissingTableName,
wantCode: ErrCodeMissingTableName,
wantMsg: "struct must implement TableName() method",
},
{
name: "ErrNoFieldsToUpdate",
err: ErrNoFieldsToUpdate,
wantCode: ErrCodeNoFieldsToUpdate,
wantMsg: "no fields to update",
},
{
name: "ErrMissingWhereCondition",
err: ErrMissingWhereCondition,
wantCode: ErrCodeMissingWhereCondition,
wantMsg: "operation requires at least one WHERE condition for safety",
},
{
name: "ErrMissingPartitionKey",
err: ErrMissingPartitionKey,
wantCode: ErrCodeMissingPartition,
wantMsg: "operation requires all partition keys in WHERE clause",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
assert.NotNil(t, tt.err)
assert.Equal(t, tt.wantCode, tt.err.Code)
assert.Equal(t, tt.wantMsg, tt.err.Message)
assert.Empty(t, tt.err.Table)
assert.Nil(t, tt.err.Err)
})
}
}
func TestError_Chaining(t *testing.T) {
t.Run("chain WithTable and WithError", func(t *testing.T) {
err := NewError(ErrCodeNotFound, "record not found").
WithTable("users").
WithError(errors.New("database error"))
assert.Equal(t, ErrCodeNotFound, err.Code)
assert.Equal(t, "record not found", err.Message)
assert.Equal(t, "users", err.Table)
assert.NotNil(t, err.Err)
assert.Equal(t, "database error", err.Err.Error())
assert.True(t, IsNotFound(err))
})
t.Run("chain multiple WithTable calls", func(t *testing.T) {
err1 := ErrNotFound.WithTable("table1")
err2 := err1.WithTable("table2")
assert.Equal(t, "table1", err1.Table)
assert.Equal(t, "table2", err2.Table)
assert.NotSame(t, err1, err2)
})
t.Run("chain multiple WithError calls", func(t *testing.T) {
err1 := ErrInvalidInput.WithError(errors.New("error1"))
err2 := err1.WithError(errors.New("error2"))
assert.Equal(t, "error1", err1.Err.Error())
assert.Equal(t, "error2", err2.Err.Error())
assert.NotSame(t, err1, err2)
})
}
func TestError_ErrorsAs(t *testing.T) {
t.Run("errors.As works with Error", func(t *testing.T) {
err := ErrNotFound.WithTable("users")
var target *Error
ok := errors.As(err, &target)
assert.True(t, ok)
assert.NotNil(t, target)
assert.Equal(t, ErrCodeNotFound, target.Code)
assert.Equal(t, "users", target.Table)
})
t.Run("errors.As works with wrapped Error", func(t *testing.T) {
underlying := errors.New("underlying error")
err := ErrInvalidInput.WithError(underlying)
var target *Error
ok := errors.As(err, &target)
assert.True(t, ok)
assert.NotNil(t, target)
assert.Equal(t, ErrCodeInvalidInput, target.Code)
assert.Equal(t, underlying, target.Err)
})
t.Run("errors.Is works with Error", func(t *testing.T) {
err := ErrNotFound
assert.True(t, errors.Is(err, ErrNotFound))
assert.False(t, errors.Is(err, ErrInvalidInput))
})
}

120
pkg/library/cassandra/lock.go
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@ -1,120 +0,0 @@
package cassandra
import (
"context"
"errors"
"fmt"
"time"
"github.com/gocql/gocql"
"github.com/scylladb/gocqlx/v2/qb"
)
const (
defaultLockTTLSec = 30
defaultLockRetry = 3
lockBaseDelay = 100 * time.Millisecond
)
// LockOption 用來設定 TryLock 的 TTL 行為
type LockOption func(*lockOptions)
type lockOptions struct {
ttlSeconds int // TTL，單位秒；<=0 代表不 expire
}
// WithLockTTL 設定鎖的 TTL
func WithLockTTL(d time.Duration) LockOption {
return func(o *lockOptions) {
o.ttlSeconds = int(d.Seconds())
}
}
// WithNoLockExpire 永不自動解鎖
func WithNoLockExpire() LockOption {
return func(o *lockOptions) {
o.ttlSeconds = 0
}
}
// TryLock 嘗試在表上插入一筆唯一鍵（IF NOT EXISTS）作為鎖
// 預設 30 秒 TTL，可透過 option 調整或取消 TTL
func (r *repository[T]) TryLock(ctx context.Context, doc T, opts ...LockOption) error {
// 組合 option
options := &lockOptions{ttlSeconds: defaultLockTTLSec}
for _, opt := range opts {
opt(options)
}
// 建 TTL 子句
builder := qb.Insert(r.table).
Unique(). // IF NOT EXISTS
Columns(r.metadata.Columns...)
if options.ttlSeconds > 0 {
ttl := time.Duration(options.ttlSeconds) * time.Second
builder = builder.TTL(ttl)
}
stmt, names := builder.ToCql()
// 執行 CAS
q := r.db.session.Query(stmt, names).BindStruct(doc).
WithContext(ctx).
WithTimestamp(time.Now().UnixNano() / 1e3).
SerialConsistency(gocql.Serial)
applied, err := q.ExecCASRelease()
if err != nil {
return ErrInvalidInput.WithTable(r.table).WithError(err)
}
if !applied {
return NewError(ErrCodeConflict, "acquire lock failed").WithTable(r.table)
}
return nil
}
// UnLock 釋放鎖，其實就是 Delete
func (r *repository[T]) UnLock(ctx context.Context, doc T) error {
var lastErr error
for i := 0; i < defaultLockRetry; i++ {
builder := qb.Delete(r.table).Existing()
// 動態添加 WHERE 條件（使用 Partition Key）
for _, key := range r.metadata.PartKey {
builder = builder.Where(qb.Eq(key))
}
stmt, names := builder.ToCql()
q := r.db.session.Query(stmt, names).BindStruct(doc).
WithContext(ctx).
WithTimestamp(time.Now().UnixNano() / 1e3).
SerialConsistency(gocql.Serial)
applied, err := q.ExecCASRelease()
if err == nil && applied {
return nil
}
if err != nil {
lastErr = fmt.Errorf("unlock error: %w", err)
} else if !applied {
lastErr = fmt.Errorf("unlock not applied: row not found or not visible yet")
}
time.Sleep(lockBaseDelay * time.Duration(1<<i)) // 100ms → 200ms → 400ms
}
return ErrInvalidInput.WithTable(r.table).WithError(
fmt.Errorf("unlock failed after %d retries: %w", defaultLockRetry, lastErr),
)
}
// IsLockFailed 檢查錯誤是否為獲取鎖失敗
func IsLockFailed(err error) bool {
var e *Error
if errors.As(err, &e) {
return e.Code == ErrCodeConflict && e.Message == "acquire lock failed"
}
return false
}

503
pkg/library/cassandra/lock_test.go
View File

@ -1,503 +0,0 @@
package cassandra
import (
"errors"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func TestWithLockTTL(t *testing.T) {
tests := []struct {
name string
duration time.Duration
wantTTL int
description string
}{
{
name: "30 seconds TTL",
duration: 30 * time.Second,
wantTTL: 30,
description: "should set TTL to 30 seconds",
},
{
name: "1 minute TTL",
duration: 1 * time.Minute,
wantTTL: 60,
description: "should set TTL to 60 seconds",
},
{
name: "5 minutes TTL",
duration: 5 * time.Minute,
wantTTL: 300,
description: "should set TTL to 300 seconds",
},
{
name: "1 hour TTL",
duration: 1 * time.Hour,
wantTTL: 3600,
description: "should set TTL to 3600 seconds",
},
{
name: "zero duration",
duration: 0,
wantTTL: 0,
description: "should set TTL to 0",
},
{
name: "negative duration",
duration: -10 * time.Second,
wantTTL: -10,
description: "should set TTL to negative value",
},
{
name: "fractional seconds",
duration: 1500 * time.Millisecond,
wantTTL: 1,
description: "should round down fractional seconds",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
opt := WithLockTTL(tt.duration)
options := &lockOptions{}
opt(options)
assert.Equal(t, tt.wantTTL, options.ttlSeconds, tt.description)
})
}
}
func TestWithNoLockExpire(t *testing.T) {
t.Run("should set TTL to 0", func(t *testing.T) {
opt := WithNoLockExpire()
options := &lockOptions{ttlSeconds: 30} // 先設置一個值
opt(options)
assert.Equal(t, 0, options.ttlSeconds)
})
t.Run("should override existing TTL", func(t *testing.T) {
opt := WithNoLockExpire()
options := &lockOptions{ttlSeconds: 100}
opt(options)
assert.Equal(t, 0, options.ttlSeconds)
})
}
func TestLockOptions_Combination(t *testing.T) {
tests := []struct {
name string
opts []LockOption
wantTTL int
}{
{
name: "WithLockTTL then WithNoLockExpire",
opts: []LockOption{WithLockTTL(60 * time.Second), WithNoLockExpire()},
wantTTL: 0, // WithNoLockExpire should override
},
{
name: "WithNoLockExpire then WithLockTTL",
opts: []LockOption{WithNoLockExpire(), WithLockTTL(60 * time.Second)},
wantTTL: 60, // WithLockTTL should override
},
{
name: "multiple WithLockTTL calls",
opts: []LockOption{WithLockTTL(30 * time.Second), WithLockTTL(60 * time.Second)},
wantTTL: 60, // Last one wins
},
{
name: "multiple WithNoLockExpire calls",
opts: []LockOption{WithNoLockExpire(), WithNoLockExpire()},
wantTTL: 0,
},
{
name: "empty options should use default",
opts: []LockOption{},
wantTTL: defaultLockTTLSec,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
options := &lockOptions{ttlSeconds: defaultLockTTLSec}
for _, opt := range tt.opts {
opt(options)
}
assert.Equal(t, tt.wantTTL, options.ttlSeconds)
})
}
}
func TestIsLockFailed(t *testing.T) {
tests := []struct {
name string
err error
want bool
}{
{
name: "Error with CONFLICT code and correct message",
err: NewError(ErrCodeConflict, "acquire lock failed"),
want: true,
},
{
name: "Error with CONFLICT code and correct message with table",
err: NewError(ErrCodeConflict, "acquire lock failed").WithTable("locks"),
want: true,
},
{
name: "Error with CONFLICT code but wrong message",
err: NewError(ErrCodeConflict, "different message"),
want: false,
},
{
name: "Error with NOT_FOUND code and correct message",
err: NewError(ErrCodeNotFound, "acquire lock failed"),
want: false,
},
{
name: "Error with INVALID_INPUT code",
err: ErrInvalidInput,
want: false,
},
{
name: "wrapped Error with CONFLICT code and correct message",
err: NewError(ErrCodeConflict, "acquire lock failed").
WithError(errors.New("underlying error")),
want: true,
},
{
name: "standard error",
err: errors.New("standard error"),
want: false,
},
{
name: "nil error",
err: nil,
want: false,
},
{
name: "Error with CONFLICT code but empty message",
err: NewError(ErrCodeConflict, ""),
want: false,
},
{
name: "Error with CONFLICT code and similar but different message",
err: NewError(ErrCodeConflict, "acquire lock failed!"),
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := IsLockFailed(tt.err)
assert.Equal(t, tt.want, result)
})
}
}
func TestLockConstants(t *testing.T) {
tests := []struct {
name string
constant interface{}
expected interface{}
}{
{
name: "defaultLockTTLSec should be 30",
constant: defaultLockTTLSec,
expected: 30,
},
{
name: "defaultLockRetry should be 3",
constant: defaultLockRetry,
expected: 3,
},
{
name: "lockBaseDelay should be 100ms",
constant: lockBaseDelay,
expected: 100 * time.Millisecond,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
assert.Equal(t, tt.expected, tt.constant)
})
}
}
func TestLockOptions_DefaultValues(t *testing.T) {
t.Run("default lockOptions should have default TTL", func(t *testing.T) {
options := &lockOptions{ttlSeconds: defaultLockTTLSec}
assert.Equal(t, defaultLockTTLSec, options.ttlSeconds)
})
t.Run("lockOptions with zero TTL", func(t *testing.T) {
options := &lockOptions{ttlSeconds: 0}
assert.Equal(t, 0, options.ttlSeconds)
})
t.Run("lockOptions with negative TTL", func(t *testing.T) {
options := &lockOptions{ttlSeconds: -1}
assert.Equal(t, -1, options.ttlSeconds)
})
}
func TestTryLock_ErrorScenarios(t *testing.T) {
tests := []struct {
name string
description string
// 注意：實際的 TryLock 測試需要 mock session 或實際的資料庫連接
// 這裡只是定義測試結構
}{
{
name: "successful lock acquisition",
description: "should return nil when lock is successfully acquired",
},
{
name: "lock already exists",
description: "should return CONFLICT error when lock already exists",
},
{
name: "database error",
description: "should return INVALID_INPUT error with underlying error when database operation fails",
},
{
name: "context cancellation",
description: "should respect context cancellation",
},
{
name: "with custom TTL",
description: "should use custom TTL when provided",
},
{
name: "with no expire",
description: "should not set TTL when WithNoLockExpire is used",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestUnLock_ErrorScenarios(t *testing.T) {
tests := []struct {
name string
description string
// 注意：實際的 UnLock 測試需要 mock session 或實際的資料庫連接
// 這裡只是定義測試結構
}{
{
name: "successful unlock",
description: "should return nil when lock is successfully released",
},
{
name: "lock not found",
description: "should retry when lock is not found",
},
{
name: "database error",
description: "should retry on database error",
},
{
name: "max retries exceeded",
description: "should return error after max retries",
},
{
name: "context cancellation",
description: "should respect context cancellation",
},
{
name: "exponential backoff",
description: "should use exponential backoff between retries",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestLockOption_Type(t *testing.T) {
t.Run("WithLockTTL should return LockOption", func(t *testing.T) {
opt := WithLockTTL(30 * time.Second)
assert.NotNil(t, opt)
// 驗證它是一個函數
var lockOpt LockOption = opt
assert.NotNil(t, lockOpt)
})
t.Run("WithNoLockExpire should return LockOption", func(t *testing.T) {
opt := WithNoLockExpire()
assert.NotNil(t, opt)
// 驗證它是一個函數
var lockOpt LockOption = opt
assert.NotNil(t, lockOpt)
})
}
func TestLockOptions_ApplyOrder(t *testing.T) {
t.Run("last option should win", func(t *testing.T) {
options := &lockOptions{ttlSeconds: defaultLockTTLSec}
WithLockTTL(60 * time.Second)(options)
assert.Equal(t, 60, options.ttlSeconds)
WithNoLockExpire()(options)
assert.Equal(t, 0, options.ttlSeconds)
WithLockTTL(120 * time.Second)(options)
assert.Equal(t, 120, options.ttlSeconds)
})
}
func TestIsLockFailed_EdgeCases(t *testing.T) {
tests := []struct {
name string
err error
want bool
}{
{
name: "Error with CONFLICT code, correct message, and underlying error",
err: NewError(ErrCodeConflict, "acquire lock failed").
WithTable("locks").
WithError(errors.New("database error")),
want: true,
},
{
name: "Error with CONFLICT code but message with extra spaces",
err: NewError(ErrCodeConflict, " acquire lock failed "),
want: false,
},
{
name: "Error with CONFLICT code but message with different case",
err: NewError(ErrCodeConflict, "Acquire Lock Failed"),
want: false,
},
{
name: "chained errors with CONFLICT",
err: func() error {
err1 := NewError(ErrCodeConflict, "acquire lock failed")
err2 := errors.New("wrapped")
return errors.Join(err1, err2)
}(),
want: true, // errors.Join preserves Error type and errors.As can find it
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := IsLockFailed(tt.err)
assert.Equal(t, tt.want, result)
})
}
}
func TestLockOptions_ZeroValue(t *testing.T) {
t.Run("zero value lockOptions", func(t *testing.T) {
var options lockOptions
assert.Equal(t, 0, options.ttlSeconds)
})
t.Run("apply option to zero value", func(t *testing.T) {
var options lockOptions
WithLockTTL(30 * time.Second)(&options)
assert.Equal(t, 30, options.ttlSeconds)
})
}
func TestLockRetryDelay(t *testing.T) {
t.Run("verify exponential backoff calculation", func(t *testing.T) {
// 驗證重試延遲的計算邏輯
// 100ms → 200ms → 400ms
expectedDelays := []time.Duration{
lockBaseDelay * time.Duration(1<<0), // 100ms * 1 = 100ms
lockBaseDelay * time.Duration(1<<1), // 100ms * 2 = 200ms
lockBaseDelay * time.Duration(1<<2), // 100ms * 4 = 400ms
}
assert.Equal(t, 100*time.Millisecond, expectedDelays[0])
assert.Equal(t, 200*time.Millisecond, expectedDelays[1])
assert.Equal(t, 400*time.Millisecond, expectedDelays[2])
})
}
func TestLockOption_InterfaceCompliance(t *testing.T) {
t.Run("LockOption should be a function type", func(t *testing.T) {
// 驗證 LockOption 是一個函數類型
var fn func(*lockOptions) = WithLockTTL(30 * time.Second)
assert.NotNil(t, fn)
})
t.Run("LockOption can be assigned from WithLockTTL", func(t *testing.T) {
var opt LockOption = WithLockTTL(30 * time.Second)
assert.NotNil(t, opt)
})
t.Run("LockOption can be assigned from WithNoLockExpire", func(t *testing.T) {
var opt LockOption = WithNoLockExpire()
assert.NotNil(t, opt)
})
}
func TestLockOptions_RealWorldScenarios(t *testing.T) {
tests := []struct {
name string
scenario func(*lockOptions)
wantTTL int
}{
{
name: "short-lived lock (5 seconds)",
scenario: func(o *lockOptions) {
WithLockTTL(5 * time.Second)(o)
},
wantTTL: 5,
},
{
name: "medium-lived lock (5 minutes)",
scenario: func(o *lockOptions) {
WithLockTTL(5 * time.Minute)(o)
},
wantTTL: 300,
},
{
name: "long-lived lock (1 hour)",
scenario: func(o *lockOptions) {
WithLockTTL(1 * time.Hour)(o)
},
wantTTL: 3600,
},
{
name: "permanent lock",
scenario: func(o *lockOptions) {
WithNoLockExpire()(o)
},
wantTTL: 0,
},
{
name: "default lock",
scenario: func(o *lockOptions) {
// 不應用任何選項，使用預設值
},
wantTTL: defaultLockTTLSec,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
options := &lockOptions{ttlSeconds: defaultLockTTLSec}
tt.scenario(options)
assert.Equal(t, tt.wantTTL, options.ttlSeconds)
})
}
}

136
pkg/library/cassandra/metadata.go
View File

@ -1,136 +0,0 @@
package cassandra
import (
"fmt"
"reflect"
"sync"
"unicode"
"github.com/scylladb/gocqlx/v2/table"
)
var (
// metadataCache 快取已生成的 Metadata，避免重複反射解析
// key: tableName + ":" + structType (不包含 keyspace，因為同一個 struct 在不同 keyspace 結構相同)
metadataCache sync.Map
)
type cachedMetadata struct {
columns []string
partKeys []string
sortKeys []string
err error
}
// generateMetadata 根據傳入的 struct 產生 table.Metadata
// 使用快取機制避免重複反射解析，提升效能
func generateMetadata[T Table](doc T, keyspace string) (table.Metadata, error) {
// 取得型別資訊
t := reflect.TypeOf(doc)
if t.Kind() == reflect.Ptr {
t = t.Elem()
}
// 取得表名稱
tableName := doc.TableName()
if tableName == "" {
return table.Metadata{}, ErrMissingTableName
}
// 構建快取 key: tableName:structType (不包含 keyspace)
cacheKey := fmt.Sprintf("%s:%s", tableName, t.String())
// 檢查快取
if cached, ok := metadataCache.Load(cacheKey); ok {
cachedMeta := cached.(cachedMetadata)
if cachedMeta.err != nil {
return table.Metadata{}, cachedMeta.err
}
// 從快取構建 metadata，動態加上 keyspace
meta := table.Metadata{
Name: fmt.Sprintf("%s.%s", keyspace, tableName),
Columns: make([]string, len(cachedMeta.columns)),
PartKey: make([]string, len(cachedMeta.partKeys)),
SortKey: make([]string, len(cachedMeta.sortKeys)),
}
copy(meta.Columns, cachedMeta.columns)
copy(meta.PartKey, cachedMeta.partKeys)
copy(meta.SortKey, cachedMeta.sortKeys)
return meta, nil
}
// 快取未命中，生成 metadata
columns := make([]string, 0, t.NumField())
partKeys := make([]string, 0, t.NumField())
sortKeys := make([]string, 0, t.NumField())
// 遍歷所有 exported 欄位
for i := 0; i < t.NumField(); i++ {
field := t.Field(i)
// 跳過 unexported 欄位
if field.PkgPath != "" {
continue
}
// 如果欄位有標記 db:"-" 則跳過
if tag := field.Tag.Get(DBFiledName); tag == "-" {
continue
}
// 取得欄位名稱
colName := field.Tag.Get(DBFiledName)
if colName == "" {
colName = toSnakeCase(field.Name)
}
columns = append(columns, colName)
// 若有 partition_key:"true" 標記，加入 PartKey
if field.Tag.Get(Pk) == "true" {
partKeys = append(partKeys, colName)
}
// 若有 clustering_key:"true" 標記，加入 SortKey
if field.Tag.Get(ClusterKey) == "true" {
sortKeys = append(sortKeys, colName)
}
}
if len(partKeys) == 0 {
err := ErrNoPartitionKey
// 快取錯誤結果
metadataCache.Store(cacheKey, cachedMetadata{err: err})
return table.Metadata{}, err
}
// 快取成功結果（只存結構資訊，不包含 keyspace）
cachedMeta := cachedMetadata{
columns: make([]string, len(columns)),
partKeys: make([]string, len(partKeys)),
sortKeys: make([]string, len(sortKeys)),
}
copy(cachedMeta.columns, columns)
copy(cachedMeta.partKeys, partKeys)
copy(cachedMeta.sortKeys, sortKeys)
metadataCache.Store(cacheKey, cachedMeta)
// 組合並返回 Metadata（包含 keyspace）
meta := table.Metadata{
Name: fmt.Sprintf("%s.%s", keyspace, tableName),
Columns: columns,
PartKey: partKeys,
SortKey: sortKeys,
}
return meta, nil
}
// toSnakeCase 將 CamelCase 字串轉換為 snake_case
func toSnakeCase(s string) string {
var result []rune
for i, r := range s {
if unicode.IsUpper(r) {
if i > 0 {
result = append(result, '_')
}
result = append(result, unicode.ToLower(r))
} else {
result = append(result, r)
}
}
return string(result)
}

500
pkg/library/cassandra/metadata_test.go
View File

@ -1,500 +0,0 @@
package cassandra
import (
"testing"
"github.com/scylladb/gocqlx/v2/table"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestToSnakeCase(t *testing.T) {
tests := []struct {
name string
input string
expected string
}{
{
name: "simple CamelCase",
input: "UserName",
expected: "user_name",
},
{
name: "single word",
input: "User",
expected: "user",
},
{
name: "multiple words",
input: "UserAccountBalance",
expected: "user_account_balance",
},
{
name: "already lowercase",
input: "username",
expected: "username",
},
{
name: "all uppercase",
input: "USERNAME",
expected: "u_s_e_r_n_a_m_e",
},
{
name: "mixed case",
input: "XMLParser",
expected: "x_m_l_parser",
},
{
name: "empty string",
input: "",
expected: "",
},
{
name: "single character",
input: "A",
expected: "a",
},
{
name: "with numbers",
input: "UserID123",
expected: "user_i_d123",
},
{
name: "ID at end",
input: "UserID",
expected: "user_i_d",
},
{
name: "ID at start",
input: "IDUser",
expected: "i_d_user",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := toSnakeCase(tt.input)
assert.Equal(t, tt.expected, result)
})
}
}
// 測試用的 struct 定義
type testUser struct {
ID string `db:"id" partition_key:"true"`
Name string `db:"name"`
Email string `db:"email"`
CreatedAt int64 `db:"created_at"`
}
func (t testUser) TableName() string {
return "users"
}
type testUserNoTableName struct {
ID string `db:"id" partition_key:"true"`
}
func (t testUserNoTableName) TableName() string {
return ""
}
type testUserNoPartitionKey struct {
ID string `db:"id"`
Name string `db:"name"`
}
func (t testUserNoPartitionKey) TableName() string {
return "users"
}
type testUserWithClusteringKey struct {
ID string `db:"id" partition_key:"true"`
Timestamp int64 `db:"timestamp" clustering_key:"true"`
Data string `db:"data"`
}
func (t testUserWithClusteringKey) TableName() string {
return "events"
}
type testUserWithMultiplePartitionKeys struct {
UserID string `db:"user_id" partition_key:"true"`
AccountID string `db:"account_id" partition_key:"true"`
Balance int64 `db:"balance"`
}
func (t testUserWithMultiplePartitionKeys) TableName() string {
return "accounts"
}
type testUserWithAutoSnakeCase struct {
UserID string `db:"user_id" partition_key:"true"`
AccountName string // 沒有 db tag，應該自動轉換為 snake_case
EmailAddr string `db:"email_addr"`
}
func (t testUserWithAutoSnakeCase) TableName() string {
return "profiles"
}
type testUserWithIgnoredField struct {
ID string `db:"id" partition_key:"true"`
Name string `db:"name"`
Password string `db:"-"` // 應該被忽略
CreatedAt int64 `db:"created_at"`
}
func (t testUserWithIgnoredField) TableName() string {
return "users"
}
type testUserUnexported struct {
ID string `db:"id" partition_key:"true"`
name string // unexported，應該被忽略
Email string `db:"email"`
createdAt int64 // unexported，應該被忽略
}
func (t testUserUnexported) TableName() string {
return "users"
}
type testUserPointer struct {
ID *string `db:"id" partition_key:"true"`
Name string `db:"name"`
}
func (t testUserPointer) TableName() string {
return "users"
}
func TestGenerateMetadata_Basic(t *testing.T) {
tests := []struct {
name string
doc interface{}
keyspace string
wantErr bool
errCode ErrorCode
checkFunc func(*testing.T, table.Metadata, string)
}{
{
name: "valid user struct",
doc: testUser{ID: "1", Name: "Alice"},
keyspace: "test_keyspace",
wantErr: false,
checkFunc: func(t *testing.T, meta table.Metadata, keyspace string) {
assert.Equal(t, keyspace+".users", meta.Name)
assert.Contains(t, meta.Columns, "id")
assert.Contains(t, meta.Columns, "name")
assert.Contains(t, meta.Columns, "email")
assert.Contains(t, meta.Columns, "created_at")
assert.Contains(t, meta.PartKey, "id")
assert.Empty(t, meta.SortKey)
},
},
{
name: "user with clustering key",
doc: testUserWithClusteringKey{ID: "1", Timestamp: 1234567890},
keyspace: "events_db",
wantErr: false,
checkFunc: func(t *testing.T, meta table.Metadata, keyspace string) {
assert.Equal(t, keyspace+".events", meta.Name)
assert.Contains(t, meta.PartKey, "id")
assert.Contains(t, meta.SortKey, "timestamp")
assert.Contains(t, meta.Columns, "data")
},
},
{
name: "user with multiple partition keys",
doc: testUserWithMultiplePartitionKeys{UserID: "1", AccountID: "2"},
keyspace: "finance",
wantErr: false,
checkFunc: func(t *testing.T, meta table.Metadata, keyspace string) {
assert.Equal(t, keyspace+".accounts", meta.Name)
assert.Contains(t, meta.PartKey, "user_id")
assert.Contains(t, meta.PartKey, "account_id")
assert.Len(t, meta.PartKey, 2)
},
},
{
name: "user with auto snake_case conversion",
doc: testUserWithAutoSnakeCase{UserID: "1", AccountName: "test"},
keyspace: "test",
wantErr: false,
checkFunc: func(t *testing.T, meta table.Metadata, keyspace string) {
assert.Contains(t, meta.Columns, "account_name") // 自動轉換
assert.Contains(t, meta.Columns, "user_id")
assert.Contains(t, meta.Columns, "email_addr")
},
},
{
name: "user with ignored field",
doc: testUserWithIgnoredField{ID: "1", Name: "Alice"},
keyspace: "test",
wantErr: false,
checkFunc: func(t *testing.T, meta table.Metadata, keyspace string) {
assert.Contains(t, meta.Columns, "id")
assert.Contains(t, meta.Columns, "name")
assert.Contains(t, meta.Columns, "created_at")
assert.NotContains(t, meta.Columns, "password") // 應該被忽略
},
},
{
name: "user with unexported fields",
doc: testUserUnexported{ID: "1", Email: "test@example.com"},
keyspace: "test",
wantErr: false,
checkFunc: func(t *testing.T, meta table.Metadata, keyspace string) {
assert.Contains(t, meta.Columns, "id")
assert.Contains(t, meta.Columns, "email")
assert.NotContains(t, meta.Columns, "name") // unexported
assert.NotContains(t, meta.Columns, "created_at") // unexported
},
},
{
name: "user pointer type",
doc: &testUserPointer{ID: stringPtr("1"), Name: "Alice"},
keyspace: "test",
wantErr: false,
checkFunc: func(t *testing.T, meta table.Metadata, keyspace string) {
assert.Equal(t, keyspace+".users", meta.Name)
assert.Contains(t, meta.Columns, "id")
assert.Contains(t, meta.Columns, "name")
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var meta table.Metadata
var err error
switch doc := tt.doc.(type) {
case testUser:
meta, err = generateMetadata(doc, tt.keyspace)
case testUserWithClusteringKey:
meta, err = generateMetadata(doc, tt.keyspace)
case testUserWithMultiplePartitionKeys:
meta, err = generateMetadata(doc, tt.keyspace)
case testUserWithAutoSnakeCase:
meta, err = generateMetadata(doc, tt.keyspace)
case testUserWithIgnoredField:
meta, err = generateMetadata(doc, tt.keyspace)
case testUserUnexported:
meta, err = generateMetadata(doc, tt.keyspace)
case *testUserPointer:
meta, err = generateMetadata(*doc, tt.keyspace)
default:
t.Fatalf("unsupported type: %T", doc)
}
if tt.wantErr {
require.Error(t, err)
if tt.errCode != "" {
var e *Error
if assert.ErrorAs(t, err, &e) {
assert.Equal(t, tt.errCode, e.Code)
}
}
} else {
require.NoError(t, err)
if tt.checkFunc != nil {
tt.checkFunc(t, meta, tt.keyspace)
}
}
})
}
}
func TestGenerateMetadata_ErrorCases(t *testing.T) {
tests := []struct {
name string
doc interface{}
keyspace string
wantErr bool
errCode ErrorCode
}{
{
name: "missing table name",
doc: testUserNoTableName{ID: "1"},
keyspace: "test",
wantErr: true,
errCode: ErrCodeMissingTableName,
},
{
name: "missing partition key",
doc: testUserNoPartitionKey{ID: "1", Name: "Alice"},
keyspace: "test",
wantErr: true,
errCode: ErrCodeMissingPartition,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var err error
switch doc := tt.doc.(type) {
case testUserNoTableName:
_, err = generateMetadata(doc, tt.keyspace)
case testUserNoPartitionKey:
_, err = generateMetadata(doc, tt.keyspace)
default:
t.Fatalf("unsupported type: %T", doc)
}
if tt.wantErr {
require.Error(t, err)
if tt.errCode != "" {
var e *Error
if assert.ErrorAs(t, err, &e) {
assert.Equal(t, tt.errCode, e.Code)
}
}
} else {
require.NoError(t, err)
}
})
}
}
func TestGenerateMetadata_Cache(t *testing.T) {
t.Run("cache hit for same struct type", func(t *testing.T) {
doc1 := testUser{ID: "1", Name: "Alice"}
meta1, err1 := generateMetadata(doc1, "keyspace1")
require.NoError(t, err1)
// 使用不同的 keyspace，但應該從快取獲取（不包含 keyspace）
doc2 := testUser{ID: "2", Name: "Bob"}
meta2, err2 := generateMetadata(doc2, "keyspace2")
require.NoError(t, err2)
// 驗證結構相同，但 keyspace 不同
assert.Equal(t, "keyspace1.users", meta1.Name)
assert.Equal(t, "keyspace2.users", meta2.Name)
assert.Equal(t, meta1.Columns, meta2.Columns)
assert.Equal(t, meta1.PartKey, meta2.PartKey)
assert.Equal(t, meta1.SortKey, meta2.SortKey)
})
t.Run("cache hit for error case", func(t *testing.T) {
doc1 := testUserNoPartitionKey{ID: "1", Name: "Alice"}
_, err1 := generateMetadata(doc1, "keyspace1")
require.Error(t, err1)
// 第二次調用應該從快取獲取錯誤
doc2 := testUserNoPartitionKey{ID: "2", Name: "Bob"}
_, err2 := generateMetadata(doc2, "keyspace2")
require.Error(t, err2)
// 錯誤應該相同
assert.Equal(t, err1.Error(), err2.Error())
})
t.Run("cache miss for different struct type", func(t *testing.T) {
doc1 := testUser{ID: "1"}
meta1, err1 := generateMetadata(doc1, "test")
require.NoError(t, err1)
doc2 := testUserWithClusteringKey{ID: "1", Timestamp: 123}
meta2, err2 := generateMetadata(doc2, "test")
require.NoError(t, err2)
// 應該是不同的 metadata
assert.NotEqual(t, meta1.Name, meta2.Name)
assert.NotEqual(t, meta1.Columns, meta2.Columns)
})
}
func TestGenerateMetadata_DifferentKeyspaces(t *testing.T) {
t.Run("same struct with different keyspaces", func(t *testing.T) {
doc := testUser{ID: "1", Name: "Alice"}
meta1, err1 := generateMetadata(doc, "keyspace1")
require.NoError(t, err1)
meta2, err2 := generateMetadata(doc, "keyspace2")
require.NoError(t, err2)
// 結構應該相同，但 keyspace 不同
assert.Equal(t, "keyspace1.users", meta1.Name)
assert.Equal(t, "keyspace2.users", meta2.Name)
assert.Equal(t, meta1.Columns, meta2.Columns)
assert.Equal(t, meta1.PartKey, meta2.PartKey)
})
}
func TestGenerateMetadata_EmptyKeyspace(t *testing.T) {
t.Run("empty keyspace", func(t *testing.T) {
doc := testUser{ID: "1", Name: "Alice"}
meta, err := generateMetadata(doc, "")
require.NoError(t, err)
assert.Equal(t, ".users", meta.Name)
})
}
func TestGenerateMetadata_PointerVsValue(t *testing.T) {
t.Run("pointer and value should produce same metadata", func(t *testing.T) {
doc1 := testUser{ID: "1", Name: "Alice"}
meta1, err1 := generateMetadata(doc1, "test")
require.NoError(t, err1)
doc2 := &testUser{ID: "2", Name: "Bob"}
meta2, err2 := generateMetadata(*doc2, "test")
require.NoError(t, err2)
// 應該產生相同的 metadata（除了可能的值不同）
assert.Equal(t, meta1.Name, meta2.Name)
assert.Equal(t, meta1.Columns, meta2.Columns)
assert.Equal(t, meta1.PartKey, meta2.PartKey)
})
}
func TestGenerateMetadata_ColumnOrder(t *testing.T) {
t.Run("columns should maintain struct field order", func(t *testing.T) {
doc := testUser{ID: "1", Name: "Alice", Email: "alice@example.com"}
meta, err := generateMetadata(doc, "test")
require.NoError(t, err)
// 驗證欄位順序（根據 struct 定義）
assert.Equal(t, "id", meta.Columns[0])
assert.Equal(t, "name", meta.Columns[1])
assert.Equal(t, "email", meta.Columns[2])
assert.Equal(t, "created_at", meta.Columns[3])
})
}
func TestGenerateMetadata_AllTagCombinations(t *testing.T) {
type testAllTags struct {
PartitionKey string `db:"partition_key" partition_key:"true"`
ClusteringKey string `db:"clustering_key" clustering_key:"true"`
RegularField string `db:"regular_field"`
AutoSnakeCase string // 沒有 db tag
IgnoredField string `db:"-"`
unexportedField string // unexported
}
var testAllTagsTableName = "all_tags"
testAllTagsTableNameFunc := func() string { return testAllTagsTableName }
// 使用反射來動態設置 TableName 方法
// 但由於 Go 的限制，我們需要一個實際的方法
// 這裡我們創建一個包裝類型
type testAllTagsWrapper struct {
testAllTags
}
// 這個方法無法在運行時添加，所以我們需要一個實際的實現
// 讓我們使用一個不同的方法
t.Run("all tag combinations", func(t *testing.T) {
// 由於無法動態添加方法，我們跳過這個測試
// 或者創建一個實際的 struct
_ = testAllTagsWrapper{}
_ = testAllTagsTableNameFunc
})
}
// 輔助函數
func stringPtr(s string) *string {
return &s
}

162
pkg/library/cassandra/option.go
View File

@ -1,162 +0,0 @@
package cassandra
import (
"time"
"github.com/gocql/gocql"
)
// config 是初始化 DB 所需的內部設定（私有）
type config struct {
Hosts []string // Cassandra 主機列表
Port int // 連線埠
Keyspace string // 預設使用的 Keyspace
Username string // 認證用戶名
Password string // 認證密碼
Consistency gocql.Consistency // 一致性級別
ConnectTimeoutSec int // 連線逾時秒數
NumConns int // 每個節點連線數
MaxRetries int // 重試次數
UseAuth bool // 是否使用帳號密碼驗證
RetryMinInterval time.Duration // 重試間隔最小值
RetryMaxInterval time.Duration // 重試間隔最大值
ReconnectInitialInterval time.Duration // 重連初始間隔
ReconnectMaxInterval time.Duration // 重連最大間隔
CQLVersion string // 執行連線的CQL 版本號
}
// defaultConfig 返回預設配置
func defaultConfig() *config {
return &config{
Port: defaultPort,
Consistency: defaultConsistency,
ConnectTimeoutSec: defaultTimeoutSec,
NumConns: defaultNumConns,
MaxRetries: defaultMaxRetries,
RetryMinInterval: defaultRetryMinInterval,
RetryMaxInterval: defaultRetryMaxInterval,
ReconnectInitialInterval: defaultReconnectInitialInterval,
ReconnectMaxInterval: defaultReconnectMaxInterval,
CQLVersion: defaultCqlVersion,
}
}
// Option 是設定選項的函數型別
type Option func(*config)
// WithHosts 設定 Cassandra 主機列表
func WithHosts(hosts ...string) Option {
return func(c *config) {
c.Hosts = hosts
}
}
// WithPort 設定連線埠
func WithPort(port int) Option {
return func(c *config) {
c.Port = port
}
}
// WithKeyspace 設定預設 keyspace
func WithKeyspace(keyspace string) Option {
return func(c *config) {
c.Keyspace = keyspace
}
}
// WithAuth 設定認證資訊
func WithAuth(username, password string) Option {
return func(c *config) {
c.Username = username
c.Password = password
c.UseAuth = true
}
}
// WithConsistency 設定一致性級別
func WithConsistency(consistency gocql.Consistency) Option {
return func(c *config) {
c.Consistency = consistency
}
}
// WithConnectTimeoutSec 設定連線逾時秒數
func WithConnectTimeoutSec(timeout int) Option {
return func(c *config) {
if timeout <= 0 {
timeout = defaultTimeoutSec
}
c.ConnectTimeoutSec = timeout
}
}
// WithNumConns 設定每個節點的連線數
func WithNumConns(numConns int) Option {
return func(c *config) {
if numConns <= 0 {
numConns = defaultNumConns
}
c.NumConns = numConns
}
}
// WithMaxRetries 設定最大重試次數
func WithMaxRetries(maxRetries int) Option {
return func(c *config) {
if maxRetries <= 0 {
maxRetries = defaultMaxRetries
}
c.MaxRetries = maxRetries
}
}
// WithRetryMinInterval 設定最小重試間隔
func WithRetryMinInterval(duration time.Duration) Option {
return func(c *config) {
if duration <= 0 {
duration = defaultRetryMinInterval
}
c.RetryMinInterval = duration
}
}
// WithRetryMaxInterval 設定最大重試間隔
func WithRetryMaxInterval(duration time.Duration) Option {
return func(c *config) {
if duration <= 0 {
duration = defaultRetryMaxInterval
}
c.RetryMaxInterval = duration
}
}
// WithReconnectInitialInterval 設定初始重連間隔
func WithReconnectInitialInterval(duration time.Duration) Option {
return func(c *config) {
if duration <= 0 {
duration = defaultReconnectInitialInterval
}
c.ReconnectInitialInterval = duration
}
}
// WithReconnectMaxInterval 設定最大重連間隔
func WithReconnectMaxInterval(duration time.Duration) Option {
return func(c *config) {
if duration <= 0 {
duration = defaultReconnectMaxInterval
}
c.ReconnectMaxInterval = duration
}
}
// WithCQLVersion 設定 CQL 版本
func WithCQLVersion(version string) Option {
return func(c *config) {
if version == "" {
version = defaultCqlVersion
}
c.CQLVersion = version
}
}

963
pkg/library/cassandra/option_test.go
View File

@ -1,963 +0,0 @@
package cassandra
import (
"testing"
"time"
"github.com/gocql/gocql"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestOption_DefaultConfig(t *testing.T) {
t.Run("defaultConfig should return valid config with all defaults", func(t *testing.T) {
cfg := defaultConfig()
require.NotNil(t, cfg)
assert.Equal(t, defaultPort, cfg.Port)
assert.Equal(t, defaultConsistency, cfg.Consistency)
assert.Equal(t, defaultTimeoutSec, cfg.ConnectTimeoutSec)
assert.Equal(t, defaultNumConns, cfg.NumConns)
assert.Equal(t, defaultMaxRetries, cfg.MaxRetries)
assert.Equal(t, defaultRetryMinInterval, cfg.RetryMinInterval)
assert.Equal(t, defaultRetryMaxInterval, cfg.RetryMaxInterval)
assert.Equal(t, defaultReconnectInitialInterval, cfg.ReconnectInitialInterval)
assert.Equal(t, defaultReconnectMaxInterval, cfg.ReconnectMaxInterval)
assert.Equal(t, defaultCqlVersion, cfg.CQLVersion)
assert.Empty(t, cfg.Hosts)
assert.Empty(t, cfg.Keyspace)
assert.Empty(t, cfg.Username)
assert.Empty(t, cfg.Password)
assert.False(t, cfg.UseAuth)
})
}
func TestWithHosts(t *testing.T) {
tests := []struct {
name string
hosts []string
expected []string
}{
{
name: "single host",
hosts: []string{"localhost"},
expected: []string{"localhost"},
},
{
name: "multiple hosts",
hosts: []string{"localhost", "127.0.0.1", "192.168.1.1"},
expected: []string{"localhost", "127.0.0.1", "192.168.1.1"},
},
{
name: "empty hosts",
hosts: []string{},
expected: []string{},
},
{
name: "host with port",
hosts: []string{"localhost:9042"},
expected: []string{"localhost:9042"},
},
{
name: "host with domain",
hosts: []string{"cassandra.example.com"},
expected: []string{"cassandra.example.com"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithHosts(tt.hosts...)
opt(cfg)
assert.Equal(t, tt.expected, cfg.Hosts)
})
}
}
func TestWithPort(t *testing.T) {
tests := []struct {
name string
port int
expected int
}{
{
name: "default port",
port: 9042,
expected: 9042,
},
{
name: "custom port",
port: 9043,
expected: 9043,
},
{
name: "zero port",
port: 0,
expected: 0,
},
{
name: "negative port",
port: -1,
expected: -1,
},
{
name: "high port number",
port: 65535,
expected: 65535,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithPort(tt.port)
opt(cfg)
assert.Equal(t, tt.expected, cfg.Port)
})
}
}
func TestWithKeyspace(t *testing.T) {
tests := []struct {
name string
keyspace string
expected string
}{
{
name: "valid keyspace",
keyspace: "my_keyspace",
expected: "my_keyspace",
},
{
name: "empty keyspace",
keyspace: "",
expected: "",
},
{
name: "keyspace with underscore",
keyspace: "test_keyspace_1",
expected: "test_keyspace_1",
},
{
name: "keyspace with numbers",
keyspace: "keyspace123",
expected: "keyspace123",
},
{
name: "long keyspace name",
keyspace: "very_long_keyspace_name_that_might_exist",
expected: "very_long_keyspace_name_that_might_exist",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithKeyspace(tt.keyspace)
opt(cfg)
assert.Equal(t, tt.expected, cfg.Keyspace)
})
}
}
func TestWithAuth(t *testing.T) {
tests := []struct {
name string
username string
password string
expectedUser string
expectedPass string
expectedUseAuth bool
}{
{
name: "valid credentials",
username: "admin",
password: "password123",
expectedUser: "admin",
expectedPass: "password123",
expectedUseAuth: true,
},
{
name: "empty username",
username: "",
password: "password",
expectedUser: "",
expectedPass: "password",
expectedUseAuth: true,
},
{
name: "empty password",
username: "admin",
password: "",
expectedUser: "admin",
expectedPass: "",
expectedUseAuth: true,
},
{
name: "both empty",
username: "",
password: "",
expectedUser: "",
expectedPass: "",
expectedUseAuth: true,
},
{
name: "special characters in password",
username: "user",
password: "p@ssw0rd!#$%",
expectedUser: "user",
expectedPass: "p@ssw0rd!#$%",
expectedUseAuth: true,
},
{
name: "long username and password",
username: "very_long_username_that_might_exist",
password: "very_long_password_that_might_exist",
expectedUser: "very_long_username_that_might_exist",
expectedPass: "very_long_password_that_might_exist",
expectedUseAuth: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithAuth(tt.username, tt.password)
opt(cfg)
assert.Equal(t, tt.expectedUser, cfg.Username)
assert.Equal(t, tt.expectedPass, cfg.Password)
assert.Equal(t, tt.expectedUseAuth, cfg.UseAuth)
})
}
}
func TestWithConsistency(t *testing.T) {
tests := []struct {
name string
consistency gocql.Consistency
expected gocql.Consistency
}{
{
name: "Quorum consistency",
consistency: gocql.Quorum,
expected: gocql.Quorum,
},
{
name: "One consistency",
consistency: gocql.One,
expected: gocql.One,
},
{
name: "All consistency",
consistency: gocql.All,
expected: gocql.All,
},
{
name: "Any consistency",
consistency: gocql.Any,
expected: gocql.Any,
},
{
name: "LocalQuorum consistency",
consistency: gocql.LocalQuorum,
expected: gocql.LocalQuorum,
},
{
name: "EachQuorum consistency",
consistency: gocql.EachQuorum,
expected: gocql.EachQuorum,
},
{
name: "LocalOne consistency",
consistency: gocql.LocalOne,
expected: gocql.LocalOne,
},
{
name: "Two consistency",
consistency: gocql.Two,
expected: gocql.Two,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithConsistency(tt.consistency)
opt(cfg)
assert.Equal(t, tt.expected, cfg.Consistency)
})
}
}
func TestWithConnectTimeoutSec(t *testing.T) {
tests := []struct {
name string
timeout int
expected int
}{
{
name: "valid timeout",
timeout: 10,
expected: 10,
},
{
name: "zero timeout should use default",
timeout: 0,
expected: defaultTimeoutSec,
},
{
name: "negative timeout should use default",
timeout: -1,
expected: defaultTimeoutSec,
},
{
name: "large timeout",
timeout: 300,
expected: 300,
},
{
name: "small timeout",
timeout: 1,
expected: 1,
},
{
name: "very large timeout",
timeout: 3600,
expected: 3600,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithConnectTimeoutSec(tt.timeout)
opt(cfg)
assert.Equal(t, tt.expected, cfg.ConnectTimeoutSec)
})
}
}
func TestWithNumConns(t *testing.T) {
tests := []struct {
name string
numConns int
expected int
}{
{
name: "valid numConns",
numConns: 10,
expected: 10,
},
{
name: "zero numConns should use default",
numConns: 0,
expected: defaultNumConns,
},
{
name: "negative numConns should use default",
numConns: -1,
expected: defaultNumConns,
},
{
name: "large numConns",
numConns: 100,
expected: 100,
},
{
name: "small numConns",
numConns: 1,
expected: 1,
},
{
name: "very large numConns",
numConns: 1000,
expected: 1000,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithNumConns(tt.numConns)
opt(cfg)
assert.Equal(t, tt.expected, cfg.NumConns)
})
}
}
func TestWithMaxRetries(t *testing.T) {
tests := []struct {
name string
maxRetries int
expected int
}{
{
name: "valid maxRetries",
maxRetries: 3,
expected: 3,
},
{
name: "zero maxRetries should use default",
maxRetries: 0,
expected: defaultMaxRetries,
},
{
name: "negative maxRetries should use default",
maxRetries: -1,
expected: defaultMaxRetries,
},
{
name: "large maxRetries",
maxRetries: 10,
expected: 10,
},
{
name: "small maxRetries",
maxRetries: 1,
expected: 1,
},
{
name: "very large maxRetries",
maxRetries: 100,
expected: 100,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithMaxRetries(tt.maxRetries)
opt(cfg)
assert.Equal(t, tt.expected, cfg.MaxRetries)
})
}
}
func TestWithRetryMinInterval(t *testing.T) {
tests := []struct {
name string
duration time.Duration
expected time.Duration
}{
{
name: "valid duration",
duration: 1 * time.Second,
expected: 1 * time.Second,
},
{
name: "zero duration should use default",
duration: 0,
expected: defaultRetryMinInterval,
},
{
name: "negative duration should use default",
duration: -1 * time.Second,
expected: defaultRetryMinInterval,
},
{
name: "milliseconds",
duration: 500 * time.Millisecond,
expected: 500 * time.Millisecond,
},
{
name: "minutes",
duration: 5 * time.Minute,
expected: 5 * time.Minute,
},
{
name: "hours",
duration: 1 * time.Hour,
expected: 1 * time.Hour,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithRetryMinInterval(tt.duration)
opt(cfg)
assert.Equal(t, tt.expected, cfg.RetryMinInterval)
})
}
}
func TestWithRetryMaxInterval(t *testing.T) {
tests := []struct {
name string
duration time.Duration
expected time.Duration
}{
{
name: "valid duration",
duration: 30 * time.Second,
expected: 30 * time.Second,
},
{
name: "zero duration should use default",
duration: 0,
expected: defaultRetryMaxInterval,
},
{
name: "negative duration should use default",
duration: -1 * time.Second,
expected: defaultRetryMaxInterval,
},
{
name: "milliseconds",
duration: 1000 * time.Millisecond,
expected: 1000 * time.Millisecond,
},
{
name: "minutes",
duration: 10 * time.Minute,
expected: 10 * time.Minute,
},
{
name: "hours",
duration: 2 * time.Hour,
expected: 2 * time.Hour,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithRetryMaxInterval(tt.duration)
opt(cfg)
assert.Equal(t, tt.expected, cfg.RetryMaxInterval)
})
}
}
func TestWithReconnectInitialInterval(t *testing.T) {
tests := []struct {
name string
duration time.Duration
expected time.Duration
}{
{
name: "valid duration",
duration: 1 * time.Second,
expected: 1 * time.Second,
},
{
name: "zero duration should use default",
duration: 0,
expected: defaultReconnectInitialInterval,
},
{
name: "negative duration should use default",
duration: -1 * time.Second,
expected: defaultReconnectInitialInterval,
},
{
name: "milliseconds",
duration: 500 * time.Millisecond,
expected: 500 * time.Millisecond,
},
{
name: "minutes",
duration: 2 * time.Minute,
expected: 2 * time.Minute,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithReconnectInitialInterval(tt.duration)
opt(cfg)
assert.Equal(t, tt.expected, cfg.ReconnectInitialInterval)
})
}
}
func TestWithReconnectMaxInterval(t *testing.T) {
tests := []struct {
name string
duration time.Duration
expected time.Duration
}{
{
name: "valid duration",
duration: 60 * time.Second,
expected: 60 * time.Second,
},
{
name: "zero duration should use default",
duration: 0,
expected: defaultReconnectMaxInterval,
},
{
name: "negative duration should use default",
duration: -1 * time.Second,
expected: defaultReconnectMaxInterval,
},
{
name: "milliseconds",
duration: 5000 * time.Millisecond,
expected: 5000 * time.Millisecond,
},
{
name: "minutes",
duration: 5 * time.Minute,
expected: 5 * time.Minute,
},
{
name: "hours",
duration: 1 * time.Hour,
expected: 1 * time.Hour,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithReconnectMaxInterval(tt.duration)
opt(cfg)
assert.Equal(t, tt.expected, cfg.ReconnectMaxInterval)
})
}
}
func TestWithCQLVersion(t *testing.T) {
tests := []struct {
name string
version string
expected string
}{
{
name: "valid version",
version: "3.0.0",
expected: "3.0.0",
},
{
name: "empty version should use default",
version: "",
expected: defaultCqlVersion,
},
{
name: "version 3.1.0",
version: "3.1.0",
expected: "3.1.0",
},
{
name: "version 3.4.0",
version: "3.4.0",
expected: "3.4.0",
},
{
name: "version 4.0.0",
version: "4.0.0",
expected: "4.0.0",
},
{
name: "version with build",
version: "3.0.0-beta",
expected: "3.0.0-beta",
},
{
name: "version with snapshot",
version: "3.0.0-SNAPSHOT",
expected: "3.0.0-SNAPSHOT",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
opt := WithCQLVersion(tt.version)
opt(cfg)
assert.Equal(t, tt.expected, cfg.CQLVersion)
})
}
}
func TestOption_Combination(t *testing.T) {
tests := []struct {
name string
opts []Option
validate func(*testing.T, *config)
}{
{
name: "all options",
opts: []Option{
WithHosts("localhost", "127.0.0.1"),
WithPort(9042),
WithKeyspace("test_keyspace"),
WithAuth("user", "pass"),
WithConsistency(gocql.Quorum),
WithConnectTimeoutSec(10),
WithNumConns(10),
WithMaxRetries(3),
WithRetryMinInterval(1 * time.Second),
WithRetryMaxInterval(30 * time.Second),
WithReconnectInitialInterval(1 * time.Second),
WithReconnectMaxInterval(60 * time.Second),
WithCQLVersion("3.0.0"),
},
validate: func(t *testing.T, c *config) {
assert.Equal(t, []string{"localhost", "127.0.0.1"}, c.Hosts)
assert.Equal(t, 9042, c.Port)
assert.Equal(t, "test_keyspace", c.Keyspace)
assert.Equal(t, "user", c.Username)
assert.Equal(t, "pass", c.Password)
assert.True(t, c.UseAuth)
assert.Equal(t, gocql.Quorum, c.Consistency)
assert.Equal(t, 10, c.ConnectTimeoutSec)
assert.Equal(t, 10, c.NumConns)
assert.Equal(t, 3, c.MaxRetries)
assert.Equal(t, 1*time.Second, c.RetryMinInterval)
assert.Equal(t, 30*time.Second, c.RetryMaxInterval)
assert.Equal(t, 1*time.Second, c.ReconnectInitialInterval)
assert.Equal(t, 60*time.Second, c.ReconnectMaxInterval)
assert.Equal(t, "3.0.0", c.CQLVersion)
},
},
{
name: "minimal options",
opts: []Option{
WithHosts("localhost"),
},
validate: func(t *testing.T, c *config) {
assert.Equal(t, []string{"localhost"}, c.Hosts)
// 其他應該使用預設值
assert.Equal(t, defaultPort, c.Port)
assert.Equal(t, defaultConsistency, c.Consistency)
},
},
{
name: "options with zero values should use defaults",
opts: []Option{
WithHosts("localhost"),
WithConnectTimeoutSec(0),
WithNumConns(0),
WithMaxRetries(0),
WithRetryMinInterval(0),
WithRetryMaxInterval(0),
WithReconnectInitialInterval(0),
WithReconnectMaxInterval(0),
WithCQLVersion(""),
},
validate: func(t *testing.T, c *config) {
assert.Equal(t, []string{"localhost"}, c.Hosts)
assert.Equal(t, defaultTimeoutSec, c.ConnectTimeoutSec)
assert.Equal(t, defaultNumConns, c.NumConns)
assert.Equal(t, defaultMaxRetries, c.MaxRetries)
assert.Equal(t, defaultRetryMinInterval, c.RetryMinInterval)
assert.Equal(t, defaultRetryMaxInterval, c.RetryMaxInterval)
assert.Equal(t, defaultReconnectInitialInterval, c.ReconnectInitialInterval)
assert.Equal(t, defaultReconnectMaxInterval, c.ReconnectMaxInterval)
assert.Equal(t, defaultCqlVersion, c.CQLVersion)
},
},
{
name: "options with negative values should use defaults",
opts: []Option{
WithHosts("localhost"),
WithConnectTimeoutSec(-1),
WithNumConns(-1),
WithMaxRetries(-1),
WithRetryMinInterval(-1 * time.Second),
WithRetryMaxInterval(-1 * time.Second),
WithReconnectInitialInterval(-1 * time.Second),
WithReconnectMaxInterval(-1 * time.Second),
},
validate: func(t *testing.T, c *config) {
assert.Equal(t, []string{"localhost"}, c.Hosts)
assert.Equal(t, defaultTimeoutSec, c.ConnectTimeoutSec)
assert.Equal(t, defaultNumConns, c.NumConns)
assert.Equal(t, defaultMaxRetries, c.MaxRetries)
assert.Equal(t, defaultRetryMinInterval, c.RetryMinInterval)
assert.Equal(t, defaultRetryMaxInterval, c.RetryMaxInterval)
assert.Equal(t, defaultReconnectInitialInterval, c.ReconnectInitialInterval)
assert.Equal(t, defaultReconnectMaxInterval, c.ReconnectMaxInterval)
},
},
{
name: "multiple options applied in sequence",
opts: []Option{
WithHosts("host1"),
WithHosts("host2", "host3"), // 應該覆蓋
WithPort(9042),
WithPort(9043), // 應該覆蓋
},
validate: func(t *testing.T, c *config) {
assert.Equal(t, []string{"host2", "host3"}, c.Hosts)
assert.Equal(t, 9043, c.Port)
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
for _, opt := range tt.opts {
opt(cfg)
}
tt.validate(t, cfg)
})
}
}
func TestOption_Type(t *testing.T) {
t.Run("all options should return Option type", func(t *testing.T) {
var opt Option
opt = WithHosts("localhost")
assert.NotNil(t, opt)
opt = WithPort(9042)
assert.NotNil(t, opt)
opt = WithKeyspace("test")
assert.NotNil(t, opt)
opt = WithAuth("user", "pass")
assert.NotNil(t, opt)
opt = WithConsistency(gocql.Quorum)
assert.NotNil(t, opt)
opt = WithConnectTimeoutSec(10)
assert.NotNil(t, opt)
opt = WithNumConns(10)
assert.NotNil(t, opt)
opt = WithMaxRetries(3)
assert.NotNil(t, opt)
opt = WithRetryMinInterval(1 * time.Second)
assert.NotNil(t, opt)
opt = WithRetryMaxInterval(30 * time.Second)
assert.NotNil(t, opt)
opt = WithReconnectInitialInterval(1 * time.Second)
assert.NotNil(t, opt)
opt = WithReconnectMaxInterval(60 * time.Second)
assert.NotNil(t, opt)
opt = WithCQLVersion("3.0.0")
assert.NotNil(t, opt)
})
}
func TestOption_EdgeCases(t *testing.T) {
t.Run("empty option slice", func(t *testing.T) {
cfg := defaultConfig()
opts := []Option{}
for _, opt := range opts {
opt(cfg)
}
// 應該保持預設值
assert.Equal(t, defaultPort, cfg.Port)
assert.Equal(t, defaultConsistency, cfg.Consistency)
})
t.Run("zero value option function", func(t *testing.T) {
cfg := defaultConfig()
var opt Option
// 零值的 Option 是 nil，調用會 panic，所以不應該調用
// 這裡只是驗證零值不會影響配置
_ = opt
// 應該保持預設值
assert.Equal(t, defaultPort, cfg.Port)
})
t.Run("very long strings", func(t *testing.T) {
cfg := defaultConfig()
longString := string(make([]byte, 10000))
WithKeyspace(longString)(cfg)
assert.Equal(t, longString, cfg.Keyspace)
WithAuth(longString, longString)(cfg)
assert.Equal(t, longString, cfg.Username)
assert.Equal(t, longString, cfg.Password)
})
t.Run("special characters in strings", func(t *testing.T) {
cfg := defaultConfig()
specialChars := "!@#$%^&*()_+-=[]{}|;:,.<>?"
WithKeyspace(specialChars)(cfg)
assert.Equal(t, specialChars, cfg.Keyspace)
WithAuth(specialChars, specialChars)(cfg)
assert.Equal(t, specialChars, cfg.Username)
assert.Equal(t, specialChars, cfg.Password)
})
}
func TestOption_RealWorldScenarios(t *testing.T) {
tests := []struct {
name string
scenario string
opts []Option
validate func(*testing.T, *config)
}{
{
name: "production-like configuration",
scenario: "typical production setup",
opts: []Option{
WithHosts("cassandra1.example.com", "cassandra2.example.com", "cassandra3.example.com"),
WithPort(9042),
WithKeyspace("production_keyspace"),
WithAuth("prod_user", "secure_password"),
WithConsistency(gocql.Quorum),
WithConnectTimeoutSec(30),
WithNumConns(50),
WithMaxRetries(5),
},
validate: func(t *testing.T, c *config) {
assert.Len(t, c.Hosts, 3)
assert.Equal(t, 9042, c.Port)
assert.Equal(t, "production_keyspace", c.Keyspace)
assert.True(t, c.UseAuth)
assert.Equal(t, gocql.Quorum, c.Consistency)
assert.Equal(t, 30, c.ConnectTimeoutSec)
assert.Equal(t, 50, c.NumConns)
assert.Equal(t, 5, c.MaxRetries)
},
},
{
name: "development configuration",
scenario: "local development setup",
opts: []Option{
WithHosts("localhost"),
WithKeyspace("dev_keyspace"),
},
validate: func(t *testing.T, c *config) {
assert.Equal(t, []string{"localhost"}, c.Hosts)
assert.Equal(t, "dev_keyspace", c.Keyspace)
assert.False(t, c.UseAuth)
},
},
{
name: "high availability configuration",
scenario: "HA setup with multiple hosts",
opts: []Option{
WithHosts("node1", "node2", "node3", "node4", "node5"),
WithConsistency(gocql.All),
WithMaxRetries(10),
},
validate: func(t *testing.T, c *config) {
assert.Len(t, c.Hosts, 5)
assert.Equal(t, gocql.All, c.Consistency)
assert.Equal(t, 10, c.MaxRetries)
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cfg := defaultConfig()
for _, opt := range tt.opts {
opt(cfg)
}
tt.validate(t, cfg)
})
}
}

226
pkg/library/cassandra/query.go
View File

@ -1,226 +0,0 @@
package cassandra
import (
"context"
"fmt"
"github.com/gocql/gocql"
"github.com/scylladb/gocqlx/v2/qb"
)
// Condition 定義查詢條件介面
type Condition interface {
Build() (qb.Cmp, map[string]any)
}
// Eq 等於條件
func Eq(column string, value any) Condition {
return &eqCondition{column: column, value: value}
}
type eqCondition struct {
column string
value any
}
func (c *eqCondition) Build() (qb.Cmp, map[string]any) {
return qb.Eq(c.column), map[string]any{c.column: c.value}
}
// In IN 條件
func In(column string, values []any) Condition {
return &inCondition{column: column, values: values}
}
type inCondition struct {
column string
values []any
}
func (c *inCondition) Build() (qb.Cmp, map[string]any) {
return qb.In(c.column), map[string]any{c.column: c.values}
}
// Gt 大於條件
func Gt(column string, value any) Condition {
return &gtCondition{column: column, value: value}
}
type gtCondition struct {
column string
value any
}
func (c *gtCondition) Build() (qb.Cmp, map[string]any) {
return qb.Gt(c.column), map[string]any{c.column: c.value}
}
// Lt 小於條件
func Lt(column string, value any) Condition {
return &ltCondition{column: column, value: value}
}
type ltCondition struct {
column string
value any
}
func (c *ltCondition) Build() (qb.Cmp, map[string]any) {
return qb.Lt(c.column), map[string]any{c.column: c.value}
}
// QueryBuilder 定義查詢構建器介面
type QueryBuilder[T Table] interface {
Where(condition Condition) QueryBuilder[T]
OrderBy(column string, order Order) QueryBuilder[T]
Limit(n int) QueryBuilder[T]
Select(columns ...string) QueryBuilder[T]
Scan(ctx context.Context, dest *[]T) error
One(ctx context.Context) (T, error)
Count(ctx context.Context) (int64, error)
}
// queryBuilder 是 QueryBuilder 的具體實作
type queryBuilder[T Table] struct {
repo *repository[T]
conditions []Condition
orders []orderBy
limit int
columns []string
}
type orderBy struct {
column string
order Order
}
// newQueryBuilder 創建新的查詢構建器
func newQueryBuilder[T Table](repo *repository[T]) QueryBuilder[T] {
return &queryBuilder[T]{
repo: repo,
}
}
// Where 添加 WHERE 條件
func (q *queryBuilder[T]) Where(condition Condition) QueryBuilder[T] {
q.conditions = append(q.conditions, condition)
return q
}
// OrderBy 添加排序
func (q *queryBuilder[T]) OrderBy(column string, order Order) QueryBuilder[T] {
q.orders = append(q.orders, orderBy{column: column, order: order})
return q
}
// Limit 設置限制
func (q *queryBuilder[T]) Limit(n int) QueryBuilder[T] {
q.limit = n
return q
}
// Select 指定要查詢的欄位
func (q *queryBuilder[T]) Select(columns ...string) QueryBuilder[T] {
q.columns = append(q.columns, columns...)
return q
}
// Scan 執行查詢並將結果掃描到 dest
func (q *queryBuilder[T]) Scan(ctx context.Context, dest *[]T) error {
if dest == nil {
return ErrInvalidInput.WithTable(q.repo.table).WithError(
fmt.Errorf("destination cannot be nil"),
)
}
builder := qb.Select(q.repo.table)
// 添加欄位
if len(q.columns) > 0 {
builder = builder.Columns(q.columns...)
} else {
builder = builder.Columns(q.repo.metadata.Columns...)
}
// 添加條件
bindMap := make(map[string]any)
var cmps []qb.Cmp
for _, cond := range q.conditions {
cmp, binds := cond.Build()
cmps = append(cmps, cmp)
for k, v := range binds {
bindMap[k] = v
}
}
if len(cmps) > 0 {
builder = builder.Where(cmps...)
}
// 添加排序
for _, o := range q.orders {
order := qb.ASC
if o.order == DESC {
order = qb.DESC
}
builder = builder.OrderBy(o.column, order)
}
// 添加限制
if q.limit > 0 {
builder = builder.Limit(uint(q.limit))
}
stmt, names := builder.ToCql()
query := q.repo.db.withContextAndTimestamp(ctx,
q.repo.db.session.Query(stmt, names).BindMap(bindMap))
return query.SelectRelease(dest)
}
// One 執行查詢並返回單筆結果
func (q *queryBuilder[T]) One(ctx context.Context) (T, error) {
var zero T
q.limit = 1
var results []T
if err := q.Scan(ctx, &results); err != nil {
return zero, err
}
if len(results) == 0 {
return zero, ErrNotFound.WithTable(q.repo.table)
}
return results[0], nil
}
// Count 計算符合條件的記錄數
func (q *queryBuilder[T]) Count(ctx context.Context) (int64, error) {
builder := qb.Select(q.repo.table).Columns("COUNT(*)")
// 添加條件
bindMap := make(map[string]any)
var cmps []qb.Cmp
for _, cond := range q.conditions {
cmp, binds := cond.Build()
cmps = append(cmps, cmp)
for k, v := range binds {
bindMap[k] = v
}
}
if len(cmps) > 0 {
builder = builder.Where(cmps...)
}
stmt, names := builder.ToCql()
query := q.repo.db.withContextAndTimestamp(ctx,
q.repo.db.session.Query(stmt, names).BindMap(bindMap))
var count int64
err := query.GetRelease(&count)
if err == gocql.ErrNotFound {
return 0, nil // COUNT 查詢不會返回 ErrNotFound，但為了安全起見
}
return count, err
}

520
pkg/library/cassandra/query_test.go
View File

@ -1,520 +0,0 @@
package cassandra
import (
"testing"
"github.com/scylladb/gocqlx/v2/qb"
"github.com/stretchr/testify/assert"
)
func TestEq(t *testing.T) {
tests := []struct {
name string
column string
value any
validate func(*testing.T, Condition)
}{
{
name: "string value",
column: "name",
value: "Alice",
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, "Alice", binds["name"])
},
},
{
name: "int value",
column: "age",
value: 25,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, 25, binds["age"])
},
},
{
name: "nil value",
column: "description",
value: nil,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Nil(t, binds["description"])
},
},
{
name: "empty string",
column: "email",
value: "",
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, "", binds["email"])
},
},
{
name: "boolean value",
column: "active",
value: true,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, true, binds["active"])
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cond := Eq(tt.column, tt.value)
assert.NotNil(t, cond)
tt.validate(t, cond)
})
}
}
func TestIn(t *testing.T) {
tests := []struct {
name string
column string
values []any
validate func(*testing.T, Condition)
}{
{
name: "string values",
column: "status",
values: []any{"active", "pending", "completed"},
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, []any{"active", "pending", "completed"}, binds["status"])
},
},
{
name: "int values",
column: "ids",
values: []any{1, 2, 3, 4, 5},
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, []any{1, 2, 3, 4, 5}, binds["ids"])
},
},
{
name: "empty slice",
column: "tags",
values: []any{},
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, []any{}, binds["tags"])
},
},
{
name: "single value",
column: "id",
values: []any{1},
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, []any{1}, binds["id"])
},
},
{
name: "mixed types",
column: "values",
values: []any{"string", 123, true},
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, []any{"string", 123, true}, binds["values"])
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cond := In(tt.column, tt.values)
assert.NotNil(t, cond)
tt.validate(t, cond)
})
}
}
func TestGt(t *testing.T) {
tests := []struct {
name string
column string
value any
validate func(*testing.T, Condition)
}{
{
name: "int value",
column: "age",
value: 18,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, 18, binds["age"])
},
},
{
name: "float value",
column: "price",
value: 99.99,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, 99.99, binds["price"])
},
},
{
name: "zero value",
column: "count",
value: 0,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, 0, binds["count"])
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cond := Gt(tt.column, tt.value)
assert.NotNil(t, cond)
tt.validate(t, cond)
})
}
}
func TestLt(t *testing.T) {
tests := []struct {
name string
column string
value any
validate func(*testing.T, Condition)
}{
{
name: "int value",
column: "age",
value: 65,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, 65, binds["age"])
},
},
{
name: "float value",
column: "price",
value: 199.99,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, 199.99, binds["price"])
},
},
{
name: "negative value",
column: "balance",
value: -100,
validate: func(t *testing.T, cond Condition) {
cmp, binds := cond.Build()
assert.NotNil(t, cmp)
assert.Equal(t, -100, binds["balance"])
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cond := Lt(tt.column, tt.value)
assert.NotNil(t, cond)
tt.validate(t, cond)
})
}
}
func TestCondition_Build(t *testing.T) {
tests := []struct {
name string
cond Condition
validate func(*testing.T, qb.Cmp, map[string]any)
}{
{
name: "Eq condition",
cond: Eq("name", "test"),
validate: func(t *testing.T, cmp qb.Cmp, binds map[string]any) {
assert.NotNil(t, cmp)
assert.Equal(t, "test", binds["name"])
},
},
{
name: "In condition",
cond: In("ids", []any{1, 2, 3}),
validate: func(t *testing.T, cmp qb.Cmp, binds map[string]any) {
assert.NotNil(t, cmp)
assert.Equal(t, []any{1, 2, 3}, binds["ids"])
},
},
{
name: "Gt condition",
cond: Gt("age", 18),
validate: func(t *testing.T, cmp qb.Cmp, binds map[string]any) {
assert.NotNil(t, cmp)
assert.Equal(t, 18, binds["age"])
},
},
{
name: "Lt condition",
cond: Lt("price", 100),
validate: func(t *testing.T, cmp qb.Cmp, binds map[string]any) {
assert.NotNil(t, cmp)
assert.Equal(t, 100, binds["price"])
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cmp, binds := tt.cond.Build()
tt.validate(t, cmp, binds)
})
}
}
func TestQueryBuilder_Where(t *testing.T) {
tests := []struct {
name string
condition Condition
validate func(*testing.T, *queryBuilder[testUser])
}{
{
name: "single condition",
condition: Eq("name", "Alice"),
validate: func(t *testing.T, qb *queryBuilder[testUser]) {
assert.Len(t, qb.conditions, 1)
},
},
{
name: "multiple conditions",
condition: In("status", []any{"active", "pending"}),
validate: func(t *testing.T, qb *queryBuilder[testUser]) {
// 添加多個條件
cond := In("status", []any{"active", "pending"})
qb.Where(Eq("name", "test"))
qb.Where(cond)
assert.Len(t, qb.conditions, 2)
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 repository，但我們可以測試鏈式調用
// 實際的執行需要資料庫連接
_ = tt
})
}
}
func TestQueryBuilder_OrderBy(t *testing.T) {
tests := []struct {
name string
column string
order Order
validate func(*testing.T, *queryBuilder[testUser])
}{
{
name: "ASC order",
column: "created_at",
order: ASC,
validate: func(t *testing.T, qb *queryBuilder[testUser]) {
assert.Len(t, qb.orders, 1)
assert.Equal(t, "created_at", qb.orders[0].column)
assert.Equal(t, ASC, qb.orders[0].order)
},
},
{
name: "DESC order",
column: "updated_at",
order: DESC,
validate: func(t *testing.T, qb *queryBuilder[testUser]) {
assert.Len(t, qb.orders, 1)
assert.Equal(t, "updated_at", qb.orders[0].column)
assert.Equal(t, DESC, qb.orders[0].order)
},
},
{
name: "multiple orders",
column: "name",
order: ASC,
validate: func(t *testing.T, qb *queryBuilder[testUser]) {
qb.OrderBy("created_at", DESC)
qb.OrderBy("name", ASC)
assert.Len(t, qb.orders, 2)
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 repository
_ = tt
})
}
}
func TestQueryBuilder_Limit(t *testing.T) {
tests := []struct {
name string
limit int
expected int
}{
{
name: "positive limit",
limit: 10,
expected: 10,
},
{
name: "zero limit",
limit: 0,
expected: 0,
},
{
name: "large limit",
limit: 1000,
expected: 1000,
},
{
name: "negative limit",
limit: -1,
expected: -1,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 repository
_ = tt
})
}
}
func TestQueryBuilder_Select(t *testing.T) {
tests := []struct {
name string
columns []string
expected int
}{
{
name: "single column",
columns: []string{"name"},
expected: 1,
},
{
name: "multiple columns",
columns: []string{"name", "email", "age"},
expected: 3,
},
{
name: "empty columns",
columns: []string{},
expected: 0,
},
{
name: "duplicate columns",
columns: []string{"name", "name"},
expected: 2,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 repository
_ = tt
})
}
}
func TestQueryBuilder_Chaining(t *testing.T) {
t.Run("chain multiple methods", func(t *testing.T) {
// 注意：這需要一個有效的 repository
// 實際的執行需要資料庫連接
// 這裡只是展示測試結構
})
}
func TestQueryBuilder_Scan_ErrorCases(t *testing.T) {
tests := []struct {
name string
description string
}{
{
name: "nil destination",
description: "should return error when destination is nil",
},
{
name: "invalid query",
description: "should return error when query is invalid",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}
func TestQueryBuilder_One_ErrorCases(t *testing.T) {
tests := []struct {
name string
description string
}{
{
name: "no results",
description: "should return ErrNotFound when no results found",
},
{
name: "query error",
description: "should return error when query fails",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}
func TestQueryBuilder_Count_ErrorCases(t *testing.T) {
tests := []struct {
name string
description string
}{
{
name: "query error",
description: "should return error when query fails",
},
{
name: "ErrNotFound should return 0",
description: "should return 0 when ErrNotFound",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}

265
pkg/library/cassandra/repository.go
View File

@ -1,265 +0,0 @@
package cassandra
import (
"context"
"errors"
"fmt"
"reflect"
"github.com/gocql/gocql"
"github.com/scylladb/gocqlx/v2"
"github.com/scylladb/gocqlx/v2/qb"
"github.com/scylladb/gocqlx/v2/table"
)
// Repository 定義資料存取介面（小介面，符合 M3）
type Repository[T Table] interface {
Insert(ctx context.Context, doc T) error
Get(ctx context.Context, pk any) (T, error)
Update(ctx context.Context, doc T) error
Delete(ctx context.Context, pk any) error
InsertMany(ctx context.Context, docs []T) error
Query() QueryBuilder[T]
TryLock(ctx context.Context, doc T, opts ...LockOption) error
UnLock(ctx context.Context, doc T) error
}
// repository 是 Repository 的具體實作
type repository[T Table] struct {
db *DB
keyspace string
table string
metadata table.Metadata
}
// NewRepository 獲取指定類型的 Repository
// keyspace 如果為空，使用預設 keyspace
func NewRepository[T Table](db *DB, keyspace string) (Repository[T], error) {
if keyspace == "" {
keyspace = db.defaultKeyspace
}
var zero T
metadata, err := generateMetadata(zero, keyspace)
if err != nil {
return nil, fmt.Errorf("failed to generate metadata: %w", err)
}
return &repository[T]{
db: db,
keyspace: keyspace,
table: metadata.Name,
metadata: metadata,
}, nil
}
// Insert 插入單筆資料
func (r *repository[T]) Insert(ctx context.Context, doc T) error {
t := table.New(r.metadata)
q := r.db.withContextAndTimestamp(ctx,
r.db.session.Query(t.Insert()).BindStruct(doc))
return q.ExecRelease()
}
// Get 根據主鍵查詢單筆資料
// 注意：pk 必須是完整的 Primary Key（包含所有 Partition Key 和 Clustering Key）
// 如果主鍵是多欄位，需要傳入包含所有主鍵欄位的 struct
// pk 可以是：string, int, int64, gocql.UUID, []byte 或包含主鍵欄位的 struct
func (r *repository[T]) Get(ctx context.Context, pk any) (T, error) {
var zero T
t := table.New(r.metadata)
// 使用 table.Get() 方法，它會自動根據 metadata 構建主鍵查詢
// 如果 pk 是 struct，使用 BindStruct；否則使用 Bind
var q *gocqlx.Queryx
if reflect.TypeOf(pk).Kind() == reflect.Struct {
q = r.db.withContextAndTimestamp(ctx,
r.db.session.Query(t.Get()).BindStruct(pk))
} else {
// 單一主鍵欄位的情況
// 注意：這只適用於單一 Partition Key 且無 Clustering Key 的情況
if len(r.metadata.PartKey) != 1 || len(r.metadata.SortKey) > 0 {
return zero, ErrInvalidInput.WithTable(r.table).WithError(
fmt.Errorf("single value primary key only supported for single partition key without clustering key"),
)
}
q = r.db.withContextAndTimestamp(ctx,
r.db.session.Query(t.Get()).Bind(pk))
}
var result T
err := q.GetRelease(&result)
if errors.Is(err, gocql.ErrNotFound) {
return zero, ErrNotFound.WithTable(r.table)
}
if err != nil {
return zero, ErrInvalidInput.WithTable(r.table).WithError(err)
}
return result, nil
}
// Update 更新資料（只更新非零值欄位）
func (r *repository[T]) Update(ctx context.Context, doc T) error {
return r.updateSelective(ctx, doc, false)
}
// UpdateAll 更新所有欄位（包括零值）
func (r *repository[T]) UpdateAll(ctx context.Context, doc T) error {
return r.updateSelective(ctx, doc, true)
}
// updateSelective 選擇性更新
func (r *repository[T]) updateSelective(ctx context.Context, doc T, includeZero bool) error {
// 重用現有的 BuildUpdateFields 邏輯
// 由於在不同套件，我們需要重新實作或導入
fields, err := r.buildUpdateFields(doc, includeZero)
if err != nil {
return err
}
stmt, names := r.buildUpdateStatement(fields.setCols, fields.whereCols)
setVals := append(fields.setVals, fields.whereVals...)
q := r.db.withContextAndTimestamp(ctx,
r.db.session.Query(stmt, names).Bind(setVals...))
return q.ExecRelease()
}
// Delete 刪除資料
// pk 可以是：string, int, int64, gocql.UUID, []byte 或包含主鍵欄位的 struct
func (r *repository[T]) Delete(ctx context.Context, pk any) error {
t := table.New(r.metadata)
stmt, names := t.Delete()
q := r.db.withContextAndTimestamp(ctx,
r.db.session.Query(stmt, names).Bind(pk))
return q.ExecRelease()
}
// InsertMany 批次插入資料
func (r *repository[T]) InsertMany(ctx context.Context, docs []T) error {
if len(docs) == 0 {
return nil
}
// 使用 Batch 操作
batch := r.db.session.NewBatch(gocql.LoggedBatch).WithContext(ctx)
t := table.New(r.metadata)
stmt, names := t.Insert()
for _, doc := range docs {
// 在 v2 中，需要手動提取值
v := reflect.ValueOf(doc)
if v.Kind() == reflect.Ptr {
v = v.Elem()
}
values := make([]interface{}, len(names))
for i, name := range names {
// 根據 metadata 找到對應的欄位
for j, col := range r.metadata.Columns {
if col == name {
fieldValue := v.Field(j)
values[i] = fieldValue.Interface()
break
}
}
}
batch.Query(stmt, values...)
}
return r.db.session.ExecuteBatch(batch)
}
// Query 返回查詢構建器
func (r *repository[T]) Query() QueryBuilder[T] {
return newQueryBuilder(r)
}
// updateFields 包含更新操作所需的欄位資訊
type updateFields struct {
setCols []string
setVals []any
whereCols []string
whereVals []any
}
// buildUpdateFields 從 document 中提取更新所需的欄位資訊
func (r *repository[T]) buildUpdateFields(doc T, includeZero bool) (*updateFields, error) {
v := reflect.ValueOf(doc)
if v.Kind() == reflect.Ptr {
v = v.Elem()
}
typ := v.Type()
setCols := make([]string, 0)
setVals := make([]any, 0)
whereCols := make([]string, 0)
whereVals := make([]any, 0)
for i := 0; i < typ.NumField(); i++ {
field := typ.Field(i)
tag := field.Tag.Get(DBFiledName)
if tag == "" || tag == "-" {
continue
}
val := v.Field(i)
if !val.IsValid() {
continue
}
// 主鍵欄位放入 WHERE 條件
if contains(r.metadata.PartKey, tag) || contains(r.metadata.SortKey, tag) {
whereCols = append(whereCols, tag)
whereVals = append(whereVals, val.Interface())
continue
}
// 根據 includeZero 決定是否包含零值欄位
if !includeZero && isZero(val) {
continue
}
setCols = append(setCols, tag)
setVals = append(setVals, val.Interface())
}
if len(setCols) == 0 {
return nil, ErrNoFieldsToUpdate.WithTable(r.table)
}
return &updateFields{
setCols: setCols,
setVals: setVals,
whereCols: whereCols,
whereVals: whereVals,
}, nil
}
// buildUpdateStatement 構建 UPDATE CQL 語句
func (r *repository[T]) buildUpdateStatement(setCols, whereCols []string) (string, []string) {
builder := qb.Update(r.table).Set(setCols...)
for _, col := range whereCols {
builder = builder.Where(qb.Eq(col))
}
return builder.ToCql()
}
// contains 判斷字串是否存在於 slice 中
func contains(list []string, target string) bool {
for _, item := range list {
if item == target {
return true
}
}
return false
}
// isZero 判斷欄位是否為零值或 nil
func isZero(v reflect.Value) bool {
switch v.Kind() {
case reflect.Ptr, reflect.Interface, reflect.Map, reflect.Slice:
return v.IsNil()
default:
return reflect.DeepEqual(v.Interface(), reflect.Zero(v.Type()).Interface())
}
}

547
pkg/library/cassandra/repository_test.go
View File

@ -1,547 +0,0 @@
package cassandra
import (
"reflect"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestContains(t *testing.T) {
tests := []struct {
name string
list []string
target string
want bool
}{
{
name: "target exists in list",
list: []string{"a", "b", "c"},
target: "b",
want: true,
},
{
name: "target at beginning",
list: []string{"a", "b", "c"},
target: "a",
want: true,
},
{
name: "target at end",
list: []string{"a", "b", "c"},
target: "c",
want: true,
},
{
name: "target not in list",
list: []string{"a", "b", "c"},
target: "d",
want: false,
},
{
name: "empty list",
list: []string{},
target: "a",
want: false,
},
{
name: "empty target",
list: []string{"a", "b", "c"},
target: "",
want: false,
},
{
name: "target in single element list",
list: []string{"a"},
target: "a",
want: true,
},
{
name: "case sensitive",
list: []string{"A", "B", "C"},
target: "a",
want: false,
},
{
name: "duplicate values",
list: []string{"a", "b", "a", "c"},
target: "a",
want: true,
},
{
name: "long list",
list: []string{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j"},
target: "j",
want: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := contains(tt.list, tt.target)
assert.Equal(t, tt.want, result)
})
}
}
func TestIsZero(t *testing.T) {
tests := []struct {
name string
value any
expected bool
skip bool
}{
{
name: "nil pointer",
value: (*string)(nil),
expected: true,
skip: false,
},
{
name: "non-nil pointer",
value: stringPtr("test"),
expected: false,
skip: false,
},
{
name: "nil slice",
value: []string(nil),
expected: true,
skip: false,
},
{
name: "empty slice",
value: []string{},
expected: false, // 空 slice 不是 nil
skip: false,
},
{
name: "nil map",
value: map[string]int(nil),
expected: true,
skip: false,
},
{
name: "empty map",
value: map[string]int{},
expected: false, // 空 map 不是 nil
skip: false,
},
{
name: "zero int",
value: 0,
expected: true,
skip: false,
},
{
name: "non-zero int",
value: 42,
expected: false,
skip: false,
},
{
name: "zero int64",
value: int64(0),
expected: true,
skip: false,
},
{
name: "non-zero int64",
value: int64(42),
expected: false,
skip: false,
},
{
name: "zero float64",
value: 0.0,
expected: true,
skip: false,
},
{
name: "non-zero float64",
value: 3.14,
expected: false,
skip: false,
},
{
name: "empty string",
value: "",
expected: true,
skip: false,
},
{
name: "non-empty string",
value: "test",
expected: false,
skip: false,
},
{
name: "false bool",
value: false,
expected: true,
skip: false,
},
{
name: "true bool",
value: true,
expected: false,
skip: false,
},
{
name: "struct with zero values",
value: testUser{},
expected: true, // 所有欄位都是零值，應該返回 true
skip: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.skip {
t.Skip("Skipping test")
return
}
// 使用 reflect.ValueOf 來獲取 reflect.Value
v := reflect.ValueOf(tt.value)
// 檢查是否為零值（nil interface 會導致 zero Value）
if !v.IsValid() {
// 對於 nil interface，直接返回 true
assert.True(t, tt.expected)
return
}
result := isZero(v)
assert.Equal(t, tt.expected, result)
})
}
}
func TestNewRepository(t *testing.T) {
tests := []struct {
name string
keyspace string
wantErr bool
validate func(*testing.T, Repository[testUser], *DB)
}{
{
name: "valid keyspace",
keyspace: "test_keyspace",
wantErr: false,
validate: func(t *testing.T, repo Repository[testUser], db *DB) {
assert.NotNil(t, repo)
},
},
{
name: "empty keyspace uses default",
keyspace: "",
wantErr: false,
validate: func(t *testing.T, repo Repository[testUser], db *DB) {
assert.NotNil(t, repo)
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestRepository_Insert(t *testing.T) {
tests := []struct {
name string
description string
}{
{
name: "successful insert",
description: "should insert document successfully",
},
{
name: "duplicate key",
description: "should return error on duplicate key",
},
{
name: "invalid document",
description: "should return error for invalid document",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}
func TestRepository_Get(t *testing.T) {
tests := []struct {
name string
pk any
description string
wantErr bool
}{
{
name: "found with string key",
pk: "test-id",
description: "should return document when found",
wantErr: false,
},
{
name: "not found",
pk: "non-existent",
description: "should return ErrNotFound when not found",
wantErr: true,
},
{
name: "invalid primary key structure",
pk: "single-key",
description: "should return error for invalid key structure",
wantErr: true,
},
{
name: "struct primary key",
pk: testUser{ID: "test-id"},
description: "should work with struct primary key",
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}
func TestRepository_Update(t *testing.T) {
tests := []struct {
name string
description string
wantErr bool
}{
{
name: "successful update",
description: "should update document successfully",
wantErr: false,
},
{
name: "not found",
description: "should return error when document not found",
wantErr: true,
},
{
name: "no fields to update",
description: "should return error when no fields to update",
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}
func TestRepository_Delete(t *testing.T) {
tests := []struct {
name string
pk any
description string
wantErr bool
}{
{
name: "successful delete",
pk: "test-id",
description: "should delete document successfully",
wantErr: false,
},
{
name: "not found",
pk: "non-existent",
description: "should not return error when not found (idempotent)",
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}
func TestRepository_InsertMany(t *testing.T) {
tests := []struct {
name string
docs []testUser
description string
wantErr bool
}{
{
name: "empty slice",
docs: []testUser{},
description: "should return nil for empty slice",
wantErr: false,
},
{
name: "single document",
docs: []testUser{{ID: "1", Name: "Alice"}},
description: "should insert single document",
wantErr: false,
},
{
name: "multiple documents",
docs: []testUser{{ID: "1", Name: "Alice"}, {ID: "2", Name: "Bob"}},
description: "should insert multiple documents",
wantErr: false,
},
{
name: "large batch",
docs: make([]testUser, 100),
description: "should handle large batch",
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要 mock session 或實際的資料庫連接
_ = tt
})
}
}
func TestRepository_Query(t *testing.T) {
t.Run("should return QueryBuilder", func(t *testing.T) {
// 注意：這需要一個有效的 repository
// 實際的執行需要資料庫連接
})
}
func TestBuildUpdateStatement(t *testing.T) {
tests := []struct {
name string
setCols []string
whereCols []string
table string
validate func(*testing.T, string, []string)
}{
{
name: "single set column, single where column",
setCols: []string{"name"},
whereCols: []string{"id"},
table: "users",
validate: func(t *testing.T, stmt string, names []string) {
assert.Contains(t, stmt, "UPDATE")
assert.Contains(t, stmt, "users")
assert.Contains(t, stmt, "SET")
assert.Contains(t, stmt, "WHERE")
assert.Len(t, names, 2) // name, id
},
},
{
name: "multiple set columns, single where column",
setCols: []string{"name", "email", "age"},
whereCols: []string{"id"},
table: "users",
validate: func(t *testing.T, stmt string, names []string) {
assert.Contains(t, stmt, "UPDATE")
assert.Contains(t, stmt, "users")
assert.Len(t, names, 4) // name, email, age, id
},
},
{
name: "single set column, multiple where columns",
setCols: []string{"status"},
whereCols: []string{"user_id", "account_id"},
table: "accounts",
validate: func(t *testing.T, stmt string, names []string) {
assert.Contains(t, stmt, "UPDATE")
assert.Contains(t, stmt, "accounts")
assert.Len(t, names, 3) // status, user_id, account_id
},
},
{
name: "multiple set and where columns",
setCols: []string{"name", "email"},
whereCols: []string{"id", "version"},
table: "users",
validate: func(t *testing.T, stmt string, names []string) {
assert.Contains(t, stmt, "UPDATE")
assert.Len(t, names, 4) // name, email, id, version
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 創建一個臨時的 repository 來測試 buildUpdateStatement
// 注意：這需要一個有效的 metadata
// 使用 testUser 的 metadata
var zero testUser
metadata, err := generateMetadata(zero, "test_keyspace")
require.NoError(t, err)
repo := &repository[testUser]{
table: tt.table,
metadata: metadata,
}
stmt, names := repo.buildUpdateStatement(tt.setCols, tt.whereCols)
tt.validate(t, stmt, names)
})
}
}
func TestBuildUpdateFields(t *testing.T) {
tests := []struct {
name string
doc testUser
includeZero bool
wantErr bool
validate func(*testing.T, *updateFields)
}{
{
name: "update with includeZero false",
doc: testUser{ID: "1", Name: "Alice", Email: "alice@example.com"},
includeZero: false,
wantErr: false,
validate: func(t *testing.T, fields *updateFields) {
assert.NotEmpty(t, fields.setCols)
assert.Contains(t, fields.whereCols, "id")
},
},
{
name: "update with includeZero true",
doc: testUser{ID: "1", Name: "", Email: ""},
includeZero: true,
wantErr: false,
validate: func(t *testing.T, fields *updateFields) {
assert.NotEmpty(t, fields.setCols)
},
},
{
name: "no fields to update",
doc: testUser{ID: "1"},
includeZero: false,
wantErr: true,
validate: nil,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 repository 和 metadata
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}

289
pkg/library/cassandra/sai.go
View File

@ -1,289 +0,0 @@
package cassandra
import (
"context"
"fmt"
"strings"
"github.com/gocql/gocql"
)
// SAIIndexType 定義 SAI 索引類型
type SAIIndexType string
const (
// SAIIndexTypeStandard 標準索引（等於查詢）
SAIIndexTypeStandard SAIIndexType = "STANDARD"
// SAIIndexTypeCollection 集合索引（用於 list、set、map）
SAIIndexTypeCollection SAIIndexType = "COLLECTION"
// SAIIndexTypeFullText 全文索引
SAIIndexTypeFullText SAIIndexType = "FULL_TEXT"
)
// SAIIndexOptions 定義 SAI 索引選項
type SAIIndexOptions struct {
IndexType SAIIndexType // 索引類型
IsAsync bool // 是否異步建立索引
CaseSensitive bool // 是否區分大小寫（用於全文索引）
}
// DefaultSAIIndexOptions 返回預設的 SAI 索引選項
func DefaultSAIIndexOptions() *SAIIndexOptions {
return &SAIIndexOptions{
IndexType: SAIIndexTypeStandard,
IsAsync: false,
CaseSensitive: true,
}
}
// CreateSAIIndex 建立 SAI 索引
// keyspace: keyspace 名稱
// table: 資料表名稱
// column: 欄位名稱
// indexName: 索引名稱（可選，如果為空則自動生成）
// opts: 索引選項（可選，如果為 nil 則使用預設選項）
func (db *DB) CreateSAIIndex(ctx context.Context, keyspace, table, column, indexName string, opts *SAIIndexOptions) error {
// 檢查是否支援 SAI
if !db.saiSupported {
return ErrInvalidInput.WithError(fmt.Errorf("SAI is not supported in Cassandra version %s (requires 4.0.9+ or 5.0+)", db.version))
}
// 驗證參數
if keyspace == "" {
return ErrInvalidInput.WithError(fmt.Errorf("keyspace is required"))
}
if table == "" {
return ErrInvalidInput.WithError(fmt.Errorf("table is required"))
}
if column == "" {
return ErrInvalidInput.WithError(fmt.Errorf("column is required"))
}
// 使用預設選項如果未提供
if opts == nil {
opts = DefaultSAIIndexOptions()
}
// 生成索引名稱如果未提供
if indexName == "" {
indexName = fmt.Sprintf("%s_%s_sai_idx", table, column)
}
// 構建 CREATE INDEX 語句
var stmt strings.Builder
stmt.WriteString("CREATE CUSTOM INDEX IF NOT EXISTS ")
stmt.WriteString(indexName)
stmt.WriteString(" ON ")
stmt.WriteString(keyspace)
stmt.WriteString(".")
stmt.WriteString(table)
stmt.WriteString(" (")
stmt.WriteString(column)
stmt.WriteString(") USING 'StorageAttachedIndex'")
// 添加選項
var options []string
if opts.IsAsync {
options = append(options, "'async'='true'")
}
// 根據索引類型添加特定選項
switch opts.IndexType {
case SAIIndexTypeFullText:
if !opts.CaseSensitive {
options = append(options, "'case_sensitive'='false'")
} else {
options = append(options, "'case_sensitive'='true'")
}
case SAIIndexTypeCollection:
// Collection 索引不需要額外選項
}
// 如果有選項，添加到語句中
if len(options) > 0 {
stmt.WriteString(" WITH OPTIONS = {")
stmt.WriteString(strings.Join(options, ", "))
stmt.WriteString("}")
}
// 執行建立索引語句
query := db.session.Query(stmt.String(), nil).
WithContext(ctx).
Consistency(gocql.Quorum)
err := query.ExecRelease()
if err != nil {
return ErrInvalidInput.WithError(fmt.Errorf("failed to create SAI index: %w", err))
}
return nil
}
// DropSAIIndex 刪除 SAI 索引
// keyspace: keyspace 名稱
// indexName: 索引名稱
func (db *DB) DropSAIIndex(ctx context.Context, keyspace, indexName string) error {
// 驗證參數
if keyspace == "" {
return ErrInvalidInput.WithError(fmt.Errorf("keyspace is required"))
}
if indexName == "" {
return ErrInvalidInput.WithError(fmt.Errorf("index name is required"))
}
// 構建 DROP INDEX 語句
stmt := fmt.Sprintf("DROP INDEX IF EXISTS %s.%s", keyspace, indexName)
// 執行刪除索引語句
query := db.session.Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum)
err := query.ExecRelease()
if err != nil {
return ErrInvalidInput.WithError(fmt.Errorf("failed to drop SAI index: %w", err))
}
return nil
}
// ListSAIIndexes 列出指定資料表的所有 SAI 索引
// keyspace: keyspace 名稱
// table: 資料表名稱
func (db *DB) ListSAIIndexes(ctx context.Context, keyspace, table string) ([]SAIIndexInfo, error) {
// 驗證參數
if keyspace == "" {
return nil, ErrInvalidInput.WithError(fmt.Errorf("keyspace is required"))
}
if table == "" {
return nil, ErrInvalidInput.WithError(fmt.Errorf("table is required"))
}
// 查詢系統表獲取索引資訊
// system_schema.indexes 表的結構：keyspace_name, table_name, index_name, kind, options
stmt := `
SELECT index_name, kind, options
FROM system_schema.indexes
WHERE keyspace_name = ? AND table_name = ?
`
var indexes []SAIIndexInfo
iter := db.session.Query(stmt, []string{"keyspace_name", "table_name"}).
WithContext(ctx).
Consistency(gocql.One).
Bind(keyspace, table).
Iter()
var indexName, kind string
var options map[string]string
for iter.Scan(&indexName, &kind, &options) {
// 檢查是否為 SAI 索引（kind = 'CUSTOM' 且 class_name 包含 StorageAttachedIndex）
if kind == "CUSTOM" {
if className, ok := options["class_name"]; ok && strings.Contains(className, "StorageAttachedIndex") {
// 從 options 中提取 target（欄位名稱）
columnName := ""
if target, ok := options["target"]; ok {
columnName = strings.Trim(target, "()\"'")
}
indexes = append(indexes, SAIIndexInfo{
Name: indexName,
Type: "StorageAttachedIndex",
Options: options,
Column: columnName,
})
}
}
}
if err := iter.Close(); err != nil {
return nil, ErrInvalidInput.WithError(fmt.Errorf("failed to list SAI indexes: %w", err))
}
return indexes, nil
}
// SAIIndexInfo 表示 SAI 索引資訊
type SAIIndexInfo struct {
Name string // 索引名稱
Type string // 索引類型
Options map[string]string // 索引選項
Column string // 索引欄位名稱
}
// CheckSAIIndexExists 檢查 SAI 索引是否存在
// keyspace: keyspace 名稱
// indexName: 索引名稱
func (db *DB) CheckSAIIndexExists(ctx context.Context, keyspace, indexName string) (bool, error) {
// 驗證參數
if keyspace == "" {
return false, ErrInvalidInput.WithError(fmt.Errorf("keyspace is required"))
}
if indexName == "" {
return false, ErrInvalidInput.WithError(fmt.Errorf("index name is required"))
}
// 查詢系統表檢查索引是否存在
stmt := `
SELECT index_name, kind, options
FROM system_schema.indexes
WHERE keyspace_name = ? AND index_name = ?
LIMIT 1
`
var foundIndexName, kind string
var options map[string]string
err := db.session.Query(stmt, []string{"keyspace_name", "index_name"}).
WithContext(ctx).
Consistency(gocql.One).
Bind(keyspace, indexName).
Scan(&foundIndexName, &kind, &options)
if err == gocql.ErrNotFound {
return false, nil
}
if err != nil {
return false, ErrInvalidInput.WithError(fmt.Errorf("failed to check SAI index existence: %w", err))
}
// 檢查是否為 SAI 索引
if kind == "CUSTOM" {
if className, ok := options["class_name"]; ok && strings.Contains(className, "StorageAttachedIndex") {
return true, nil
}
}
return false, nil
}
// WaitForSAIIndex 等待 SAI 索引建立完成（用於異步建立）
// keyspace: keyspace 名稱
// indexName: 索引名稱
// maxWaitTime: 最大等待時間（秒）
func (db *DB) WaitForSAIIndex(ctx context.Context, keyspace, indexName string, maxWaitTime int) error {
// 驗證參數
if keyspace == "" {
return ErrInvalidInput.WithError(fmt.Errorf("keyspace is required"))
}
if indexName == "" {
return ErrInvalidInput.WithError(fmt.Errorf("index name is required"))
}
// 查詢索引狀態
// 注意：Cassandra 沒有直接的索引狀態查詢，這裡需要通過檢查索引是否可用來判斷
// 實際實作可能需要根據具體的 Cassandra 版本調整
// 簡單實作：檢查索引是否存在
exists, err := db.CheckSAIIndexExists(ctx, keyspace, indexName)
if err != nil {
return err
}
if !exists {
return ErrInvalidInput.WithError(fmt.Errorf("index %s does not exist", indexName))
}
// 注意：實際的等待邏輯可能需要查詢系統表或使用其他方法
// 這裡只是基本框架，實際使用時可能需要根據具體需求調整
return nil
}

267
pkg/library/cassandra/sai_test.go
View File

@ -1,267 +0,0 @@
package cassandra
import (
"fmt"
"testing"
"github.com/stretchr/testify/assert"
)
func TestDefaultSAIIndexOptions(t *testing.T) {
opts := DefaultSAIIndexOptions()
assert.NotNil(t, opts)
assert.Equal(t, SAIIndexTypeStandard, opts.IndexType)
assert.False(t, opts.IsAsync)
assert.True(t, opts.CaseSensitive)
}
func TestCreateSAIIndex_Validation(t *testing.T) {
tests := []struct {
name string
keyspace string
table string
column string
indexName string
opts *SAIIndexOptions
wantErr bool
errMsg string
}{
{
name: "missing keyspace",
keyspace: "",
table: "test_table",
column: "test_column",
indexName: "test_idx",
opts: nil,
wantErr: true,
errMsg: "keyspace is required",
},
{
name: "missing table",
keyspace: "test_keyspace",
table: "",
column: "test_column",
indexName: "test_idx",
opts: nil,
wantErr: true,
errMsg: "table is required",
},
{
name: "missing column",
keyspace: "test_keyspace",
table: "test_table",
column: "",
indexName: "test_idx",
opts: nil,
wantErr: true,
errMsg: "column is required",
},
{
name: "valid parameters with default options",
keyspace: "test_keyspace",
table: "test_table",
column: "test_column",
indexName: "test_idx",
opts: nil,
wantErr: false,
},
{
name: "valid parameters with custom options",
keyspace: "test_keyspace",
table: "test_table",
column: "test_column",
indexName: "test_idx",
opts: &SAIIndexOptions{
IndexType: SAIIndexTypeFullText,
IsAsync: true,
CaseSensitive: false,
},
wantErr: false,
},
{
name: "auto-generate index name",
keyspace: "test_keyspace",
table: "test_table",
column: "test_column",
indexName: "",
opts: nil,
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例和 SAI 支援
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestDropSAIIndex_Validation(t *testing.T) {
tests := []struct {
name string
keyspace string
indexName string
wantErr bool
errMsg string
}{
{
name: "missing keyspace",
keyspace: "",
indexName: "test_idx",
wantErr: true,
errMsg: "keyspace is required",
},
{
name: "missing index name",
keyspace: "test_keyspace",
indexName: "",
wantErr: true,
errMsg: "index name is required",
},
{
name: "valid parameters",
keyspace: "test_keyspace",
indexName: "test_idx",
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestListSAIIndexes_Validation(t *testing.T) {
tests := []struct {
name string
keyspace string
table string
wantErr bool
errMsg string
}{
{
name: "missing keyspace",
keyspace: "",
table: "test_table",
wantErr: true,
errMsg: "keyspace is required",
},
{
name: "missing table",
keyspace: "test_keyspace",
table: "",
wantErr: true,
errMsg: "table is required",
},
{
name: "valid parameters",
keyspace: "test_keyspace",
table: "test_table",
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestCheckSAIIndexExists_Validation(t *testing.T) {
tests := []struct {
name string
keyspace string
indexName string
wantErr bool
errMsg string
}{
{
name: "missing keyspace",
keyspace: "",
indexName: "test_idx",
wantErr: true,
errMsg: "keyspace is required",
},
{
name: "missing index name",
keyspace: "test_keyspace",
indexName: "",
wantErr: true,
errMsg: "index name is required",
},
{
name: "valid parameters",
keyspace: "test_keyspace",
indexName: "test_idx",
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// 注意：這需要一個有效的 DB 實例
// 在實際測試中，需要使用 mock 或 testcontainers
_ = tt
})
}
}
func TestSAIIndexType_Constants(t *testing.T) {
tests := []struct {
name string
indexType SAIIndexType
expected string
}{
{
name: "standard index type",
indexType: SAIIndexTypeStandard,
expected: "STANDARD",
},
{
name: "collection index type",
indexType: SAIIndexTypeCollection,
expected: "COLLECTION",
},
{
name: "full text index type",
indexType: SAIIndexTypeFullText,
expected: "FULL_TEXT",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
assert.Equal(t, tt.expected, string(tt.indexType))
})
}
}
func TestCreateSAIIndex_NotSupported(t *testing.T) {
t.Run("should return error when SAI not supported", func(t *testing.T) {
// 注意：這需要一個不支援 SAI 的 DB 實例
// 在實際測試中，需要使用 mock 或 testcontainers
})
}
func TestCreateSAIIndex_IndexNameGeneration(t *testing.T) {
t.Run("should generate index name when not provided", func(t *testing.T) {
// 測試自動生成索引名稱的邏輯
// 格式應該是: {table}_{column}_sai_idx
table := "users"
column := "email"
expected := "users_email_sai_idx"
// 這裡只是測試命名邏輯，實際建立需要 DB 實例
generated := fmt.Sprintf("%s_%s_sai_idx", table, column)
assert.Equal(t, expected, generated)
})
}

91
pkg/library/cassandra/testhelper.go
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@ -1,91 +0,0 @@
package cassandra
import (
"context"
"fmt"
"strconv"
"testing"
"github.com/testcontainers/testcontainers-go"
"github.com/testcontainers/testcontainers-go/wait"
)
// startCassandraContainer 啟動 Cassandra 測試容器
func startCassandraContainer(ctx context.Context) (string, string, func(), error) {
req := testcontainers.ContainerRequest{
Image: "cassandra:4.1",
ExposedPorts: []string{"9042/tcp"},
WaitingFor: wait.ForListeningPort("9042/tcp"),
Env: map[string]string{
"CASSANDRA_CLUSTER_NAME": "test-cluster",
},
}
cassandraC, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
ContainerRequest: req,
Started: true,
})
if err != nil {
return "", "", nil, fmt.Errorf("failed to start Cassandra container: %w", err)
}
port, err := cassandraC.MappedPort(ctx, "9042")
if err != nil {
cassandraC.Terminate(ctx)
return "", "", nil, fmt.Errorf("failed to get mapped port: %w", err)
}
host, err := cassandraC.Host(ctx)
if err != nil {
cassandraC.Terminate(ctx)
return "", "", nil, fmt.Errorf("failed to get host: %w", err)
}
tearDown := func() {
_ = cassandraC.Terminate(ctx)
}
fmt.Printf("Cassandra test container started: %s:%s\n", host, port.Port())
return host, port.Port(), tearDown, nil
}
// setupTestDB 設置測試用的 DB 實例
func setupTestDB(t testing.TB) (*DB, func()) {
ctx := context.Background()
host, port, tearDown, err := startCassandraContainer(ctx)
if err != nil {
t.Fatalf("Failed to start Cassandra container: %v", err)
}
portInt, err := strconv.Atoi(port)
if err != nil {
tearDown()
t.Fatalf("Failed to convert port to int: %v", err)
}
db, err := New(
WithHosts(host),
WithPort(portInt),
WithKeyspace("test_keyspace"),
)
if err != nil {
tearDown()
t.Fatalf("Failed to create DB: %v", err)
}
// 創建 keyspace
createKeyspaceStmt := "CREATE KEYSPACE IF NOT EXISTS test_keyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1}"
if err := db.session.Query(createKeyspaceStmt, nil).Exec(); err != nil {
db.Close()
tearDown()
t.Fatalf("Failed to create keyspace: %v", err)
}
cleanup := func() {
db.Close()
tearDown()
}
return db, cleanup
}

32
pkg/library/cassandra/types.go
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@ -1,32 +0,0 @@
package cassandra
import (
"github.com/gocql/gocql"
)
// Table 定義資料表模型必須實作的介面
type Table interface {
TableName() string
}
// PrimaryKey 定義主鍵類型（使用類型約束）
// 注意：Go 1.18+ 才支持類型約束，如果需要兼容舊版本，可以使用 interface{}
type PrimaryKey interface {
~string | ~int | ~int64 | gocql.UUID | []byte
}
// Order 定義排序順序
type Order int
const (
ASC Order = 0
DESC Order = 1
)
// 將 Order 轉換為 toGocqlX 的 Order
func (o Order) toGocqlX() string {
if o == DESC {
return "DESC"
}
return "ASC"
}

140
pkg/library/cassandra/types_test.go
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@ -1,140 +0,0 @@
package cassandra
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestOrder_ToGocqlX(t *testing.T) {
tests := []struct {
name string
order Order
expected string
}{
{
name: "ASC order",
order: ASC,
expected: "ASC",
},
{
name: "DESC order",
order: DESC,
expected: "DESC",
},
{
name: "zero value (defaults to ASC)",
order: Order(0),
expected: "ASC",
},
{
name: "invalid order value (defaults to ASC)",
order: Order(99),
expected: "ASC",
},
{
name: "negative order value (defaults to ASC)",
order: Order(-1),
expected: "ASC",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.order.toGocqlX()
assert.Equal(t, tt.expected, result)
})
}
}
func TestOrder_Constants(t *testing.T) {
tests := []struct {
name string
constant Order
expected int
}{
{
name: "ASC constant",
constant: ASC,
expected: 0,
},
{
name: "DESC constant",
constant: DESC,
expected: 1,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
assert.Equal(t, tt.expected, int(tt.constant))
})
}
}
func TestOrder_StringConversion(t *testing.T) {
tests := []struct {
name string
order Order
expected string
}{
{
name: "ASC to string",
order: ASC,
expected: "ASC",
},
{
name: "DESC to string",
order: DESC,
expected: "DESC",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.order.toGocqlX()
assert.Equal(t, tt.expected, result)
})
}
}
func TestOrder_Comparison(t *testing.T) {
t.Run("ASC should equal 0", func(t *testing.T) {
assert.Equal(t, Order(0), ASC)
})
t.Run("DESC should equal 1", func(t *testing.T) {
assert.Equal(t, Order(1), DESC)
})
t.Run("ASC should not equal DESC", func(t *testing.T) {
assert.NotEqual(t, ASC, DESC)
})
}
func TestOrder_EdgeCases(t *testing.T) {
tests := []struct {
name string
order Order
expected string
}{
{
name: "maximum int value",
order: Order(^int(0)),
expected: "ASC", // 不是 DESC，所以返回 ASC
},
{
name: "minimum int value",
order: Order(-^int(0) - 1),
expected: "ASC",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.order.toGocqlX()
assert.Equal(t, tt.expected, result)
})
}
}

18
pkg/notification/domain/entity/notification_cursor.go
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@ -1,18 +0,0 @@
package entity
import (
"time"
"github.com/gocql/gocql"
)
// NotificationCursor tracks the last seen notification for a user.
type NotificationCursor struct {
UID string `db:"user_id" partition_key:"true"`
LastSeenTS gocql.UUID `db:"last_seen_ts"`
UpdatedAt time.Time `db:"updated_at"`
}
func (uc *NotificationCursor) TableName() string {
return "notification_cursor"
}

26
pkg/notification/domain/entity/notification_event.go
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@ -1,26 +0,0 @@
package entity
import (
"backend/pkg/notification/domain/notification"
"time"
"github.com/gocql/gocql"
)
// NotificationEvent represents an event that triggers a notification.
type NotificationEvent struct {
EventID gocql.UUID `db:"event_id" partition_key:"true"` // 事件 ID
EventType string `db:"event_type"` // POST_PUBLISHED / COMMENT_ADDED / MENTIONED ...
ActorUID string `db:"actor_uid"` // 觸發者 UID
ObjectType string `db:"object_type"` // POST / COMMENT / USER ...
ObjectID string `db:"object_id"` // 對應物件 ID（post_id 等）
Title string `db:"title"` // 顯示用標題
Body string `db:"body"` // 顯示用內容 / 摘要
Payload string `db:"payload"` // JSON string（額外欄位，例如 {"postId": "..."}）
Priority notification.NotifyPriority `db:"priority"` // 1=critical, 2=high, 3=normal, 4=low
CreatedAt time.Time `db:"created_at"` // 事件時間（方便做 cross table 查詢）
}
func (ue *NotificationEvent) TableName() string {
return "notification_event"
}

22
pkg/notification/domain/entity/user_notification.go
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@ -1,22 +0,0 @@
package entity
import (
"backend/pkg/notification/domain/notification"
"time"
"github.com/gocql/gocql"
)
// UserNotification represents a notification for a specific user.
type UserNotification struct {
UserID string `db:"user_id" partition_key:"true"` // 收通知的人
Bucket string `db:"bucket" partition_key:"true"` // 分桶，例如 '2025-11' 或 '2025-11-17'
TS gocql.UUID `db:"ts" clustering_key:"true"` // 通知時間，用 now() 產生，排序用(UTC0)
EventID gocql.UUID `db:"event_id"` // 對應 notification_event.event_id
Status notification.NotifyStatus `db:"status"` // UNREAD / READ / ARCHIVED
ReadAt time.Time `db:"read_at"` // 已讀時間（非必填）
}
func (un *UserNotification) TableName() string {
return "user_notification"
}

31
pkg/notification/domain/notification/notification_priority.go
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@ -1,31 +0,0 @@
package notification
type NotifyPriority int8
func (n NotifyPriority) ToString() string {
status, ok := priorityMap[n]
if !ok {
return "unknown"
}
return status
}
const (
Critical NotifyPriority = 1
High NotifyPriority = 2
Normal NotifyPriority = 3
Low NotifyPriority = 4
CriticalStr = "critical"
HighStr = "high"
NormalStr = "normal"
LowStr = "low"
)
var priorityMap = map[NotifyPriority]string{
Critical: CriticalStr,
High: HighStr,
Normal: NormalStr,
Low: LowStr,
}

28
pkg/notification/domain/notification/notification_status.go
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@ -1,28 +0,0 @@
package notification
type NotifyStatus int8
func (n NotifyStatus) ToString() string {
status, ok := statusMap[n]
if !ok {
return "unknown"
}
return status
}
const (
UNREAD NotifyStatus = 1
READ NotifyStatus = 2
ARCHIVED NotifyStatus = 3
UNREADStr = "UNREAD"
READStr = "READ"
ARCHIVEDStr = "ARCHIVED"
)
var statusMap = map[NotifyStatus]string{
UNREAD: UNREADStr,
READ: READStr,
ARCHIVED: ARCHIVEDStr,
}

82
pkg/notification/domain/repository/notification.go
View File

@ -1,82 +0,0 @@
package repository
import (
"backend/pkg/notification/domain/entity"
"context"
"github.com/gocql/gocql"
)
type NotificationRepository interface {
NotificationEventRepository
UserNotificationRepository
NotificationCursorRepository
}
// ---- 1. Event ----
// 專心管「事件本體」，fan-out 前先寫這張。
// 通常由上游 domain event consumer 呼叫 Create。
type QueryNotificationEventParam struct {
ObjectID *string
ObjectType *string
Limit *int
}
type NotificationEventRepository interface {
// Create 建立一筆新的 NotificationEvent。
Create(ctx context.Context, e *entity.NotificationEvent) error
// GetByID 依 EventID 取得事件。
GetByID(ctx context.Context, id string) (*entity.NotificationEvent, error)
// ListByObject 依 object_type + object_id 查詢相關事件（選用，debug / 後台用）。
ListByObject(ctx context.Context, param QueryNotificationEventParam) ([]*entity.NotificationEvent, error)
}
// ---- 2. 使用者通知：user_notification ----
// 管使用者的小鈴鐺 row，fan-out 之後用這個寫入。
// ListLatestOptions 查列表用的參數
type ListLatestOptions struct {
UserID string
Buckets []string // e.g. []string{"202511", "202510"}
Limit int // 建議在 service 層限制最大值，例如 <= 100
}
type UserNotificationRepository interface {
// CreateUserNotification 建立單一通知（針對某一個 user）。
// 由呼叫端決定 bucket 與 TTL 秒數。
CreateUserNotification(ctx context.Context, n *entity.UserNotification, ttlSeconds int) error
// BulkCreate 批次建立多筆通知（fan-out worker 使用）。
// 一般期望要嘛全部成功要嘛全部失敗。
BulkCreate(ctx context.Context, list []*entity.UserNotification, ttlSeconds int) error
// ListLatest 取得某 user 最新的通知列表（小鈴鐺拉下來用）。
ListLatest(ctx context.Context, opt ListLatestOptions) ([]*entity.UserNotification, error)
// MarkRead 將單一通知設為已讀。
// 用 (user_id, bucket, ts) 精準定位那一筆資料。
MarkRead(ctx context.Context, userID, bucket string, ts gocql.UUID) error
// MarkAllRead 將指定 buckets 範圍內的通知設為已讀。
// 常見用法：最近幾個 bucket（例如最近 30 天）全部標為已讀。
// Cassandra 不適合全表掃描，實作時可分批 select 再 update。
MarkAllRead(ctx context.Context, userID string, buckets []string) error
// CountUnreadApprox 回傳未讀數（允許是近似值）。
// 實作方式可以是：
// - 掃少量 buckets 中 status='UNREAD' 的 row，然後在應用端計算
// - 或讀取外部 counter（Redis / 另一張 counter table）
CountUnreadApprox(ctx context.Context, userID string, buckets []string) (int64, error)
}
// ---- 3. NotificationCursorRepository ----
// 管 last_seen 光標，用來減少大量「每一筆更新已讀」的成本。
type NotificationCursorRepository interface {
// GetCursor 取得某 user 的光標，如果不存在可以回傳 (nil, nil)。
GetCursor(ctx context.Context, userID string) (*entity.NotificationCursor, error)
// UpsertCursor 新增或更新光標。
// 一般在使用者打開通知列表、或捲到最上面時更新。
UpsertCursor(ctx context.Context, cursor *entity.NotificationCursor) error
}

114
pkg/notification/domain/usecase/notification.go
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@ -1,114 +0,0 @@
package usecase
// Import necessary packages
import (
"context"
)
type NotificationUseCase interface {
EventUseCase
UserNotificationUseCase
CursorUseCase
}
type NotificationEvent struct {
EventType string // POST_PUBLISHED / COMMENT_ADDED / MENTIONED ...
ActorUID string // 觸發者 UID
ObjectType string // POST / COMMENT / USER ...
ObjectID string // 對應物件 ID（post_id 等）
Title string // 顯示用標題
Body string // 顯示用內容 / 摘要
Payload string // JSON string（額外欄位，例如 {"postId": "..."}）
Priority string // critical, high, normal, low
}
type NotificationEventResp struct {
EventID string `json:"event_id"`
EventType string `json:"event_type"`
ActorUID string `json:"actor_uid"`
ObjectType string `json:"object_type"`
ObjectID string `json:"object_id"`
Title string `json:"title"`
Body string `json:"body"`
Payload string `json:"payload"`
Priority string `json:"priority"`
CreatedAt string `json:"created_at"`
}
type QueryNotificationEventParam struct {
ObjectID *string
ObjectType *string
Limit *int
}
type EventUseCase interface {
// CreateEvent creates a new notification event.
CreateEvent(ctx context.Context, e *NotificationEvent) error
// GetEventByID retrieves an event by its ID.
GetEventByID(ctx context.Context, id string) (*NotificationEventResp, error)
// ListEventsByObject lists events related to a specific object.
ListEventsByObject(ctx context.Context, param QueryNotificationEventParam) ([]*NotificationEventResp, error)
}
type UserNotification struct {
UserID string `json:"user_id"` // 收通知的人
EventID string `json:"event_id"` // 對應 notification_event.event_id
TTL int `json:"ttl"`
}
type ListLatestOptions struct {
UserID string
Buckets []string // e.g. []string{"202511", "202510"}
Limit int // 建議在 service 層限制最大值，例如 <= 100
}
type UserNotificationResponse struct {
UserID string `json:"user_id"` // 收通知的人
Bucket string `json:"bucket"` // 分桶，例如 '2025-11' 或 '2025-11-17'
TS string `json:"ts"` // 通知時間，用 now() 產生，排序用(UTC0)
EventID string `json:"event_id"` // 對應 notification_event.event_id
Status string `json:"status"` // UNREAD / READ / ARCHIVED
ReadAt *string `json:"read_at,omitempty"` // 已讀時間（非必填）
}
// UserNotificationUseCase handles user-specific notification operations.
type UserNotificationUseCase interface {
// CreateUserNotification creates a notification for a single user.
CreateUserNotification(ctx context.Context, n *UserNotification) error
// BulkCreateNotifications creates multiple notifications in batch.
BulkCreateNotifications(ctx context.Context, list []*UserNotification) error
// ListLatestNotifications lists the latest notifications for a user.
ListLatestNotifications(ctx context.Context, opt ListLatestOptions) ([]*UserNotificationResponse, error)
// MarkAsRead marks a single notification as read.
MarkAsRead(ctx context.Context, userID, bucket string, ts string) error
// MarkAllAsRead marks all notifications in specified buckets as read.
MarkAllAsRead(ctx context.Context, userID string, buckets []string) error
// CountUnread approximates the count of unread notifications.
CountUnread(ctx context.Context, userID string, buckets []string) (int64, error)
}
type NotificationCursor struct {
UID string
LastSeenTS string
UpdatedAt string
}
type UpdateNotificationCursorParam struct {
UID string
LastSeenTS string
}
// CursorUseCase handles notification cursor operations for efficient reading.
type CursorUseCase interface {
// GetCursor retrieves the notification cursor for a user.
GetCursor(ctx context.Context, userID string) (*NotificationCursor, error)
// UpdateCursor updates or inserts the cursor for a user.
UpdateCursor(ctx context.Context, cursor *UpdateNotificationCursorParam) error
}

603
pkg/notification/usecase/notification.go
View File

@ -1,603 +0,0 @@
package usecase
import (
"backend/pkg/notification/domain/entity"
"backend/pkg/notification/domain/notification"
"backend/pkg/notification/domain/repository"
"backend/pkg/notification/domain/usecase"
"context"
"errors"
"fmt"
"time"
errs "backend/pkg/library/errors"
"github.com/gocql/gocql"
)
// NotificationUseCaseParam 通知服務參數配置
type NotificationUseCaseParam struct {
Repo repository.NotificationRepository
Logger errs.Logger
}
// NotificationUseCase 通知服務實現
type NotificationUseCase struct {
param NotificationUseCaseParam
}
// MustNotificationUseCase 創建通知服務實例
func MustNotificationUseCase(param NotificationUseCaseParam) usecase.NotificationUseCase {
return &NotificationUseCase{
param: param,
}
}
// ==================== EventUseCase 實現 ====================
// CreateEvent 創建新的通知事件
func (uc *NotificationUseCase) CreateEvent(ctx context.Context, e *usecase.NotificationEvent) error {
// 驗證輸入
if err := uc.validateNotificationEvent(e); err != nil {
return err
}
// 轉換 priority
priority, err := uc.parsePriority(e.Priority)
if err != nil {
return errs.InputInvalidRangeError(fmt.Sprintf("invalid priority: %s", e.Priority)).Wrap(err)
}
// 創建 entity
event := &entity.NotificationEvent{
EventID: gocql.TimeUUID(),
EventType: e.EventType,
ActorUID: e.ActorUID,
ObjectType: e.ObjectType,
ObjectID: e.ObjectID,
Title: e.Title,
Body: e.Body,
Payload: e.Payload,
Priority: priority,
CreatedAt: time.Now().UTC(),
}
// 保存到資料庫
if err := uc.param.Repo.Create(ctx, event); err != nil {
return errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "event_type", Val: e.EventType},
{Key: "actor_uid", Val: e.ActorUID},
{Key: "func", Val: "NotificationRepository.Create"},
{Key: "error", Val: err.Error()},
},
"failed to create notification event",
).Wrap(err)
}
return nil
}
// GetEventByID 根據 ID 獲取事件
func (uc *NotificationUseCase) GetEventByID(ctx context.Context, id string) (*usecase.NotificationEventResp, error) {
// 驗證 UUID 格式
if _, err := gocql.ParseUUID(id); err != nil {
return nil, errs.InputInvalidRangeError(fmt.Sprintf("invalid event ID format: %s", id)).Wrap(err)
}
// 從資料庫獲取
event, err := uc.param.Repo.GetByID(ctx, id)
if err != nil {
return nil, errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "event_id", Val: id},
{Key: "func", Val: "NotificationRepository.GetByID"},
{Key: "error", Val: err.Error()},
},
"failed to get notification event by ID",
).Wrap(err)
}
// 轉換為響應格式
return uc.entityToEventResp(event), nil
}
// ListEventsByObject 根據物件查詢事件列表
func (uc *NotificationUseCase) ListEventsByObject(ctx context.Context, param usecase.QueryNotificationEventParam) ([]*usecase.NotificationEventResp, error) {
// 驗證參數
if param.ObjectID == nil || param.ObjectType == nil || param.Limit == nil {
return nil, errs.InputInvalidRangeError("object_id and object_type are required")
}
// 構建查詢參數
repoParam := repository.QueryNotificationEventParam{
ObjectID: param.ObjectID,
ObjectType: param.ObjectType,
Limit: param.Limit,
}
// 從資料庫查詢
events, err := uc.param.Repo.ListByObject(ctx, repoParam)
if err != nil {
return nil, errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "object_id", Val: *param.ObjectID},
{Key: "object_type", Val: *param.ObjectType},
{Key: "func", Val: "NotificationRepository.ListByObject"},
{Key: "error", Val: err.Error()},
},
"failed to list notification events by object",
).Wrap(err)
}
// 轉換為響應格式
result := make([]*usecase.NotificationEventResp, 0, len(events))
for _, event := range events {
result = append(result, uc.entityToEvent(event))
}
return result, nil
}
// ==================== UserNotificationUseCase 實現 ====================
// CreateUserNotification 為單個用戶創建通知
func (uc *NotificationUseCase) CreateUserNotification(ctx context.Context, n *usecase.UserNotification) error {
// 驗證輸入
if err := uc.validateUserNotification(n); err != nil {
return err
}
// 生成 bucket
bucket := uc.generateBucket(time.Now().UTC())
// 解析 EventID
eventID, err := gocql.ParseUUID(n.EventID)
if err != nil {
return errs.InputInvalidRangeError(fmt.Sprintf("invalid event ID format: %s", n.EventID)).Wrap(err)
}
// 創建 entity
userNotif := &entity.UserNotification{
UserID: n.UserID,
Bucket: bucket,
TS: gocql.TimeUUID(),
EventID: eventID,
Status: notification.UNREAD,
ReadAt: time.Time{},
}
// 計算 TTL（如果未提供，使用默認值）
ttlSeconds := n.TTL
if ttlSeconds == 0 {
ttlSeconds = uc.calculateDefaultTTL()
}
// 保存到資料庫
if err := uc.param.Repo.CreateUserNotification(ctx, userNotif, ttlSeconds); err != nil {
return errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "user_id", Val: n.UserID},
{Key: "event_id", Val: n.EventID},
{Key: "func", Val: "NotificationRepository.CreateUserNotification"},
{Key: "error", Val: err.Error()},
},
"failed to create user notification",
).Wrap(err)
}
return nil
}
// BulkCreateNotifications 批量創建通知
func (uc *NotificationUseCase) BulkCreateNotifications(ctx context.Context, list []*usecase.UserNotification) error {
if len(list) == 0 {
return errs.InputInvalidRangeError("notification list cannot be empty")
}
// 生成 bucket
bucket := uc.generateBucket(time.Now().UTC())
// 轉換為 entity 列表
entities := make([]*entity.UserNotification, 0, len(list))
for _, n := range list {
// 驗證輸入
if err := uc.validateUserNotification(n); err != nil {
return err
}
// 解析 EventID
eventID, err := gocql.ParseUUID(n.EventID)
if err != nil {
return errs.InputInvalidRangeError(fmt.Sprintf("invalid event ID format: %s", n.EventID)).Wrap(err)
}
// 計算 TTL
ttlSeconds := n.TTL
if ttlSeconds == 0 {
ttlSeconds = uc.calculateDefaultTTL()
}
e := &entity.UserNotification{
UserID: n.UserID,
Bucket: bucket,
TS: gocql.TimeUUID(),
EventID: eventID,
Status: notification.UNREAD,
ReadAt: time.Time{},
}
entities = append(entities, e)
}
// 使用第一個通知的 TTL（假設批量通知使用相同的 TTL）
ttlSeconds := list[0].TTL
if ttlSeconds == 0 {
ttlSeconds = uc.calculateDefaultTTL()
}
// 批量保存
if err := uc.param.Repo.BulkCreate(ctx, entities, ttlSeconds); err != nil {
return errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "count", Val: len(list)},
{Key: "func", Val: "NotificationRepository.BulkCreate"},
{Key: "error", Val: err.Error()},
},
"failed to bulk create user notifications",
).Wrap(err)
}
return nil
}
// ListLatestNotifications 獲取用戶最新的通知列表
func (uc *NotificationUseCase) ListLatestNotifications(ctx context.Context, opt usecase.ListLatestOptions) ([]*usecase.UserNotificationResponse, error) {
// 驗證參數
if opt.UserID == "" {
return nil, errs.InputInvalidRangeError("user_id is required")
}
// 限制 Limit 最大值
if opt.Limit <= 0 {
opt.Limit = 20 // 默認值
}
// 如果未提供 buckets，生成默認的 buckets（最近 3 個月）
if len(opt.Buckets) == 0 {
opt.Buckets = uc.generateDefaultBuckets()
}
// 構建查詢參數
repoOpt := repository.ListLatestOptions{
UserID: opt.UserID,
Buckets: opt.Buckets,
Limit: opt.Limit,
}
// 從資料庫查詢
notifications, err := uc.param.Repo.ListLatest(ctx, repoOpt)
if err != nil {
return nil, errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "user_id", Val: opt.UserID},
{Key: "buckets", Val: opt.Buckets},
{Key: "func", Val: "NotificationRepository.ListLatest"},
{Key: "error", Val: err.Error()},
},
"failed to list latest notifications",
).Wrap(err)
}
// 轉換為響應格式
result := make([]*usecase.UserNotificationResponse, 0, len(notifications))
for _, n := range notifications {
result = append(result, uc.entityToUserNotificationResp(n))
}
return result, nil
}
// MarkAsRead 標記單個通知為已讀
func (uc *NotificationUseCase) MarkAsRead(ctx context.Context, userID, bucket string, ts string) error {
// 驗證參數
if userID == "" || bucket == "" || ts == "" {
return errs.InputInvalidRangeError("user_id, bucket, and ts are required")
}
// 解析 TimeUUID
timeUUID, err := gocql.ParseUUID(ts)
if err != nil {
return errs.InputInvalidRangeError(fmt.Sprintf("invalid ts format: %s", ts)).Wrap(err)
}
// 更新資料庫
if err := uc.param.Repo.MarkRead(ctx, userID, bucket, timeUUID); err != nil {
return errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "user_id", Val: userID},
{Key: "bucket", Val: bucket},
{Key: "ts", Val: ts},
{Key: "func", Val: "NotificationRepository.MarkRead"},
{Key: "error", Val: err.Error()},
},
"failed to mark notification as read",
).Wrap(err)
}
return nil
}
// MarkAllAsRead 標記指定 buckets 範圍內的所有通知為已讀
func (uc *NotificationUseCase) MarkAllAsRead(ctx context.Context, userID string, buckets []string) error {
// 驗證參數
if userID == "" {
return errs.InputInvalidRangeError("user_id is required")
}
// 如果未提供 buckets，使用默認的 buckets
if len(buckets) == 0 {
buckets = uc.generateDefaultBuckets()
}
// 更新資料庫
if err := uc.param.Repo.MarkAllRead(ctx, userID, buckets); err != nil {
return errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "user_id", Val: userID},
{Key: "buckets", Val: buckets},
{Key: "func", Val: "NotificationRepository.MarkAllRead"},
{Key: "error", Val: err.Error()},
},
"failed to mark all notifications as read",
).Wrap(err)
}
return nil
}
// CountUnread 計算未讀通知數量（近似值）
func (uc *NotificationUseCase) CountUnread(ctx context.Context, userID string, buckets []string) (int64, error) {
// 驗證參數
if userID == "" {
return 0, errs.InputInvalidRangeError("user_id is required")
}
// 如果未提供 buckets，使用默認的 buckets
if len(buckets) == 0 {
buckets = uc.generateDefaultBuckets()
}
// 從資料庫查詢
count, err := uc.param.Repo.CountUnreadApprox(ctx, userID, buckets)
if err != nil {
return 0, errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "user_id", Val: userID},
{Key: "buckets", Val: buckets},
{Key: "func", Val: "NotificationRepository.CountUnreadApprox"},
{Key: "error", Val: err.Error()},
},
"failed to count unread notifications",
).Wrap(err)
}
return count, nil
}
// ==================== CursorUseCase 實現 ====================
// GetCursor 獲取用戶的通知光標
func (uc *NotificationUseCase) GetCursor(ctx context.Context, userID string) (*usecase.NotificationCursor, error) {
// 驗證參數
if userID == "" {
return nil, errs.InputInvalidRangeError("user_id is required")
}
// 從資料庫查詢
cursor, err := uc.param.Repo.GetCursor(ctx, userID)
if err != nil {
return nil, errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "user_id", Val: userID},
{Key: "func", Val: "NotificationRepository.GetCursor"},
{Key: "error", Val: err.Error()},
},
"failed to get notification cursor",
).Wrap(err)
}
// 如果不存在，返回 nil
if cursor == nil {
return nil, nil
}
// 轉換為響應格式
return uc.entityToCursor(cursor), nil
}
// UpdateCursor 更新或插入通知光標
func (uc *NotificationUseCase) UpdateCursor(ctx context.Context, param *usecase.UpdateNotificationCursorParam) error {
// 驗證參數
if param == nil {
return errs.InputInvalidRangeError("cursor param is required")
}
if param.UID == "" {
return errs.InputInvalidRangeError("uid is required")
}
if param.LastSeenTS == "" {
return errs.InputInvalidRangeError("last_seen_ts is required")
}
// 解析 TimeUUID
lastSeenTS, err := gocql.ParseUUID(param.LastSeenTS)
if err != nil {
return errs.InputInvalidRangeError(fmt.Sprintf("invalid last_seen_ts format: %s", param.LastSeenTS)).Wrap(err)
}
// 創建 entity
cursor := &entity.NotificationCursor{
UID: param.UID,
LastSeenTS: lastSeenTS,
UpdatedAt: time.Now(),
}
// 更新資料庫
if err := uc.param.Repo.UpsertCursor(ctx, cursor); err != nil {
return errs.DBErrorErrorL(
uc.param.Logger,
[]errs.LogField{
{Key: "uid", Val: param.UID},
{Key: "last_seen_ts", Val: param.LastSeenTS},
{Key: "func", Val: "NotificationRepository.UpsertCursor"},
{Key: "error", Val: err.Error()},
},
"failed to update notification cursor",
).Wrap(err)
}
return nil
}
// ==================== 輔助函數 ====================
// validateNotificationEvent 驗證通知事件
func (uc *NotificationUseCase) validateNotificationEvent(e *usecase.NotificationEvent) error {
if e == nil {
return errs.InputInvalidRangeError("notification event is required")
}
if e.EventType == "" {
return errs.InputInvalidRangeError("event_type is required")
}
if e.ActorUID == "" {
return errs.InputInvalidRangeError("actor_uid is required")
}
if e.ObjectType == "" {
return errs.InputInvalidRangeError("object_type is required")
}
if e.ObjectID == "" {
return errs.InputInvalidRangeError("object_id is required")
}
return nil
}
// validateUserNotification 驗證用戶通知
func (uc *NotificationUseCase) validateUserNotification(n *usecase.UserNotification) error {
if n == nil {
return errs.InputInvalidRangeError("user notification is required")
}
if n.UserID == "" {
return errs.InputInvalidRangeError("user_id is required")
}
if n.EventID == "" {
return errs.InputInvalidRangeError("event_id is required")
}
return nil
}
// parsePriority 解析優先級字符串
func (uc *NotificationUseCase) parsePriority(priorityStr string) (notification.NotifyPriority, error) {
switch priorityStr {
case "critical":
return notification.Critical, nil
case "high":
return notification.High, nil
case "normal":
return notification.Normal, nil
case "low":
return notification.Low, nil
default:
return notification.Normal, errors.New("invalid priority value")
}
}
// generateBucket 生成 bucket 字符串（格式：YYYYMM）
func (uc *NotificationUseCase) generateBucket(t time.Time) string {
return t.Format("200601")
}
// generateDefaultBuckets 生成默認的 buckets（最近 3 個月）
func (uc *NotificationUseCase) generateDefaultBuckets() []string {
now := time.Now()
buckets := make([]string, 0, 3)
for i := 0; i < 3; i++ {
month := now.AddDate(0, -i, 0)
buckets = append(buckets, month.Format("200601"))
}
return buckets
}
// calculateDefaultTTL 計算默認 TTL（90 天）
func (uc *NotificationUseCase) calculateDefaultTTL() int {
return 90 * 24 * 60 * 60 // 90 天，單位：秒
}
// entityToEventResp 將 entity 轉換為 EventResp
func (uc *NotificationUseCase) entityToEventResp(e *entity.NotificationEvent) *usecase.NotificationEventResp {
return &usecase.NotificationEventResp{
EventID: e.EventID.String(),
EventType: e.EventType,
ActorUID: e.ActorUID,
ObjectType: e.ObjectType,
ObjectID: e.ObjectID,
Title: e.Title,
Body: e.Body,
Payload: e.Payload,
Priority: e.Priority.ToString(),
CreatedAt: e.CreatedAt.UTC().Format(time.RFC3339),
}
}
// entityToEvent 將 entity 轉換為 Event
func (uc *NotificationUseCase) entityToEvent(e *entity.NotificationEvent) *usecase.NotificationEventResp {
return &usecase.NotificationEventResp{
EventID: e.EventID.String(),
EventType: e.EventType,
ActorUID: e.ActorUID,
ObjectType: e.ObjectType,
ObjectID: e.ObjectID,
Title: e.Title,
Body: e.Body,
Payload: e.Payload,
Priority: e.Priority.ToString(),
CreatedAt: e.CreatedAt.UTC().Format(time.RFC3339),
}
}
// entityToUserNotificationResp 將 entity 轉換為 UserNotificationResponse
func (uc *NotificationUseCase) entityToUserNotificationResp(n *entity.UserNotification) *usecase.UserNotificationResponse {
resp := &usecase.UserNotificationResponse{
UserID: n.UserID,
Bucket: n.Bucket,
TS: n.TS.String(),
EventID: n.EventID.String(),
Status: n.Status.ToString(),
}
// 如果 ReadAt 不是零值，設置為字符串
if !n.ReadAt.IsZero() {
readAtStr := n.ReadAt.UTC().Format(time.RFC3339)
resp.ReadAt = &readAtStr
}
return resp
}
// entityToCursor 將 entity 轉換為 Cursor
func (uc *NotificationUseCase) entityToCursor(c *entity.NotificationCursor) *usecase.NotificationCursor {
return &usecase.NotificationCursor{
UID: c.UID,
LastSeenTS: c.LastSeenTS.String(),
UpdatedAt: c.UpdatedAt.UTC().Format(time.RFC3339),
}
}

49
pkg/post/domain/const.go
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@ -1,49 +0,0 @@
package domain
// Business constants for the post service
const (
// DefaultPageSize is the default page size for pagination
DefaultPageSize = 20
// MaxPageSize is the maximum allowed page size
MaxPageSize = 100
// MinPageSize is the minimum allowed page size
MinPageSize = 1
// MaxPostTitleLength is the maximum length for post title
MaxPostTitleLength = 200
// MinPostTitleLength is the minimum length for post title
MinPostTitleLength = 1
// MaxPostContentLength is the maximum length for post content
MaxPostContentLength = 10000
// MinPostContentLength is the minimum length for post content
MinPostContentLength = 1
// MaxCommentLength is the maximum length for comment
MaxCommentLength = 2000
// MinCommentLength is the minimum length for comment
MinCommentLength = 1
// MaxTagNameLength is the maximum length for tag name
MaxTagNameLength = 50
// MinTagNameLength is the minimum length for tag name
MinTagNameLength = 1
// MaxTagsPerPost is the maximum number of tags per post
MaxTagsPerPost = 10
// DefaultCacheExpiration is the default cache expiration time in seconds
DefaultCacheExpiration = 3600
// MaxRetryAttempts is the maximum number of retry attempts for operations
MaxRetryAttempts = 3
// DefaultLikeCacheExpiration is the default cache expiration for like counts
DefaultLikeCacheExpiration = 300 // 5 minutes
)

85
pkg/post/domain/entity/category.go
View File

@ -1,85 +0,0 @@
package entity
import (
"errors"
"time"
"github.com/gocql/gocql"
)
// Category represents a category entity for organizing posts.
type Category struct {
ID gocql.UUID `db:"id" partition_key:"true"` // Category unique identifier
Slug string `db:"slug"` // URL-friendly slug (unique)
Name string `db:"name"` // Category name
Description *string `db:"description,omitempty"` // Category description (optional)
ParentID *gocql.UUID `db:"parent_id,omitempty"` // Parent category ID (for nested categories)
PostCount int64 `db:"post_count"` // Number of posts in this category
IsActive bool `db:"is_active"` // Whether the category is active
SortOrder int32 `db:"sort_order"` // Sort order for display
CreatedAt int64 `db:"created_at"` // Creation timestamp
UpdatedAt int64 `db:"updated_at"` // Last update timestamp
}
// TableName returns the Cassandra table name for Category entities.
func (c *Category) TableName() string {
return "categories"
}
// Validate validates the Category entity
func (c *Category) Validate() error {
if c.Name == "" {
return errors.New("category name is required")
}
if c.Slug == "" {
return errors.New("category slug is required")
}
return nil
}
// SetTimestamps sets the create and update timestamps
func (c *Category) SetTimestamps() {
now := time.Now().UTC().UnixNano() / 1e6 // milliseconds
if c.CreatedAt == 0 {
c.CreatedAt = now
}
c.UpdatedAt = now
}
// IsNew returns true if this is a new category (no ID set)
func (c *Category) IsNew() bool {
var zeroUUID gocql.UUID
return c.ID == zeroUUID
}
// IsRoot returns true if this category has no parent
func (c *Category) IsRoot() bool {
var zeroUUID gocql.UUID
return c.ParentID == nil || *c.ParentID == zeroUUID
}
// IncrementPostCount increments the post count
func (c *Category) IncrementPostCount() {
c.PostCount++
c.SetTimestamps()
}
// DecrementPostCount decrements the post count
func (c *Category) DecrementPostCount() {
if c.PostCount > 0 {
c.PostCount--
c.SetTimestamps()
}
}
// Activate activates the category
func (c *Category) Activate() {
c.IsActive = true
c.SetTimestamps()
}
// Deactivate deactivates the category
func (c *Category) Deactivate() {
c.IsActive = false
c.SetTimestamps()
}

114
pkg/post/domain/entity/comment.go
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@ -1,114 +0,0 @@
package entity
import (
"errors"
"time"
"backend/pkg/post/domain/post"
"github.com/gocql/gocql"
)
// Comment represents a comment entity on a post.
// Comments can be nested (replies to comments).
type Comment struct {
ID gocql.UUID `db:"id" partition_key:"true"` // Comment unique identifier
PostID gocql.UUID `db:"post_id" clustering_key:"true"` // Post ID (clustering key for sorting)
AuthorUID string `db:"author_uid"` // Author user UID
ParentID *gocql.UUID `db:"parent_id,omitempty" clustering_key:"true"` // Parent comment ID (for nested comments)
Content string `db:"content"` // Comment content
Status post.CommentStatus `db:"status"` // Comment status
LikeCount int64 `db:"like_count"` // Number of likes
ReplyCount int64 `db:"reply_count"` // Number of replies
CreatedAt int64 `db:"created_at" clustering_key:"true"` // Creation timestamp (for sorting)
UpdatedAt int64 `db:"updated_at"` // Last update timestamp
}
// TableName returns the Cassandra table name for Comment entities.
func (c *Comment) TableName() string {
return "comments"
}
// Validate validates the Comment entity
func (c *Comment) Validate() error {
var zeroUUID gocql.UUID
if c.PostID == zeroUUID {
return errors.New("post_id is required")
}
if c.AuthorUID == "" {
return errors.New("author_uid is required")
}
if len(c.Content) < 1 || len(c.Content) > 2000 {
return errors.New("content length must be between 1 and 2000 characters")
}
if !c.Status.IsValid() {
return errors.New("invalid comment status")
}
return nil
}
// SetTimestamps sets the create and update timestamps
func (c *Comment) SetTimestamps() {
now := time.Now().UTC().UnixNano() / 1e6 // milliseconds
if c.CreatedAt == 0 {
c.CreatedAt = now
}
c.UpdatedAt = now
}
// IsNew returns true if this is a new comment (no ID set)
func (c *Comment) IsNew() bool {
var zeroUUID gocql.UUID
return c.ID == zeroUUID
}
// IsReply returns true if this comment is a reply to another comment
func (c *Comment) IsReply() bool {
var zeroUUID gocql.UUID
return c.ParentID != nil && *c.ParentID != zeroUUID
}
// Delete marks the comment as deleted (soft delete)
func (c *Comment) Delete() {
c.Status = post.CommentStatusDeleted
c.SetTimestamps()
}
// Hide hides the comment
func (c *Comment) Hide() {
c.Status = post.CommentStatusHidden
c.SetTimestamps()
}
// IsVisible returns true if the comment is visible to public
func (c *Comment) IsVisible() bool {
return c.Status.IsVisible()
}
// IncrementLikeCount increments the like count
func (c *Comment) IncrementLikeCount() {
c.LikeCount++
c.SetTimestamps()
}
// DecrementLikeCount decrements the like count
func (c *Comment) DecrementLikeCount() {
if c.LikeCount > 0 {
c.LikeCount--
c.SetTimestamps()
}
}
// IncrementReplyCount increments the reply count
func (c *Comment) IncrementReplyCount() {
c.ReplyCount++
c.SetTimestamps()
}
// DecrementReplyCount decrements the reply count
func (c *Comment) DecrementReplyCount() {
if c.ReplyCount > 0 {
c.ReplyCount--
c.SetTimestamps()
}
}

61
pkg/post/domain/entity/like.go
View File

@ -1,61 +0,0 @@
package entity
import (
"errors"
"time"
"github.com/gocql/gocql"
)
// Like represents a like entity for posts or comments.
// Uses composite primary key: (target_id, user_uid) for uniqueness.
type Like struct {
ID gocql.UUID `db:"id" partition_key:"true"` // Like unique identifier
TargetID gocql.UUID `db:"target_id" clustering_key:"true"` // Target ID (post_id or comment_id)
UserUID string `db:"user_uid" clustering_key:"true"` // User UID who liked
TargetType string `db:"target_type"` // Target type: "post" or "comment"
CreatedAt int64 `db:"created_at"` // Creation timestamp
}
// TableName returns the Cassandra table name for Like entities.
func (l *Like) TableName() string {
return "likes"
}
// Validate validates the Like entity
func (l *Like) Validate() error {
var zeroUUID gocql.UUID
if l.TargetID == zeroUUID {
return errors.New("target_id is required")
}
if l.UserUID == "" {
return errors.New("user_uid is required")
}
if l.TargetType != "post" && l.TargetType != "comment" {
return errors.New("target_type must be 'post' or 'comment'")
}
return nil
}
// SetTimestamps sets the create timestamp
func (l *Like) SetTimestamps() {
if l.CreatedAt == 0 {
l.CreatedAt = time.Now().UTC().UnixNano() / 1e6 // milliseconds
}
}
// IsNew returns true if this is a new like (no ID set)
func (l *Like) IsNew() bool {
var zeroUUID gocql.UUID
return l.ID == zeroUUID
}
// IsPostLike returns true if this like is for a post
func (l *Like) IsPostLike() bool {
return l.TargetType == "post"
}
// IsCommentLike returns true if this like is for a comment
func (l *Like) IsCommentLike() bool {
return l.TargetType == "comment"
}

156
pkg/post/domain/entity/post.go
View File

@ -1,156 +0,0 @@
package entity
import (
"errors"
"time"
"backend/pkg/post/domain/post"
"github.com/gocql/gocql"
)
// Post represents a post entity in the system.
// It contains the main content and metadata for user posts.
type Post struct {
ID gocql.UUID `db:"id" partition_key:"true"` // Post unique identifier
AuthorUID string `db:"author_uid"` // Author user UID
Title string `db:"title"` // Post title
Content string `db:"content"` // Post content
Type post.Type `db:"type"` // Post type (text, image, video, etc.)
Status post.Status `db:"status"` // Post status (draft, published, etc.)
CategoryID *gocql.UUID `db:"category_id,omitempty"` // Category ID (optional)
Tags []string `db:"tags,omitempty"` // Post tags
Images []string `db:"images,omitempty"` // Image URLs (optional)
VideoURL *string `db:"video_url,omitempty"` // Video URL (optional)
LinkURL *string `db:"link_url,omitempty"` // Link URL (optional)
LikeCount int64 `db:"like_count"` // Number of likes
CommentCount int64 `db:"comment_count"` // Number of comments
ViewCount int64 `db:"view_count"` // Number of views
IsPinned bool `db:"is_pinned"` // Whether the post is pinned
PinnedAt *int64 `db:"pinned_at,omitempty"` // Pinned timestamp (optional)
PublishedAt *int64 `db:"published_at,omitempty"` // Published timestamp (optional)
CreatedAt int64 `db:"created_at"` // Creation timestamp
UpdatedAt int64 `db:"updated_at"` // Last update timestamp
}
// TableName returns the Cassandra table name for Post entities.
func (p *Post) TableName() string {
return "posts"
}
// Validate validates the Post entity
func (p *Post) Validate() error {
if p.AuthorUID == "" {
return errors.New("author_uid is required")
}
if len(p.Title) < 1 || len(p.Title) > 200 {
return errors.New("title length must be between 1 and 200 characters")
}
if len(p.Content) < 1 || len(p.Content) > 10000 {
return errors.New("content length must be between 1 and 10000 characters")
}
if !p.Type.IsValid() {
return errors.New("invalid post type")
}
if !p.Status.IsValid() {
return errors.New("invalid post status")
}
if len(p.Tags) > 10 {
return errors.New("maximum 10 tags allowed per post")
}
return nil
}
// SetTimestamps sets the create and update timestamps
func (p *Post) SetTimestamps() {
now := time.Now().UTC().UnixNano() / 1e6 // milliseconds
if p.CreatedAt == 0 {
p.CreatedAt = now
}
p.UpdatedAt = now
}
// IsNew returns true if this is a new post (no ID set)
func (p *Post) IsNew() bool {
var zeroUUID gocql.UUID
return p.ID == zeroUUID
}
// Publish marks the post as published
func (p *Post) Publish() {
p.Status = post.PostStatusPublished
now := time.Now().UTC().UnixNano() / 1e6
p.PublishedAt = &now
p.SetTimestamps()
}
// Archive marks the post as archived
func (p *Post) Archive() {
p.Status = post.PostStatusArchived
p.SetTimestamps()
}
// Delete marks the post as deleted (soft delete)
func (p *Post) Delete() {
p.Status = post.PostStatusDeleted
p.SetTimestamps()
}
// IsVisible returns true if the post is visible to public
func (p *Post) IsVisible() bool {
return p.Status.IsVisible()
}
// IsEditable returns true if the post can be edited
func (p *Post) IsEditable() bool {
return p.Status.IsEditable()
}
// IncrementLikeCount increments the like count
func (p *Post) IncrementLikeCount() {
p.LikeCount++
p.SetTimestamps()
}
// DecrementLikeCount decrements the like count
func (p *Post) DecrementLikeCount() {
if p.LikeCount > 0 {
p.LikeCount--
p.SetTimestamps()
}
}
// IncrementCommentCount increments the comment count
func (p *Post) IncrementCommentCount() {
p.CommentCount++
p.SetTimestamps()
}
// DecrementCommentCount decrements the comment count
func (p *Post) DecrementCommentCount() {
if p.CommentCount > 0 {
p.CommentCount--
p.SetTimestamps()
}
}
// IncrementViewCount increments the view count
func (p *Post) IncrementViewCount() {
p.ViewCount++
p.SetTimestamps()
}
// Pin pins the post
func (p *Post) Pin() {
p.IsPinned = true
now := time.Now().UTC().UnixNano() / 1e6
p.PinnedAt = &now
p.SetTimestamps()
}
// Unpin unpins the post
func (p *Post) Unpin() {
p.IsPinned = false
p.PinnedAt = nil
p.SetTimestamps()
}

60
pkg/post/domain/entity/tag.go
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@ -1,60 +0,0 @@
package entity
import (
"errors"
"time"
"github.com/gocql/gocql"
)
// Tag represents a tag entity for categorizing posts.
type Tag struct {
ID gocql.UUID `db:"id" partition_key:"true"` // Tag unique identifier
Name string `db:"name"` // Tag name (unique)
Description *string `db:"description,omitempty"` // Tag description (optional)
PostCount int64 `db:"post_count"` // Number of posts using this tag
CreatedAt int64 `db:"created_at"` // Creation timestamp
UpdatedAt int64 `db:"updated_at"` // Last update timestamp
}
// TableName returns the Cassandra table name for Tag entities.
func (t *Tag) TableName() string {
return "tags"
}
// Validate validates the Tag entity
func (t *Tag) Validate() error {
if len(t.Name) < 1 || len(t.Name) > 50 {
return errors.New("tag name length must be between 1 and 50 characters")
}
return nil
}
// SetTimestamps sets the create and update timestamps
func (t *Tag) SetTimestamps() {
now := time.Now().UTC().UnixNano() / 1e6 // milliseconds
if t.CreatedAt == 0 {
t.CreatedAt = now
}
t.UpdatedAt = now
}
// IsNew returns true if this is a new tag (no ID set)
func (t *Tag) IsNew() bool {
var zeroUUID gocql.UUID
return t.ID == zeroUUID
}
// IncrementPostCount increments the post count
func (t *Tag) IncrementPostCount() {
t.PostCount++
t.SetTimestamps()
}
// DecrementPostCount decrements the post count
func (t *Tag) DecrementPostCount() {
if t.PostCount > 0 {
t.PostCount--
t.SetTimestamps()
}
}

38
pkg/post/domain/post/comment_status.go
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@ -1,38 +0,0 @@
package post
// CommentStatus 評論狀態
type CommentStatus int32
func (s CommentStatus) CodeToString() string {
result, ok := commentStatusMap[s]
if !ok {
return ""
}
return result
}
var commentStatusMap = map[CommentStatus]string{
CommentStatusPublished: "published", // 已發布
CommentStatusDeleted: "deleted", // 已刪除
CommentStatusHidden: "hidden", // 隱藏
}
func (s CommentStatus) ToInt32() int32 {
return int32(s)
}
const (
CommentStatusPublished CommentStatus = 0 // 已發布
CommentStatusDeleted CommentStatus = 1 // 已刪除
CommentStatusHidden CommentStatus = 2 // 隱藏
)
// IsValid returns true if the status is valid
func (s CommentStatus) IsValid() bool {
return s >= CommentStatusPublished && s <= CommentStatusHidden
}
// IsVisible returns true if the comment is visible to public
func (s CommentStatus) IsVisible() bool {
return s == CommentStatusPublished
}

47
pkg/post/domain/post/status.go
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@ -1,47 +0,0 @@
package post
// Status 貼文狀態
type Status int32
func (s Status) CodeToString() string {
result, ok := postStatusMap[s]
if !ok {
return ""
}
return result
}
var postStatusMap = map[Status]string{
PostStatusDraft: "draft", // 草稿
PostStatusPublished: "published", // 已發布
PostStatusArchived: "archived", // 已歸檔
PostStatusDeleted: "deleted", // 已刪除
PostStatusHidden: "hidden", // 隱藏
}
func (s Status) ToInt32() int32 {
return int32(s)
}
const (
PostStatusDraft Status = 0 // 草稿
PostStatusPublished Status = 1 // 已發布
PostStatusArchived Status = 2 // 已歸檔
PostStatusDeleted Status = 3 // 已刪除
PostStatusHidden Status = 4 // 隱藏
)
// IsValid returns true if the status is valid
func (s Status) IsValid() bool {
return s >= PostStatusDraft && s <= PostStatusHidden
}
// IsVisible returns true if the post is visible to public
func (s Status) IsVisible() bool {
return s == PostStatusPublished
}
// IsEditable returns true if the post can be edited
func (s Status) IsEditable() bool {
return s == PostStatusDraft || s == PostStatusPublished
}

39
pkg/post/domain/post/type.go
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@ -1,39 +0,0 @@
package post
// Type 貼文類型
type Type int32
func (t Type) CodeToString() string {
result, ok := postTypeMap[t]
if !ok {
return ""
}
return result
}
var postTypeMap = map[Type]string{
TypeText: "text", // 純文字
TypeImage: "image", // 圖片
TypeVideo: "video", // 影片
TypeLink: "link", // 連結
TypePoll: "poll", // 投票
TypeArticle: "article", // 長文
}
func (t Type) ToInt32() int32 {
return int32(t)
}
const (
TypeText Type = 0 // 純文字
TypeImage Type = 1 // 圖片
TypeVideo Type = 2 // 影片
TypeLink Type = 3 // 連結
TypePoll Type = 4 // 投票
TypeArticle Type = 5 // 長文
)
// IsValid returns true if the type is valid
func (t Type) IsValid() bool {
return t >= TypeText && t <= TypeArticle
}

26
pkg/post/domain/repository/category.go
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@ -1,26 +0,0 @@
package repository
import (
"context"
"backend/pkg/post/domain/entity"
)
// CategoryRepository defines the interface for category data access operations
type CategoryRepository interface {
BaseCategoryRepository
FindBySlug(ctx context.Context, slug string) (*entity.Category, error)
FindByParentID(ctx context.Context, parentID string) ([]*entity.Category, error)
FindRootCategories(ctx context.Context) ([]*entity.Category, error)
FindActive(ctx context.Context) ([]*entity.Category, error)
IncrementPostCount(ctx context.Context, categoryID string) error
DecrementPostCount(ctx context.Context, categoryID string) error
}
// BaseCategoryRepository defines basic CRUD operations for categories
type BaseCategoryRepository interface {
Insert(ctx context.Context, data *entity.Category) error
FindOne(ctx context.Context, id string) (*entity.Category, error)
Update(ctx context.Context, data *entity.Category) error
Delete(ctx context.Context, id string) error
}

46
pkg/post/domain/repository/comment.go
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@ -1,46 +0,0 @@
package repository
import (
"context"
"backend/pkg/post/domain/entity"
"backend/pkg/post/domain/post"
"github.com/gocql/gocql"
)
// CommentRepository defines the interface for comment data access operations
type CommentRepository interface {
BaseCommentRepository
FindByPostID(ctx context.Context, postID gocql.UUID, params *CommentQueryParams) ([]*entity.Comment, int64, error)
FindByParentID(ctx context.Context, parentID gocql.UUID, params *CommentQueryParams) ([]*entity.Comment, int64, error)
FindByAuthorUID(ctx context.Context, authorUID string, params *CommentQueryParams) ([]*entity.Comment, int64, error)
FindReplies(ctx context.Context, commentID gocql.UUID, params *CommentQueryParams) ([]*entity.Comment, int64, error)
IncrementLikeCount(ctx context.Context, commentID gocql.UUID) error
DecrementLikeCount(ctx context.Context, commentID gocql.UUID) error
IncrementReplyCount(ctx context.Context, commentID gocql.UUID) error
DecrementReplyCount(ctx context.Context, commentID gocql.UUID) error
UpdateStatus(ctx context.Context, commentID gocql.UUID, status post.CommentStatus) error
}
// BaseCommentRepository defines basic CRUD operations for comments
type BaseCommentRepository interface {
Insert(ctx context.Context, data *entity.Comment) error
FindOne(ctx context.Context, id gocql.UUID) (*entity.Comment, error)
Update(ctx context.Context, data *entity.Comment) error
Delete(ctx context.Context, id gocql.UUID) error
}
// CommentQueryParams defines query parameters for comment listing
type CommentQueryParams struct {
PostID *gocql.UUID
ParentID *gocql.UUID
AuthorUID *string
Status *post.CommentStatus
CreateStartTime *int64
CreateEndTime *int64
PageSize int64
PageIndex int64
OrderBy string // "created_at", "like_count"
OrderDirection string // "ASC", "DESC"
}

37
pkg/post/domain/repository/like.go
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@ -1,37 +0,0 @@
package repository
import (
"context"
"backend/pkg/post/domain/entity"
"github.com/gocql/gocql"
)
// LikeRepository defines the interface for like data access operations
type LikeRepository interface {
BaseLikeRepository
FindByTargetID(ctx context.Context, targetID gocql.UUID, targetType string) ([]*entity.Like, error)
FindByUserUID(ctx context.Context, userUID string, params *LikeQueryParams) ([]*entity.Like, int64, error)
FindByTargetAndUser(ctx context.Context, targetID gocql.UUID, userUID string, targetType string) (*entity.Like, error)
CountByTargetID(ctx context.Context, targetID gocql.UUID, targetType string) (int64, error)
DeleteByTargetAndUser(ctx context.Context, targetID gocql.UUID, userUID string, targetType string) error
}
// BaseLikeRepository defines basic CRUD operations for likes
type BaseLikeRepository interface {
Insert(ctx context.Context, data *entity.Like) error
FindOne(ctx context.Context, id gocql.UUID) (*entity.Like, error)
Delete(ctx context.Context, id gocql.UUID) error
}
// LikeQueryParams defines query parameters for like listing
type LikeQueryParams struct {
TargetID *gocql.UUID
TargetType *string
UserUID *string
PageSize int64
PageIndex int64
OrderBy string // "created_at"
OrderDirection string // "ASC", "DESC"
}

54
pkg/post/domain/repository/post.go
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@ -1,54 +0,0 @@
package repository
import (
"context"
"backend/pkg/post/domain/entity"
"backend/pkg/post/domain/post"
"github.com/gocql/gocql"
)
// PostRepository defines the interface for post data access operations
type PostRepository interface {
BasePostRepository
FindByAuthorUID(ctx context.Context, authorUID string, params *PostQueryParams) ([]*entity.Post, int64, error)
FindByCategoryID(ctx context.Context, categoryID gocql.UUID, params *PostQueryParams) ([]*entity.Post, int64, error)
FindByTag(ctx context.Context, tagName string, params *PostQueryParams) ([]*entity.Post, int64, error)
FindPinnedPosts(ctx context.Context, limit int64) ([]*entity.Post, error)
FindByStatus(ctx context.Context, status post.Status, params *PostQueryParams) ([]*entity.Post, int64, error)
IncrementLikeCount(ctx context.Context, postID gocql.UUID) error
DecrementLikeCount(ctx context.Context, postID gocql.UUID) error
IncrementCommentCount(ctx context.Context, postID gocql.UUID) error
DecrementCommentCount(ctx context.Context, postID gocql.UUID) error
IncrementViewCount(ctx context.Context, postID gocql.UUID) error
UpdateStatus(ctx context.Context, postID gocql.UUID, status post.Status) error
PinPost(ctx context.Context, postID gocql.UUID) error
UnpinPost(ctx context.Context, postID gocql.UUID) error
}
// BasePostRepository defines basic CRUD operations for posts
type BasePostRepository interface {
Insert(ctx context.Context, data *entity.Post) error
FindOne(ctx context.Context, id gocql.UUID) (*entity.Post, error)
Update(ctx context.Context, data *entity.Post) error
Delete(ctx context.Context, id gocql.UUID) error
}
// PostQueryParams defines query parameters for post listing
type PostQueryParams struct {
AuthorUID *string
CategoryID *gocql.UUID
Tag *string
Status *post.Status
Type *post.Type
IsPinned *bool
CreateStartTime *int64
CreateEndTime *int64
PublishedStartTime *int64
PublishedEndTime *int64
PageSize int64
PageIndex int64
OrderBy string // "created_at", "published_at", "like_count", "view_count"
OrderDirection string // "ASC", "DESC"
}

28
pkg/post/domain/repository/tag.go
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@ -1,28 +0,0 @@
package repository
import (
"context"
"backend/pkg/post/domain/entity"
"github.com/gocql/gocql"
)
// TagRepository defines the interface for tag data access operations
type TagRepository interface {
BaseTagRepository
FindByName(ctx context.Context, name string) (*entity.Tag, error)
FindByNames(ctx context.Context, names []string) ([]*entity.Tag, error)
FindPopular(ctx context.Context, limit int64) ([]*entity.Tag, error)
IncrementPostCount(ctx context.Context, tagID gocql.UUID) error
DecrementPostCount(ctx context.Context, tagID gocql.UUID) error
}
// BaseTagRepository defines basic CRUD operations for tags
type BaseTagRepository interface {
Insert(ctx context.Context, data *entity.Tag) error
FindOne(ctx context.Context, id gocql.UUID) (*entity.Tag, error)
Update(ctx context.Context, data *entity.Tag) error
Delete(ctx context.Context, id gocql.UUID) error
}

128
pkg/post/domain/usecase/comment.go
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@ -1,128 +0,0 @@
package usecase
import (
"context"
"backend/pkg/post/domain/post"
"github.com/gocql/gocql"
)
// CommentUseCase defines the interface for comment business logic operations
type CommentUseCase interface {
CommentCRUDUseCase
CommentQueryUseCase
CommentInteractionUseCase
}
// CommentCRUDUseCase defines CRUD operations for comments
type CommentCRUDUseCase interface {
// CreateComment creates a new comment
CreateComment(ctx context.Context, req CreateCommentRequest) (*CommentResponse, error)
// GetComment retrieves a comment by ID
GetComment(ctx context.Context, req GetCommentRequest) (*CommentResponse, error)
// UpdateComment updates an existing comment
UpdateComment(ctx context.Context, req UpdateCommentRequest) (*CommentResponse, error)
// DeleteComment deletes a comment (soft delete)
DeleteComment(ctx context.Context, req DeleteCommentRequest) error
}
// CommentQueryUseCase defines query operations for comments
type CommentQueryUseCase interface {
// ListComments lists comments for a post
ListComments(ctx context.Context, req ListCommentsRequest) (*ListCommentsResponse, error)
// ListReplies lists replies to a comment
ListReplies(ctx context.Context, req ListRepliesRequest) (*ListCommentsResponse, error)
// ListCommentsByAuthor lists comments by author
ListCommentsByAuthor(ctx context.Context, req ListCommentsByAuthorRequest) (*ListCommentsResponse, error)
}
// CommentInteractionUseCase defines interaction operations for comments
type CommentInteractionUseCase interface {
// LikeComment likes a comment
LikeComment(ctx context.Context, req LikeCommentRequest) error
// UnlikeComment unlikes a comment
UnlikeComment(ctx context.Context, req UnlikeCommentRequest) error
}
// CreateCommentRequest represents a request to create a comment
type CreateCommentRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
AuthorUID string `json:"author_uid"` // Author user UID
ParentID *gocql.UUID `json:"parent_id,omitempty"` // Parent comment ID (optional, for replies)
Content string `json:"content"` // Comment content
}
// UpdateCommentRequest represents a request to update a comment
type UpdateCommentRequest struct {
CommentID gocql.UUID `json:"comment_id"` // Comment ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
Content string `json:"content"` // Comment content
}
// GetCommentRequest represents a request to get a comment
type GetCommentRequest struct {
CommentID gocql.UUID `json:"comment_id"` // Comment ID
}
// DeleteCommentRequest represents a request to delete a comment
type DeleteCommentRequest struct {
CommentID gocql.UUID `json:"comment_id"` // Comment ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
}
// ListCommentsRequest represents a request to list comments
type ListCommentsRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
ParentID *gocql.UUID `json:"parent_id,omitempty"` // Parent comment ID (optional, for replies only)
PageSize int64 `json:"page_size"` // Page size
PageIndex int64 `json:"page_index"` // Page index
OrderBy string `json:"order_by,omitempty"` // Order by field (default: "created_at")
OrderDirection string `json:"order_direction,omitempty"` // Order direction (ASC/DESC, default: ASC)
}
// ListRepliesRequest represents a request to list replies to a comment
type ListRepliesRequest struct {
CommentID gocql.UUID `json:"comment_id"` // Comment ID
PageSize int64 `json:"page_size"` // Page size
PageIndex int64 `json:"page_index"` // Page index
}
// ListCommentsByAuthorRequest represents a request to list comments by author
type ListCommentsByAuthorRequest struct {
AuthorUID string `json:"author_uid"` // Author UID
PageSize int64 `json:"page_size"` // Page size
PageIndex int64 `json:"page_index"` // Page index
}
// LikeCommentRequest represents a request to like a comment
type LikeCommentRequest struct {
CommentID gocql.UUID `json:"comment_id"` // Comment ID
UserUID string `json:"user_uid"` // User UID
}
// UnlikeCommentRequest represents a request to unlike a comment
type UnlikeCommentRequest struct {
CommentID gocql.UUID `json:"comment_id"` // Comment ID
UserUID string `json:"user_uid"` // User UID
}
// CommentResponse represents a comment response
type CommentResponse struct {
ID gocql.UUID `json:"id"`
PostID gocql.UUID `json:"post_id"`
AuthorUID string `json:"author_uid"`
ParentID *gocql.UUID `json:"parent_id,omitempty"`
Content string `json:"content"`
Status post.CommentStatus `json:"status"`
LikeCount int64 `json:"like_count"`
ReplyCount int64 `json:"reply_count"`
CreatedAt int64 `json:"created_at"`
UpdatedAt int64 `json:"updated_at"`
}
// ListCommentsResponse represents a list of comments response
type ListCommentsResponse struct {
Data []CommentResponse `json:"data"`
Page Pager `json:"page"`
}

229
pkg/post/domain/usecase/post.go
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@ -1,229 +0,0 @@
package usecase
import (
"context"
"backend/pkg/post/domain/post"
"github.com/gocql/gocql"
)
// PostUseCase defines the interface for post business logic operations
type PostUseCase interface {
PostCRUDUseCase
PostQueryUseCase
PostInteractionUseCase
PostManagementUseCase
}
// PostCRUDUseCase defines CRUD operations for posts
type PostCRUDUseCase interface {
// CreatePost creates a new post
CreatePost(ctx context.Context, req CreatePostRequest) (*PostResponse, error)
// GetPost retrieves a post by ID
GetPost(ctx context.Context, req GetPostRequest) (*PostResponse, error)
// UpdatePost updates an existing post
UpdatePost(ctx context.Context, req UpdatePostRequest) (*PostResponse, error)
// DeletePost deletes a post (soft delete)
DeletePost(ctx context.Context, req DeletePostRequest) error
// PublishPost publishes a draft post
PublishPost(ctx context.Context, req PublishPostRequest) (*PostResponse, error)
// ArchivePost archives a post
ArchivePost(ctx context.Context, req ArchivePostRequest) error
}
// PostQueryUseCase defines query operations for posts
type PostQueryUseCase interface {
// ListPosts lists posts with filters and pagination
ListPosts(ctx context.Context, req ListPostsRequest) (*ListPostsResponse, error)
// ListPostsByAuthor lists posts by author UID
ListPostsByAuthor(ctx context.Context, req ListPostsByAuthorRequest) (*ListPostsResponse, error)
// ListPostsByCategory lists posts by category
ListPostsByCategory(ctx context.Context, req ListPostsByCategoryRequest) (*ListPostsResponse, error)
// ListPostsByTag lists posts by tag
ListPostsByTag(ctx context.Context, req ListPostsByTagRequest) (*ListPostsResponse, error)
// GetPinnedPosts gets pinned posts
GetPinnedPosts(ctx context.Context, req GetPinnedPostsRequest) (*ListPostsResponse, error)
}
// PostInteractionUseCase defines interaction operations for posts
type PostInteractionUseCase interface {
// LikePost likes a post
LikePost(ctx context.Context, req LikePostRequest) error
// UnlikePost unlikes a post
UnlikePost(ctx context.Context, req UnlikePostRequest) error
// ViewPost increments view count
ViewPost(ctx context.Context, req ViewPostRequest) error
}
// PostManagementUseCase defines management operations for posts
type PostManagementUseCase interface {
// PinPost pins a post
PinPost(ctx context.Context, req PinPostRequest) error
// UnpinPost unpins a post
UnpinPost(ctx context.Context, req UnpinPostRequest) error
}
// CreatePostRequest represents a request to create a post
type CreatePostRequest struct {
AuthorUID string `json:"author_uid"` // Author user UID
Title string `json:"title"` // Post title
Content string `json:"content"` // Post content
Type post.Type `json:"type"` // Post type
CategoryID *gocql.UUID `json:"category_id,omitempty"` // Category ID (optional)
Tags []string `json:"tags,omitempty"` // Post tags (optional)
Images []string `json:"images,omitempty"` // Image URLs (optional)
VideoURL *string `json:"video_url,omitempty"` // Video URL (optional)
LinkURL *string `json:"link_url,omitempty"` // Link URL (optional)
Status post.Status `json:"status,omitempty"` // Post status (default: draft)
}
// UpdatePostRequest represents a request to update a post
type UpdatePostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
Title *string `json:"title,omitempty"` // Post title (optional)
Content *string `json:"content,omitempty"` // Post content (optional)
Type *post.Type `json:"type,omitempty"` // Post type (optional)
CategoryID *gocql.UUID `json:"category_id,omitempty"` // Category ID (optional)
Tags []string `json:"tags,omitempty"` // Post tags (optional)
Images []string `json:"images,omitempty"` // Image URLs (optional)
VideoURL *string `json:"video_url,omitempty"` // Video URL (optional)
LinkURL *string `json:"link_url,omitempty"` // Link URL (optional)
}
// GetPostRequest represents a request to get a post
type GetPostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
UserUID *string `json:"user_uid,omitempty"` // User UID (for view count increment)
}
// DeletePostRequest represents a request to delete a post
type DeletePostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
}
// PublishPostRequest represents a request to publish a post
type PublishPostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
}
// ArchivePostRequest represents a request to archive a post
type ArchivePostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
}
// ListPostsRequest represents a request to list posts
type ListPostsRequest struct {
CategoryID *gocql.UUID `json:"category_id,omitempty"` // Category ID (optional)
Tag *string `json:"tag,omitempty"` // Tag name (optional)
Status *post.Status `json:"status,omitempty"` // Post status (optional)
Type *post.Type `json:"type,omitempty"` // Post type (optional)
AuthorUID *string `json:"author_uid,omitempty"` // Author UID (optional)
CreateStartTime *int64 `json:"create_start_time,omitempty"` // Create start time (optional)
CreateEndTime *int64 `json:"create_end_time,omitempty"` // Create end time (optional)
PageSize int64 `json:"page_size"` // Page size
PageIndex int64 `json:"page_index"` // Page index
OrderBy string `json:"order_by,omitempty"` // Order by field
OrderDirection string `json:"order_direction,omitempty"` // Order direction (ASC/DESC)
}
// ListPostsByAuthorRequest represents a request to list posts by author
type ListPostsByAuthorRequest struct {
AuthorUID string `json:"author_uid"` // Author UID
Status *post.Status `json:"status,omitempty"` // Post status (optional)
PageSize int64 `json:"page_size"` // Page size
PageIndex int64 `json:"page_index"` // Page index
}
// ListPostsByCategoryRequest represents a request to list posts by category
type ListPostsByCategoryRequest struct {
CategoryID gocql.UUID `json:"category_id"` // Category ID
Status *post.Status `json:"status,omitempty"` // Post status (optional)
PageSize int64 `json:"page_size"` // Page size
PageIndex int64 `json:"page_index"` // Page index
}
// ListPostsByTagRequest represents a request to list posts by tag
type ListPostsByTagRequest struct {
Tag string `json:"tag"` // Tag name
Status *post.Status `json:"status,omitempty"` // Post status (optional)
PageSize int64 `json:"page_size"` // Page size
PageIndex int64 `json:"page_index"` // Page index
}
// GetPinnedPostsRequest represents a request to get pinned posts
type GetPinnedPostsRequest struct {
Limit int64 `json:"limit,omitempty"` // Limit (optional, default: 10)
}
// LikePostRequest represents a request to like a post
type LikePostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
UserUID string `json:"user_uid"` // User UID
}
// UnlikePostRequest represents a request to unlike a post
type UnlikePostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
UserUID string `json:"user_uid"` // User UID
}
// ViewPostRequest represents a request to view a post
type ViewPostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
UserUID *string `json:"user_uid,omitempty"` // User UID (optional)
}
// PinPostRequest represents a request to pin a post
type PinPostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
}
// UnpinPostRequest represents a request to unpin a post
type UnpinPostRequest struct {
PostID gocql.UUID `json:"post_id"` // Post ID
AuthorUID string `json:"author_uid"` // Author user UID (for authorization)
}
// PostResponse represents a post response
type PostResponse struct {
ID gocql.UUID `json:"id"`
AuthorUID string `json:"author_uid"`
Title string `json:"title"`
Content string `json:"content"`
Type post.Type `json:"type"`
Status post.Status `json:"status"`
CategoryID *gocql.UUID `json:"category_id,omitempty"`
Tags []string `json:"tags,omitempty"`
Images []string `json:"images,omitempty"`
VideoURL *string `json:"video_url,omitempty"`
LinkURL *string `json:"link_url,omitempty"`
LikeCount int64 `json:"like_count"`
CommentCount int64 `json:"comment_count"`
ViewCount int64 `json:"view_count"`
IsPinned bool `json:"is_pinned"`
PinnedAt *int64 `json:"pinned_at,omitempty"`
PublishedAt *int64 `json:"published_at,omitempty"`
CreatedAt int64 `json:"created_at"`
UpdatedAt int64 `json:"updated_at"`
}
// ListPostsResponse represents a list of posts response
type ListPostsResponse struct {
Data []PostResponse `json:"data"`
Page Pager `json:"page"`
}
// Pager represents pagination information
type Pager struct {
PageIndex int64 `json:"page_index"`
PageSize int64 `json:"page_size"`
Total int64 `json:"total"`
TotalPage int64 `json:"total_page"`
}

263
pkg/post/repository/category.go
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@ -1,263 +0,0 @@
package repository
import (
"context"
"fmt"
"strings"
"backend/pkg/library/cassandra"
"backend/pkg/post/domain/entity"
domainRepo "backend/pkg/post/domain/repository"
"github.com/gocql/gocql"
)
// CategoryRepositoryParam 定義 CategoryRepository 的初始化參數
type CategoryRepositoryParam struct {
DB *cassandra.DB
Keyspace string
}
// CategoryRepository 實作 domain repository 介面
type CategoryRepository struct {
repo cassandra.Repository[*entity.Category]
db *cassandra.DB
keyspace string
}
// NewCategoryRepository 創建新的 CategoryRepository
func NewCategoryRepository(param CategoryRepositoryParam) domainRepo.CategoryRepository {
repo, err := cassandra.NewRepository[*entity.Category](param.DB, param.Keyspace)
if err != nil {
panic(fmt.Sprintf("failed to create category repository: %v", err))
}
keyspace := param.Keyspace
if keyspace == "" {
keyspace = param.DB.GetDefaultKeyspace()
}
return &CategoryRepository{
repo: repo,
db: param.DB,
keyspace: keyspace,
}
}
// Insert 插入單筆分類
func (r *CategoryRepository) Insert(ctx context.Context, data *entity.Category) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
if data.ParentID == nil {
data.ParentID = &gocql.UUID{}
}
// 設置時間戳
data.SetTimestamps()
// 如果是新分類，生成 ID
if data.IsNew() {
data.ID = gocql.TimeUUID()
}
// Slug 轉為小寫
data.Slug = strings.ToLower(strings.TrimSpace(data.Slug))
return r.repo.Insert(ctx, data)
}
// FindOne 根據 ID 查詢單筆分類
func (r *CategoryRepository) FindOne(ctx context.Context, id string) (*entity.Category, error) {
var zeroUUID gocql.UUID
uuid, err := gocql.ParseUUID(id)
if err != nil {
return nil, err
}
if uuid == zeroUUID {
return nil, ErrInvalidInput
}
category, err := r.repo.Get(ctx, id)
if err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to find category: %w", err)
}
return category, nil
}
// Update 更新分類
func (r *CategoryRepository) Update(ctx context.Context, data *entity.Category) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 更新時間戳
data.SetTimestamps()
// Slug 轉為小寫
data.Slug = strings.ToLower(strings.TrimSpace(data.Slug))
return r.repo.Update(ctx, data)
}
// Delete 刪除分類
func (r *CategoryRepository) Delete(ctx context.Context, id string) error {
var zeroUUID gocql.UUID
uuid, err := gocql.ParseUUID(id)
if err != nil {
return err
}
if uuid == zeroUUID {
return ErrInvalidInput
}
return r.repo.Delete(ctx, id)
}
// FindBySlug 根據 slug 查詢分類
func (r *CategoryRepository) FindBySlug(ctx context.Context, slug string) (*entity.Category, error) {
if slug == "" {
return nil, ErrInvalidInput
}
// 標準化 slug
slug = strings.ToLower(strings.TrimSpace(slug))
// 構建查詢（要有 SAI 索引在 slug 欄位上）
query := r.repo.Query().Where(cassandra.Eq("slug", slug))
var categories []*entity.Category
if err := query.Scan(ctx, &categories); err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to query category: %w", err)
}
if len(categories) == 0 {
return nil, ErrNotFound
}
return categories[0], nil
}
// FindByParentID 根據父分類 ID 查詢子分類
func (r *CategoryRepository) FindByParentID(ctx context.Context, parentID string) ([]*entity.Category, error) {
query := r.repo.Query()
var zeroUUID gocql.UUID
if parentID != "" {
// 構建查詢（有 SAI 索引在 parentID 欄位上）
uuid, err := gocql.ParseUUID(parentID)
if err != nil {
return nil, err
}
if uuid != zeroUUID {
query = query.Where(cassandra.Eq("parent_id", uuid))
}
} else {
query = query.Where(cassandra.Eq("parent_id", zeroUUID))
}
// 按 sort_order 排序
query = query.OrderBy("sort_order", cassandra.ASC)
var categories []*entity.Category
if err := query.Scan(ctx, &categories); err != nil {
return nil, fmt.Errorf("failed to query categories: %w", err)
}
return categories, nil
}
// FindRootCategories 查詢根分類
func (r *CategoryRepository) FindRootCategories(ctx context.Context) ([]*entity.Category, error) {
return r.FindByParentID(ctx, "")
}
// FindActive 查詢啟用的分類
func (r *CategoryRepository) FindActive(ctx context.Context) ([]*entity.Category, error) {
query := r.repo.Query().
Where(cassandra.Eq("is_active", true)).
OrderBy("sort_order", cassandra.ASC)
var categories []*entity.Category
if err := query.Scan(ctx, &categories); err != nil {
return nil, fmt.Errorf("failed to query active categories: %w", err)
}
result := categories
return result, nil
}
// IncrementPostCount 增加貼文數（使用 counter 原子操作避免競爭條件）
// 注意：post_count 欄位必須是 counter 類型
func (r *CategoryRepository) IncrementPostCount(ctx context.Context, categoryID string) error {
uuid, err := gocql.ParseUUID(categoryID)
if err != nil {
return fmt.Errorf("%w: invalid category ID: %v", ErrInvalidInput, err)
}
// 使用 counter 原子更新操作：UPDATE categories SET post_count = post_count + 1 WHERE id = ?
var zeroCategory entity.Category
tableName := zeroCategory.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET post_count = post_count + 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(uuid)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to increment post count: %w", err)
}
return nil
}
// DecrementPostCount 減少貼文數（使用 counter 原子操作避免競爭條件）
// 注意：post_count 欄位必須是 counter 類型
func (r *CategoryRepository) DecrementPostCount(ctx context.Context, categoryID string) error {
uuid, err := gocql.ParseUUID(categoryID)
if err != nil {
return fmt.Errorf("%w: invalid category ID: %v", ErrInvalidInput, err)
}
// 使用 counter 原子更新操作：UPDATE categories SET post_count = post_count - 1 WHERE id = ?
var zeroCategory entity.Category
tableName := zeroCategory.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET post_count = post_count - 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(uuid)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to decrement post count: %w", err)
}
return nil
}

383
pkg/post/repository/comment.go
View File

@ -1,383 +0,0 @@
package repository
import (
"context"
"fmt"
"backend/pkg/library/cassandra"
"backend/pkg/post/domain/entity"
"backend/pkg/post/domain/post"
domainRepo "backend/pkg/post/domain/repository"
"github.com/gocql/gocql"
)
// CommentRepositoryParam 定義 CommentRepository 的初始化參數
type CommentRepositoryParam struct {
DB *cassandra.DB
Keyspace string
}
// CommentRepository 實作 domain repository 介面
type CommentRepository struct {
repo cassandra.Repository[*entity.Comment]
db *cassandra.DB
keyspace string
}
// NewCommentRepository 創建新的 CommentRepository
func NewCommentRepository(param CommentRepositoryParam) domainRepo.CommentRepository {
repo, err := cassandra.NewRepository[*entity.Comment](param.DB, param.Keyspace)
if err != nil {
panic(fmt.Sprintf("failed to create comment repository: %v", err))
}
keyspace := param.Keyspace
if keyspace == "" {
keyspace = param.DB.GetDefaultKeyspace()
}
return &CommentRepository{
repo: repo,
db: param.DB,
keyspace: keyspace,
}
}
// Insert 插入單筆評論
func (r *CommentRepository) Insert(ctx context.Context, data *entity.Comment) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 設置時間戳
data.SetTimestamps()
// 如果是新評論，生成 ID
if data.IsNew() {
data.ID = gocql.TimeUUID()
}
return r.repo.Insert(ctx, data)
}
// FindOne 根據 ID 查詢單筆評論
func (r *CommentRepository) FindOne(ctx context.Context, id gocql.UUID) (*entity.Comment, error) {
var zeroUUID gocql.UUID
if id == zeroUUID {
return nil, ErrInvalidInput
}
comment, err := r.repo.Get(ctx, id)
if err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to find comment: %w", err)
}
return comment, nil
}
// Update 更新評論
func (r *CommentRepository) Update(ctx context.Context, data *entity.Comment) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 更新時間戳
data.SetTimestamps()
return r.repo.Update(ctx, data)
}
// Delete 刪除評論（軟刪除）
func (r *CommentRepository) Delete(ctx context.Context, id gocql.UUID) error {
var zeroUUID gocql.UUID
if id == zeroUUID {
return ErrInvalidInput
}
// 先查詢評論
comment, err := r.FindOne(ctx, id)
if err != nil {
return err
}
// 軟刪除：標記為已刪除
comment.Delete()
return r.Update(ctx, comment)
}
// FindByPostID 根據貼文 ID 查詢評論
func (r *CommentRepository) FindByPostID(ctx context.Context, postID gocql.UUID, params *domainRepo.CommentQueryParams) ([]*entity.Comment, int64, error) {
var zeroUUID gocql.UUID
if postID == zeroUUID {
return nil, 0, ErrInvalidInput
}
// 構建查詢（使用 PostID 作為 clustering key）
query := r.repo.Query().Where(cassandra.Eq("post_id", postID))
// 添加父評論過濾（如果指定，只查詢回覆）
if params != nil && params.ParentID != nil {
query = query.Where(cassandra.Eq("parent_id", *params.ParentID))
} else {
// 如果沒有指定 ParentID，只查詢頂層評論（parent_id 為 null）
// 注意：Cassandra 不支援直接查詢 null，需要特殊處理
// 這裡簡化處理，實際可能需要使用 Materialized View
}
// 添加狀態過濾
if params != nil && params.Status != nil {
query = query.Where(cassandra.Eq("status", *params.Status))
} else {
// 預設只查詢已發布的評論
published := post.CommentStatusPublished
query = query.Where(cassandra.Eq("status", published))
}
// 添加排序
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.ASC
if params != nil && params.OrderDirection == "DESC" {
order = cassandra.DESC
}
query = query.OrderBy(orderBy, order)
// 添加分頁
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
limit := int(pageSize)
query = query.Limit(limit)
// 執行查詢
var comments []*entity.Comment
if err := query.Scan(ctx, &comments); err != nil {
return nil, 0, fmt.Errorf("failed to query comments: %w", err)
}
result := comments
total := int64(len(result))
return result, total, nil
}
// FindByParentID 根據父評論 ID 查詢回覆
func (r *CommentRepository) FindByParentID(ctx context.Context, parentID gocql.UUID, params *domainRepo.CommentQueryParams) ([]*entity.Comment, int64, error) {
var zeroUUID gocql.UUID
if parentID == zeroUUID {
return nil, 0, ErrInvalidInput
}
query := r.repo.Query().Where(cassandra.Eq("parent_id", parentID))
// 添加狀態過濾
if params != nil && params.Status != nil {
query = query.Where(cassandra.Eq("status", *params.Status))
} else {
published := post.CommentStatusPublished
query = query.Where(cassandra.Eq("status", published))
}
// 添加排序和分頁
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.ASC
if params != nil && params.OrderDirection == "DESC" {
order = cassandra.DESC
}
query = query.OrderBy(orderBy, order)
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
query = query.Limit(int(pageSize))
var comments []*entity.Comment
if err := query.Scan(ctx, &comments); err != nil {
return nil, 0, fmt.Errorf("failed to query replies: %w", err)
}
return comments, int64(len(comments)), nil
}
// FindByAuthorUID 根據作者 UID 查詢評論
func (r *CommentRepository) FindByAuthorUID(ctx context.Context, authorUID string, params *domainRepo.CommentQueryParams) ([]*entity.Comment, int64, error) {
if authorUID == "" {
return nil, 0, ErrInvalidInput
}
query := r.repo.Query().Where(cassandra.Eq("author_uid", authorUID))
// 添加狀態過濾
if params != nil && params.Status != nil {
query = query.Where(cassandra.Eq("status", *params.Status))
}
// 添加排序和分頁
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.DESC
if params != nil && params.OrderDirection == "ASC" {
order = cassandra.ASC
}
query = query.OrderBy(orderBy, order)
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
query = query.Limit(int(pageSize))
var comments []*entity.Comment
if err := query.Scan(ctx, &comments); err != nil {
return nil, 0, fmt.Errorf("failed to query comments: %w", err)
}
return comments, int64(len(comments)), nil
}
// FindReplies 查詢指定評論的回覆
func (r *CommentRepository) FindReplies(ctx context.Context, commentID gocql.UUID, params *domainRepo.CommentQueryParams) ([]*entity.Comment, int64, error) {
return r.FindByParentID(ctx, commentID, params)
}
// IncrementLikeCount 增加按讚數（使用 counter 原子操作避免競爭條件）
// 注意：like_count 欄位必須是 counter 類型
func (r *CommentRepository) IncrementLikeCount(ctx context.Context, commentID gocql.UUID) error {
var zeroUUID gocql.UUID
if commentID == zeroUUID {
return ErrInvalidInput
}
var zeroComment entity.Comment
tableName := zeroComment.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET like_count = like_count + 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(commentID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to increment like count: %w", err)
}
return nil
}
// DecrementLikeCount 減少按讚數（使用 counter 原子操作避免競爭條件）
// 注意：like_count 欄位必須是 counter 類型
func (r *CommentRepository) DecrementLikeCount(ctx context.Context, commentID gocql.UUID) error {
var zeroUUID gocql.UUID
if commentID == zeroUUID {
return ErrInvalidInput
}
var zeroComment entity.Comment
tableName := zeroComment.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET like_count = like_count - 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(commentID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to decrement like count: %w", err)
}
return nil
}
// IncrementReplyCount 增加回覆數（使用 counter 原子操作避免競爭條件）
// 注意：reply_count 欄位必須是 counter 類型
func (r *CommentRepository) IncrementReplyCount(ctx context.Context, commentID gocql.UUID) error {
var zeroUUID gocql.UUID
if commentID == zeroUUID {
return ErrInvalidInput
}
var zeroComment entity.Comment
tableName := zeroComment.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET reply_count = reply_count + 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(commentID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to increment reply count: %w", err)
}
return nil
}
// DecrementReplyCount 減少回覆數（使用 counter 原子操作避免競爭條件）
// 注意：reply_count 欄位必須是 counter 類型
func (r *CommentRepository) DecrementReplyCount(ctx context.Context, commentID gocql.UUID) error {
var zeroUUID gocql.UUID
if commentID == zeroUUID {
return ErrInvalidInput
}
var zeroComment entity.Comment
tableName := zeroComment.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET reply_count = reply_count - 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(commentID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to decrement reply count: %w", err)
}
return nil
}
// UpdateStatus 更新評論狀態
func (r *CommentRepository) UpdateStatus(ctx context.Context, commentID gocql.UUID, status post.CommentStatus) error {
comment, err := r.FindOne(ctx, commentID)
if err != nil {
return err
}
comment.Status = status
return r.Update(ctx, comment)
}

34
pkg/post/repository/error.go
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@ -1,34 +0,0 @@
package repository
import (
"errors"
"backend/pkg/library/cassandra"
)
// Common repository errors
var (
// ErrNotFound is returned when a requested resource is not found
ErrNotFound = errors.New("resource not found")
// ErrInvalidInput is returned when input validation fails
ErrInvalidInput = errors.New("invalid input")
// ErrDuplicateKey is returned when attempting to insert a document with a duplicate key
ErrDuplicateKey = errors.New("duplicate key error")
)
// IsNotFound checks if the error is a not found error
func IsNotFound(err error) bool {
if err == nil {
return false
}
if err == ErrNotFound {
return true
}
if cassandra.IsNotFound(err) {
return true
}
return false
}

228
pkg/post/repository/like.go
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@ -1,228 +0,0 @@
package repository
import (
"context"
"fmt"
"backend/pkg/library/cassandra"
"backend/pkg/post/domain/entity"
domainRepo "backend/pkg/post/domain/repository"
"github.com/gocql/gocql"
)
// LikeRepositoryParam 定義 LikeRepository 的初始化參數
type LikeRepositoryParam struct {
DB *cassandra.DB
Keyspace string
}
// LikeRepository 實作 domain repository 介面
type LikeRepository struct {
repo cassandra.Repository[*entity.Like]
db *cassandra.DB
}
// NewLikeRepository 創建新的 LikeRepository
func NewLikeRepository(param LikeRepositoryParam) domainRepo.LikeRepository {
repo, err := cassandra.NewRepository[*entity.Like](param.DB, param.Keyspace)
if err != nil {
panic(fmt.Sprintf("failed to create like repository: %v", err))
}
return &LikeRepository{
repo: repo,
db: param.DB,
}
}
// Insert 插入單筆按讚
func (r *LikeRepository) Insert(ctx context.Context, data *entity.Like) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 設置時間戳
data.SetTimestamps()
// 如果是新按讚，生成 ID
if data.IsNew() {
data.ID = gocql.TimeUUID()
}
return r.repo.Insert(ctx, data)
}
// FindOne 根據 ID 查詢單筆按讚
func (r *LikeRepository) FindOne(ctx context.Context, id gocql.UUID) (*entity.Like, error) {
var zeroUUID gocql.UUID
if id == zeroUUID {
return nil, ErrInvalidInput
}
like, err := r.repo.Get(ctx, id)
if err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to find like: %w", err)
}
return like, nil
}
// Delete 刪除按讚
func (r *LikeRepository) Delete(ctx context.Context, id gocql.UUID) error {
var zeroUUID gocql.UUID
if id == zeroUUID {
return ErrInvalidInput
}
return r.repo.Delete(ctx, id)
}
// FindByTargetID 根據目標 ID 查詢按讚列表
func (r *LikeRepository) FindByTargetID(ctx context.Context, targetID gocql.UUID, targetType string) ([]*entity.Like, error) {
var zeroUUID gocql.UUID
if targetID == zeroUUID {
return nil, ErrInvalidInput
}
if targetType != "post" && targetType != "comment" {
return nil, ErrInvalidInput
}
// 構建查詢
query := r.repo.Query().
Where(cassandra.Eq("target_id", targetID)).
Where(cassandra.Eq("target_type", targetType)).
OrderBy("created_at", cassandra.DESC)
var likes []*entity.Like
if err := query.Scan(ctx, &likes); err != nil {
return nil, fmt.Errorf("failed to query likes: %w", err)
}
return likes, nil
}
// FindByUserUID 根據用戶 UID 查詢按讚列表
func (r *LikeRepository) FindByUserUID(ctx context.Context, userUID string, params *domainRepo.LikeQueryParams) ([]*entity.Like, int64, error) {
if userUID == "" {
return nil, 0, ErrInvalidInput
}
query := r.repo.Query().Where(cassandra.Eq("user_uid", userUID))
// 添加目標類型過濾
if params != nil && params.TargetType != nil {
query = query.Where(cassandra.Eq("target_type", *params.TargetType))
}
// 添加目標 ID 過濾
if params != nil && params.TargetID != nil {
query = query.Where(cassandra.Eq("target_id", *params.TargetID))
}
// 添加排序
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.DESC
if params != nil && params.OrderDirection == "ASC" {
order = cassandra.ASC
}
query = query.OrderBy(orderBy, order)
// 添加分頁
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
query = query.Limit(int(pageSize))
var likes []*entity.Like
if err := query.Scan(ctx, &likes); err != nil {
return nil, 0, fmt.Errorf("failed to query likes: %w", err)
}
result := likes
return result, int64(len(result)), nil
}
// FindByTargetAndUser 根據目標和用戶查詢按讚
func (r *LikeRepository) FindByTargetAndUser(ctx context.Context, targetID gocql.UUID, userUID string, targetType string) (*entity.Like, error) {
var zeroUUID gocql.UUID
if targetID == zeroUUID || userUID == "" {
return nil, ErrInvalidInput
}
if targetType != "post" && targetType != "comment" {
return nil, ErrInvalidInput
}
// 構建查詢
query := r.repo.Query().
Where(cassandra.Eq("target_id", targetID)).
Where(cassandra.Eq("user_uid", userUID)).
Where(cassandra.Eq("target_type", targetType)).
Limit(1)
var likes []*entity.Like
if err := query.Scan(ctx, &likes); err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to query like: %w", err)
}
if len(likes) == 0 {
return nil, ErrNotFound
}
return likes[0], nil
}
// CountByTargetID 計算目標的按讚數
func (r *LikeRepository) CountByTargetID(ctx context.Context, targetID gocql.UUID, targetType string) (int64, error) {
var zeroUUID gocql.UUID
if targetID == zeroUUID {
return 0, ErrInvalidInput
}
if targetType != "post" && targetType != "comment" {
return 0, ErrInvalidInput
}
// 構建查詢
query := r.repo.Query().
Where(cassandra.Eq("target_id", targetID)).
Where(cassandra.Eq("target_type", targetType))
count, err := query.Count(ctx)
if err != nil {
return 0, fmt.Errorf("failed to count likes: %w", err)
}
return count, nil
}
// DeleteByTargetAndUser 根據目標和用戶刪除按讚
func (r *LikeRepository) DeleteByTargetAndUser(ctx context.Context, targetID gocql.UUID, userUID string, targetType string) error {
// 先查詢按讚
like, err := r.FindByTargetAndUser(ctx, targetID, userUID, targetType)
if err != nil {
return err
}
// 刪除按讚
return r.Delete(ctx, like.ID)
}

511
pkg/post/repository/post.go
View File

@ -1,511 +0,0 @@
package repository
import (
"context"
"fmt"
"math"
"backend/pkg/library/cassandra"
"backend/pkg/post/domain/entity"
"backend/pkg/post/domain/post"
domainRepo "backend/pkg/post/domain/repository"
"github.com/gocql/gocql"
)
// PostRepositoryParam 定義 PostRepository 的初始化參數
type PostRepositoryParam struct {
DB *cassandra.DB
Keyspace string
}
// PostRepository 實作 domain repository 介面
type PostRepository struct {
repo cassandra.Repository[*entity.Post]
db *cassandra.DB
keyspace string
}
// NewPostRepository 創建新的 PostRepository
func NewPostRepository(param PostRepositoryParam) domainRepo.PostRepository {
repo, err := cassandra.NewRepository[*entity.Post](param.DB, param.Keyspace)
if err != nil {
panic(fmt.Sprintf("failed to create post repository: %v", err))
}
keyspace := param.Keyspace
if keyspace == "" {
keyspace = param.DB.GetDefaultKeyspace()
}
return &PostRepository{
repo: repo,
db: param.DB,
keyspace: keyspace,
}
}
// Insert 插入單筆貼文
func (r *PostRepository) Insert(ctx context.Context, data *entity.Post) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 設置時間戳
data.SetTimestamps()
// 如果是新貼文，生成 ID
if data.IsNew() {
data.ID = gocql.TimeUUID()
}
// 如果狀態是 published，設置發布時間
if data.Status == post.PostStatusPublished && data.PublishedAt == nil {
now := data.CreatedAt
data.PublishedAt = &now
}
return r.repo.Insert(ctx, data)
}
// FindOne 根據 ID 查詢單筆貼文
func (r *PostRepository) FindOne(ctx context.Context, id gocql.UUID) (*entity.Post, error) {
var zeroUUID gocql.UUID
if id == zeroUUID {
return nil, ErrInvalidInput
}
post, err := r.repo.Get(ctx, id)
if err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to find post: %w", err)
}
return post, nil
}
// Update 更新貼文
func (r *PostRepository) Update(ctx context.Context, data *entity.Post) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 更新時間戳
data.SetTimestamps()
return r.repo.Update(ctx, data)
}
// Delete 刪除貼文（軟刪除）
func (r *PostRepository) Delete(ctx context.Context, id gocql.UUID) error {
var zeroUUID gocql.UUID
if id == zeroUUID {
return ErrInvalidInput
}
// 先查詢貼文
post, err := r.FindOne(ctx, id)
if err != nil {
return err
}
// 軟刪除：標記為已刪除
post.Delete()
return r.Update(ctx, post)
}
// FindByAuthorUID 根據作者 UID 查詢貼文
func (r *PostRepository) FindByAuthorUID(ctx context.Context, authorUID string, params *domainRepo.PostQueryParams) ([]*entity.Post, int64, error) {
if authorUID == "" {
return nil, 0, ErrInvalidInput
}
// 構建查詢
query := r.repo.Query().Where(cassandra.Eq("author_uid", authorUID))
// 添加狀態過濾
if params != nil && params.Status != nil {
query = query.Where(cassandra.Eq("status", *params.Status))
}
// 添加排序
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.DESC
if params != nil && params.OrderDirection == "ASC" {
order = cassandra.ASC
}
query = query.OrderBy(orderBy, order)
// 添加分頁
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
pageIndex := int64(1)
if params != nil && params.PageIndex > 0 {
pageIndex = params.PageIndex
}
limit := int(pageSize)
query = query.Limit(limit)
// 執行查詢
var posts []*entity.Post
if err := query.Scan(ctx, &posts); err != nil {
return nil, 0, fmt.Errorf("failed to query posts: %w", err)
}
result := posts
// 計算總數（簡化實作，實際應該使用 COUNT 查詢）
total := int64(len(posts))
if params != nil && params.PageIndex > 1 {
// 這裡應該執行 COUNT 查詢，但為了簡化，我們假設有更多結果
total = pageSize * pageIndex
}
return result, total, nil
}
// FindByCategoryID 根據分類 ID 查詢貼文
func (r *PostRepository) FindByCategoryID(ctx context.Context, categoryID gocql.UUID, params *domainRepo.PostQueryParams) ([]*entity.Post, int64, error) {
var zeroUUID gocql.UUID
if categoryID == zeroUUID {
return nil, 0, ErrInvalidInput
}
// 構建查詢
query := r.repo.Query().Where(cassandra.Eq("category_id", categoryID))
// 添加狀態過濾
if params != nil && params.Status != nil {
query = query.Where(cassandra.Eq("status", *params.Status))
}
// 添加排序和分頁（類似 FindByAuthorUID）
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.DESC
if params != nil && params.OrderDirection == "ASC" {
order = cassandra.ASC
}
query = query.OrderBy(orderBy, order)
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
limit := int(pageSize)
query = query.Limit(limit)
var posts []*entity.Post
if err := query.Scan(ctx, &posts); err != nil {
return nil, 0, fmt.Errorf("failed to query posts: %w", err)
}
result := posts
total := int64(len(posts))
return result, total, nil
}
// FindByTag 根據標籤查詢貼文
func (r *PostRepository) FindByTag(ctx context.Context, tagName string, params *domainRepo.PostQueryParams) ([]*entity.Post, int64, error) {
if tagName == "" {
return nil, 0, ErrInvalidInput
}
// 構建查詢（注意：Cassandra 的集合查詢需要使用 CONTAINS，這裡簡化處理）
// 實際實作中，可能需要使用 SAI 索引或 Materialized View
query := r.repo.Query()
// 添加狀態過濾
if params != nil && params.Status != nil {
query = query.Where(cassandra.Eq("status", *params.Status))
}
// 添加排序和分頁
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.DESC
if params != nil && params.OrderDirection == "ASC" {
order = cassandra.ASC
}
query = query.OrderBy(orderBy, order)
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
limit := int(pageSize)
query = query.Limit(limit)
var posts []*entity.Post
if err := query.Scan(ctx, &posts); err != nil {
return nil, 0, fmt.Errorf("failed to query posts: %w", err)
}
// 過濾包含指定標籤的貼文
filtered := make([]*entity.Post, 0)
for _, p := range posts {
for _, tag := range p.Tags {
if tag == tagName {
filtered = append(filtered, p)
break
}
}
}
total := int64(len(filtered))
return filtered, total, nil
}
// FindPinnedPosts 查詢置頂貼文
func (r *PostRepository) FindPinnedPosts(ctx context.Context, limit int64) ([]*entity.Post, error) {
query := r.repo.Query().
Where(cassandra.Eq("is_pinned", true)).
Where(cassandra.Eq("status", post.PostStatusPublished)).
OrderBy("pinned_at", cassandra.DESC).
Limit(int(limit))
var posts []*entity.Post
if err := query.Scan(ctx, &posts); err != nil {
return nil, fmt.Errorf("failed to query pinned posts: %w", err)
}
return posts, nil
}
// FindByStatus 根據狀態查詢貼文
func (r *PostRepository) FindByStatus(ctx context.Context, status post.Status, params *domainRepo.PostQueryParams) ([]*entity.Post, int64, error) {
query := r.repo.Query().Where(cassandra.Eq("status", status))
// 添加排序和分頁
orderBy := "created_at"
if params != nil && params.OrderBy != "" {
orderBy = params.OrderBy
}
order := cassandra.DESC
if params != nil && params.OrderDirection == "ASC" {
order = cassandra.ASC
}
query = query.OrderBy(orderBy, order)
pageSize := int64(20)
if params != nil && params.PageSize > 0 {
pageSize = params.PageSize
}
limit := int(pageSize)
query = query.Limit(limit)
var posts []*entity.Post
if err := query.Scan(ctx, &posts); err != nil {
return nil, 0, fmt.Errorf("failed to query posts: %w", err)
}
result := posts
total := int64(len(posts))
return result, total, nil
}
// IncrementLikeCount 增加按讚數（使用 counter 原子操作避免競爭條件）
// 注意：like_count 欄位必須是 counter 類型
func (r *PostRepository) IncrementLikeCount(ctx context.Context, postID gocql.UUID) error {
var zeroUUID gocql.UUID
if postID == zeroUUID {
return ErrInvalidInput
}
var zeroPost entity.Post
tableName := zeroPost.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET like_count = like_count + 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(postID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to increment like count: %w", err)
}
return nil
}
// DecrementLikeCount 減少按讚數（使用 counter 原子操作避免競爭條件）
// 注意：like_count 欄位必須是 counter 類型
func (r *PostRepository) DecrementLikeCount(ctx context.Context, postID gocql.UUID) error {
var zeroUUID gocql.UUID
if postID == zeroUUID {
return ErrInvalidInput
}
var zeroPost entity.Post
tableName := zeroPost.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET like_count = like_count - 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(postID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to decrement like count: %w", err)
}
return nil
}
// IncrementCommentCount 增加評論數（使用 counter 原子操作避免競爭條件）
// 注意：comment_count 欄位必須是 counter 類型
func (r *PostRepository) IncrementCommentCount(ctx context.Context, postID gocql.UUID) error {
var zeroUUID gocql.UUID
if postID == zeroUUID {
return ErrInvalidInput
}
var zeroPost entity.Post
tableName := zeroPost.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET comment_count = comment_count + 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(postID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to increment comment count: %w", err)
}
return nil
}
// DecrementCommentCount 減少評論數（使用 counter 原子操作避免競爭條件）
// 注意：comment_count 欄位必須是 counter 類型
func (r *PostRepository) DecrementCommentCount(ctx context.Context, postID gocql.UUID) error {
var zeroUUID gocql.UUID
if postID == zeroUUID {
return ErrInvalidInput
}
var zeroPost entity.Post
tableName := zeroPost.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET comment_count = comment_count - 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(postID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to decrement comment count: %w", err)
}
return nil
}
// IncrementViewCount 增加瀏覽數（使用 counter 原子操作避免競爭條件）
// 注意：view_count 欄位必須是 counter 類型
func (r *PostRepository) IncrementViewCount(ctx context.Context, postID gocql.UUID) error {
var zeroUUID gocql.UUID
if postID == zeroUUID {
return ErrInvalidInput
}
var zeroPost entity.Post
tableName := zeroPost.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET view_count = view_count + 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(postID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to increment view count: %w", err)
}
return nil
}
// UpdateStatus 更新貼文狀態
func (r *PostRepository) UpdateStatus(ctx context.Context, postID gocql.UUID, status post.Status) error {
postEntity, err := r.FindOne(ctx, postID)
if err != nil {
return err
}
postEntity.Status = status
publishedStatus := post.PostStatusPublished
if status == publishedStatus && postEntity.PublishedAt == nil {
now := postEntity.UpdatedAt
postEntity.PublishedAt = &now
}
return r.Update(ctx, postEntity)
}
// PinPost 置頂貼文
func (r *PostRepository) PinPost(ctx context.Context, postID gocql.UUID) error {
post, err := r.FindOne(ctx, postID)
if err != nil {
return err
}
post.Pin()
return r.Update(ctx, post)
}
// UnpinPost 取消置頂
func (r *PostRepository) UnpinPost(ctx context.Context, postID gocql.UUID) error {
post, err := r.FindOne(ctx, postID)
if err != nil {
return err
}
post.Unpin()
return r.Update(ctx, post)
}
// calculateTotalPages 計算總頁數
func calculateTotalPages(total, pageSize int64) int64 {
if pageSize <= 0 {
return 0
}
return int64(math.Ceil(float64(total) / float64(pageSize)))
}

250
pkg/post/repository/tag.go
View File

@ -1,250 +0,0 @@
package repository
import (
"context"
"fmt"
"strings"
"backend/pkg/library/cassandra"
"backend/pkg/post/domain/entity"
domainRepo "backend/pkg/post/domain/repository"
"github.com/gocql/gocql"
)
// TagRepositoryParam 定義 TagRepository 的初始化參數
type TagRepositoryParam struct {
DB *cassandra.DB
Keyspace string
}
// TagRepository 實作 domain repository 介面
type TagRepository struct {
repo cassandra.Repository[*entity.Tag]
db *cassandra.DB
keyspace string
}
// NewTagRepository 創建新的 TagRepository
func NewTagRepository(param TagRepositoryParam) domainRepo.TagRepository {
repo, err := cassandra.NewRepository[*entity.Tag](param.DB, param.Keyspace)
if err != nil {
panic(fmt.Sprintf("failed to create tag repository: %v", err))
}
keyspace := param.Keyspace
if keyspace == "" {
keyspace = param.DB.GetDefaultKeyspace()
}
return &TagRepository{
repo: repo,
db: param.DB,
keyspace: keyspace,
}
}
// Insert 插入單筆標籤
func (r *TagRepository) Insert(ctx context.Context, data *entity.Tag) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 設置時間戳
data.SetTimestamps()
// 如果是新標籤，生成 ID
if data.IsNew() {
data.ID = gocql.TimeUUID()
}
// 標籤名稱轉為小寫（統一格式）
data.Name = strings.ToLower(strings.TrimSpace(data.Name))
return r.repo.Insert(ctx, data)
}
// FindOne 根據 ID 查詢單筆標籤
func (r *TagRepository) FindOne(ctx context.Context, id gocql.UUID) (*entity.Tag, error) {
var zeroUUID gocql.UUID
if id == zeroUUID {
return nil, ErrInvalidInput
}
tag, err := r.repo.Get(ctx, id)
if err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to find tag: %w", err)
}
return tag, nil
}
// Update 更新標籤
func (r *TagRepository) Update(ctx context.Context, data *entity.Tag) error {
if data == nil {
return ErrInvalidInput
}
// 驗證資料
if err := data.Validate(); err != nil {
return fmt.Errorf("%w: %v", ErrInvalidInput, err)
}
// 更新時間戳
data.SetTimestamps()
// 標籤名稱轉為小寫
data.Name = strings.ToLower(strings.TrimSpace(data.Name))
return r.repo.Update(ctx, data)
}
// Delete 刪除標籤
func (r *TagRepository) Delete(ctx context.Context, id gocql.UUID) error {
var zeroUUID gocql.UUID
if id == zeroUUID {
return ErrInvalidInput
}
return r.repo.Delete(ctx, id)
}
// FindByName 根據名稱查詢標籤
func (r *TagRepository) FindByName(ctx context.Context, name string) (*entity.Tag, error) {
if name == "" {
return nil, ErrInvalidInput
}
// 標準化名稱
name = strings.ToLower(strings.TrimSpace(name))
// 構建查詢（假設有 SAI 索引在 name 欄位上）
query := r.repo.Query().Where(cassandra.Eq("name", name))
var tags []*entity.Tag
if err := query.Scan(ctx, &tags); err != nil {
if cassandra.IsNotFound(err) {
return nil, ErrNotFound
}
return nil, fmt.Errorf("failed to query tag: %w", err)
}
if len(tags) == 0 {
return nil, ErrNotFound
}
return tags[0], nil
}
// FindByNames 根據名稱列表查詢標籤
func (r *TagRepository) FindByNames(ctx context.Context, names []string) ([]*entity.Tag, error) {
if len(names) == 0 {
return []*entity.Tag{}, nil
}
// 標準化名稱
normalizedNames := make([]string, len(names))
for i, name := range names {
normalizedNames[i] = strings.ToLower(strings.TrimSpace(name))
}
// 構建查詢（使用 IN 條件）
query := r.repo.Query().Where(cassandra.In("name", toAnySlice(normalizedNames)))
var tags []*entity.Tag
if err := query.Scan(ctx, &tags); err != nil {
return nil, fmt.Errorf("failed to query tags: %w", err)
}
return tags, nil
}
// FindPopular 查詢熱門標籤
func (r *TagRepository) FindPopular(ctx context.Context, limit int64) ([]*entity.Tag, error) {
// 構建查詢，按 post_count 降序排列
query := r.repo.Query().
OrderBy("post_count", cassandra.DESC).
Limit(int(limit))
var tags []*entity.Tag
if err := query.Scan(ctx, &tags); err != nil {
return nil, fmt.Errorf("failed to query popular tags: %w", err)
}
result := tags
return result, nil
}
// IncrementPostCount 增加貼文數（使用 counter 原子操作避免競爭條件）
// 注意：post_count 欄位必須是 counter 類型
func (r *TagRepository) IncrementPostCount(ctx context.Context, tagID gocql.UUID) error {
var zeroUUID gocql.UUID
if tagID == zeroUUID {
return ErrInvalidInput
}
// 使用 counter 原子更新操作：UPDATE tags SET post_count = post_count + 1 WHERE id = ?
var zeroTag entity.Tag
tableName := zeroTag.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET post_count = post_count + 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(tagID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to increment post count: %w", err)
}
return nil
}
// DecrementPostCount 減少貼文數（使用 counter 原子操作避免競爭條件）
// 注意：post_count 欄位必須是 counter 類型
func (r *TagRepository) DecrementPostCount(ctx context.Context, tagID gocql.UUID) error {
var zeroUUID gocql.UUID
if tagID == zeroUUID {
return ErrInvalidInput
}
// 使用 counter 原子更新操作：UPDATE tags SET post_count = post_count - 1 WHERE id = ?
var zeroTag entity.Tag
tableName := zeroTag.TableName()
if r.keyspace == "" {
return fmt.Errorf("%w: keyspace is required", ErrInvalidInput)
}
stmt := fmt.Sprintf("UPDATE %s.%s SET post_count = post_count - 1 WHERE id = ?", r.keyspace, tableName)
query := r.db.GetSession().Query(stmt, nil).
WithContext(ctx).
Consistency(gocql.Quorum).
Bind(tagID)
if err := query.ExecRelease(); err != nil {
return fmt.Errorf("failed to decrement post count: %w", err)
}
return nil
}
// toAnySlice 將 string slice 轉換為 []any
func toAnySlice(strs []string) []any {
result := make([]any, len(strs))
for i, s := range strs {
result[i] = s
}
return result
}

455
pkg/post/usecase/comment.go
View File

@ -1,455 +0,0 @@
package usecase
import (
"context"
"errors"
"fmt"
"math"
errs "backend/pkg/library/errors"
"backend/pkg/post/domain/entity"
"backend/pkg/post/domain/post"
domainRepo "backend/pkg/post/domain/repository"
domainUsecase "backend/pkg/post/domain/usecase"
"backend/pkg/post/repository"
"github.com/gocql/gocql"
)
// CommentUseCaseParam 定義 CommentUseCase 的初始化參數
type CommentUseCaseParam struct {
Comment domainRepo.CommentRepository
Post domainRepo.PostRepository
Like domainRepo.LikeRepository
Logger errs.Logger
}
// CommentUseCase 實作 domain usecase 介面
type CommentUseCase struct {
CommentUseCaseParam
}
// MustCommentUseCase 創建新的 CommentUseCase（如果失敗會 panic）
func MustCommentUseCase(param CommentUseCaseParam) domainUsecase.CommentUseCase {
return &CommentUseCase{
CommentUseCaseParam: param,
}
}
// CreateComment 創建新評論
func (uc *CommentUseCase) CreateComment(ctx context.Context, req domainUsecase.CreateCommentRequest) (*domainUsecase.CommentResponse, error) {
// 驗證輸入
if err := uc.validateCreateCommentRequest(req); err != nil {
return nil, err
}
// 驗證貼文存在
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return nil, errs.InputInvalidRangeError("post_id is required")
}
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return nil, errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return nil, uc.handleDBError("Post.FindOne", req, err)
}
// 檢查貼文是否可見
if !post.IsVisible() {
return nil, errs.ResNotFoundError("cannot comment on non-visible post")
}
// 建立評論實體
comment := &entity.Comment{
PostID: req.PostID,
AuthorUID: req.AuthorUID,
ParentID: req.ParentID,
Content: req.Content,
Status: post.CommentStatusPublished,
}
// 插入資料庫
if err := uc.Comment.Insert(ctx, comment); err != nil {
return nil, uc.handleDBError("Comment.Insert", req, err)
}
// 如果是回覆，增加父評論的回覆數
if req.ParentID != nil {
if err := uc.Comment.IncrementReplyCount(ctx, *req.ParentID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to increment reply count: %v", err))
}
}
// 增加貼文的評論數
if err := uc.Post.IncrementCommentCount(ctx, req.PostID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to increment comment count: %v", err))
}
return uc.mapCommentToResponse(comment), nil
}
// GetComment 取得評論
func (uc *CommentUseCase) GetComment(ctx context.Context, req domainUsecase.GetCommentRequest) (*domainUsecase.CommentResponse, error) {
// 驗證輸入
var zeroUUID gocql.UUID
if req.CommentID == zeroUUID {
return nil, errs.InputInvalidRangeError("comment_id is required")
}
// 查詢評論
comment, err := uc.Comment.FindOne(ctx, req.CommentID)
if err != nil {
if repository.IsNotFound(err) {
return nil, errs.ResNotFoundError(fmt.Sprintf("comment not found: %s", req.CommentID))
}
return nil, uc.handleDBError("Comment.FindOne", req, err)
}
return uc.mapCommentToResponse(comment), nil
}
// UpdateComment 更新評論
func (uc *CommentUseCase) UpdateComment(ctx context.Context, req domainUsecase.UpdateCommentRequest) (*domainUsecase.CommentResponse, error) {
// 驗證輸入
var zeroUUID gocql.UUID
if req.CommentID == zeroUUID {
return nil, errs.InputInvalidRangeError("comment_id is required")
}
if req.AuthorUID == "" {
return nil, errs.InputInvalidRangeError("author_uid is required")
}
if req.Content == "" {
return nil, errs.InputInvalidRangeError("content is required")
}
// 查詢現有評論
comment, err := uc.Comment.FindOne(ctx, req.CommentID)
if err != nil {
if repository.IsNotFound(err) {
return nil, errs.ResNotFoundError(fmt.Sprintf("comment not found: %s", req.CommentID))
}
return nil, uc.handleDBError("Comment.FindOne", req, err)
}
// 驗證權限
if comment.AuthorUID != req.AuthorUID {
return nil, errs.ResNotFoundError("not authorized to update this comment")
}
// 檢查是否可見
if !comment.IsVisible() {
return nil, errs.ResNotFoundError("comment is not visible")
}
// 更新內容
comment.Content = req.Content
// 更新資料庫
if err := uc.Comment.Update(ctx, comment); err != nil {
return nil, uc.handleDBError("Comment.Update", req, err)
}
return uc.mapCommentToResponse(comment), nil
}
// DeleteComment 刪除評論（軟刪除）
func (uc *CommentUseCase) DeleteComment(ctx context.Context, req domainUsecase.DeleteCommentRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.CommentID == zeroUUID {
return errs.InputInvalidRangeError("comment_id is required")
}
if req.AuthorUID == "" {
return errs.InputInvalidRangeError("author_uid is required")
}
// 查詢評論
comment, err := uc.Comment.FindOne(ctx, req.CommentID)
if err != nil {
if repository.IsNotFound(err) {
return errs.ResNotFoundError(fmt.Sprintf("comment not found: %s", req.CommentID))
}
return uc.handleDBError("Comment.FindOne", req, err)
}
// 驗證權限
if comment.AuthorUID != req.AuthorUID {
return errs.ResNotFoundError("not authorized to delete this comment")
}
// 刪除評論
if err := uc.Comment.Delete(ctx, req.CommentID); err != nil {
return uc.handleDBError("Comment.Delete", req, err)
}
// 如果是回覆，減少父評論的回覆數
if comment.ParentID != nil {
if err := uc.Comment.DecrementReplyCount(ctx, *comment.ParentID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to decrement reply count: %v", err))
}
}
// 減少貼文的評論數
if err := uc.Post.DecrementCommentCount(ctx, comment.PostID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to decrement comment count: %v", err))
}
return nil
}
// ListComments 列出評論
func (uc *CommentUseCase) ListComments(ctx context.Context, req domainUsecase.ListCommentsRequest) (*domainUsecase.ListCommentsResponse, error) {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return nil, errs.InputInvalidRangeError("post_id is required")
}
if req.PageSize <= 0 {
req.PageSize = 20
}
if req.PageIndex <= 0 {
req.PageIndex = 1
}
// 構建查詢參數
params := &domainRepo.CommentQueryParams{
PostID: &req.PostID,
ParentID: req.ParentID,
PageSize: req.PageSize,
PageIndex: req.PageIndex,
OrderBy: req.OrderBy,
OrderDirection: req.OrderDirection,
}
// 如果 OrderBy 未指定，預設為 created_at
if params.OrderBy == "" {
params.OrderBy = "created_at"
}
// 如果 OrderDirection 未指定，預設為 ASC
if params.OrderDirection == "" {
params.OrderDirection = "ASC"
}
// 執行查詢
comments, total, err := uc.Comment.FindByPostID(ctx, req.PostID, params)
if err != nil {
return nil, uc.handleDBError("Comment.FindByPostID", req, err)
}
// 轉換為 Response
responses := make([]domainUsecase.CommentResponse, len(comments))
for i, c := range comments {
responses[i] = *uc.mapCommentToResponse(c)
}
return &domainUsecase.ListCommentsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: req.PageIndex,
PageSize: req.PageSize,
Total: total,
TotalPage: calculateTotalPages(total, req.PageSize),
},
}, nil
}
// ListReplies 列出回覆
func (uc *CommentUseCase) ListReplies(ctx context.Context, req domainUsecase.ListRepliesRequest) (*domainUsecase.ListCommentsResponse, error) {
// 驗證輸入
var zeroUUID gocql.UUID
if req.CommentID == zeroUUID {
return nil, errs.InputInvalidRangeError("comment_id is required")
}
if req.PageSize <= 0 {
req.PageSize = 20
}
if req.PageIndex <= 0 {
req.PageIndex = 1
}
// 構建查詢參數
params := &domainRepo.CommentQueryParams{
PageSize: req.PageSize,
PageIndex: req.PageIndex,
OrderBy: "created_at",
OrderDirection: "ASC",
}
// 執行查詢
comments, total, err := uc.Comment.FindReplies(ctx, req.CommentID, params)
if err != nil {
return nil, uc.handleDBError("Comment.FindReplies", req, err)
}
// 轉換為 Response
responses := make([]domainUsecase.CommentResponse, len(comments))
for i, c := range comments {
responses[i] = *uc.mapCommentToResponse(c)
}
return &domainUsecase.ListCommentsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: req.PageIndex,
PageSize: req.PageSize,
Total: total,
TotalPage: calculateTotalPages(total, req.PageSize),
},
}, nil
}
// ListCommentsByAuthor 根據作者列出評論
func (uc *CommentUseCase) ListCommentsByAuthor(ctx context.Context, req domainUsecase.ListCommentsByAuthorRequest) (*domainUsecase.ListCommentsResponse, error) {
if req.AuthorUID == "" {
return nil, errs.InputInvalidRangeError("author_uid is required")
}
if req.PageSize <= 0 {
req.PageSize = 20
}
if req.PageIndex <= 0 {
req.PageIndex = 1
}
params := &domainRepo.CommentQueryParams{
PageSize: req.PageSize,
PageIndex: req.PageIndex,
OrderBy: "created_at",
OrderDirection: "DESC",
}
comments, total, err := uc.Comment.FindByAuthorUID(ctx, req.AuthorUID, params)
if err != nil {
return nil, uc.handleDBError("Comment.FindByAuthorUID", req, err)
}
responses := make([]domainUsecase.CommentResponse, len(comments))
for i, c := range comments {
responses[i] = *uc.mapCommentToResponse(c)
}
return &domainUsecase.ListCommentsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: req.PageIndex,
PageSize: req.PageSize,
Total: total,
TotalPage: calculateTotalPages(total, req.PageSize),
},
}, nil
}
// LikeComment 按讚評論
func (uc *CommentUseCase) LikeComment(ctx context.Context, req domainUsecase.LikeCommentRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.CommentID == zeroUUID {
return errs.InputInvalidRangeError("comment_id is required")
}
if req.UserUID == "" {
return errs.InputInvalidRangeError("user_uid is required")
}
// 檢查是否已經按讚
existingLike, err := uc.Like.FindByTargetAndUser(ctx, req.CommentID, req.UserUID, "comment")
if err == nil && existingLike != nil {
// 已經按讚，直接返回成功
return nil
}
if err != nil && !repository.IsNotFound(err) {
return uc.handleDBError("Like.FindByTargetAndUser", req, err)
}
// 建立按讚記錄
like := &entity.Like{
TargetID: req.CommentID,
UserUID: req.UserUID,
TargetType: "comment",
}
if err := uc.Like.Insert(ctx, like); err != nil {
return uc.handleDBError("Like.Insert", req, err)
}
// 增加評論的按讚數
if err := uc.Comment.IncrementLikeCount(ctx, req.CommentID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to increment like count: %v", err))
}
return nil
}
// UnlikeComment 取消按讚評論
func (uc *CommentUseCase) UnlikeComment(ctx context.Context, req domainUsecase.UnlikeCommentRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.CommentID == zeroUUID {
return errs.InputInvalidRangeError("comment_id is required")
}
if req.UserUID == "" {
return errs.InputInvalidRangeError("user_uid is required")
}
// 刪除按讚記錄
if err := uc.Like.DeleteByTargetAndUser(ctx, req.CommentID, req.UserUID, "comment"); err != nil {
if repository.IsNotFound(err) {
// 已經取消按讚，直接返回成功
return nil
}
return uc.handleDBError("Like.DeleteByTargetAndUser", req, err)
}
// 減少評論的按讚數
if err := uc.Comment.DecrementLikeCount(ctx, req.CommentID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to decrement like count: %v", err))
}
return nil
}
// validateCreateCommentRequest 驗證建立評論請求
func (uc *CommentUseCase) validateCreateCommentRequest(req domainUsecase.CreateCommentRequest) error {
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
if req.AuthorUID == "" {
return errs.InputInvalidRangeError("author_uid is required")
}
if req.Content == "" {
return errs.InputInvalidRangeError("content is required")
}
return nil
}
// mapCommentToResponse 將 Comment 實體轉換為 CommentResponse
func (uc *CommentUseCase) mapCommentToResponse(comment *entity.Comment) *domainUsecase.CommentResponse {
return &domainUsecase.CommentResponse{
ID: comment.ID,
PostID: comment.PostID,
AuthorUID: comment.AuthorUID,
ParentID: comment.ParentID,
Content: comment.Content,
Status: comment.Status,
LikeCount: comment.LikeCount,
ReplyCount: comment.ReplyCount,
CreatedAt: comment.CreatedAt,
UpdatedAt: comment.UpdatedAt,
}
}
// handleDBError 處理資料庫錯誤
func (uc *CommentUseCase) handleDBError(funcName string, req any, err error) error {
return errs.DBErrorErrorL(
uc.Logger,
[]errs.LogField{
{Key: "func", Val: funcName},
{Key: "req", Val: req},
{Key: "error", Val: err.Error()},
},
fmt.Sprintf("database operation failed: %s", funcName),
).Wrap(err)
}

801
pkg/post/usecase/post.go
View File

@ -1,801 +0,0 @@
package usecase
import (
"context"
"errors"
"fmt"
"math"
errs "backend/pkg/library/errors"
"backend/pkg/post/domain/entity"
"backend/pkg/post/domain/post"
domainRepo "backend/pkg/post/domain/repository"
domainUsecase "backend/pkg/post/domain/usecase"
"backend/pkg/post/repository"
"github.com/gocql/gocql"
)
// PostUseCaseParam 定義 PostUseCase 的初始化參數
type PostUseCaseParam struct {
Post domainRepo.PostRepository
Comment domainRepo.CommentRepository
Like domainRepo.LikeRepository
Tag domainRepo.TagRepository
Category domainRepo.CategoryRepository
Logger errs.Logger
}
// PostUseCase 實作 domain usecase 介面
type PostUseCase struct {
PostUseCaseParam
}
// MustPostUseCase 創建新的 PostUseCase（如果失敗會 panic）
func MustPostUseCase(param PostUseCaseParam) domainUsecase.PostUseCase {
return &PostUseCase{
PostUseCaseParam: param,
}
}
// CreatePost 創建新貼文
func (uc *PostUseCase) CreatePost(ctx context.Context, req domainUsecase.CreatePostRequest) (*domainUsecase.PostResponse, error) {
// 驗證輸入
if err := uc.validateCreatePostRequest(req); err != nil {
return nil, err
}
// 建立貼文實體
post := &entity.Post{
AuthorUID: req.AuthorUID,
Title: req.Title,
Content: req.Content,
Type: req.Type,
CategoryID: req.CategoryID,
Tags: req.Tags,
Images: req.Images,
VideoURL: req.VideoURL,
LinkURL: req.LinkURL,
Status: req.Status,
}
// 如果狀態未指定，預設為草稿
if post.Status == 0 {
post.Status = post.PostStatusDraft
}
// 插入資料庫
if err := uc.Post.Insert(ctx, post); err != nil {
return nil, uc.handleDBError("Post.Insert", req, err)
}
// 處理標籤（更新標籤的貼文數）
if err := uc.updateTagPostCounts(ctx, req.Tags, true); err != nil {
// 記錄錯誤但不中斷流程
uc.Logger.Error(fmt.Sprintf("failed to update tag post counts: %v", err))
}
// 處理分類（更新分類的貼文數）
if req.CategoryID != nil {
if err := uc.Category.IncrementPostCount(ctx, *req.CategoryID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to increment category post count: %v", err))
}
}
return uc.mapPostToResponse(post), nil
}
// GetPost 取得貼文
func (uc *PostUseCase) GetPost(ctx context.Context, req domainUsecase.GetPostRequest) (*domainUsecase.PostResponse, error) {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return nil, errs.InputInvalidRangeError("post_id is required")
}
// 查詢貼文
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return nil, errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return nil, uc.handleDBError("Post.FindOne", req, err)
}
// 如果提供了 UserUID，增加瀏覽數
if req.UserUID != nil {
if err := uc.Post.IncrementViewCount(ctx, req.PostID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to increment view count: %v", err))
}
}
return uc.mapPostToResponse(post), nil
}
// UpdatePost 更新貼文
func (uc *PostUseCase) UpdatePost(ctx context.Context, req domainUsecase.UpdatePostRequest) (*domainUsecase.PostResponse, error) {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return nil, errs.InputInvalidRangeError("post_id is required")
}
if req.AuthorUID == "" {
return nil, errs.InputInvalidRangeError("author_uid is required")
}
// 查詢現有貼文
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return nil, errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return nil, uc.handleDBError("Post.FindOne", req, err)
}
// 驗證權限
if post.AuthorUID != req.AuthorUID {
return nil, errs.ResNotFoundError("not authorized to update this post")
}
// 檢查是否可編輯
if !post.IsEditable() {
return nil, errs.ResNotFoundError("post is not editable")
}
// 更新欄位
if req.Title != nil {
post.Title = *req.Title
}
if req.Content != nil {
post.Content = *req.Content
}
if req.Type != nil {
post.Type = *req.Type
}
if req.CategoryID != nil {
// 更新分類計數
if post.CategoryID != nil && *post.CategoryID != *req.CategoryID {
if err := uc.Category.DecrementPostCount(ctx, *post.CategoryID); err != nil {
uc.Logger.Error("failed to decrement category post count", errs.LogField{Key: "error", Val: err.Error()})
}
if err := uc.Category.IncrementPostCount(ctx, *req.CategoryID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to increment category post count: %v", err))
}
}
post.CategoryID = req.CategoryID
}
if req.Tags != nil {
// 更新標籤計數
oldTags := post.Tags
post.Tags = req.Tags
if err := uc.updateTagPostCountsDiff(ctx, oldTags, req.Tags); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to update tag post counts: %v", err))
}
}
if req.Images != nil {
post.Images = req.Images
}
if req.VideoURL != nil {
post.VideoURL = req.VideoURL
}
if req.LinkURL != nil {
post.LinkURL = req.LinkURL
}
// 更新資料庫
if err := uc.Post.Update(ctx, post); err != nil {
return nil, uc.handleDBError("Post.Update", req, err)
}
return uc.mapPostToResponse(post), nil
}
// DeletePost 刪除貼文（軟刪除）
func (uc *PostUseCase) DeletePost(ctx context.Context, req domainUsecase.DeletePostRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
if req.AuthorUID == "" {
return errs.InputInvalidRangeError("author_uid is required")
}
// 查詢貼文
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return uc.handleDBError("Post.FindOne", req, err)
}
// 驗證權限
if post.AuthorUID != req.AuthorUID {
return errs.ResNotFoundError("not authorized to delete this post")
}
// 刪除貼文
if err := uc.Post.Delete(ctx, req.PostID); err != nil {
return uc.handleDBError("Post.Delete", req, err)
}
// 更新標籤和分類計數
if len(post.Tags) > 0 {
if err := uc.updateTagPostCounts(ctx, post.Tags, false); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to update tag post counts: %v", err))
}
}
if post.CategoryID != nil {
if err := uc.Category.DecrementPostCount(ctx, *post.CategoryID); err != nil {
uc.Logger.Error("failed to decrement category post count", errs.LogField{Key: "error", Val: err.Error()})
}
}
return nil
}
// PublishPost 發布貼文
func (uc *PostUseCase) PublishPost(ctx context.Context, req domainUsecase.PublishPostRequest) (*domainUsecase.PostResponse, error) {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return nil, errs.InputInvalidRangeError("post_id is required")
}
if req.AuthorUID == "" {
return nil, errs.InputInvalidRangeError("author_uid is required")
}
// 查詢貼文
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return nil, errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return nil, uc.handleDBError("Post.FindOne", req, err)
}
// 驗證權限
if post.AuthorUID != req.AuthorUID {
return nil, errs.ResNotFoundError("not authorized to publish this post")
}
// 發布貼文
post.Publish()
// 更新資料庫
if err := uc.Post.Update(ctx, post); err != nil {
return nil, uc.handleDBError("Post.Update", req, err)
}
return uc.mapPostToResponse(post), nil
}
// ArchivePost 歸檔貼文
func (uc *PostUseCase) ArchivePost(ctx context.Context, req domainUsecase.ArchivePostRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
if req.AuthorUID == "" {
return errs.InputInvalidRangeError("author_uid is required")
}
// 查詢貼文
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return uc.handleDBError("Post.FindOne", req, err)
}
// 驗證權限
if post.AuthorUID != req.AuthorUID {
return errs.ResNotFoundError("not authorized to archive this post")
}
// 歸檔貼文
post.Archive()
// 更新資料庫
return uc.Post.Update(ctx, post)
}
// ListPosts 列出貼文
func (uc *PostUseCase) ListPosts(ctx context.Context, req domainUsecase.ListPostsRequest) (*domainUsecase.ListPostsResponse, error) {
// 驗證分頁參數
if req.PageSize <= 0 {
req.PageSize = 20
}
if req.PageIndex <= 0 {
req.PageIndex = 1
}
// 構建查詢參數
params := &domainRepo.PostQueryParams{
CategoryID: req.CategoryID,
Tag: req.Tag,
Status: req.Status,
Type: req.Type,
AuthorUID: req.AuthorUID,
CreateStartTime: req.CreateStartTime,
CreateEndTime: req.CreateEndTime,
PageSize: req.PageSize,
PageIndex: req.PageIndex,
OrderBy: req.OrderBy,
OrderDirection: req.OrderDirection,
}
// 執行查詢
var posts []*entity.Post
var total int64
var err error
if req.CategoryID != nil {
posts, total, err = uc.Post.FindByCategoryID(ctx, *req.CategoryID, params)
} else if req.Tag != nil {
posts, total, err = uc.Post.FindByTag(ctx, *req.Tag, params)
} else if req.AuthorUID != nil {
posts, total, err = uc.Post.FindByAuthorUID(ctx, *req.AuthorUID, params)
} else if req.Status != nil {
posts, total, err = uc.Post.FindByStatus(ctx, *req.Status, params)
} else {
// 預設查詢所有已發布的貼文
published := post.PostStatusPublished
params.Status = &published
posts, total, err = uc.Post.FindByStatus(ctx, published, params)
}
if err != nil {
return nil, uc.handleDBError("Post.FindBy*", req, err)
}
// 轉換為 Response
responses := make([]domainUsecase.PostResponse, len(posts))
for i, p := range posts {
responses[i] = *uc.mapPostToResponse(p)
}
return &domainUsecase.ListPostsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: req.PageIndex,
PageSize: req.PageSize,
Total: total,
TotalPage: calculateTotalPages(total, req.PageSize),
},
}, nil
}
// ListPostsByAuthor 根據作者列出貼文
func (uc *PostUseCase) ListPostsByAuthor(ctx context.Context, req domainUsecase.ListPostsByAuthorRequest) (*domainUsecase.ListPostsResponse, error) {
if req.AuthorUID == "" {
return nil, errs.InputInvalidRangeError("author_uid is required")
}
if req.PageSize <= 0 {
req.PageSize = 20
}
if req.PageIndex <= 0 {
req.PageIndex = 1
}
params := &domainRepo.PostQueryParams{
Status: req.Status,
PageSize: req.PageSize,
PageIndex: req.PageIndex,
OrderBy: "created_at",
OrderDirection: "DESC",
}
posts, total, err := uc.Post.FindByAuthorUID(ctx, req.AuthorUID, params)
if err != nil {
return nil, uc.handleDBError("Post.FindByAuthorUID", req, err)
}
responses := make([]domainUsecase.PostResponse, len(posts))
for i, p := range posts {
responses[i] = *uc.mapPostToResponse(p)
}
return &domainUsecase.ListPostsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: req.PageIndex,
PageSize: req.PageSize,
Total: total,
TotalPage: calculateTotalPages(total, req.PageSize),
},
}, nil
}
// ListPostsByCategory 根據分類列出貼文
func (uc *PostUseCase) ListPostsByCategory(ctx context.Context, req domainUsecase.ListPostsByCategoryRequest) (*domainUsecase.ListPostsResponse, error) {
var zeroUUID gocql.UUID
if req.CategoryID == zeroUUID {
return nil, errs.InputInvalidRangeError("category_id is required")
}
if req.PageSize <= 0 {
req.PageSize = 20
}
if req.PageIndex <= 0 {
req.PageIndex = 1
}
params := &domainRepo.PostQueryParams{
Status: req.Status,
PageSize: req.PageSize,
PageIndex: req.PageIndex,
OrderBy: "created_at",
OrderDirection: "DESC",
}
posts, total, err := uc.Post.FindByCategoryID(ctx, req.CategoryID, params)
if err != nil {
return nil, uc.handleDBError("Post.FindByCategoryID", req, err)
}
responses := make([]domainUsecase.PostResponse, len(posts))
for i, p := range posts {
responses[i] = *uc.mapPostToResponse(p)
}
return &domainUsecase.ListPostsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: req.PageIndex,
PageSize: req.PageSize,
Total: total,
TotalPage: calculateTotalPages(total, req.PageSize),
},
}, nil
}
// ListPostsByTag 根據標籤列出貼文
func (uc *PostUseCase) ListPostsByTag(ctx context.Context, req domainUsecase.ListPostsByTagRequest) (*domainUsecase.ListPostsResponse, error) {
if req.Tag == "" {
return nil, errs.InputInvalidRangeError("tag is required")
}
if req.PageSize <= 0 {
req.PageSize = 20
}
if req.PageIndex <= 0 {
req.PageIndex = 1
}
params := &domainRepo.PostQueryParams{
Status: req.Status,
PageSize: req.PageSize,
PageIndex: req.PageIndex,
OrderBy: "created_at",
OrderDirection: "DESC",
}
posts, total, err := uc.Post.FindByTag(ctx, req.Tag, params)
if err != nil {
return nil, uc.handleDBError("Post.FindByTag", req, err)
}
responses := make([]domainUsecase.PostResponse, len(posts))
for i, p := range posts {
responses[i] = *uc.mapPostToResponse(p)
}
return &domainUsecase.ListPostsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: req.PageIndex,
PageSize: req.PageSize,
Total: total,
TotalPage: calculateTotalPages(total, req.PageSize),
},
}, nil
}
// GetPinnedPosts 取得置頂貼文
func (uc *PostUseCase) GetPinnedPosts(ctx context.Context, req domainUsecase.GetPinnedPostsRequest) (*domainUsecase.ListPostsResponse, error) {
limit := int64(10)
if req.Limit > 0 {
limit = req.Limit
}
posts, err := uc.Post.FindPinnedPosts(ctx, limit)
if err != nil {
return nil, uc.handleDBError("Post.FindPinnedPosts", req, err)
}
responses := make([]domainUsecase.PostResponse, len(posts))
for i, p := range posts {
responses[i] = *uc.mapPostToResponse(p)
}
return &domainUsecase.ListPostsResponse{
Data: responses,
Page: domainUsecase.Pager{
PageIndex: 1,
PageSize: limit,
Total: int64(len(responses)),
TotalPage: 1,
},
}, nil
}
// LikePost 按讚貼文
func (uc *PostUseCase) LikePost(ctx context.Context, req domainUsecase.LikePostRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
if req.UserUID == "" {
return errs.InputInvalidRangeError("user_uid is required")
}
// 檢查是否已經按讚
existingLike, err := uc.Like.FindByTargetAndUser(ctx, req.PostID, req.UserUID, "post")
if err == nil && existingLike != nil {
// 已經按讚，直接返回成功
return nil
}
if err != nil && !repository.IsNotFound(err) {
return uc.handleDBError("Like.FindByTargetAndUser", req, err)
}
// 建立按讚記錄
like := &entity.Like{
TargetID: req.PostID,
UserUID: req.UserUID,
TargetType: "post",
}
if err := uc.Like.Insert(ctx, like); err != nil {
return uc.handleDBError("Like.Insert", req, err)
}
// 增加貼文的按讚數
if err := uc.Post.IncrementLikeCount(ctx, req.PostID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to increment like count: %v", err))
}
return nil
}
// UnlikePost 取消按讚
func (uc *PostUseCase) UnlikePost(ctx context.Context, req domainUsecase.UnlikePostRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
if req.UserUID == "" {
return errs.InputInvalidRangeError("user_uid is required")
}
// 刪除按讚記錄
if err := uc.Like.DeleteByTargetAndUser(ctx, req.PostID, req.UserUID, "post"); err != nil {
if repository.IsNotFound(err) {
// 已經取消按讚，直接返回成功
return nil
}
return uc.handleDBError("Like.DeleteByTargetAndUser", req, err)
}
// 減少貼文的按讚數
if err := uc.Post.DecrementLikeCount(ctx, req.PostID); err != nil {
uc.Logger.Error(fmt.Sprintf("failed to decrement like count: %v", err))
}
return nil
}
// ViewPost 瀏覽貼文（增加瀏覽數）
func (uc *PostUseCase) ViewPost(ctx context.Context, req domainUsecase.ViewPostRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
// 增加瀏覽數
if err := uc.Post.IncrementViewCount(ctx, req.PostID); err != nil {
return uc.handleDBError("Post.IncrementViewCount", req, err)
}
return nil
}
// PinPost 置頂貼文
func (uc *PostUseCase) PinPost(ctx context.Context, req domainUsecase.PinPostRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
if req.AuthorUID == "" {
return errs.InputInvalidRangeError("author_uid is required")
}
// 查詢貼文
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return uc.handleDBError("Post.FindOne", req, err)
}
// 驗證權限
if post.AuthorUID != req.AuthorUID {
return errs.ResNotFoundError("not authorized to pin this post")
}
// 置頂貼文
return uc.Post.PinPost(ctx, req.PostID)
}
// UnpinPost 取消置頂
func (uc *PostUseCase) UnpinPost(ctx context.Context, req domainUsecase.UnpinPostRequest) error {
// 驗證輸入
var zeroUUID gocql.UUID
if req.PostID == zeroUUID {
return errs.InputInvalidRangeError("post_id is required")
}
if req.AuthorUID == "" {
return errs.InputInvalidRangeError("author_uid is required")
}
// 查詢貼文
post, err := uc.Post.FindOne(ctx, req.PostID)
if err != nil {
if repository.IsNotFound(err) {
return errs.ResNotFoundError(fmt.Sprintf("post not found: %s", req.PostID))
}
return uc.handleDBError("Post.FindOne", req, err)
}
// 驗證權限
if post.AuthorUID != req.AuthorUID {
return errs.ResNotFoundError("not authorized to unpin this post")
}
// 取消置頂
return uc.Post.UnpinPost(ctx, req.PostID)
}
// validateCreatePostRequest 驗證建立貼文請求
func (uc *PostUseCase) validateCreatePostRequest(req domainUsecase.CreatePostRequest) error {
if req.AuthorUID == "" {
return errs.InputInvalidRangeError("author_uid is required")
}
if req.Title == "" {
return errs.InputInvalidRangeError("title is required")
}
if req.Content == "" {
return errs.InputInvalidRangeError("content is required")
}
if !req.Type.IsValid() {
return errs.InputInvalidRangeError("invalid post type")
}
return nil
}
// mapPostToResponse 將 Post 實體轉換為 PostResponse
func (uc *PostUseCase) mapPostToResponse(post *entity.Post) *domainUsecase.PostResponse {
return &domainUsecase.PostResponse{
ID: post.ID,
AuthorUID: post.AuthorUID,
Title: post.Title,
Content: post.Content,
Type: post.Type,
Status: post.Status,
CategoryID: post.CategoryID,
Tags: post.Tags,
Images: post.Images,
VideoURL: post.VideoURL,
LinkURL: post.LinkURL,
LikeCount: post.LikeCount,
CommentCount: post.CommentCount,
ViewCount: post.ViewCount,
IsPinned: post.IsPinned,
PinnedAt: post.PinnedAt,
PublishedAt: post.PublishedAt,
CreatedAt: post.CreatedAt,
UpdatedAt: post.UpdatedAt,
}
}
// handleDBError 處理資料庫錯誤
func (uc *PostUseCase) handleDBError(funcName string, req any, err error) error {
return errs.DBErrorErrorL(
uc.Logger,
[]errs.LogField{
{Key: "func", Val: funcName},
{Key: "req", Val: req},
{Key: "error", Val: err.Error()},
},
fmt.Sprintf("database operation failed: %s", funcName),
).Wrap(err)
}
// updateTagPostCounts 更新標籤的貼文數
func (uc *PostUseCase) updateTagPostCounts(ctx context.Context, tags []string, increment bool) error {
if len(tags) == 0 {
return nil
}
// 查詢或建立標籤
for _, tagName := range tags {
tag, err := uc.Tag.FindByName(ctx, tagName)
if err != nil {
if repository.IsNotFound(err) {
// 建立新標籤
newTag := &entity.Tag{
Name: tagName,
}
if err := uc.Tag.Insert(ctx, newTag); err != nil {
return fmt.Errorf("failed to create tag: %w", err)
}
tag = newTag
} else {
return fmt.Errorf("failed to find tag: %w", err)
}
}
// 更新計數
if increment {
if err := uc.Tag.IncrementPostCount(ctx, tag.ID); err != nil {
return fmt.Errorf("failed to increment tag count: %w", err)
}
} else {
if err := uc.Tag.DecrementPostCount(ctx, tag.ID); err != nil {
return fmt.Errorf("failed to decrement tag count: %w", err)
}
}
}
return nil
}
// updateTagPostCountsDiff 更新標籤計數（處理差異）
func (uc *PostUseCase) updateTagPostCountsDiff(ctx context.Context, oldTags, newTags []string) error {
// 找出新增和刪除的標籤
oldTagMap := make(map[string]bool)
for _, tag := range oldTags {
oldTagMap[tag] = true
}
newTagMap := make(map[string]bool)
for _, tag := range newTags {
newTagMap[tag] = true
}
// 新增的標籤
for _, tag := range newTags {
if !oldTagMap[tag] {
if err := uc.updateTagPostCounts(ctx, []string{tag}, true); err != nil {
return err
}
}
}
// 刪除的標籤
for _, tag := range oldTags {
if !newTagMap[tag] {
if err := uc.updateTagPostCounts(ctx, []string{tag}, false); err != nil {
return err
}
}
}
return nil
}
// calculateTotalPages 計算總頁數
func calculateTotalPages(total, pageSize int64) int64 {
if pageSize <= 0 {
return 0
}
return int64(math.Ceil(float64(total) / float64(pageSize)))
}