74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
package repository
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import (
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"chat/internal/domain/entity"
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"chat/internal/domain/repository"
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"chat/internal/library/cassandra"
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"context"
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"fmt"
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"math"
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)
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type messageRepository struct {
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repo cassandra.Repository[entity.Message]
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db *cassandra.DB
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}
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// NewMessageRepository 創建新的訊息 Repository
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func NewMessageRepository(db *cassandra.DB, keyspace string) (repository.MessageRepository, error) {
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repo, err := cassandra.NewRepository[entity.Message](db, keyspace)
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if err != nil {
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return nil, fmt.Errorf("failed to create message repository: %w", err)
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}
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return &messageRepository{
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repo: repo,
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db: db,
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}, nil
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}
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// Insert 插入訊息
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func (r *messageRepository) Insert(ctx context.Context, msg *entity.Message) error {
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return r.repo.Insert(ctx, *msg)
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}
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// ListByRoom 查詢房間訊息（分頁）
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func (r *messageRepository) ListByRoom(ctx context.Context, roomID string, bucketDay string, pageSize int, pageIndex int) ([]entity.Message, int64, error) {
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// 計算分頁
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if pageSize <= 0 {
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pageSize = 20
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}
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if pageIndex <= 0 {
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pageIndex = 1
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}
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// 構建查詢條件
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query := r.repo.Query().
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Where(cassandra.Eq("room_id", roomID)).
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Where(cassandra.Eq("bucket_day", bucketDay)).
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OrderBy("ts", cassandra.DESC).
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OrderBy("message_id", cassandra.DESC).
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Limit(pageSize)
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// 先查詢總數
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total, err := r.repo.Query().
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Where(cassandra.Eq("room_id", roomID)).
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Where(cassandra.Eq("bucket_day", bucketDay)).
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Count(ctx)
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if err != nil {
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return nil, 0, fmt.Errorf("failed to count messages: %w", err)
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}
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// 執行查詢
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var messages []entity.Message
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if err := query.Scan(ctx, &messages); err != nil {
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return nil, 0, fmt.Errorf("failed to query messages: %w", err)
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}
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// 計算總頁數
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totalPages := int64(math.Ceil(float64(total) / float64(pageSize)))
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return messages, totalPages, nil
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}
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