app-cloudep-tweeting-service/internal/logic/commentservice/new_comment_logic.go

package commentservicelogic

import (
	"app-cloudep-tweeting-service/gen_result/pb/tweeting"
	"app-cloudep-tweeting-service/internal/domain"
	model "app-cloudep-tweeting-service/internal/model/mongo"
	"app-cloudep-tweeting-service/internal/svc"
	"context"
	"errors"

	ers "code.30cm.net/digimon/library-go/errs"

	"github.com/zeromicro/go-zero/core/logx"
)

type NewCommentLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewNewCommentLogic(ctx context.Context, svcCtx *svc.ServiceContext) *NewCommentLogic {
	return &NewCommentLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

// 輸入的定義 -> 檢查用
type newCommentReq struct {
	UID     string `json:"uid" validate:"required"`
	Content string `json:"content" validate:"required,lte=500"` // 貼文限制 500 字內
	PostID  string `json:"post_id" validate:"required"`
}

// NewComment 發表評論
func (l *NewCommentLogic) NewComment(in *tweeting.CommentPostReq) (*tweeting.CommentPostResp, error) {
	// 驗證資料
	if err := l.svcCtx.Validate.ValidateAll(&newCommentReq{
		UID:     in.GetUid(),
		Content: in.GetContent(),
		PostID:  in.GetPostId(),
	}); err != nil {
		// 錯誤代碼 05-011-00
		return nil, ers.InvalidFormat(err.Error())
	}

	// 檢查是否有這個文章
	_, err := l.svcCtx.PostModel.FindOne(l.ctx, in.GetPostId())
	if err != nil {
		if errors.Is(model.ErrNotFound, err) {
			// 錯誤代碼 05-031-00
			return nil, ers.ResourceNotFound("failed to find post: ", in.GetPostId())
		}
		// 錯誤代碼 05-021-10
		e := domain.CommentErrorL(
			domain.CommentFoundErrorCode,
			logx.WithContext(l.ctx),
			[]logx.LogField{
				{Key: "req", Value: in},
				{Key: "func", Value: "PostModel.FindOne"},
				{Key: "err", Value: err},
			},
			"failed to find post:", in.GetPostId()).Wrap(err)

		return nil, e
	}

	data := &model.Comment{
		PostID:       in.GetPostId(),
		UID:          in.GetUid(),
		Content:      in.GetContent(),
		LikeCount:    0,
		DisLikeCount: 0,
	}
	err = l.svcCtx.CommentModel.Insert(l.ctx, data)
	if err != nil {
		// 錯誤代碼 05-021-11
		e := domain.CommentErrorL(
			domain.CommentInsertErrorCode,
			logx.WithContext(l.ctx),
			[]logx.LogField{
				{Key: "req", Value: in},
				{Key: "func", Value: "CommentModel.Insert"},
				{Key: "err", Value: err},
			},
			"failed to insert comment:", in.GetPostId()).Wrap(err)

		return nil, e
	}

	return &tweeting.CommentPostResp{
		CommentId: data.ID.Hex(),
	}, nil
}