first commit

2026-09-11 01:41:52 +08:00
commit 9f22e6ccae
263 changed files with 28935 additions and 0 deletions
@@ -0,0 +1,125 @@
+package service
+
+import (
+	"context"
+
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/global"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/dto"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/mysqldao"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/mysqlmodel"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/redisdao"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/errcode"
+)
+
+// LikeService 点赞业务服务。
+type LikeService struct {
+	likeDao   *mysqldao.LikeDao
+	outfitDao *mysqldao.OutfitDao
+}
+
+// NewLikeService 创建点赞服务。
+func NewLikeService() *LikeService {
+	return &LikeService{
+		likeDao:   mysqldao.NewLikeDao(),
+		outfitDao: mysqldao.NewOutfitDao(),
+	}
+}
+
+// LikeCreate 点赞或取消点赞社区穿搭。
+func (s *LikeService) LikeCreate(ctx context.Context, userID int64, request *dto.LikeCreateRequest) (*dto.LikeResponse, *errcode.Error) {
+	ctx, span := global.Tracer.Start(ctx, "svc.LikeLikeCreate")
+	defer span.End()
+
+	outfit, cerr := s.getPublicOutfit(ctx, userID, request.TargetUUID)
+	if cerr != nil {
+		return nil, cerr
+	}
+	targetID := outfit.ID
+
+	existing, err := s.likeDao.LikeGetByTargetAndUser(ctx, LikeTypeOutfit, targetID, userID)
+	notExist := false
+	if err != nil {
+		if isNotFound(err) {
+			notExist = true
+		} else {
+			return nil, errcode.DatabaseError
+		}
+	}
+
+	switch request.Action {
+	case ActionDo: // 点赞
+		if cerr := s.likeDao.LikeUpsertOn(ctx, &mysqlmodel.Like{
+			LikeType: LikeTypeOutfit,
+			TargetID: targetID,
+			UserID:   userID,
+			Status:   InteractStatusOn,
+		}); cerr != nil {
+			return nil, errcode.LikeFailed
+		}
+		_ = redisdao.LikeAdd(ctx, LikeTypeOutfit, targetID, userID)
+
+		// 仅在「从取消/无记录变为点赞」时发通知，避免并发/重复点赞重复通知。
+		wasLiked := !notExist && existing.Status == InteractStatusOn
+		if !wasLiked && outfit.UserID != userID {
+			sendNotification(ctx, outfit.UserID, userID, NotificationTypeLike, "收到新的点赞", "你的穿搭「"+outfit.OutfitName+"」收到了一个赞")
+		}
+
+	case ActionCancel: // 取消点赞
+		if !notExist && existing.Status == InteractStatusOn {
+			if uerr := s.likeDao.LikeUpdateStatus(ctx, existing.ID, InteractStatusOff); uerr != nil {
+				return nil, errcode.LikeFailed
+			}
+			_ = redisdao.LikeRemove(ctx, LikeTypeOutfit, targetID, userID)
+		}
+	}
+
+	return &dto.LikeResponse{}, nil
+}
+
+// GetByTargetID 查询穿搭点赞状态与点赞数（Redis 优先）。
+func (s *LikeService) GetByTargetID(ctx context.Context, userID int64, request *dto.LikeGetByTargetIDRequest) (*dto.LikeGetByTargetIDResponse, *errcode.Error) {
+	ctx, span := global.Tracer.Start(ctx, "svc.LikeGetByTargetID")
+	defer span.End()
+
+	outfit, cerr := s.getPublicOutfit(ctx, userID, request.TargetUUID)
+	if cerr != nil {
+		return nil, cerr
+	}
+	targetID := outfit.ID
+
+	// 是否已点赞：Redis 优先，回落 MySQL。
+	isLiked, err := redisdao.LikeIsMember(ctx, LikeTypeOutfit, targetID, userID)
+	if err != nil {
+		if rec, derr := s.likeDao.LikeGetByTargetAndUser(ctx, LikeTypeOutfit, targetID, userID); derr == nil {
+			isLiked = rec.Status == InteractStatusOn
+		}
+	}
+
+	// 点赞总数：Redis 优先，回落 MySQL。
+	count, err := redisdao.LikeCount(ctx, LikeTypeOutfit, targetID)
+	if err != nil || count == 0 {
+		if dbCnt, derr := s.likeDao.LikeCountByTarget(ctx, LikeTypeOutfit, targetID); derr == nil {
+			count = dbCnt
+		}
+	}
+
+	return &dto.LikeGetByTargetIDResponse{
+		UserIsLiked: isLiked,
+		LikeCount:   count,
+	}, nil
+}
+
+// getPublicOutfit 按 UUID 查询社区穿搭（须存在），非本人仅可操作公开可见的穿搭。
+func (s *LikeService) getPublicOutfit(ctx context.Context, userID int64, outfitUUID string) (*mysqlmodel.Outfit, *errcode.Error) {
+	outfit, err := s.outfitDao.OutfitGetByUUID(ctx, outfitUUID)
+	if err != nil {
+		if isNotFound(err) {
+			return nil, errcode.TargetNotFound
+		}
+		return nil, errcode.DatabaseError
+	}
+	if outfit.UserID != userID && !isOutfitPublicVisible(outfit) {
+		return nil, errcode.OutfitNoPermission
+	}
+	return outfit, nil
+}