feat: 相关业务的调用

backend/internal/video/video_repo.go

@@ -77,3 +77,21 @@ func (vr *VideoRepository) UpdatePopularity(ctx context.Context, id uint, change
 	}
 	return nil
 }
+
+func (vr *VideoRepository) ChangeLikesCount(ctx context.Context, id uint, change int64) error {
+	if err := vr.db.WithContext(ctx).Model(&Video{}).
+		Where("id = ?", id).
+		UpdateColumn("likes_count", gorm.Expr("GREATEST(likes_count + ?, 0)", change)).Error; err != nil {
+		return err
+	}
+	return nil
+}
+
+func (vr *VideoRepository) ChangePopularity(ctx context.Context, id uint, change int64) error {
+	if err := vr.db.WithContext(ctx).Model(&Video{}).
+		Where("id = ?", id).
+		UpdateColumn("popularity", gorm.Expr("GREATEST(popularity + ?, 0)", change)).Error; err != nil {
+		return err
+	}
+	return nil
+}

backend/internal/video/video_service.go

@@ -9,17 +9,19 @@ import (
 	"strings"
 	"time"
 
+	"feedsystem_video_go/internal/middleware/rabbitmq"
 	rediscache "feedsystem_video_go/internal/middleware/redis"
 )
 
 type VideoService struct {
-	repo     *VideoRepository
+	repo         *VideoRepository
-	cache    *rediscache.Client
+	cache        *rediscache.Client
-	cacheTTL time.Duration
+	cacheTTL     time.Duration
+	popularityMQ *rabbitmq.PopularityMQ
 }
 
-func NewVideoService(repo *VideoRepository, cache *rediscache.Client) *VideoService {
+func NewVideoService(repo *VideoRepository, cache *rediscache.Client, popularityMQ *rabbitmq.PopularityMQ) *VideoService {
-	return &VideoService{repo: repo, cache: cache, cacheTTL: 5 * time.Minute}
+	return &VideoService{repo: repo, cache: cache, cacheTTL: 5 * time.Minute, popularityMQ: popularityMQ}
 }
 
 func (vs *VideoService) Publish(ctx context.Context, video *Video) error {
@@ -173,6 +175,12 @@ func (vs *VideoService) UpdatePopularity(ctx context.Context, id uint, change in
 		return err
 	}
 
+	if vs.popularityMQ != nil {
+		if err := vs.popularityMQ.Update(ctx, id, change); err == nil {
+			return nil
+		}
+	}
+
 	if vs.cache != nil {
 		// 1) 详情缓存：直接失效（最简单靠谱）
 		_ = vs.cache.Del(context.Background(), fmt.Sprintf("video:detail:id=%d", id))