feat:添加按照点赞数的feed流

internal/feed/entity.go

@@ -27,3 +27,14 @@ type ListLatestResponse struct {
 	NextTime  int64           `json:"next_time"`
 	HasMore   bool            `json:"has_more"`
 }
+
+type ListLikesCountRequest struct {
+	Limit      int   `json:"limit"`
+	LikesCount int64 `json:"likes_count"`
+}
+
+type ListLikesCountResponse struct {
+	VideoList            []FeedVideoItem `json:"video_list"`
+	NextLikesCountBefore int64           `json:"next_likes_count_before"`
+	HasMore              bool            `json:"has_more"`
+}

internal/feed/handler.go

@@ -34,3 +34,20 @@ func (f *FeedHandler) ListLatest(c *gin.Context) {
 	}
 	c.JSON(200, feedItems)
 }
+
+func (f *FeedHandler) ListLikesCount(c *gin.Context) {
+	var req ListLikesCountRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(400, gin.H{"error": err.Error()})
+		return
+	}
+	if req.Limit <= 0 || req.Limit > 50 {
+		req.Limit = 10
+	}
+	feedItems, err := f.service.ListLikesCount(c.Request.Context(), req.Limit, req.LikesCount)
+	if err != nil {
+		c.JSON(500, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(200, feedItems)
+}

internal/feed/repo.go

@@ -28,3 +28,16 @@ func (repo *FeedRepository) ListLatest(ctx context.Context, limit int, latestBef
 	}
 	return videos, nil
 }
+
+func (repo *FeedRepository) ListLikesCount(ctx context.Context, limit int, likesCountBefore int64) ([]video.Video, error) {
+	var videos []video.Video
+	query := repo.db.WithContext(ctx).Model(&video.Video{}).
+		Order("like_count DESC")
+	if likesCountBefore > 0 {
+		query = query.Where("like_count < ?", likesCountBefore)
+	}
+	if err := query.Limit(limit).Find(&videos).Error; err != nil {
+		return nil, err
+	}
+	return videos, nil
+}

internal/feed/service.go

@@ -52,3 +52,35 @@ func (f *FeedService) ListLatest(ctx context.Context, limit int, latestBefore ti
 	}
 	return resp, nil
 }
+
+func (f *FeedService) ListLikesCount(ctx context.Context, limit int, likesCountBefore int64) (ListLikesCountResponse, error) {
+	videos, err := f.repo.ListLikesCount(ctx, limit, likesCountBefore)
+	if err != nil {
+		return ListLikesCountResponse{}, err
+	}
+	var nextLikesCountBefore int64
+	if len(videos) > 0 {
+		nextLikesCountBefore = videos[len(videos)-1].LikesCount
+	} else {
+		nextLikesCountBefore = 0
+	}
+	hasMore := len(videos) == limit
+	feedVideos := make([]FeedVideoItem, 0, len(videos))
+	for _, video := range videos {
+		feedVideos = append(feedVideos, FeedVideoItem{
+			ID:          video.ID,
+			Author:      FeedAuthor{ID: video.AuthorID, Username: video.Username},
+			Title:       video.Title,
+			Description: video.Description,
+			PlayURL:     video.PlayURL,
+			CoverURL:    video.CoverURL,
+			LikesCount:  video.LikesCount,
+		})
+	}
+	resp := ListLikesCountResponse{
+		VideoList:            feedVideos,
+		NextLikesCountBefore: nextLikesCountBefore,
+		HasMore:              hasMore,
+	}
+	return resp, nil
+}

internal/http/router.go

@@ -67,6 +67,7 @@ func SetRouter(db *gorm.DB) *gin.Engine {
 	feedGroup := r.Group("/feed")
 	{
 		feedGroup.POST("/listLatest", feedHandler.ListLatest)
+		feedGroup.POST("/listLikesCount", feedHandler.ListLikesCount)
 	}
 	return r
 }

test/feed.json

@@ -2,7 +2,7 @@
   "info": {
     "name": "FeedSystem Feed API",
     "_postman_id": "4c2fd555-b880-4b14-8023-55a944936352",
-    "description": "Feed endpoints without embedded scripts.",
+    "description": "Feed endpoints.\n\nPagination:\n- /feed/listLatest: copy response.next_time into feedLatestTime\n- /feed/listLikesCount: copy response.next_likes_count_before into feedLikesCountBefore",
     "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json"
   },
   "item": [
@@ -21,11 +21,28 @@
           "path": ["feed", "listLatest"]
         }
       }
+    },
+    {
+      "name": "List Feed By Likes Count",
+      "request": {
+        "method": "POST",
+        "header": [{ "key": "Content-Type", "value": "application/json" }],
+        "body": {
+          "mode": "raw",
+          "raw": "{\n  \"limit\": {{feedLimit}},\n  \"likes_count\": {{feedLikesCountBefore}}\n}"
+        },
+        "url": {
+          "raw": "{{host}}/feed/listLikesCount",
+          "host": ["{{host}}"],
+          "path": ["feed", "listLikesCount"]
+        }
+      }
     }
   ],
   "variable": [
     { "key": "host", "value": "http://localhost:8080" },
     { "key": "feedLimit", "value": "10" },
-    { "key": "feedLatestTime", "value": "0" }
+    { "key": "feedLatestTime", "value": "0" },
+    { "key": "feedLikesCountBefore", "value": "0" }
   ]
 }