新增猜你喜欢

community-8073/src/main/java/com/ivmiku/tutorial/controller/PostController.java

@@ -321,6 +321,24 @@ public class PostController {
 
         return Result.ok(drafts);
     }
+    /**
+     * 猜你喜欢
+     */
+    @GetMapping("/guessYouLike")
+    @Operation(summary = "猜你喜欢")
+    public Result guessYouLike(@RequestParam("latitude") Double latitude,
+                               @RequestParam("longitude") Double longitude) {
+
+        String userId = StpUtil.getLoginIdAsString();
+        String key = "search_history:" + userId;
+        // 获取用户的搜索历史关键词
+        List<String> searchHistory = redisTemplate.opsForList().range(key, 0, -1);
+
+        // 获取猜你喜欢的帖子列表
+        List<Post> recommendedPosts = postService.getRecommendedPosts(latitude, longitude, searchHistory);
+
+        return Result.ok(recommendedPosts);
+    }
 
 
 }

community-8073/src/main/java/com/ivmiku/tutorial/entity/Post.java

@@ -44,4 +44,6 @@ public class Post implements Serializable {
     private Date updatedAt;
 
     private static final long serialVersionUID = 1L;
+
+
 }

community-8073/src/main/java/com/ivmiku/tutorial/mapper/LikeMapper.java

@@ -21,6 +21,9 @@ public interface LikeMapper extends BaseMapper<Likee> {
     @Select("SELECT SUM(like_count) FROM comments WHERE user_openid = #{userOpenid}")
     Long getCommentLikeCount(@Param("userOpenid") String userOpenid);
 
+    // 查询帖子被点赞的总数
+    Long getLikeCountByPostId(@Param("postId") Long postId);
+
 }
 
 

community-8073/src/main/java/com/ivmiku/tutorial/mapper/PostMapper.java

@@ -23,6 +23,12 @@ public interface PostMapper extends BaseMapper<Post> {
     List<Post> searchPosts(String keyword);
 
     List<Post> getTopFavoritedPosts(int limit);
+
+    List<Post> getPostsBasedOnHistoryAndHotness(Long userId, List<String> searchHistory);
+
+
+    @Select("SELECT * FROM post WHERE ST_Distance_Sphere(point(location_lng, location_lat), point(#{longitude}, #{latitude})) < 50000") // 50km 范围
+    List<Post> getPostsNearby(Double latitude, Double longitude);
 }
 
 

community-8073/src/main/java/com/ivmiku/tutorial/service/InteractionService.java

@@ -31,4 +31,6 @@ public interface InteractionService {
     void unfavoriteOfficialTutorial(String userOpenid, Long tutorialId);
 
     IPage<Tutorials> getFavoriteOfficialTutorials(String userOpenid, int pageNum, int pageSize);
+    // 新增方法：根据帖子 ID 获取点赞总数
+    Long getLikeCountByPostId(Long postId);
 }

community-8073/src/main/java/com/ivmiku/tutorial/service/PostService.java

@@ -31,4 +31,8 @@ public interface PostService extends IService<Post> {
     List<Post> getTopFavoritedPosts(int limit);
 
     List<Post> getDraftsByUserId(String userId);
+
+    List<Post> getRecommendedPosts(Double latitude, Double longitude, List<String> searchHistory);
+
+
 }

community-8073/src/main/java/com/ivmiku/tutorial/service/impl/InteractionServiceImpl.java

@@ -251,4 +251,10 @@ public class InteractionServiceImpl implements InteractionService {
     }
 
 
+    @Override
+    public Long getLikeCountByPostId(Long postId) {
+        log.info("Fetching like count for post {}", postId);
+        return likeMapper.getLikeCountByPostId(postId);
+    }
+
 }

community-8073/src/main/java/com/ivmiku/tutorial/service/impl/PostServiceImpl.java

@@ -5,17 +5,24 @@ import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.ivmiku.tutorial.entity.BrowingHistory;
 import com.ivmiku.tutorial.entity.Post;
+import com.ivmiku.tutorial.mapper.CommentMapper;
+import com.ivmiku.tutorial.mapper.FavoriteMapper;
+import com.ivmiku.tutorial.mapper.LikeMapper;
 import com.ivmiku.tutorial.mapper.PostMapper;
 import com.ivmiku.tutorial.service.BrowingHistoryService;
+import com.ivmiku.tutorial.service.InteractionService;
 import com.ivmiku.tutorial.service.PostService;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
 import java.sql.Timestamp;
 import java.util.Date;
+import java.util.HashMap;
 import java.util.List;
+import java.util.stream.Collectors;
 
 @Service
 public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements PostService {
@@ -25,6 +32,10 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements Po
     @Autowired
     private PostMapper postMapper;
 
+    @Lazy
+    @Autowired
+    private InteractionService interactionService;
+
     @Autowired
     private BrowingHistoryService browingHistoryService;
 
@@ -197,5 +208,36 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements Po
     }
 
 
+    @Override
+    public List<Post> getRecommendedPosts(Double latitude, Double longitude, List<String> searchHistory) {
+        // 1. 根据用户当前位置计算距离（例如使用 Haversine 公式）
+        List<Post> nearbyPosts = postMapper.getPostsNearby(latitude, longitude);
+
+        // 2. 根据帖子热度排序
+        List<Post> sortedPosts = sortPostsByHeat(nearbyPosts);
+
+        // 3. 根据用户的搜索历史关键词筛选相关帖子
+        List<Post> matchingPosts = sortedPosts.stream()
+                .filter(post -> searchHistory.stream().anyMatch(keyword ->
+                        post.getTitle().contains(keyword) || post.getContent().contains(keyword)))
+                .collect(Collectors.toList());
+
+        return matchingPosts;
+    }
+
+    public List<Post> sortPostsByHeat(List<Post> posts) {
+        // 根据帖子热度进行排序
+        return posts.stream()
+                .sorted((post1, post2) -> {
+                    int post1Heat = calculatePostHeat(post1);
+                    int post2Heat = calculatePostHeat(post2);
+                    return Integer.compare(post2Heat, post1Heat); // 降序排列
+                })
+                .collect(Collectors.toList());
+    }
+    public int calculatePostHeat(Post post) {
+        Long postId = post.getPostId();
+        return interactionService.getLikeCountByPostId(postId).intValue();
+    }
 
 }

community-8073/src/main/resources/mapper/LikeMapper.xml

@@ -17,4 +17,8 @@
         id,user_openid,post_id,tutorialId,
         comment_id,is_deleted
     </sql>
+    <select id="getLikeCountByPostId" resultType="java.lang.Long">
+        SELECT COUNT(*) FROM likee
+        WHERE post_id = #{postId} AND is_deleted = 0
+    </select>
 </mapper>

community-8073/src/main/resources/mapper/PostMapper.xml

@@ -108,5 +108,11 @@
         ORDER BY COUNT(f.id) DESC
             LIMIT #{limit}
     </select>
+    <select id="getPostsBasedOnHistoryAndHotness" resultType="com.ivmiku.tutorial.entity.Post">
+        SELECT *
+        FROM post
+        WHERE content LIKE CONCAT('%', #{searchHistory}, '%')
+        ORDER BY hotness DESC
+    </select>
 
 </mapper>