feat(content): 列表卡片与后台返回收藏点赞评论数

fruitshorts-module-interaction/src/main/java/com/fruitshorts/interaction/service/CommentService.java

@@ -3,6 +3,7 @@
 package com.fruitshorts.interaction.service;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
@@ -32,10 +33,12 @@ import org.springframework.util.StringUtils;
 
 import java.time.LocalDateTime;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 
 /**
@@ -48,6 +51,9 @@ import java.util.Set;
 @RequiredArgsConstructor
 public class CommentService {
 
+    private static final String DRAMA_ID_COLUMN = "drama_id";
+    private static final String COMMENT_COUNT_COLUMN = "comment_count";
+
     public static final String STATUS_PENDING = "pending";
     public static final String STATUS_PUBLISHED = "published";
     public static final String STATUS_REJECTED = "rejected";
@@ -185,6 +191,46 @@ public class CommentService {
         return count == null ? 0L : count;
     }
 
+    /**
+     * 批量统计多部剧的未删除评论数，按 drama_id 分组，避免逐剧查询。
+     */
+    public Map<Long, Long> countByDramas(Collection<Long> dramaIds) {
+        if (dramaIds == null || dramaIds.isEmpty()) {
+            return Map.of();
+        }
+        List<Long> ids = dramaIds.stream().filter(Objects::nonNull).distinct().toList();
+        if (ids.isEmpty()) {
+            return Map.of();
+        }
+        QueryWrapper<ContentComment> wrapper = Wrappers.query();
+        wrapper.select(DRAMA_ID_COLUMN, "COUNT(*) AS " + COMMENT_COUNT_COLUMN)
+                .in(DRAMA_ID_COLUMN, ids)
+                .eq("deleted", 0)
+                .ne("status", STATUS_DELETED)
+                .groupBy(DRAMA_ID_COLUMN);
+        List<Map<String, Object>> rows = commentMapper.selectMaps(wrapper);
+        if (rows == null || rows.isEmpty()) {
+            return Map.of();
+        }
+        Map<Long, Long> counts = new HashMap<>();
+        for (Map<String, Object> row : rows) {
+            Long dramaId = asLong(row.get(DRAMA_ID_COLUMN));
+            if (dramaId != null) {
+                counts.put(dramaId, asLong(row.get(COMMENT_COUNT_COLUMN), 0L));
+            }
+        }
+        return counts;
+    }
+
+    private Long asLong(Object value) {
+        return value instanceof Number number ? number.longValue() : null;
+    }
+
+    private long asLong(Object value, long defaultValue) {
+        Long number = asLong(value);
+        return number == null ? defaultValue : number;
+    }
+
     // ---------------- 后台 ----------------
 
     public PageResult<CommentRespVO> adminPage(CommentQueryReqVO req) {