Merge pull request #13 from SlimusMinus/add_likes

added likes on post

src/main/java/com/krylov/refound/dto/PostResponse.java

@@ -23,4 +23,5 @@ public class PostResponse {
   private List<String> images;
   private boolean isFavorite;
   private Long userId;
+  private Long likeCount;
 }

src/main/java/com/krylov/refound/repository/FavoriteRepository.java

@@ -10,9 +10,7 @@ import org.springframework.data.jpa.repository.Query;
 public interface FavoriteRepository extends JpaRepository<Favorite, Long> {
 
   boolean existsByUserAndPost(User user, Post post);
-
   List<Favorite> findByUser(User user);
-
   void deleteByUserAndPost(User user, Post post);
 
   @Query("""
@@ -21,4 +19,13 @@ public interface FavoriteRepository extends JpaRepository<Favorite, Long> {
         AND f.post.id IN :postIds
   """)
   List<Long> findFavoritePostIds(Long userId, List<Long> postIds);
+
+  // ADD THIS METHOD:
+  @Query("""
+      SELECT f.post.id, COUNT(f.id) 
+      FROM Favorite f 
+      WHERE f.post.id IN :postIds 
+      GROUP BY f.post.id
+  """)
+  List<Object[]> countLikesByPostIds(List<Long> postIds);
 }

src/main/java/com/krylov/refound/service/PostService.java

@@ -4,11 +4,13 @@ import com.krylov.refound.dto.PostRequest;
 import com.krylov.refound.dto.PostResponse;
 import com.krylov.refound.entity.Image;
 import com.krylov.refound.entity.Post;
+import com.krylov.refound.entity.User;
 import com.krylov.refound.enums.ErrorCode;
 import com.krylov.refound.enums.PostCategory;
 import com.krylov.refound.enums.PostStatus;
 import com.krylov.refound.exception.ApiException;
 import com.krylov.refound.mapper.PostMapper;
+import com.krylov.refound.repository.FavoriteRepository;
 import com.krylov.refound.repository.ImageRepository;
 import com.krylov.refound.repository.PostRepository;
 import java.io.IOException;
@@ -16,8 +18,12 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.time.LocalDateTime;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.UUID;
+import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.cache.annotation.CacheEvict;
@@ -36,6 +42,7 @@ public class PostService {
   private final ImageRepository imageRepository;
   private final NominatimService nominatimService;
   private final UserService userService;
+  private final FavoriteRepository favoriteRepository;
 
   public PostRequest create(PostRequest request, MultipartFile image) {
 
@@ -66,17 +73,76 @@ public class PostService {
   }
 
   public List<PostResponse> getFeed() {
-      return repository.findAll().stream()
+    List<Post> posts = repository.findAll();
+
+    // Get all post IDs
+    List<Long> postIds = posts.stream()
+        .map(Post::getId)
+        .toList();
+
+    // Count likes for each post
+    Map<Long, Long> likeCounts = favoriteRepository.countLikesByPostIds(postIds).stream()
+        .collect(Collectors.toMap(
+            row -> (Long) row[0],  // post ID
+            row -> (Long) row[1]   // like count
+        ));
+
+    // Get current user's favorites if authenticated
+    Set<Long> userFavoriteIds = new HashSet<>();
+    try {
+      User currentUser = userService.getCurrentUser();
+      userFavoriteIds = new HashSet<>(
+          favoriteRepository.findFavoritePostIds(currentUser.getId(), postIds)
+      );
+    } catch (Exception e) {
+      // User not authenticated - that's OK
+    }
+
+    // Set like counts and favorite status
+    final Set<Long> finalUserFavoriteIds = userFavoriteIds;
+    return posts.stream()
         .map(post -> {
           PostResponse response = mapper.toResponse(post);
-            log.info("Post {}: images = {}, phone = {}", post.getId(), response.getImages()); // ← сюда
+          response.setLikeCount(likeCounts.getOrDefault(post.getId(), 0L));
+          response.setFavorite(finalUserFavoriteIds.contains(post.getId()));
           return response;
-          }).toList();
+        })
+        .toList();
 
   }
 
   public List <PostResponse> getById(Long id) {
-    return repository.findByUserId(id).stream().map(mapper::toResponse).toList();
+    List<Post> posts = repository.findByUserId(id);
+
+    List<Long> postIds = posts.stream()
+        .map(Post::getId)
+        .toList();
+
+    Map<Long, Long> likeCounts = favoriteRepository.countLikesByPostIds(postIds).stream()
+        .collect(Collectors.toMap(
+            row -> (Long) row[0],
+            row -> (Long) row[1]
+        ));
+
+    Set<Long> userFavoriteIds = new HashSet<>();
+    try {
+      User currentUser = userService.getCurrentUser();
+      userFavoriteIds = new HashSet<>(
+          favoriteRepository.findFavoritePostIds(currentUser.getId(), postIds)
+      );
+    } catch (Exception e) {
+      // User not authenticated
+    }
+
+    final Set<Long> finalUserFavoriteIds = userFavoriteIds;
+    return posts.stream()
+        .map(post -> {
+          PostResponse response = mapper.toResponse(post);
+          response.setLikeCount(likeCounts.getOrDefault(post.getId(), 0L));
+          response.setFavorite(finalUserFavoriteIds.contains(post.getId()));
+          return response;
+        })
+        .toList();
   }
 
   public PostResponse update(Long id, PostRequest request, MultipartFile image) {