✨feature: Add isLike and itemLikeCount on Items Detail API

backend/streetdrop-api/src/test/java/unit/apis/item/controller/ItemControllerTest.java

@@ -425,6 +425,7 @@ void findNearItemsTestSuccess1() throws Exception {
                                         new MusicResponseDto("title", "artist", "/albumImage.jpg", List.of("genre")),
                                         "사용자 코멘트",
                                         LocalDateTime.of(2023, 5, 26, 12, 0),
+                                        false,
                                         1
                                 )
                         )
@@ -466,6 +467,7 @@ void findNearItemsTestSuccess2() throws Exception {
                                         new MusicResponseDto("title", "artist", "/albumImage.jpg", List.of("genre")),
                                         "사용자 코멘트",
                                         LocalDateTime.of(2023, 5, 26, 12, 0),
+                                        false,
                                         1
                                 )
                         )

backend/streetdrop-core/src/main/java/com/depromeet/domains/item/dto/response/ItemsResponseDto.java

@@ -34,6 +34,9 @@ public record ItemDetailDto(
                 )
                 LocalDateTime createdAt,
 
+                @Schema(description = "아이템 좋아요 여부", example = "true")
+                boolean isLiked,
+
                 @Schema(description = "아이템 좋아요 개수", example = "100")
                 int itemLikeCount
         ) {
@@ -45,6 +48,7 @@ public ItemDetailDto(Item item) {
                                 new MusicResponseDto(item),
                                 item.getContent(),
                                 item.getCreatedAt(),
+                                item.isLiked(item.getUser()),
                                 item.getItemLikeCount()
                         );
                 }

backend/streetdrop-core/src/main/java/com/depromeet/domains/item/entity/Item.java

@@ -61,4 +61,9 @@ public void setItemLocation(ItemLocation itemLocation) {
 	public int getItemLikeCount() {
 		return likes != null ? likes.size() : 0;
 	}
+
+	public boolean isLiked(User user) {
+		return likes != null && likes.stream().anyMatch(like -> like.isLiked(user));
+	}
+
 }

backend/streetdrop-core/src/main/java/com/depromeet/domains/item/entity/ItemLike.java

@@ -30,4 +30,9 @@ public ItemLike(Item item, User user) {
 		this.item = item;
 		this.user = user;
 	}
+
+	public boolean isLiked(User user) {
+		return user.equals(user);
+	}
+
 }