Merge pull request #36 from GDSC-DGU/feat/35

[feat] 채팅 목록 조회 API

src/main/java/org/harang/server/controller/ChatController.java

@@ -0,0 +1,24 @@
+package org.harang.server.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.harang.server.annotation.MemberId;
+import org.harang.server.dto.common.ApiResponse;
+import org.harang.server.service.PostService;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/v1/chats")
+@RequiredArgsConstructor
+public class ChatController {
+    // 엔드포인트 고려하여 새로운 컨트롤러 생성
+
+    private final PostService postService;
+
+    @GetMapping
+    public ApiResponse<?> getChattings(@MemberId Long memberId) {
+        // 사용자가 참여한 채팅방 목록을 조회
+        return ApiResponse.success(postService.getChattings(memberId));
+    }
+}

src/main/java/org/harang/server/dto/type/ErrorMessage.java

@@ -50,6 +50,7 @@ public enum ErrorMessage {
     ONLY_SPROUT_CAN_CREATE_MATCH("50005", HttpStatus.INTERNAL_SERVER_ERROR, "새싹인 유저만 매칭을 생성할 수 있습니다."),
     ONLY_WATERING_CAN_HELP_SPROUT("50006", HttpStatus.INTERNAL_SERVER_ERROR, "물뿌리개인 유저만 새싹을 도와줄 수 있습니다."),
     CHAT_ALREADY_STARTED("50007", HttpStatus.INTERNAL_SERVER_ERROR, "이미 채팅을 시작한 게시글입니다."),
+    INVALID_MEMBER_TYPE("50008", HttpStatus.INTERNAL_SERVER_ERROR, "유효하지 않은 사용자 타입입니다."),
     ;
 
     private String code;

src/main/java/org/harang/server/repository/PostRepository.java

@@ -13,4 +13,6 @@ default Post findByIdOrThrow(Long id) {
     }
 
     List<Post> findByTitleIsContaining(String title);
+
+    List<Post> findAllByMemberId(Long memberId);
 }

src/main/java/org/harang/server/repository/WaitingRepository.java

@@ -9,4 +9,6 @@
 @Repository
 public interface WaitingRepository extends JpaRepository<Waiting, Long> {
     List<Waiting> findAllByPostId(Long postId);
+
+    List<Waiting> findAllByMemberId(Long memberId);
 }

src/main/java/org/harang/server/service/PostService.java

@@ -5,8 +5,11 @@
 import lombok.RequiredArgsConstructor;
 import org.harang.server.domain.*;
 import org.harang.server.domain.enums.Status;
+import org.harang.server.domain.enums.Type;
 import org.harang.server.dto.request.PostRequest;
 import org.harang.server.dto.response.PostResponse;
+import org.harang.server.dto.type.ErrorMessage;
+import org.harang.server.exception.CustomException;
 import org.harang.server.repository.*;
 import org.hibernate.event.spi.PostDeleteEventListener;
 import org.springframework.stereotype.Service;
@@ -26,6 +29,7 @@ public class PostService {
     private final CategoryRepository categoryRepository;
     private final LocationRepository locationRepository;
     private final PostCategoryRepository postCategoryRepository;
+    private final WaitingRepository waitingRepository;
 
     @Transactional
     public Post createPost(Long memberId, PostRequest request) {
@@ -111,4 +115,26 @@ public List<PostResponse> getRecommendedPosts() {
                 .map(p -> PostResponse.of(p))
                 .toList();
     }
+
+    public List<PostResponse> getChattings(Long memberId) {
+        // 사용자가 물뿌리개인 경우 - 매칭 대기 리스트의 게시글 조회
+        // 사용자가 새싹인 경우 - 자신이 작성한 게시글 조회
+
+        Member member = memberRepository.findByIdOrThrow(memberId);
+        Type type = member.getType();
+        List<Post> posts;
+
+        if (type.equals(Type.SPROUT)) {
+            // 자신이 작성한 게시글 조회
+            posts = postRepository.findAllByMemberId(memberId);
+        } else if ((type.equals(Type.WATERING))) {
+            // 자신이 매칭 대기 중인 게시글 조회
+            List<Waiting> myWaitings = waitingRepository.findAllByMemberId(memberId);
+            posts = myWaitings.stream().map(w -> w.getPost()).toList();
+        } else {
+            throw new CustomException(ErrorMessage.INVALID_MEMBER_TYPE);
+        }
+
+        return posts.stream().map(p -> PostResponse.of(p)).toList();
+    }
 }