feat: TalkRoom Comment 등록 API 구현 (#24)

src/main/java/com/jisungin/api/comment/CommentController.java

@@ -0,0 +1,31 @@
+package com.jisungin.api.comment;
+
+import com.jisungin.api.ApiResponse;
+import com.jisungin.api.comment.request.CommentCreateRequest;
+import com.jisungin.api.oauth.Auth;
+import com.jisungin.api.oauth.AuthContext;
+import com.jisungin.application.comment.CommentService;
+import com.jisungin.application.comment.response.CommentResponse;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RequiredArgsConstructor
+@RequestMapping("/v1")
+@RestController
+public class CommentController {
+
+    private final CommentService commentService;
+
+    @PostMapping("/talk-rooms/{talkRoomId}/comments")
+    public ApiResponse<CommentResponse> writeComment(@PathVariable Long talkRoomId,
+                                                     @Valid @RequestBody CommentCreateRequest request,
+                                                     @Auth AuthContext authContext) {
+        return ApiResponse.ok(commentService.writeComment(request.toService(), talkRoomId, authContext.getUserId()));
+    }
+
+}

src/main/java/com/jisungin/api/comment/request/CommentCreateRequest.java

@@ -0,0 +1,27 @@
+package com.jisungin.api.comment.request;
+
+import com.jisungin.application.comment.request.CommentCreateServiceRequest;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class CommentCreateRequest {
+
+    @NotBlank(message = "내용은 필수 입니다.")
+    private String content;
+
+    @Builder
+    private CommentCreateRequest(String content) {
+        this.content = content;
+    }
+
+    public CommentCreateServiceRequest toService() {
+        return CommentCreateServiceRequest.builder()
+                .content(content)
+                .build();
+    }
+
+}

src/main/java/com/jisungin/application/comment/CommentService.java

@@ -0,0 +1,38 @@
+package com.jisungin.application.comment;
+
+import com.jisungin.application.comment.request.CommentCreateServiceRequest;
+import com.jisungin.application.comment.response.CommentResponse;
+import com.jisungin.domain.comment.Comment;
+import com.jisungin.domain.comment.repository.CommentRepository;
+import com.jisungin.domain.talkroom.TalkRoom;
+import com.jisungin.domain.talkroom.repository.TalkRoomRepository;
+import com.jisungin.domain.user.User;
+import com.jisungin.domain.user.repository.UserRepository;
+import com.jisungin.exception.BusinessException;
+import com.jisungin.exception.ErrorCode;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@RequiredArgsConstructor
+@Service
+public class CommentService {
+
+    private final CommentRepository commentRepository;
+    private final TalkRoomRepository talkRoomRepository;
+    private final UserRepository userRepository;
+
+    public CommentResponse writeComment(CommentCreateServiceRequest request, Long talkRoomId, Long userId) {
+        User user = userRepository.findById(userId)
+                .orElseThrow(() -> new BusinessException(ErrorCode.USER_NOT_FOUND));
+
+        TalkRoom talkRoom = talkRoomRepository.findById(talkRoomId)
+                .orElseThrow(() -> new BusinessException(ErrorCode.TALK_ROOM_NOT_FOUND));
+
+        Comment comment = Comment.create(request, user, talkRoom);
+
+        commentRepository.save(comment);
+
+        return CommentResponse.of(comment.getContent(), user.getName());
+    }
+
+}

src/main/java/com/jisungin/application/comment/request/CommentCreateServiceRequest.java

@@ -0,0 +1,18 @@
+package com.jisungin.application.comment.request;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class CommentCreateServiceRequest {
+
+    private String content;
+
+    @Builder
+    private CommentCreateServiceRequest(String content) {
+        this.content = content;
+    }
+
+}

src/main/java/com/jisungin/application/comment/response/CommentResponse.java

@@ -0,0 +1,28 @@
+package com.jisungin.application.comment.response;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class CommentResponse {
+
+    private String content;
+
+    private String userName;
+
+    @Builder
+    private CommentResponse(String content, String userName) {
+        this.content = content;
+        this.userName = userName;
+    }
+
+    public static CommentResponse of(String content, String name) {
+        return CommentResponse.builder()
+                .content(content)
+                .userName(name)
+                .build();
+    }
+
+}

src/main/java/com/jisungin/domain/comment/Comment.java

@@ -1,5 +1,6 @@
 package com.jisungin.domain.comment;
 
+import com.jisungin.application.comment.request.CommentCreateServiceRequest;
 import com.jisungin.domain.BaseEntity;
 import com.jisungin.domain.talkroom.TalkRoom;
 import com.jisungin.domain.user.User;
@@ -38,4 +39,12 @@ private Comment(User user, TalkRoom talkRoom, String content) {
         this.content = content;
     }
 
+    public static Comment create(CommentCreateServiceRequest request, User user, TalkRoom talkRoom) {
+        return Comment.builder()
+                .content(request.getContent())
+                .user(user)
+                .talkRoom(talkRoom)
+                .build();
+    }
+
 }

src/main/java/com/jisungin/domain/comment/repository/CommentRepository.java

@@ -0,0 +1,10 @@
+package com.jisungin.domain.comment.repository;
+
+import com.jisungin.domain.comment.Comment;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface CommentRepository extends JpaRepository<Comment, Long> {
+
+}