Feature/55 post chat room

src/main/java/com/sptp/backend/chat_room/repository/ChatRoom.java

@@ -15,6 +15,9 @@
 @NoArgsConstructor
 @AllArgsConstructor
 @Builder
+@Table(uniqueConstraints = {@UniqueConstraint(
+        name = "CHAT_ROOM_UNIQUE",
+        columnNames = {"artist_id", "member_id", "art_work_id"})})
 public class ChatRoom extends BaseEntity {
 
     @Id
@@ -27,8 +30,8 @@ public class ChatRoom extends BaseEntity {
     private Member artist;
 
     @ManyToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "collector_id")
-    private Member collector;
+    @JoinColumn(name = "member_id")
+    private Member member;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "art_work_id")

src/main/java/com/sptp/backend/chat_room/repository/ChatRoomRepository.java

@@ -2,5 +2,8 @@
 
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.Optional;
+
 public interface ChatRoomRepository extends JpaRepository<ChatRoom, Long> {
+    Optional<ChatRoom> findByMemberIdAndArtistIdAndArtWorkId(Long artistId, Long MemberId, Long artWorkId);
 }

src/main/java/com/sptp/backend/chat_room/service/ChatRoomService.java

@@ -0,0 +1,68 @@
+package com.sptp.backend.chat_room.service;
+
+import com.sptp.backend.art_work.repository.ArtWorkRepository;
+import com.sptp.backend.chat_room.repository.ChatRoom;
+import com.sptp.backend.chat_room.repository.ChatRoomRepository;
+import com.sptp.backend.chat_room.web.dto.ChatRoomDetailResponse;
+import com.sptp.backend.common.exception.CustomException;
+import com.sptp.backend.common.exception.ErrorCode;
+import com.sptp.backend.member.repository.MemberRepository;
+import com.sptp.backend.message.repository.Message;
+import com.sptp.backend.message.repository.MessageRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class ChatRoomService {
+
+    private final ChatRoomRepository chatRoomRepository;
+    private final MemberRepository memberRepository;
+    private final ArtWorkRepository artWorkRepository;
+    private final MessageRepository messageRepository;
+
+    public long createChatRoom(Long loginMemberId, Long artistId, Long artWorkId) {
+
+        Optional<ChatRoom> chatRoomOptional =
+                chatRoomRepository.findByMemberIdAndArtistIdAndArtWorkId(loginMemberId, artistId, artWorkId);
+
+        // 기존 채팅방이 존재하는 경우 해당 id 반환
+        if (chatRoomOptional.isPresent()) {
+            return chatRoomOptional.get().getId();
+        }
+
+        ChatRoom chatRoom = ChatRoom.builder()
+                .member(memberRepository.findById(loginMemberId)
+                        .orElseThrow(() -> new CustomException(ErrorCode.NOT_FOUND_MEMBER)))
+                .artist(memberRepository.findById(artistId)
+                        .orElseThrow(() -> new CustomException(ErrorCode.NOT_FOUND_ARTIST)))
+                .artWork(artWorkRepository.findById(artWorkId)
+                        .orElseThrow(() -> new CustomException(ErrorCode.NOT_FOUND_ARTWORK)))
+                .build();
+
+        return chatRoomRepository.save(chatRoom).getId();
+    }
+
+    public ChatRoomDetailResponse getChatRoomDetail(Long chatRoomId) {
+
+        ChatRoom chatRoom = chatRoomRepository.findById(chatRoomId)
+                .orElseThrow(() -> new CustomException(ErrorCode.NOT_FOUND_CHAT_ROOM));
+        List<Message> messages = messageRepository.findAllByChatRoomOrderByIdAsc(chatRoom);
+
+        return ChatRoomDetailResponse.builder()
+                .chatRoomId(chatRoomId)
+                .artist(ChatRoomDetailResponse.MemberDto.from(chatRoom.getArtist()))
+                .member(ChatRoomDetailResponse.MemberDto.from(chatRoom.getMember()))
+                .messages(messages.stream()
+                        .map(ChatRoomDetailResponse.MessageDto::from)
+                        .collect(Collectors.toList()))
+                .build();
+    }
+
+}

src/main/java/com/sptp/backend/chat_room/web/ChatRoomController.java

@@ -0,0 +1,39 @@
+package com.sptp.backend.chat_room.web;
+
+import com.sptp.backend.chat_room.service.ChatRoomService;
+import com.sptp.backend.chat_room.web.dto.ChatRoomCreateRequest;
+import com.sptp.backend.chat_room.web.dto.ChatRoomDetailResponse;
+import com.sptp.backend.jwt.service.dto.CustomUserDetails;
+import lombok.RequiredArgsConstructor;
+import org.apache.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/chat-rooms")
+public class ChatRoomController {
+
+    private final ChatRoomService chatRoomService;
+
+    @PostMapping
+    public ResponseEntity<Void> createChatRoom(@Valid @RequestBody ChatRoomCreateRequest chatRoomCreateRequest,
+                                            @AuthenticationPrincipal CustomUserDetails userDetails) {
+
+        long chatRoomId = chatRoomService.createChatRoom(userDetails.getMember().getId(),
+                chatRoomCreateRequest.getArtistId(), chatRoomCreateRequest.getArtWorkId());
+
+        return ResponseEntity.status(HttpStatus.MOVED_PERMANENTLY)
+                .header(HttpHeaders.LOCATION, "/chat-rooms/" + chatRoomId).build();
+    }
+
+    @GetMapping("/{chatRoomId}")
+    public ResponseEntity<ChatRoomDetailResponse> getChatRoomDetail(@PathVariable Long chatRoomId) {
+
+        return ResponseEntity.ok(chatRoomService.getChatRoomDetail(chatRoomId));
+    }
+}

src/main/java/com/sptp/backend/chat_room/web/dto/ChatRoomCreateRequest.java

@@ -0,0 +1,21 @@
+package com.sptp.backend.chat_room.web.dto;
+
+import com.sptp.backend.art_work.repository.ArtWork;
+import com.sptp.backend.member.repository.Member;
+import lombok.*;
+
+import javax.validation.constraints.NotNull;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class ChatRoomCreateRequest {
+
+    @NotNull(message = "작가 고유 번호는 필수입니다.")
+    private Long artistId;
+
+    @NotNull(message = "작품 고유 번호는 필수입니다.")
+    private Long artWorkId;
+}

src/main/java/com/sptp/backend/chat_room/web/dto/ChatRoomDetailResponse.java

@@ -0,0 +1,52 @@
+package com.sptp.backend.chat_room.web.dto;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import com.sptp.backend.member.repository.Member;
+import com.sptp.backend.message.repository.Message;
+import lombok.*;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+@Data
+@Builder
+public class ChatRoomDetailResponse {
+
+    private Long chatRoomId;
+    private MemberDto artist;
+    private MemberDto member;
+    private List<MessageDto> messages;
+
+    @Data
+    @Builder
+    public static class MemberDto {
+        private Long id;
+        private String name;
+//        private String responseTime; 추후 구현 예정
+
+        public static MemberDto from(Member member) {
+            return MemberDto.builder()
+                    .id(member.getId())
+                    .name(member.getNickname())
+                    .build();
+        }
+    }
+
+    @Data
+    @Builder
+    public static class MessageDto {
+        private Long senderId;
+        private String message;
+
+        @JsonFormat(pattern = "yyyy-MM-dd-HH-mm-ss")
+        private LocalDateTime sendTime;
+
+        public static MessageDto from(Message message) {
+            return MessageDto.builder()
+                    .senderId(message.getSender().getId())
+                    .message(message.getMessage())
+                    .sendTime(message.getCreatedDate())
+                    .build();
+        }
+    }
+}

src/main/java/com/sptp/backend/message/repository/MessageRepository.java

@@ -1,6 +1,13 @@
 package com.sptp.backend.message.repository;
 
+import com.sptp.backend.chat_room.repository.ChatRoom;
+import org.springframework.data.jpa.repository.EntityGraph;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
+
 public interface MessageRepository extends JpaRepository<Message, Long> {
+
+    @EntityGraph(attributePaths = {"sender"})
+    List<Message> findAllByChatRoomOrderByIdAsc(ChatRoom chatRom);
 }