Fix/chatting api hotfix

src/main/java/com/assu/server/domain/chat/converter/ChatConverter.java

@@ -1,6 +1,7 @@
 package com.assu.server.domain.chat.converter;
 
 import com.assu.server.domain.admin.entity.Admin;
+import com.assu.server.domain.chat.entity.enums.MessageType;
 import com.assu.server.domain.member.entity.Member;
 import com.assu.server.domain.chat.dto.ChatMessageDTO;
 import com.assu.server.domain.chat.dto.ChatRequestDTO;
@@ -69,6 +70,18 @@ public static Message toMessageEntity(ChatRequestDTO.ChatMessageRequestDTO reque
                 .receiver(receiver)
                 .message(request.getMessage())
                 .unreadCount(request.getUnreadCountForSender())
+                .type(MessageType.TEXT)
+                .build();
+    }
+
+    public static Message toGuideMessageEntity(ChatRequestDTO.ChatMessageRequestDTO request, ChattingRoom room, Member sender, Member receiver) {
+        return Message.builder()
+                .chattingRoom(room)
+                .sender(sender)
+                .receiver(receiver)
+                .message(request.getMessage())
+                .unreadCount(0)
+                .type(MessageType.GUIDE)
                 .build();
     }
 

src/main/java/com/assu/server/domain/chat/dto/ChatRequestDTO.java

@@ -1,6 +1,9 @@
 package com.assu.server.domain.chat.dto;
 
+import com.assu.server.domain.chat.entity.enums.MessageType;
+import lombok.AllArgsConstructor;
 import lombok.Getter;
+import lombok.NoArgsConstructor;
 import lombok.Setter;
 
 public class ChatRequestDTO {
@@ -12,6 +15,8 @@ public static class CreateChatRoomRequestDTO {
 
     @Getter
     @Setter
+    @AllArgsConstructor
+    @NoArgsConstructor
     public static class ChatMessageRequestDTO {
         private Long roomId;
         private Long senderId;

src/main/java/com/assu/server/domain/chat/entity/enums/MessageType.java

@@ -1,5 +1,5 @@
 package com.assu.server.domain.chat.entity.enums;
 
 public enum MessageType {
-	TEXT, PROPOSAL, SYSTEM
+	TEXT, PROPOSAL, SYSTEM, GUIDE
 }

src/main/java/com/assu/server/domain/chat/service/ChatService.java

@@ -12,4 +12,5 @@ public interface ChatService {
     ChatResponseDTO.ReadMessageResponseDTO readMessage(Long roomId, Long memberId);
     ChatResponseDTO.ChatHistoryResponseDTO readHistory(Long roomId, Long memberId);
     ChatResponseDTO.LeaveChattingRoomResponseDTO leaveChattingRoom(Long roomId, Long memberId);
+    ChatResponseDTO.SendMessageResponseDTO sendGuideMessage(ChatRequestDTO.ChatMessageRequestDTO request);
 }

src/main/java/com/assu/server/domain/chat/service/ChatServiceImpl.java

@@ -9,7 +9,6 @@
 import com.assu.server.domain.chat.dto.ChatRoomListResultDTO;
 import com.assu.server.domain.chat.entity.ChattingRoom;
 import com.assu.server.domain.chat.entity.Message;
-import com.assu.server.domain.chat.repository.BlockRepository;
 import com.assu.server.domain.chat.repository.ChatRepository;
 import com.assu.server.domain.chat.repository.MessageRepository;
 import com.assu.server.domain.member.entity.Member;
@@ -24,6 +23,7 @@
 import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.messaging.simp.SimpMessagingTemplate;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
@@ -39,7 +39,7 @@ public class ChatServiceImpl implements ChatService {
     private final AdminRepository adminRepository;
     private final MessageRepository messageRepository;
     private final StoreRepository storeRepository;
-    private final BlockRepository blockRepository;
+    private final SimpMessagingTemplate simpMessagingTemplate;
 
 
     @Override
@@ -109,6 +109,27 @@ public ChatResponseDTO.SendMessageResponseDTO handleMessage(ChatRequestDTO.ChatM
         return ChatConverter.toSendMessageDTO(saved);
     }
 
+
+    @Override
+    @Transactional
+    public ChatResponseDTO.SendMessageResponseDTO sendGuideMessage(ChatRequestDTO.ChatMessageRequestDTO request) {
+        // 유효성 검사
+        ChattingRoom room = chatRepository.findById(request.getRoomId())
+                .orElseThrow(() -> new DatabaseException(ErrorStatus.NO_SUCH_ROOM));
+        Member sender = memberRepository.findById(request.getSenderId())
+                .orElseThrow(() -> new DatabaseException(ErrorStatus.NO_SUCH_MEMBER));
+        Member receiver = memberRepository.findById(request.getReceiverId())
+                .orElseThrow(() -> new DatabaseException(ErrorStatus.NO_SUCH_MEMBER));
+
+        Message message = ChatConverter.toGuideMessageEntity(request, room, sender, receiver);
+        Message saved = messageRepository.saveAndFlush(message);
+
+        ChatResponseDTO.SendMessageResponseDTO responseDTO = ChatConverter.toSendMessageDTO(saved);
+        simpMessagingTemplate.convertAndSend("/sub/chat/" + request.getRoomId(), responseDTO);
+
+        return responseDTO;
+    }
+
     @Transactional
     @Override
     public ChatResponseDTO.ReadMessageResponseDTO readMessage(Long roomId, Long memberId) {

src/main/java/com/assu/server/domain/partnership/service/PartnershipServiceImpl.java

@@ -4,7 +4,10 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
-
+import com.assu.server.domain.chat.dto.ChatRequestDTO;
+import com.assu.server.domain.chat.entity.ChattingRoom;
+import com.assu.server.domain.chat.repository.ChatRepository;
+import com.assu.server.domain.chat.service.ChatService;
 import org.springframework.stereotype.Service;
 
 import com.assu.server.domain.member.entity.Member;
@@ -54,6 +57,8 @@ public class PartnershipServiceImpl implements PartnershipService {
 	private final StudentRepository studentRepository;
     private final PaperContentRepository contentRepository;
     private final NotificationCommandService notificationService;
+    private final ChatService chatService;
+    private final ChatRepository chatRepository;
 
 
     @Override
@@ -403,6 +408,20 @@ public PartnershipResponseDTO.CreateDraftResponseDTO createDraftPartnership(Part
 
         notificationService.sendPartnerProposal(partner.getId(), draftPaper.getId(), admin.getName());
 
+        ChattingRoom chattingRoom = chatRepository.findChattingRoomByAdminIdAndPartnerId(admin.getId(), partner.getId());
+
+        String guideMessage = admin.getName() + "님이 제휴 제안서 초안을 전송했어요! 확인 후 제휴 제안서를 작성해 주세요";
+        ChatRequestDTO.ChatMessageRequestDTO guideMessageRequest = new ChatRequestDTO.ChatMessageRequestDTO(
+                chattingRoom.getId(),
+                admin.getId(),
+                partner.getId(),
+                guideMessage,
+                0
+        );
+
+        // 5. 완성된 DTO를 사용해서 안내 메시지를 전송합니다.
+        chatService.sendGuideMessage(guideMessageRequest);
+
         return PartnershipConverter.toCreateDraftResponseDTO(draftPaper);
     }