feature: 실시간 채팅 기능 구현

src/main/java/com/HHive/hhive/domain/category/data/MajorCategory.java

@@ -11,7 +11,8 @@ public enum MajorCategory {
     DANCE("댄스/무용"),
     SOCIAL("사교/인맥"),
     MEDIA("사진/영상"),
-    PET("반려동물");
+    PET("반려동물"),
+    ETC("기타");
 
     private final String title;
 

src/main/java/com/HHive/hhive/domain/chatmessage/controller/ChatMessageController.java

@@ -1,21 +1,16 @@
 package com.HHive.hhive.domain.chatmessage.controller;
 
-import com.HHive.hhive.domain.chatmessage.dto.ChatMessageRequestDTO;
 import com.HHive.hhive.domain.chatmessage.dto.ChatMessageResponseDTO;
 import com.HHive.hhive.domain.chatmessage.service.ChatMessageService;
 import com.HHive.hhive.domain.user.UserDetailsImpl;
 import com.HHive.hhive.global.common.CommonResponse;
-import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
-import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 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;
 
@@ -26,18 +21,6 @@ public class ChatMessageController {
 
     private final ChatMessageService chatMessageService;
 
-    @PostMapping("/hives/{hiveId}")
-    public ResponseEntity<CommonResponse<Void>> sendChatMessage(
-            @PathVariable Long hiveId,
-            @RequestBody @Valid ChatMessageRequestDTO requestDTO,
-            @AuthenticationPrincipal UserDetailsImpl userDetails) {
-
-        chatMessageService.sendChatMessages(hiveId, requestDTO, userDetails.getUser());
-
-        return ResponseEntity.status(HttpStatus.CREATED).body(
-                CommonResponse.of("메시지 전송 성공", null));
-    }
-
     @GetMapping("/hives/{hiveId}")
     public ResponseEntity<CommonResponse<List<ChatMessageResponseDTO>>> getChatMessages(
             @PathVariable Long hiveId,

src/main/java/com/HHive/hhive/domain/chatmessage/controller/SocketController.java

@@ -0,0 +1,29 @@
+package com.HHive.hhive.domain.chatmessage.controller;
+
+import com.HHive.hhive.domain.chatmessage.dto.ChatMessageRequestDTO;
+import com.HHive.hhive.domain.chatmessage.dto.ChatMessageResponseDTO;
+import com.HHive.hhive.domain.chatmessage.entity.ChatMessage;
+import com.HHive.hhive.domain.chatmessage.service.ChatMessageService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.messaging.handler.annotation.MessageMapping;
+import org.springframework.messaging.simp.SimpMessageSendingOperations;
+import org.springframework.stereotype.Controller;
+
+@Controller
+@RequiredArgsConstructor
+public class SocketController {
+
+    private final SimpMessageSendingOperations sendingOperations;
+
+    private final ChatMessageService chatMessageService;
+
+    @MessageMapping("/chat")
+    public void socketHandler(ChatMessageRequestDTO requestDTO) {
+
+        ChatMessage chatMessage = chatMessageService.receiveAndSaveMessage(requestDTO);
+
+        sendingOperations.convertAndSend("/topic/chat/" + requestDTO.getHiveId(),
+                ChatMessageResponseDTO.from(chatMessage));
+    }
+
+}

src/main/java/com/HHive/hhive/domain/chatmessage/dto/ChatMessageRequestDTO.java

@@ -6,6 +6,10 @@
 @Getter
 public class ChatMessageRequestDTO {
 
+    private Long hiveId;
+
+    private String username;
+
     @Size(min = 1, max = 500)
     private String message;
 }

src/main/java/com/HHive/hhive/domain/chatmessage/dto/ChatMessageResponseDTO.java

@@ -1,7 +1,7 @@
 package com.HHive.hhive.domain.chatmessage.dto;
 
 import com.HHive.hhive.domain.chatmessage.entity.ChatMessage;
-import com.HHive.hhive.domain.user.entity.User;
+import com.fasterxml.jackson.annotation.JsonFormat;
 import java.time.LocalDateTime;
 import lombok.Builder;
 import lombok.Getter;
@@ -12,18 +12,16 @@ public class ChatMessageResponseDTO {
 
     private String message;
 
-    private Long senderId;
-
-    private String senderName;
+    private String username;
 
+    @JsonFormat(pattern = "MM월 dd일 / HH시 mm분")
     private LocalDateTime createdAt;
 
     public static ChatMessageResponseDTO from(ChatMessage chatMessage) {
 
         return ChatMessageResponseDTO.builder()
                 .message(chatMessage.getMessage())
-                .senderId(chatMessage.getSenderId())
-                .senderName(chatMessage.getSenderName())
+                .username(chatMessage.getSenderName())
                 .createdAt(chatMessage.getCreatedAt())
                 .build();
     }

src/main/java/com/HHive/hhive/domain/chatmessage/service/ChatMessageService.java

@@ -8,8 +8,10 @@
 import com.HHive.hhive.domain.hive.service.HiveService;
 import com.HHive.hhive.domain.relationship.hiveuser.validator.HiveUserValidator;
 import com.HHive.hhive.domain.user.entity.User;
+import com.HHive.hhive.domain.user.repository.UserRepository;
 import com.HHive.hhive.global.exception.chatmessage.NotFoundChatMessageException;
 import com.HHive.hhive.global.exception.chatmessage.NotSenderOfChatMessageException;
+import com.HHive.hhive.global.exception.user.NotFoundUserException;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -21,19 +23,24 @@ public class ChatMessageService {
 
     private final ChatMessageRepository chatMessageRepository;
 
+    private final UserRepository userRepository;
+
     private final HiveService hiveService;
 
     private final HiveUserValidator hiveUserValidator;
 
-    public void sendChatMessages(Long hiveId, ChatMessageRequestDTO requestDTO, User user) {
+    public ChatMessage receiveAndSaveMessage(ChatMessageRequestDTO requestDTO) {
 
-        Hive hive = hiveService.findHiveById(hiveId);
+        User user = userRepository.findByUsername(requestDTO.getUsername()).orElseThrow(
+                NotFoundUserException::new);
 
-        hiveUserValidator.validateHiveUser(hive, user);
+        Hive hive = hiveService.findHiveById(requestDTO.getHiveId());
 
-        ChatMessage chatMessage = makeChatMessage(hive, requestDTO.getMessage(), user);
+        ChatMessage chatMessage = makeChatMessage(hive, user, requestDTO.getMessage());
 
         chatMessageRepository.save(chatMessage);
+
+        return chatMessage;
     }
 
     public List<ChatMessageResponseDTO> getChatMessages(Long hiveId, User user) {
@@ -58,14 +65,14 @@ public void deleteChatMessage(Long chatMessageId, User user) {
         chatMessage.updateDeletedAt();
     }
 
-    public void validateLoginUserEqualsMessageSender(ChatMessage chatMessage, User user) {
+    private void validateLoginUserEqualsMessageSender(ChatMessage chatMessage, User user) {
 
-        if(!chatMessage.getSenderId().equals(user.getId())) {
+        if (!chatMessage.getSenderId().equals(user.getId())) {
             throw new NotSenderOfChatMessageException();
         }
     }
 
-    private ChatMessage makeChatMessage(Hive hive, String message, User sender) {
+    private ChatMessage makeChatMessage(Hive hive, User sender, String message) {
 
         return ChatMessage.builder()
                 .hive(hive)

src/main/java/com/HHive/hhive/global/config/WebSecurityConfig.java

@@ -78,6 +78,7 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
                         .permitAll() // resource 접근 허용 설정
                         .requestMatchers("/api/users/**").permitAll() // '/api/users/'로 시작하는 요청 모두 접근 허가
                         .requestMatchers("/api/notifications/**").permitAll()
+                        .requestMatchers("/ws/**").permitAll()
                         .anyRequest().authenticated() // 그 외 모든 요청 인증처리
         );
 

src/main/java/com/HHive/hhive/global/config/WebSocketConfig.java

@@ -0,0 +1,33 @@
+package com.HHive.hhive.global.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.messaging.simp.config.MessageBrokerRegistry;
+import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
+import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
+import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;
+
+@Configuration
+@EnableWebSocketMessageBroker
+public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
+
+    @Override
+    public void registerStompEndpoints(StompEndpointRegistry registry) {
+
+        //handshake를 위한 설정
+        registry.addEndpoint("/ws")
+                .setAllowedOriginPatterns("*")
+                //웹소켓 지원하지 않는 브라우저를 도움
+                .withSockJS();
+    }
+
+    @Override
+    public void configureMessageBroker(MessageBrokerRegistry registry) {
+
+        //SimpleBroker로 바로 이동할 경로설정. 스프링에서 제공하는 내장 브로커를 사용하겠다
+        registry.enableSimpleBroker("/topic", "/queue");
+
+        //SimpAnnotationMethod 로 가는 경로. 메시지 처리 후 SimpleBroker로 이동할
+        registry.setApplicationDestinationPrefixes("/pub");
+    }
+
+}