feat(be) : WebSocket 컨트롤러 추가

Author: beekeeper24

src/main/kotlin/com/back/koreaTravelGuide/domain/userChat/chatmessage/controller/ChatMessageSocketController.kt

@@ -0,0 +1,27 @@
+package com.back.koreaTravelGuide.domain.userChat.chatmessage.controller
+
+import com.back.koreaTravelGuide.common.ApiResponse
+import com.back.koreaTravelGuide.domain.userChat.chatmessage.service.ChatMessageService
+import org.springframework.messaging.handler.annotation.DestinationVariable
+import org.springframework.messaging.handler.annotation.MessageMapping
+import org.springframework.messaging.handler.annotation.Payload
+import org.springframework.messaging.simp.SimpMessagingTemplate
+import org.springframework.stereotype.Controller
+
+@Controller
+class ChatMessageSocketController(
+    private val chatMessageService: ChatMessageService,
+    private val messagingTemplate: SimpMessagingTemplate,
+) {
+    @MessageMapping("/userchat/{roomId}/messages")
+    fun handleMessage(
+        @DestinationVariable roomId: Long,
+        @Payload req: ChatMessageService.SendMessageReq,
+    ) {
+        val saved = chatMessageService.send(roomId, req)
+        messagingTemplate.convertAndSend(
+            "/topic/userchat/$roomId",
+            ApiResponse(msg = "메시지 전송", data = saved),
+        )
+    }
+}