Add chat controller

chat-service/src/main/java/com/relay/chatservice/chat/ChatController.java

@@ -0,0 +1,47 @@
+package com.relay.chatservice.chat;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+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;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+import java.util.List;
+
+@Controller
+@RequiredArgsConstructor
+public class ChatController {
+    private final ChatMessageService chatMessageService;
+    private final SimpMessagingTemplate messagingTemplate;
+
+    @MessageMapping("/chat")
+    public void processMessage(
+            @Payload ChatMessage chatMessage
+    ) {
+        ChatMessage savedMsg = chatMessageService.save(chatMessage);
+        // john/queue/message
+
+        messagingTemplate.convertAndSendToUser(
+                chatMessage.getRecipientId(),
+                "/queue/messages",
+                ChatNotification.builder()
+                        .id(savedMsg.getId())
+                        .senderId(savedMsg.getSenderId())
+                        .recipientId(savedMsg.getRecipientId())
+                        .content(savedMsg.getContent())
+                        .build()
+
+        );
+    }
+
+    @GetMapping("/messages/{senderId}/{recipientId}")
+    public ResponseEntity<List<ChatMessage>> findChatMessages(
+            @PathVariable("senderId") String senderId,
+            @PathVariable("recipientId") String recipientId
+    ) {
+        return ResponseEntity.ok(chatMessageService.findChatMessages(senderId, recipientId));
+    }
+}

chat-service/src/main/java/com/relay/chatservice/chat/ChatNotification.java

@@ -0,0 +1,17 @@
+package com.relay.chatservice.chat;
+
+import lombok.*;
+import org.springframework.data.mongodb.core.mapping.Document;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+@Document
+public class ChatNotification {
+    private String id;
+    private String senderId;
+    private String recipientId;
+    private String content;
+}