[#147] 채팅방 입장 시 상대방 존재 유무 판별

src/main/java/com/goorm/team9/icontact/domain/chat/dto/response/ChatMessageDto.java

@@ -21,6 +21,7 @@ public class ChatMessageDto {
     private Long senderId;
     private String senderNickname;
     private String content;
+    private String recipientNickname;
     private ChatMessageType type;
     private LocalDateTime timeStamp;
 

src/main/java/com/goorm/team9/icontact/domain/chat/service/ChatMessageService.java

@@ -63,11 +63,16 @@ public void sendMessage(ChatMessageDto chatMessageDto) {
             }
         }
 
+        String recipientNickname = chatMessageDto.getRecipientNickname();
+
+        boolean isRecipientInRoom = webSocketSessionService.isUserInRoom(chatRoom.getRoomId(), recipientNickname);
+
         ChatMessage chatMessage = ChatMessage.builder()
                 .chatRoom(chatRoom)
                 .sender(sender)
                 .content(chatMessageDto.getContent())
                 .type(chatMessageDto.getType())
+                .isRead(isRecipientInRoom)
                 .build();
         chatMessageRepository.save(chatMessage);
 

src/main/java/com/goorm/team9/icontact/domain/chat/service/WebSocketSessionService.java

@@ -66,6 +66,11 @@ public boolean isUserOnline(String nickname) {
                 .anyMatch(userMap -> userMap.containsKey(nickname));
     }
 
+    public boolean isUserInRoom(Long roomId, String nickname) {
+        return chatRoomSessions.getOrDefault(roomId, Map.of())
+                .containsKey(nickname);
+    }
+
     public void sendPrivateMessage(String nickname, String destination, Object payload) {
         chatRoomSessions.values().forEach(userMap -> {
             WebSocketSession session = userMap.get(nickname);