fix: fixed bugs for runtime application

src/main/java/xin/merlin/myplayerbackend/utils/websocket/command/CommandDispatcher.java

@@ -15,6 +15,7 @@ public class CommandDispatcher {
     private final Typing typingCommand;
     private final Heartbeat heartbeatCommand;
     private final SystemNotify systemNotifyCommand;
+    private final PersonalNotify personalNotifyCommand;
 
     public void dispatch(JSONObject msg) throws IOException {
         String cmd = msg.getString("cmd");
@@ -25,6 +26,7 @@ public class CommandDispatcher {
             case "TYPING"      -> typingCommand.handle(msg);
             case "HEARTBEAT"   -> heartbeatCommand.handle(msg);
             case "SYSTEM_NOTIFY" -> systemNotifyCommand.handle(msg);
+            case "PERSONAL_NOTIFY" -> personalNotifyCommand.handle(msg);
 
             default -> {
                 System.err.println("Unknown command: " + cmd);

src/main/java/xin/merlin/myplayerbackend/utils/websocket/command/impl/Message.java

@@ -16,6 +16,9 @@ public class Message implements BaseCommandHandler {
 
     @Override
     public void handle(JSONObject msg) throws IOException {
+/*
+TODO: 这里需要处理如果目标用户不在线，如何去完成消息的存储
+ */
         String to = msg.getString("to");
         sessionManager.sendToUser(Integer.valueOf(to), msg.toJSONString());
     }

src/main/java/xin/merlin/myplayerbackend/utils/websocket/command/impl/PersonalNotify.java

@@ -0,0 +1,22 @@
+package xin.merlin.myplayerbackend.utils.websocket.command.impl;
+
+import com.alibaba.fastjson2.JSONObject;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import xin.merlin.myplayerbackend.utils.websocket.WebSocketSessionManager;
+import xin.merlin.myplayerbackend.utils.websocket.command.BaseCommandHandler;
+
+import java.io.IOException;
+
+@Component
+@RequiredArgsConstructor
+public class PersonalNotify implements BaseCommandHandler {
+
+    private final WebSocketSessionManager sessionManager;
+
+    @Override
+    public void handle(JSONObject msg) throws IOException {
+        String to = msg.getString("to");
+        sessionManager.sendToUser(Integer.valueOf(to), msg.toJSONString());
+    }
+}