Обновлен фронтенд

src/main/java/ru/serega6531/packmate/controller/WebSocketHandler.java

@@ -0,0 +1,30 @@
+package ru.serega6531.packmate.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.CloseStatus;
+import org.springframework.web.socket.WebSocketSession;
+import org.springframework.web.socket.handler.TextWebSocketHandler;
+import ru.serega6531.packmate.service.SubscriptionService;
+
+@SuppressWarnings("NullableProblems")
+@Component
+public class WebSocketHandler extends TextWebSocketHandler {
+
+    private final SubscriptionService subscriptionService;
+
+    @Autowired
+    public WebSocketHandler(SubscriptionService subscriptionService) {
+        this.subscriptionService = subscriptionService;
+    }
+
+    @Override
+    public void afterConnectionEstablished(WebSocketSession session) {
+        subscriptionService.addSubscriber(session);
+    }
+
+    @Override
+    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) {
+        subscriptionService.removeSubscriber(session);
+    }
+}