Receivers: Added connect/disconenct notifications to player window

receivers/common/web/ConnectionMonitor.ts

@@ -0,0 +1,52 @@
+import { Opcode } from 'common/Packets';
+
+const connectionPingTimeout = 2500;
+const connections = [];
+const heartbeatRetries = {};
+let uiUpdateCallbacks = {
+    onConnect: null,
+    onDisconnect: null,
+}
+
+export function setUiUpdateCallbacks(callbacks: any) {
+    uiUpdateCallbacks = callbacks;
+}
+
+// Window might be re-created while devices are still connected
+window.targetAPI.onPing((_event, value: any) => {
+    if (value) {
+        heartbeatRetries[value.id] = 0;
+
+        if (!connections.includes(value.id)) {
+            connections.push(value.id);
+            uiUpdateCallbacks.onConnect(connections, value.id);
+        }
+    }
+});
+window.targetAPI.onConnect((_event, value: any) => {
+    connections.push(value.id);
+    uiUpdateCallbacks.onConnect(connections, value);
+});
+window.targetAPI.onDisconnect((_event, value: any) => {
+    console.log(`Device disconnected: ${JSON.stringify(value)}`);
+    const index = connections.indexOf(value.id);
+    if (index != -1) {
+        connections.splice(index, 1);
+        uiUpdateCallbacks.onDisconnect(connections, value.id);
+    }
+});
+
+setInterval(() => {
+    if (connections.length > 0) {
+        window.targetAPI.sendSessionMessage(Opcode.Ping, null);
+
+        for (const session of connections) {
+            if (heartbeatRetries[session] > 3) {
+                console.warn(`Could not ping device with connection id ${session}. Disconnecting...`);
+                window.targetAPI.disconnectDevice(session);
+            }
+
+            heartbeatRetries[session] = heartbeatRetries[session] === undefined ? 1 : heartbeatRetries[session] + 1;
+        }
+    }
+}, connectionPingTimeout);