Add LiveQuery

src/LiveQuery/ParseWebSocketServer.js

@@ -0,0 +1,44 @@
+import PLog from './PLog';
+
+let typeMap = new Map([['disconnect', 'close']]);
+
+export class ParseWebSocketServer {
+  server: Object;
+
+  constructor(server: any, onConnect: Function, websocketTimeout: number = 10 * 1000) {
+    let WebSocketServer = require('ws').Server;
+    let wss = new WebSocketServer({ server: server });
+    wss.on('listening', () => {
+      PLog.log('Parse LiveQuery Server starts running');
+    });
+    wss.on('connection', (ws) => {
+      onConnect(new ParseWebSocket(ws));
+      // Send ping to client periodically
+      let pingIntervalId = setInterval(() => {
+        if (ws.readyState == ws.OPEN) {
+          ws.ping();
+        } else {
+          clearInterval(pingIntervalId);
+        }
+      }, websocketTimeout);
+    });
+    this.server = wss;
+  }
+}
+
+export class ParseWebSocket {
+  ws: any;
+
+  constructor(ws: any) {
+    this.ws = ws;
+  }
+
+  on(type: string, callback): void {
+    let wsType = typeMap.has(type) ? typeMap.get(type) : type;
+    this.ws.on(wsType, callback);
+  }
+
+  send(message: any, channel: string): void {
+    this.ws.send(message);
+  }
+}