pong timeouts

web/console/conn.js

 	constructor(id) {
 		this.id = id;
 		this.conn = null;
+		this.pongTimeout = null;
+		this.pongTime = 7500;
 		this.q = [];
 
 		this.onstatechange = () => {}
 
 		this.createConn();
 
-		setInterval(() => this.send({ type: "ping" }), 30000);
+		setInterval(() => this.send({ type: "ping" }), this.pongTime);
+		this.gotPong();
 	}
 
 	createConn() {
 				break;
 
 			case "pong":
+				this.gotPong();
 				break;
 
 			default:
 		}
 	}
 
+	gotPong() {
+		this.ready = true;
+		this.onstatechange("Ready");
+		if (this.pongTimeout)
+			clearTimeout(this.pongTimeout);
+
+		this.pongTimeout = setTimeout(() => {
+			this.ready = false;
+			this.onstatechange("Pong timeout");
+		}, this.pongTime / 2);
+	}
+
 	runJavascript(js) {
 		this.send({ type: "run-js", js });
 	}