Client: parse JSON server messages

public_html/js/client.js

@@ -33,6 +33,7 @@ function onClose(evt) {
 
 function onMessage(evt) {
 	console.log('Received: "' + evt.data + '".');
+	parseMessage(evt.data);
 }
 
 function onError(evt) {
@@ -54,6 +55,34 @@ function sendInit() {
 	websocket.send(initJson);
 }
 
+// Message parsing
+function parseMessage(msgString) {
+	try {
+		let msg = JSON.parse(msgString);
+
+		switch (msg.type) {
+			// Response to 'init' command
+			case 'init':
+				// TODO
+				console.log('Got init response: ', msg);
+				break;
+
+			// Incoming chat message
+			case 'message':
+				// TODO
+				console.log('Got message event: from "' + msg.from + '", text "' + msg.text + '"');
+				break;
+
+			// TODO Topic change, user join/leave, error, ...
+
+			default:
+				console.error('Unknown message type: "' + msg.type + '"');
+		}
+	}
+	catch (e) {
+		console.error('Error parsing message JSON: ' + e.message);
+	}
+}
 
 // Run script after page is loaded
 $(function() {