extension.js

// The module 'vscode' contains the VS Code extensibility API
// Import the module and reference it with the alias vscode in your code below
const vscode = require('vscode');

const WebSocket = require('ws');

const wss = new WebSocket.Server({port: 8080});

const clients = new Set();

wss.on('connection', onSocketConnect);

function onSocketConnect(ws) {
	console.log('connected');
	clients.add(ws);
	ws.on('message', function(message) {
		console.log('from socket: ', JSON.parse(message));
	});
}



// This method is called when your extension is activated
// Your extension is activated the very first time the command is executed

/**
 * @param {vscode.ExtensionContext} context
 */
function activate(context) {

	// Use the console to output diagnostic information (console.log) and errors (console.error)
	// This line of code will only be executed once when your extension is activated
	console.log('Congratulations, your extension "remote" is now active!');

	// The command has been defined in the package.json file
	// Now provide the implementation of the command with  registerCommand
	// The commandId parameter must match the command field in package.json
	let playpause = vscode.commands.registerCommand('remote.playpause', function () {
		// The code you place here will be executed every time your command is executed
		console.log("Sending command...");
		for (let client of clients) {
			client.send(JSON.stringify({
				message: "playpause"
			}));
		}
		// Display a message box to the user
		vscode.window.showInformationMessage('Played/paused your video');
	});

	let rewind = vscode.commands.registerCommand('remote.rewind', function () {
		console.log("Sending rewind command...");
		for (let client of clients) {
			client.send(JSON.stringify({
				message: "rewind"
			}));
		}
		vscode.window.showInformationMessage('Rewind video 10 seconds');
	});

	let forward = vscode.commands.registerCommand('remote.forward', function () {
		console.log("Sending forward command...");
		for (let client of clients) {
			client.send(JSON.stringify({
				message: "forward"
			}));
		}
		vscode.window.showInformationMessage('Forward video 10 seconds');
	});

	let restart = vscode.commands.registerCommand('remote.restart', function () {
		console.log("Sending restart command...");
		for (let client of clients) {
			client.send(JSON.stringify({
				message: "restart"
			}));
		}
		vscode.window.showInformationMessage('Restarting video');
	});

	let next = vscode.commands.registerCommand('remote.next', function () {
		console.log("Sending next command...");
		for (let client of clients) {
			client.send(JSON.stringify({
				message: "next"
			}));
		}
		vscode.window.showInformationMessage('Loading next video');
	});

	context.subscriptions.push(playpause);
	context.subscriptions.push(rewind);
	context.subscriptions.push(forward);
	context.subscriptions.push(restart);
	context.subscriptions.push(next);
}

// This method is called when your extension is deactivated
function deactivate() {}

module.exports = {
	activate,
	deactivate
}