72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
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const port = 6789;
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const playersPerSession = 2;
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const child_process = require('child_process');
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const fs = require('fs');
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const path = require('path');
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if (!fs.existsSync('node_modules')) {
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console.log('Please run npm install.')
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process.exit(1);
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}
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const express = require('express');
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app = express();
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require('express-ws')(app);
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if (!fs.existsSync(path.join('..', 'html5'))) {
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console.log('Please compile for html5 before running the server.');
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process.exit(1);
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}
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app.use('/', express.static('../html5'));
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app.use((err, req, res, next) => {
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console.error(err.stack);
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});
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class Session {
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constructor() {
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this.clients = [];
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this.instance = child_process.fork('./kha.js');
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this.instance.on('message', (message) => {
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this.clients[message.id].send(Buffer.from(message.data));
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});
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}
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}
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let sessions = [];
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let pendingSession = new Session();
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app.ws('/', (socket, req) => {
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console.log('Client connected.');
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socket.session = pendingSession;
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socket.id = socket.session.clients.length;
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socket.session.clients.push(socket);
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socket.session.instance.send({message: 'connect', id: socket.id});
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socket.on('message', function (message) {
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socket.session.instance.send({message: 'message', data: message, id: socket.id});
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});
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socket.onclose = () => {
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console.log('Removing client ' + socket.id + '.');
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socket.session.instance.send({message: 'disconnect', id: socket.id});
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socket.session.clients.remove(socket);
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if (socket.session.clients.length === 0) {
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socket.session.instance.kill();
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sessions.remove(socket.session);
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}
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};
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if (pendingSession.clients.length === playersPerSession) {
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console.log('Starting session.');
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sessions.push(pendingSession);
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pendingSession = new Session();
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}
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});
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console.log('Starting server at ' + port + '.');
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app.listen(port);
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