139 lines
3.5 KiB
JavaScript
139 lines
3.5 KiB
JavaScript
const express = require('express');
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const path = require('path');
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const cookieParser = require('cookie-parser');
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const logger = require('morgan');
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const http = require("http");
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const { Server } = require("socket.io");
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const createClient = require('redis').createClient;
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const client = createClient(
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{
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socket: {
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// host: 'simple_map_redis',
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host: 'localhost',
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}
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}
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);
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client.on('error', err => console.log('Redis Client Error', err));
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client.connect();
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const indexRouter = require('./routes/index');
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const app = express();
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app.use(logger('dev'));
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app.use(express.json());
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app.use(express.urlencoded({ extended: false }));
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app.use(cookieParser());
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app.use(express.static(path.join(__dirname, 'public')));
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app.use('/', indexRouter);
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let users = [];
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const server = http.createServer(app);
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const io = new Server(server);
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io.on('connection', (socket) => {
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const randomColor = "#" + ((1 << 24) * Math.random() | 0).toString(16).padStart(6, "0");
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users.push({"color": randomColor, "id": socket.id});
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io.to(socket.id).emit('color', {"color": randomColor, "id": socket.id});
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io.emit('users', users);
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client.lRange('draw', -500, -1).then((res) => {
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let lines = [];
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res.forEach((line) => {
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lines.push(JSON.parse(line));
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});
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io.to(socket.id).emit('history', lines);
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});
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socket.on('disconnect', () => {
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users = users.filter(user => user.id !== socket.id);
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io.emit('users', users);
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});
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socket.on('new_color', msg => {
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const user = msg.user;
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users.find(u => u.id === user).color = msg.color;
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io.emit('users', users);
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});
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socket.on('new_marker', msg => {
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const user = msg.user;
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const color = users.find(u => u.id === user).color;
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console.log(msg.coords);
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io.emit('new_marker', {"marker": msg.marker, "color": color, "coords": msg.coords});
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});
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socket.on('draw', async (msg) => {
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const user = msg.user;
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const color = users.find(u => u.id === user).color;
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await client.rPush('draw', JSON.stringify({"line": msg.line, "color": color}));
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await client.lTrim('draw', -500, -1);
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await client.expire('draw', 600);
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socket.broadcast.emit('draw', {"line": msg.line, "color": color});
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});
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});
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function normalizePort(val) {
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var port = parseInt(val, 10);
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if (isNaN(port)) {
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// named pipe
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return val;
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}
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if (port >= 0) {
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// port number
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return port;
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}
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return false;
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}
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var port = normalizePort(process.env.PORT || '3232');
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app.set('port', port);
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server.listen(port);
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server.on('error', onError);
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server.on('listening', onListening);
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function onError(error) {
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if (error.syscall !== 'listen') {
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throw error;
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}
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var bind = typeof port === 'string'
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? 'Pipe ' + port
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: 'Port ' + port;
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// handle specific listen errors with friendly messages
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switch (error.code) {
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case 'EACCES':
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console.error(bind + ' requires elevated privileges');
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process.exit(1);
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break;
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case 'EADDRINUSE':
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console.error(bind + ' is already in use');
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process.exit(1);
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break;
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default:
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throw error;
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}
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}
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function onListening() {
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var addr = server.address();
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var bind = typeof addr === 'string'
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? 'pipe ' + addr
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: 'port ' + addr.port;
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console.log('Listening on ' + bind);
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} |