68 lines
1.9 KiB
TypeScript
68 lines
1.9 KiB
TypeScript
// source: https://github.com/idlewinn/collab-server/blob/master/src/index.ts
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import express from 'express';
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import http from 'http';
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import socketIO from 'socket.io';
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const app = express();
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const port = process.env.PORT || 8080;
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app.get('/', (req, res) => {
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res.send('Hi, collab!');
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});
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const server = http.createServer(app);
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server.listen(port, () => {
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console.log(`listening on port: ${port}`);
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});
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const io = socketIO(server, {
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handlePreflightRequest: function(req, res) {
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var headers = {
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'Access-Control-Allow-Headers': 'Content-Type, Authorization',
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'Access-Control-Allow-Origin': req.header ? req.header.origin : '*',
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'Access-Control-Allow-Credentials': true,
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};
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res.writeHead(200, headers);
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res.end();
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},
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});
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io.on('connection', socket => {
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console.log('connection established!');
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io.to(`${socket.id}`).emit('init-room');
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socket.on('join-room', roomID => {
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console.log(`${socket.id} has joined ${roomID}`);
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socket.join(roomID);
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if (io.sockets.adapter.rooms[roomID].length <= 1) {
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io.to(`${socket.id}`).emit('first-in-room');
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} else {
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socket.broadcast.to(roomID).emit('new-user', socket.id);
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}
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io.in(roomID).emit(
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'room-user-count',
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io.sockets.adapter.rooms[roomID].length,
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);
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});
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socket.on('server-broadcast', (roomID: string, encryptedData: ArrayBuffer, iv: Uint8Array) => {
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console.log(`${socket.id} sends update to ${roomID}`);
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socket.broadcast.to(roomID).emit('client-broadcast', encryptedData, iv);
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});
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socket.on('disconnecting', () => {
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const rooms = io.sockets.adapter.rooms;
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for (const roomID in socket.rooms) {
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const remaining = rooms[roomID].length - 1;
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if (remaining > 0) {
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socket.broadcast.to(roomID).emit('room-user-count', remaining);
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}
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}
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});
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socket.on('disconnect', () => {
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socket.removeAllListeners();
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});
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});
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