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app.js
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app.js
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const express = require('express');
const { createServer } = require('http');
const { Server } = require('socket.io');
const cors = require('cors');
const mongoose = require('mongoose');
const dotenv = require('dotenv');
const morgan = require('morgan');
const path = require('path');
const helmet = require('helmet');
const mongoSanitize = require('express-mongo-sanitize');
const compression = require('compression');
const userRouter = require('./routes/userRoute');
const postRouter = require('./routes/postRoute');
const conversationRouter = require('./routes/conversationRoute');
const messageRouter = require('./routes/messageRoute');
const commentRouter = require('./routes/commentRoute');
const errorController = require('./controller/errorController');
const appError = require('./utils/appError');
const { InMemorySessionStore } = require('./store/sessionStore');
const sessionStore = new InMemorySessionStore();
dotenv.config({ path: './.env' });
// Database Connection
const DB = process.env.DATABASE.replace(
'<PASSWORD>',
process.env.DATABASE_PASSWORD
);
mongoose
.connect(DB)
// eslint-disable-next-line no-console
.then(() => console.log('Database Connected Successfully'))
// eslint-disable-next-line no-console
.catch(err => console.log(err));
// Initialize App
const app = express();
app.enable('trust proxy');
const allowedOrigins = [
'https://mad-chatter-app.web.app',
'https://mad-chatter-app.firebaseapp.com'
];
const corsDelegation = function (request, callback) {
let corsOptions;
if (allowedOrigins.indexOf(request.headers('Origin')) !== -1) {
corsOptions = {
origin: true,
methods: 'GET,HEAD,POST,PUT,PATCH,DELETE',
allowedHeaders: [
'*',
'Content-Type',
'Authorization',
'Origin',
'Accept',
'Access-Control-Allow-Origin'
],
exposedHeaders: [
'Content-Range',
'Content-Encoding',
'Access-Control-Allow-Origin'
],
maxAge: 3600,
preflightContinue: false,
optionsSuccessStatus: 204
};
} else {
corsOptions = { origin: false };
}
callback(null, corsOptions);
};
const httpServer = createServer(app);
const io = new Server(httpServer, {
cors: {
origin: [
'https://mad-chatter-app.web.app',
'https://mad-chatter-app.firebaseapp.com'
]
}
});
// Server Port
const port = process.env.PORT || 3000;
app.use(cors());
app.options('*', cors(corsDelegation));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(express.static(path.join('public', 'images')));
app.use(
helmet({
hidePoweredBy: true
})
);
console.log(app.enabled('trust proxy'));
// Global Middleware
if (process.env.NODE_ENV === 'development') {
app.use(morgan('dev'));
}
app.use(mongoSanitize());
app.use(compression());
// Routes
app.use('/api/users', userRouter);
app.use('/api/posts', postRouter);
app.use('/api/comments', commentRouter);
app.use('/api/conversations', conversationRouter);
app.use('/api/messages', messageRouter);
// Error Middleware
app.use(errorController);
// app.all('*', (req, res, next) => {
// // eslint-disable-next-line new-cap
// next(new appError(`Can't find ${req.originalUrl} on this server!`, 404));
// });
io.use((socket, next) => {
const sessionId = socket.handshake.auth._id;
if (sessionId) {
const session = sessionStore.findSession(sessionId);
if (session) {
socket.sessionId = sessionId;
socket.userId = session.userId;
socket._id = session.userId;
socket.username = session.username;
return next();
}
}
socket.sessionId = socket.handshake.auth._id;
socket.userId = socket.handshake.auth.userId;
socket.username = socket.handshake.auth.username;
socket._id = socket.handshake.auth._id;
if (!sessionId)
// eslint-disable-next-line new-cap
return next(new appError('Trouble connecting. Please reload.', 400));
next();
});
io.on('connection', async socket => {
sessionStore.saveSession(socket.sessionId, {
userId: socket.userId,
username: socket.username,
connected: true
});
socket.emit('session', {
sessionId: socket.sessionId,
userId: socket.userId
});
socket.join(socket.userId);
const users = [];
sessionStore.findAllSessions().forEach(session => {
users.push({
userId: session.userId,
username: session.username,
connected: session.connected
});
});
socket.emit('users', users);
socket.broadcast.emit('userConnected', {
userId: socket.userId,
connected: true
});
socket.on('privateMessage', ({ content, to, from }) => {
socket.to(to._id).to(socket.userId).emit('privateMessage', {
content,
to,
from
});
});
socket.on('disconnect', async () => {
const matchingSockets = await io.in(socket.userId).allSockets();
const isDisconnected = matchingSockets.size === 0;
if (isDisconnected) {
socket.broadcast.emit('user disconnected', socket.userId);
sessionStore.saveSession(socket.sessionId, {
userId: socket.userId,
username: socket.username,
connected: false
});
}
});
});
// Server Listening
httpServer.listen(port, () => {
// eslint-disable-next-line no-console
console.log(`Listening on port ${port}`);
});
module.exports = httpServer;