app.js

const express = require('express')
const http = require('http')
const { Server } = require('socket.io')
const cors = require("cors")
const { sendLogsLogin } = require('./function.js')
const app = express()
const server = http.createServer(app)
const io = new Server(server, {
    cors: {
        origin: "*",
        methods: ["GET", "POST"],
        allowedHeaders: ["Content-Type"],
        credentials: true
    }
})
const PORT = 3000
const activeUsers = new Map()

app.use(cors({
    origin: '*',
    methods: ['GET', 'POST'],
    credentials: true
}))

app.use(express.json())
app.use(express.urlencoded({ extended: true }));

app.post("/", (req, res) => {
    const { action, user } = req.body
    let response = ''
    let users = []
    if (action == 'statusUser') {
        if (activeUsers.has(user)) {
            response = 'good'
        } else {
            response = 'kdl'
        }
    } else if (action == 'getAllOnline') {
        activeUsers.forEach((key, value) => {
            users.push(value)
        })
        response = users
    }
    res.json({"response": response})
})
io.on('connection', (socket) => {
    const ipAddress = socket.handshake.address
    socket.on('disconnect', () => {
        activeUsers.forEach((id, userId) => {
            if (id === socket.id) {
                activeUsers.delete(userId)
            }
        })
    })
    socket.on('login', (userId) => {
        if (activeUsers.has(userId)) {
            const oldSocketId = activeUsers.get(userId)
            io.to(oldSocketId).emit('forceDisconnect')
            activeUsers.set(userId, socket.id)
        } else {
            activeUsers.set(userId, socket.id)
        }
        socket.emit('login-success', JSON.stringify({ sessionid: socket.id, username: userId }))
        sendLogsLogin({ sessionid: socket.id, username: userId, origin: ipAddress })
    })
})
server.listen(PORT, () => {
    console.log(`Serveur lancé sur http://localhost:${PORT}`)
})