Initial server

index.js

@@ -0,0 +1,99 @@
+const express = require('express');
+const app = express();
+const http = require('http');
+const server = http.createServer(app);
+const { Server, Socket } = require("socket.io");
+const { instrument } = require("@socket.io/admin-ui");
+const io = new Server(server);
+
+class Client {
+    constructor(login, password) {
+        this.login = login;
+        this.password = password;
+    }
+}
+
+class Game {
+    constructor(id, player1, player2) {
+        this.id = id;
+        this.player1 = player1;
+        this.player2 = player2;
+        this.turn = 1;
+        this.board = [
+            [0, 0, 0],
+            [0, 0, 0],
+            [0, 0, 0]
+        ];
+    }
+}
+
+/** @type {Client[]} */
+let registeredClients = [];
+
+/** @type {Map<Socket, Client>} */
+let onlineClients = new Map();
+
+let games = [];
+
+app.get('/', (req, res) => {
+    res.send('<h1>Hello world</h1>');
+});
+
+io.on('connection', (socket) => {
+    console.log('someone connected');
+
+    socket.on('register', (login, password) => {
+        console.log('user send register with login: ' + login + ' and password: ' + password);
+        if (login.length < 3 || login.length > 20 || password.length < 3 || password.length > 20) {
+            socket.emit('register', false, 'Login or password is too short or too long');
+            console.log('user tried to register with too short or too long login or password');
+            return;
+        }
+        if (registeredClients.find(client => client.login === login)) {
+            socket.emit('register', false, 'User with this login already exists');
+            console.log('user tried to register with existing login');
+            return;
+        }
+        registeredClients.push(new Client(login, password));
+        onlineClients.set(socket, new Client(login, password));
+        socket.emit('register', true, 'User registered successfully');
+        console.log('user registered successfully');
+    });
+
+    socket.on('login', (login, password) => {
+        console.log('user send login with login: ' + login + ' and password: ' + password);
+        if (login.length < 3 || login.length > 20 || password.length < 3 || password.length > 20) {
+            socket.emit('login', false, 'Login or password is too short or too long');
+            console.log('user tried to login with too short or too long login or password');
+            return;
+        }
+        if (!registeredClients.find(client => client.login === login)) {
+            socket.emit('login', false, 'User with this login does not exist');
+            console.log('user tried to login with non existing login');
+            return;
+        }
+        if (registeredClients.find(client => client.login === login && client.password !== password)) {
+            socket.emit('login', false, 'Wrong password');
+            console.log('user tried to login with wrong password');
+            return;
+        }
+        onlineClients.set(socket, new Client(login, password));
+        socket.emit('login', true, 'User logged in successfully');
+    });
+
+    socket.on('disconnect', () => {
+        if (onlineClients.has(socket)) {
+            console.log('user ' + onlineClients.get(socket).login + ' disconnected');
+        } else {
+            console.log('anonymous disconnected');
+        }
+    });
+});
+
+instrument(io, {
+    auth: false
+});
+
+server.listen(9800, () => {
+    console.log('listening on *:9800');
+});