My project for the challenge

defi06/javascript/simpleIrcClient.js

@@ -0,0 +1,331 @@
+// ==========================================
+//          BY TrétinV3#7056
+// ==========================================
+
+// v2.1.0
+
+/*\
+ |
+ |  How to use ?
+ |
+ |  Juste run `node simpleIrcClient.js` and follow instructions
+ |  /!\ A json file "db.json" will be create for save your servers /!\
+ |
+ |  Any bug ? -> Discord TrétinV3#7056 or Github https://github.com/TretinV3/SimpleIRC
+ |
+ |  Thanks NotAName for the idea (https://discord.gg/NotAName)
+ |
+\*/
+
+const net = require('net');
+const readline = require('readline');
+const fs = require("fs");
+
+let client = new net.Socket();
+const rl = readline.createInterface({
+    input: process.stdin,
+    output: null,
+    terminal: true,
+    prompt: "",
+});
+
+let ip, port, name, id;
+
+const clientState = {
+    home: 0,
+    pseudo: 1,
+    server: 2,
+    createServer: 3,
+    password: 4,
+    run: 10,
+    quit: -1,
+}
+
+let state = clientState.home;
+
+start();
+
+function start() {
+    clear();
+    console.log(
+        "\t┌────────────────────────┐\n" +
+        "\t│                        │\n" +
+        "\t│    SIMPLE IRC CLIENT   │\n" +
+        "\t│                        │\n" +
+        "\t│            by TretinV3 │\n" +
+        "\t└────────────────────────┘\n" +
+        "\n\n\t\tpress [ENTER]\n\n\n\n"
+    )
+    state = clientState.home;
+}
+
+function choseUser(pseudo) {
+    if (!pseudo) {
+        state = clientState.pseudo;
+        clear();
+        console.log(
+            "Chose your username :\n" +
+            "\n\n\n\n\n\n"
+        )
+    } else {
+        name = pseudo;
+        choseServeur();
+    }
+}
+
+async function choseServeur(input) {
+
+    if (!await fileExists("./db.json")) {
+        await fs.writeFileSync('./db.json', JSON.stringify({ servers: [] }));
+    }
+    const db = JSON.parse(fs.readFileSync("./db.json"));
+    state = clientState.server;
+    if (!input
+        || isNaN(Number(input))
+        || Number(input) > db.servers.length
+        || Number(input) < (db.servers.length * -1)
+    ) {
+        clear();
+        console.log(
+            "Chose the IRC server to connect :\n"
+        );
+        for (let i = 0; i < db.servers.length; i++) {
+            console.log(`(${i + 1}) ${db.servers[i]}`);
+        }
+        console.log(
+            "\n" +
+            "Type 0 for add a new IRC server and add a \"-\" for remove it\n" +
+            "\n\n\n\n\n"
+        )
+    } else {
+        input = Number(input);
+        if (input == 0) {
+            addServeur();
+        } else if (input > 0) {
+            id = input;
+            setPassword(true);
+        } else if (input < 0) {
+            db.servers.splice((input * -1) - 1, 1)
+            fs.writeFileSync('./db.json', JSON.stringify(db, null, 2))
+            choseServeur();
+        }
+    }
+}
+
+function setPassword(init, pass) {
+    state = clientState.password;
+    if (init) {
+        clear();
+        console.log(
+            "Type your password (leave blank if you haven't)\n\n\n\n\n\n"
+        )
+    } else {
+        selectServeur(id, pass);
+    }
+}
+
+const fileExists = async path => !!(await fs.promises.stat(path).catch(e => false));
+
+async function selectServeur(i, pass) {
+
+    const db = JSON.parse(fs.readFileSync("./db.json"));
+    port = db.servers[i - 1].split(":")[1];
+    ip = db.servers[i - 1].split(":")[0];
+    clear();
+
+    client.connect(port, ip, () => {
+        state = clientState.run;
+        console.log('[clientIRC] Connected to server');
+        console.log("[clientIRC] Try to log in...")
+        if (pass) client.write(`PASS ${pass}\r\n`);
+        client.write(`NICK ${name}\r\n`);
+        client.write(`USER ${name} foo bar :foo bar\r\n`);
+    });
+}
+
+client.on('error', e => {
+    if (state !== clientState.quit) {
+        if (e.code == "ECONNREFUSED") {
+            console.log('[clientIRC] Could not connect to server...')
+        } else {
+            console.log('[clientIRC] An error occurred...')
+        }
+        setTimeout(() => {
+            choseServeur();
+        }, 1000);
+    }
+});
+
+function addServeur(input) {
+    state = clientState.createServer;
+    const db = JSON.parse(fs.readFileSync("./db.json"));
+    if (!input) {
+        clear();
+        console.log(
+            "Type the address of the server (the default port is 6667) :\n" +
+            "\n\n\n\n\n\n"
+        )
+    } else {
+        if (!input.split(":")[1]) input += ":6667";
+        db.servers.push(input);
+        fs.writeFileSync("./db.json", JSON.stringify(db, null, 3))
+        choseServeur();
+    }
+}
+
+let channel = null;
+
+function run(input) {
+    input = input.split(/\s+/).join(" ");
+    const args = input.split(/\s+/);
+    process.stdout.write(`\n`);
+    if (input.startsWith("//")) {
+        client.write(`${input.slice(2)}\r\n`);
+    } else if (input.startsWith("/")) {
+        const command = args[0];
+        switch (command) {
+            case "/join":
+                if (channel) client.write(`PART ${channel}\r\n`)
+                client.write(`JOIN ${args[1]}\r\n`)
+                channel = args[1];
+                break;
+            case "/mp":
+                client.write(`PRIVMSG ${args[1]} :${args.slice(2).join(" ")}\r\n`);
+                channel = args[1];
+                break;
+            case "/help":
+                console.log("[clientIRC] This is the list of all the commands :\n" +
+                    "[clientIRC] /help - get the list of all commands\n" +
+                    "[clientIRC] /join <channel> - join a channel\n" +
+                    "[clientIRC] /mp <user> - send a private message to a user\n" +
+                    "[clientIRC] use //<command> for use any IRC command\n");
+                break;
+
+            default:
+                console.log('Unknown command, type /help for the list of all commands')
+                break;
+        }
+    } else {
+        if (channel) {
+            client.write(`PRIVMSG ${channel} :${input}\r\n`);
+        } else {
+            console.log("[clientIRC] please join a channel first")
+        }
+    }
+}
+
+function clear() {
+    const blank = '\n'.repeat(process.stdout.rows)
+    console.log(blank)
+}
+
+client.on('end', () => {
+    if (state !== clientState.quit) {
+        process.stdout.write(`\rConnection closed!`)
+
+        setTimeout(() => {
+            start();
+        }, 2000);
+    }
+})
+
+process.stdin.on('keypress', (c, k) => {
+    showResults();
+});
+
+let lastLengthInput = 0;
+function showResults() {
+    let space = ""
+    for (let i = 0; i < lastLengthInput; i++) {
+        space += " ";
+    }
+    let string = rl.line
+    let cursorDelta = 0;
+    if (state == clientState.run) {
+        if (rl.line.startsWith('/mp') && rl.line.split(/\s+/).length >= 3) {
+            string = `[me -> ${rl.line.split(/\s+/)[1]}] ${rl.line.split(/\s+/).splice(2).join(' ')}`;
+            cursorDelta = 4;
+        } else {
+            string = `${rl.line.startsWith("/") || rl.line.replace(/[ ,]+/, "").length === 0 ? "" : `<${name}> `}${rl.line}`;
+        }
+    } else if (state == clientState.password) {
+        string = '*'.repeat(rl.line.length)
+    }
+    lastLengthInput = string.length;
+    process.stdout.write(`\r${string}${space}`);
+    readline.cursorTo(process.stdout, string.length - (string.length - rl.cursor) + cursorDelta);
+}
+
+client.on('data', (data) => {
+    data = data.toString('utf-8');
+    if (data.startsWith("PING")) {
+        client.write(`PONG ${ip}\r\n`);
+    } else {
+        if (data.startsWith(':') && !data.startsWith(`:${ip}`)) {
+            const args = data.split(" ");
+            if (args[1] == "PRIVMSG" && args[2] == channel) {
+                process.stdout.write(`\r<${args[0].slice(1).split('!')[0]}> ${data.split(":")[2].slice(0, -2)}\n`)
+            } else if (args[2] == name) {
+                process.stdout.write(`\r[${args[0].slice(1).split('!')[0]} -> me] ${data.split(":")[2].slice(0, -2)}\n`)
+            } else if (args[1] == "JOIN") {
+                process.stdout.write(`\r**${args[0].slice(1).split('!')[0]} a rejoin ${args[2].split(':')[1].slice(0, -2)}**\n`)
+            } else if (args[1] == "PART") {
+                process.stdout.write(`\r**${args[0].slice(1).split('!')[0]} a quité ${args[2].split(':')[1].slice(0, -2)}**\n`)
+            } else {
+                process.stdout.write("\rserver : " + data + "\n");
+            }
+        } else {
+            process.stdout.write("\rserver : " + data + "\n");
+        }
+    }
+});
+
+rl.on('line', (line) => {
+
+    switch (state) {
+        case clientState.home:
+            choseUser();
+            break;
+        case clientState.pseudo:
+            choseUser(line);
+            break;
+        case clientState.server:
+            choseServeur(line);
+            break;
+        case clientState.createServer:
+            addServeur(line);
+            break;
+        case clientState.password:
+            setPassword(false, line)
+            break
+        case clientState.run:
+            run(line);
+            break;
+        default:
+            break;
+    }
+});
+rl.on('close', () => {
+    state = clientState.quit
+    if (client) {
+        if (client.writable) client.write('QUIT\r\n');
+        setTimeout(() => {
+            client.end();
+        }, 500);
+    }
+    clear()
+    console.log('\t\tBye !\n\n\n\n')
+});
+
+// I am french sorry for my english ;-)
+
+
+
+/*
+    ====================================================================================
+    This work is licensed under the Creative Commons
+    Attribution-NonCommercial 4.0 International License.
+    To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/4.0/
+    or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
+    ====================================================================================
+*/