Cara Build Telegram Bot dengan AI (Node.js + OpenAI)

mkdir my-ai-bot
cd my-ai-bot
npm init -y
npm install node-telegram-bot-api openai dotenv

TELEGRAM_BOT_TOKEN=your-telegram-token
OPENAI_API_KEY=sk-your-openai-key

require('dotenv').config();
const TelegramBot = require('node-telegram-bot-api');
const OpenAI = require('openai');

// Initialize
const bot = new TelegramBot(process.env.TELEGRAM_BOT_TOKEN, { polling: true });
const openai = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });

// Storage for conversation history (per user)
const conversations = {};

// Handle /start command
bot.onText(/\/start/, (msg) => {
    const chatId = msg.chat.id;
    conversations[chatId] = [];
    bot.sendMessage(chatId, 
        'Halo! 👋 Aku AI Bot. Kirim pesan apa aja dan aku akan jawab pakai AI.

' +
        'Ketik /clear untuk clear history.'
    );
});

// Handle /clear command
bot.onText(/\/clear/, (msg) => {
    const chatId = msg.chat.id;
    conversations[chatId] = [];
    bot.sendMessage(chatId, '✅ History cleared!');
});

// Handle all messages
bot.on('message', async (msg) => {
    const chatId = msg.chat.id;
    const userMessage = msg.text;
    
    // Skip commands
    if (userMessage.startsWith('/')) return;
    
    // Initialize conversation history
    if (!conversations[chatId]) {
        conversations[chatId] = [];
    }
    
    // Add user message to history
    conversations[chatId].push({ role: 'user', content: userMessage });
    
    // Keep only last 10 messages to avoid token limit
    if (conversations[chatId].length > 10) {
        conversations[chatId] = conversations[chatId].slice(-10);
    }
    
    try {
        // Show typing indicator
        bot.sendChatAction(chatId, 'typing');
        
        // Call OpenAI API
        const completion = await openai.chat.completions.create({
            model: 'gpt-4',
            messages: [
                { role: 'system', content: 'Kamu adalah asisten AI yang helpful dan ramah. Jawab dalam Bahasa Indonesia.' },
                ...conversations[chatId]
            ],
            temperature: 0.7,
            max_tokens: 1000
        });
        
        const reply = completion.choices[0].message.content;
        
        // Add reply to history
        conversations[chatId].push({ role: 'assistant', content: reply });
        
        // Send reply
        bot.sendMessage(chatId, reply);
        
    } catch (error) {
        console.error('OpenAI Error:', error);
        bot.sendMessage(chatId, '❌ Maaf, ada error. Coba lagi nanti.');
    }
});

console.log('🤖 Bot is running...');

node bot.js

bot.onText(/\/image (.+)/, async (msg, match) => {
    const chatId = msg.chat.id;
    const prompt = match[1];
    
    try {
        const image = await openai.images.generate({
            model: "dall-e-3",
            prompt: prompt,
            n: 1,
            size: "1024x1024"
        });
        
        bot.sendPhoto(chatId, image.data[0].url);
    } catch (error) {
        bot.sendMessage(chatId, '❌ Gagal generate image.');
    }
});

bot.onText(/\/code (.+)/, async (msg, match) => {
    const chatId = msg.chat.id;
    const request = match[1];
    
    try {
        const completion = await openai.chat.completions.create({
            model: 'gpt-4',
            messages: [
                { role: 'system', content: 'Generate code based on request. Wrap in ```codeblock.' },
                { role: 'user', content: request }
            ]
        });
        
        bot.sendMessage(chatId, completion.choices[0].message.content, { parse_mode: 'Markdown' });
    } catch (error) {
        bot.sendMessage(chatId, '❌ Error generating code.');
    }
});

const rateLimit = {};

function checkRateLimit(userId) {
    const now = Date.now();
    if (!rateLimit[userId]) {
        rateLimit[userId] = [];
    }
    
    // Remove messages older than 1 minute
    rateLimit[userId] = rateLimit[userId].filter(t => now - t < 60000);
    
    if (rateLimit[userId].length >= 5) {
        return false; // Rate limited
    }
    
    rateLimit[userId].push(now);
    return true; // OK
}

// Use in message handler:
if (!checkRateLimit(msg.from.id)) {
    bot.sendMessage(chatId, '⚠️ Rate limit! Tunggu 1 menit.');
    return;
}

npm install -g pm2
pm2 start bot.js --name "ai-bot"
pm2 save
pm2 startup

FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
CMD ["node", "bot.js"]

docker build -t ai-bot .
docker run -d --restart unless-stopped --name ai-bot ai-bot