Telegram Bot Command Router

## Setup Guide 1. **Create Telegram Bot**: Message @BotFather on Telegram, send /newbot, choose a name and username. Save the API token. 2. **Register Webhook**: In n8n, create a Webhook node (Production URL). Register it with Telegram: ``` curl -X POST https://api.telegram.org/bot<YOUR_TOKEN>/setWebhook \ -d url=https://your-n8n-instance.com/webhook/your-webhook-path ``` 3. **Webhook node**: Configure as POST, respond "When Last Node Finishes" 4. **Function node (Parser)**: Extract command from message text: ```javascript const text = $input.first().json.message.text; const match = text.match(/^\/(\w+)(?:\s+(.+))?/); return { command: match ? match[1] : 'unknown', args: match ? (match[2] || '').split(' ') : [], chat_id: $input.first().json.message.chat.id, user: $input.first().json.message.from }; ``` 5. **Switch node**: Route by command value: - **/help** → HTTP Request: sendMessage with list of available commands - **/status** → Query your monitoring system, format results, send reply - **/stats** → Query metrics DB, send formatted stats - **/alert** → Parse alert target and message, forward to Slack/email - **/echo** → Send back the arguments (useful for testing) - **/whoami** → Reply with Telegram user info - **Default** → Send "Unknown command. Try /help" 6. **HTTP Request node (Telegram API)**: For each response, call: ``` POST https://api.telegram.org/bot<TOKEN>/sendMessage { chat_id: {{ chat_id }}, text: "Your response", parse_mode: "Markdown" } ``` > 💡 **Pro tip**: Add a "cooldown" check at the start — if the same user sends more than 10 commands in 30 seconds, temporarily ignore them with a "rate limit" reply.