@jackdbd/notifications/lib/telegram.js

Functions used to send notifications to various channels (Telegram, email, etc)

import { debuglog } from 'node:util';
import phin from 'phin';
const debug = debuglog('notifications/telegram');
/**
 * https://core.telegram.org/bots/api#making-requests
 */
const errorMessageFromTelegramApi = ({ chat_id, description, error_code }) => {
    switch (error_code) {
        case 400: {
            return description;
        }
        case 404: {
            return `Telegram chat id ${chat_id} not found`;
        }
        default: {
            return description;
        }
    }
};
/**
 * Send a text message to a Telegram chat, using the Telegram API.
 *
 * https://core.telegram.org/bots/api#sendmessage
 */
export const send = async ({ chat_id, text, token }, options) => {
    if (!chat_id) {
        throw new Error('chat_id not set');
    }
    if (!token) {
        throw new Error('token not set');
    }
    debug(`send Telegram message to chat id ${chat_id}`);
    const data = {
        chat_id,
        disable_notification: options?.disable_notification || true,
        disable_web_page_preview: options?.disable_web_page_preview || false,
        parse_mode: options?.parse_mode || 'HTML',
        text
    };
    try {
        const res = await phin({
            data,
            headers: { 'Content-Type': 'application/json' },
            method: 'POST',
            parse: 'json',
            url: `https://api.telegram.org/bot${token}/sendMessage`
        });
        if (!res.body.ok) {
            const b = res.body;
            debug(`Telegram message was NOT delivered to chat id ${chat_id}. Original Telegram API response: %O`, b);
            return {
                delivered: false,
                message: errorMessageFromTelegramApi({
                    chat_id,
                    description: b.description,
                    error_code: b.error_code
                })
            };
        }
        else {
            const b = res.body;
            debug(`Telegram message delivered to chat id ${chat_id}. Original Telegram API response: %O`, b);
            const r = b.result;
            const delivered_at = new Date(r.date * 1000).toISOString();
            return {
                delivered: true,
                delivered_at,
                message: `message id ${r.message_id} delivered to chat id ${r.chat.id} (username ${r.chat.username}) by bot ${r.from.first_name}`
            };
        }
    }
    catch (err) {
        debug(`Telegram API could not respond. Original error: %O`, err);
        throw new Error(`Telegram API could not respond: ${err.message}`);
    }
};
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