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79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
const { markdown2Html } = require('../../services/markdown');
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const axios = require('axios');
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/**
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* splitting an array into chunks because Telegram only allows for messages up to
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* 4096 chars, thus we have to split messages into chunks
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* @param inputArray
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* @param perChunk
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*/
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const arrayChunks = (inputArray, perChunk) =>
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inputArray.reduce((all, one, i) => {
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const ch = Math.floor(i / perChunk);
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all[ch] = [].concat(all[ch] || [], one);
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return all;
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}, []);
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/**
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* sends new listings to telegram
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* @param serviceName e.g immowelt
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* @param newListings an array with newly found listings
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* @param notificationConfig config of this notification adapter
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* * @param jobKey name of the current job that is being executed
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* @returns {Promise<Void> | void}
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*/
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exports.send = ({ serviceName, newListings, notificationConfig, jobKey }) => {
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const { token, chatId } = notificationConfig.find((adapter) => adapter.id === 'telegram').fields;
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//we have to split messages into chunk, because otherwise messages are going to become too big and will fail
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const chunks = arrayChunks(newListings, 3);
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const promises = chunks.map((chunk) => {
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let message = `Job: ${jobKey} | Service <b>${serviceName}</b> found <b>${newListings.length}</b> new listings:\n\n`;
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message += chunk.map(
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(o) =>
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`<b>${shorten(o.title.replace(/\*/g, ''), 45)}</b>\n` +
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[o.address, o.price, o.size].join(' | ') +
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'\n' +
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`<a href="${o.link}">${o.link}</a>\n\n`
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);
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return axios.post(`https://api.telegram.org/bot${token}/sendMessage`, {
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chat_id: chatId,
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text: message,
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parse_mode: 'HTML',
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disable_web_page_preview: true,
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});
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});
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return Promise.all(promises);
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};
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function shorten(str, len = 30) {
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return str.length > len ? str.substring(0, len) + '...' : str;
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}
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/**
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* exported config is being used in the frontend to generate the fields
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* incoming values will be the keys (and values) of the fields
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*
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*/
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exports.config = {
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id: __filename.slice(__dirname.length + 1, -3),
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name: 'Telegram',
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readme: markdown2Html('lib/notification/adapter/telegram.md'),
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description: 'Fredy will send new listings to your mobile, using Telegram.',
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fields: {
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token: {
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type: 'text',
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label: 'Token',
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description: 'The token needed to access this service.',
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},
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chatId: {
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type: 'chatId',
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label: 'Chat Id',
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description: 'The chat id to send messages to you.',
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},
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},
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};
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