Added last update, cache strategy, telegram fail notifications, teachers photos

src/app/logger.ts

@@ -0,0 +1,18 @@
+import TelegramBot from 'node-telegram-bot-api'
+
+const token = process.env.PARSING_FAILURE_NOTIFICATIONS_TELEGRAM_BOTAPI_TOKEN
+const ownerID = process.env.PARSING_FAILURE_NOTIFICATIONS_TELEGRAM_CHAT_ID
+
+let bot: TelegramBot
+if (!token || !ownerID) {
+  console.warn('Telegram Token is not specified. This means you won\'t get any notifications about parsing failures.')
+} else {
+  bot = new TelegramBot(token, { polling: false })
+}
+
+
+export async function reportParserError(...text: string[]) {
+  if (!token || !ownerID) return
+
+  await bot.sendMessage(ownerID, text.join(' '))
+}