Update google-cloud-function.ts

examples/functions/google-cloud-function.ts

@@ -1,9 +1,37 @@
-// TODO: this needs its own full example like the one for aws-lambda
+// here's a real working example of using firebase functions via a webhook
 
-import { Telegraf } from "telegraf";
+import { onRequest } from 'firebase-functions/v2/https';
+import * as logger from 'firebase-functions/logger';
+import { Telegraf, Context } from 'telegraf';
+import { message } from 'telegraf/filters';
 
-const bot = new Telegraf(token);
+// create a new bot instance that will handle the updates and reply via webhook
+const bot = new Telegraf(process.env.TELEGRAM_BOT_TOKEN as string,{telegram: { webhookReply: true }});
 
-bot.command("hello", ctx => ctx.reply("Hello, friend!"));
+// register the commands and event handlers IN THE ORDER they will be executed
+bot.command('start', (ctx: Context) => ctx.reply('Welcome!'));
+bot.command('help', (ctx: Context) => ctx.reply('How can I assist you?'));
+bot.hears('hi', (ctx) => ctx.reply('Hey there'));
+bot.on(message('sticker'), (ctx) => ctx.reply('👍'));
+bot.on(message('new_chat_members'), async (ctx) => {
+  logger.info('new_chat_members:', ctx.update.message.new_chat_members);
+  const newMembers = ctx.message.new_chat_members;
+  newMembers.forEach((member) => {
+    ctx.reply(`Welcome ${member.first_name} to the group!`);
+  });
+});
+
+// message seems to be the default handler for most other message type
+bot.on(message('text'), (ctx: Context) => ctx.reply('Hello!'));
+
+export const myBot = onRequest(async (request, response) => {
+  try {
+    logger.log(JSON.stringify(request.body)); // for debugging - remove in production
+    await bot.handleUpdate(request.body, response);
+    response.status(200).end();
+  } catch (err) {
+    logger.error('Failed to process update', err);
+    response.sendStatus(500);
+  }
+});
 
-export const botFunction = bot.webhookCallback(bot.secretPathComponent());