index.js

import { Telegraf } from 'telegraf'
import { message } from 'telegraf/filters'
import { configDotenv } from 'dotenv';
import  {connection}  from './config/db.js';
import User from './model/User.js';
configDotenv();

const Token = process.env.BOT_TOKEN

const bot = new Telegraf(Token)

connection();

bot.start(async(ctx)=> {
  const from = ctx.update.message.from
  try {
   const result =  await User.findOneAndUpdate({telegramId: from.id},
      {
        $setOnInsert:{
          firstName: from.first_name,
          username: from.username,
          isBot:from.is_bot,
        },
      },
      {upsert:true,new:true}
    );
    console.log(result);
    await ctx.reply(`Welcome to MyAI ${from.first_name}`)
  } catch (error) {
    console.log(error.message);
    await ctx.reply("something went wrong")
    process.kill(process.pid,'SIGTERM')

  }
})

// bot.on(message('text'), async (ctx) => {
//   await ctx.telegram.sendMessage(ctx.message.chat.id, `Hello ${ctx.from.first_name} how can i help you`)
// });


bot.launch()

process.once('SIGINT', () => bot.stop('SIGINT'))
process.once('SIGTERM', () => bot.stop('SIGTERM'))