tg-bot-reminder/TutorialBot.ts

import { Bot, InlineKeyboard } from 'grammy'
import open from 'open'

//Store bot screaming status
let screaming = false

//Create a new bot
const bot = new Bot(process.env.BOT_API_TOKEN)

//This function handles the /scream command
bot.command('scream', () => {
  screaming = true
})

//This function handles /whisper command
bot.command('whisper', () => {
  screaming = false
})

//Pre-assign menu text
const firstMenu =
  '<b>Добро пожаловать</b>\n\nЭтот бот позволит вам отправлять \nотложенные сообщения в чаты.'
const secondMenu =
  '<b>Добро пожаловать</b>\n\nДля этого, вам нужно выбрать чат \nи указать текст сообщения и даты отправки.'

//Pre-assign button text
const nextButton = 'Далее'
const backButton = 'Назад'
const tutorialButton = 'Обучение'

//Build keyboards
const firstMenuMarkup = new InlineKeyboard().text(nextButton)

const secondMenuMarkup = new InlineKeyboard()
  .text(backButton)
  .text(tutorialButton)

//This handler sends a menu with the inline buttons we pre-assigned above
bot.command('menu', async (ctx: any) => {
  await ctx.reply(firstMenu, {
    parse_mode: 'HTML',
    reply_markup: firstMenuMarkup
  })
})

//This handler processes back button on the menu
bot.callbackQuery(backButton, async (ctx: any) => {
  //Update message content with corresponding menu section
  try {
    await ctx.editMessageText(firstMenu, {
      reply_markup: firstMenuMarkup,
      parse_mode: 'HTML'
    })
  } catch (error) {
    console.log(error)
  }
})

//This handler processes next button on the menu
bot.callbackQuery(nextButton, async (ctx: any) => {
  //Update message content with corresponding menu section
  try {
    await ctx.editMessageText(secondMenu, {
      reply_markup: secondMenuMarkup,
      parse_mode: 'HTML'
    })
  } catch (error) {
    console.error(error)
  }
})

//This handler processes tutorial button on the menu
bot.callbackQuery(tutorialButton, async (ctx: any) => {
  //Open link in browser
  try {
    await open('https://core.telegram.org/bots/tutorial')
  } catch (error) {
    console.error(error)
  }
})

//This function would be added to the dispatcher as a handler for messages coming from the Bot API
bot.on('message', async (ctx: any) => {
  //Print to console
  console.log(
    `${ctx.from.first_name}: ${'text' in ctx.message ? ctx.message.text : ''}`
  )

  if (screaming && ctx.message.text) {
    //Scream the message
    await ctx.reply(ctx.message.text.toUpperCase(), {
      entities: ctx.message.entities
    })
  } else {
    //This is equivalent to forwarding, without the sender's name
    await ctx.copyMessage(ctx.message.chat.id)
  }
})

//Start the Bot
bot.start()