telegraf-keyboard-bot on Google Cloud Functions

index.js

/**
 * telegraf-keyboard-bot
 *
 * Function to execute: handleRequest
 *
 * Required environment variables:
 *
 *  - TELEGRAM_BOT_AUTHENTICATION_TOKEN
 *
 * Run
 *   curl 'https://api.telegram.org/bot<TELEGRAM_BOT_AUTHENTICATION_TOKEN>/setWebhook?url=<CLOUD_FUNCTION_URL>'
 * to register the bot.
 *
 */

const Telegraf = require('telegraf')
const Extra = require('telegraf/extra')
const Markup = require('telegraf/markup')

const bot = new Telegraf(process.env.TELEGRAM_BOT_AUTHENTICATION_TOKEN)

////////////

bot.command('onetime', ({ reply }) =>
  reply('One time keyboard', Markup
    .keyboard(['/simple', '/inline', '/pyramid'])
    .oneTime()
    .resize()
    .extra()
  )
)

bot.command('custom', ({ reply }) => {
  return reply('Custom buttons keyboard', Markup
    .keyboard([
      ['🔍 Search', '😎 Popular'], // Row1 with 2 buttons
      ['☸ Setting', '📞 Feedback'], // Row2 with 2 buttons
      ['📢 Ads', '⭐️ Rate us', '👥 Share'] // Row3 with 3 buttons
    ])
    .oneTime()
    .resize()
    .extra()
  )
})

bot.hears('🔍 Search', ctx => ctx.reply('Yay!'))
bot.hears('📢 Ads', ctx => ctx.reply('Free hugs. Call now!'))

bot.command('special', (ctx) => {
  return ctx.reply('Special buttons keyboard', Extra.markup((markup) => {
    return markup.resize()
      .keyboard([
        markup.contactRequestButton('Send contact'),
        markup.locationRequestButton('Send location')
      ])
  }))
})

bot.command('pyramid', (ctx) => {
  return ctx.reply('Keyboard wrap', Extra.markup(
    Markup.keyboard(['one', 'two', 'three', 'four', 'five', 'six'], {
      wrap: (btn, index, currentRow) => currentRow.length >= (index + 1) / 2
    })
  ))
})

bot.command('simple', (ctx) => {
  return ctx.replyWithHTML('<b>Coke</b> or <i>Pepsi?</i>', Extra.markup(
    Markup.keyboard(['Coke', 'Pepsi'])
  ))
})

bot.command('inline', (ctx) => {
  return ctx.reply('<b>Coke</b> or <i>Pepsi?</i>', Extra.HTML().markup((m) =>
    m.inlineKeyboard([
      m.callbackButton('Coke', 'Coke'),
      m.callbackButton('Pepsi', 'Pepsi')
    ])))
})

bot.command('random', (ctx) => {
  return ctx.reply('random example',
    Markup.inlineKeyboard([
      Markup.callbackButton('Coke', 'Coke'),
      Markup.callbackButton('Dr Pepper', 'Dr Pepper', Math.random() > 0.5),
      Markup.callbackButton('Pepsi', 'Pepsi')
    ]).extra()
  )
})

bot.command('caption', (ctx) => {
  return ctx.replyWithPhoto({ url: 'https://picsum.photos/200/300/?random' },
    Extra.load({ caption: 'Caption' })
      .markdown()
      .markup((m) =>
        m.inlineKeyboard([
          m.callbackButton('Plain', 'plain'),
          m.callbackButton('Italic', 'italic')
        ])
      )
  )
})

bot.hears(/\/wrap (\d+)/, (ctx) => {
  return ctx.reply('Keyboard wrap', Extra.markup(
    Markup.keyboard(['one', 'two', 'three', 'four', 'five', 'six'], {
      columns: parseInt(ctx.match[1])
    })
  ))
})

bot.action('Dr Pepper', (ctx, next) => {
  return ctx.reply('👍').then(() => next())
})

bot.action('plain', async (ctx) => {
  await ctx.answerCbQuery()
  await ctx.editMessageCaption('Caption', Markup.inlineKeyboard([
    Markup.callbackButton('Plain', 'plain'),
    Markup.callbackButton('Italic', 'italic')
  ]))
})

bot.action('italic', async (ctx) => {
  await ctx.answerCbQuery()
  await ctx.editMessageCaption('_Caption_', Extra.markdown().markup(Markup.inlineKeyboard([
    Markup.callbackButton('Plain', 'plain'),
    Markup.callbackButton('* Italic *', 'italic')
  ])))
})

bot.action(/.+/, (ctx) => {
  return ctx.answerCbQuery(`Oh, ${ctx.match[0]}! Great choice`)
})

////////////

bot.catch((e) => {
  console.error(e)
})

exports.handleRequest = async (req, res) => {
  try {
    await bot.handleUpdate(req.body, res)
  } catch (e) {
    console.error(e)
  }
  
  res.status(200).send()
}

package.json

{
  "dependencies": {
    "telegraf": "^3.32.0"
  }
}