Telegraf pagination bot example

pagination-bot.js

/*
  Telegraf pagination bot example
  by @hypernova7

  Dependencies to install: npm i consola telegraf
 */

import consola from 'consola'
import { Telegraf, Markup, session } from 'telegraf'

const bot = new Telegraf('bot-token')
const logger = consola.withTag('pagination-bot')

// Create x amount of chunks with 10 items each
const results = chunk(Array.from({ length: 45 }).fill(0).map((_, i) => i+=1), 10)

// Create pagination buttons with choices
const makeButtons = (choiceButtons) => Markup.inlineKeyboard([
  ...choiceButtons,
  [
    Markup.button.callback('Prev', 'prev'),
    Markup.button.callback('Next', 'next')
  ]
])

// Catch Telegraf errors
bot.catch(e => logger.error(e))
bot
  .use(session())
  .use((ctx, next) => {
    ctx.session ??= {} // set session if no exists
    return next()
  })


bot.command('demo', async ctx => {
  // Set page number
  ctx.session.page = ctx.session.page || 0
  // Show first page results
  await ctx.replyWithMarkdownV2(results[ctx.session.page].map(i => `Item: *${i}*`).join('\n'), {
    ...makeButtons(chunk(results[ctx.session.page].map((_,i) => Markup.button.callback(i + 1, `prefix:${i + 1}`)), 5))
  })
}).action(/(prev|next)/, async ctx => {
  /* Handler to incremet or decrement page number, and change page */
  // Prevent errors when ctx.session.page is undefined
  if (typeof ctx.session.page === 'undefined') return ctx.answerCbQuery();
  const [, action] = ctx.match
  if (action === 'prev') {
    // prevent decrement and show alert
    if (ctx.session.page === 0) return ctx.answerCbQuery('You are on home page');
    ctx.session.page = ctx.session.page - 1; // decrement
  }
  if (action === 'next') {
    // prevent increment and show alert
    if ((ctx.session.page + 1) === results.length) return ctx.answerCbQuery('You are on last page');
    ctx.session.page = ctx.session.page + 1 // increment
  }
  await ctx.answerCbQuery()
  // Change results
  await ctx.editMessageText(results[ctx.session.page].map(i => `Item: *${i}*`).join('\n'), {
    ...makeButtons(chunk(results[ctx.session.page].map((_,i) => Markup.button.callback(i + 1, `prefix:${i + 1}`)), 5)),
    parse_mode: 'MarkdownV2'
  })
}).action(/prefix:(\d+)/, async ctx => {
  /* Item choice handler */
  const [, choice] = ctx.match
  await ctx.answerCbQuery()
  await ctx.replyWithMarkdownV2(`You chose the item: *${results[ctx.session.page][choice - 1]}*`)
})


function chunk (arr, size) {
  return Array.from({ length: Math.ceil(arr.length / size) })
    .fill(0)
    .map(() => arr.splice(0, size));
}

bot.launch()

thanks .
I have a question : how can i impliment it in wizard scene?