chatgpt-calories-calculator-bot.js

const { Telegraf } = require('telegraf')
const bot = new Telegraf('TOKEN')

// Create an object to store the user's information
const userData = {}

// Set up a command to start the conversation with the user
bot.command('start', ctx => {
  // Define the userData object for the current user
  userData[ctx.from.id] = {}

  ctx.reply('Hello! I am a calorie calculator bot. To get started, please enter your age:')
})

// Listen for the user's age and store it in the userData object
bot.on('text', ctx => {
  // Check if the user has already provided their age
  if (!userData[ctx.from.id].age) {
    userData[ctx.from.id].age = ctx.message.text
    ctx.reply('Thanks! Now please enter your height in centimeters:')
  } else if (!userData[ctx.from.id].height) {
    userData[ctx.from.id].height = ctx.message.text
    ctx.reply('Thanks! Now please enter your weight in kilograms:')
  } else if (!userData[ctx.from.id].weight) {
    userData[ctx.from.id].weight = ctx.message.text
    ctx.reply('Thanks! Now please enter your gender (M or F):')
  } else {
    userData[ctx.from.id].gender = ctx.message.text

    // Calculate the daily calorie usage using the user's information
    const age = userData[ctx.from.id].age
    const height = userData[ctx.from.id].height
    const weight = userData[ctx.from.id].weight
    const gender = userData[ctx.from.id].gender

    // The formula for calculating daily calorie usage varies depending on the gender of the user
    let calorieUsage
    if (gender === 'M') {
      calorieUsage = 66 + (13.7 * weight) + (5 * height) - (6.8 * age)
    } else {
      calorieUsage = 655 + (9.6 * weight) + (1.8 * height) - (4.7 * age)
    }

    // Send the calculated calorie usage to the user
    ctx.reply(`Your daily calorie usage is ${calorieUsage}.`)
  }
})

bot.startPolling()