one-sentence-to-develop-a-whatsapp-chat-application.md

One sentence to develop a whatsapp chat application | Start Chat

Describe your needs in one sentence, and give you a WeChat chatbot. For example: We publish an event in the group. After the event is released, group members can send #sign up to sign up for the event; record members who have signed up for the event, and when new members sign up Respond to the successful registration and the registered list; When #Cancel is sent in the group, it will be deleted from the registration list, and the cancellation will be successful; If the member has no registration activity, the reply will remind the current member that there is no registration activity

Prompt

Below, we will use the latest version of Wchaty to develop a WhatsApp chat robot application using TS language. The following is the official provided example code： #!/usr/bin/env -S node --no-warnings --loader ts-node/esm import { Contact, Message, ScanStatus, types, WechatyBuilder, log, } from 'wechaty' import qrcodeTerminal from 'qrcode-terminal' import { FileBox } from 'file-box' function onScan(qrcode: string, status: ScanStatus) { if (status === ScanStatus.Waiting || status === ScanStatus.Timeout) { const qrcodeImageUrl = [ 'https://wechaty.js.org/qrcode/', encodeURIComponent(qrcode), ].join('') log.info('StarterBot', 'onScan: %s(%s) - %s', ScanStatus[status], status, qrcodeImageUrl) qrcodeTerminal.generate(qrcode, { small: true }) // show qrcode on console } else { log.info('StarterBot', 'onScan: %s(%s)', ScanStatus[status], status) } } function onLogin(user: Contact) { log.info('StarterBot', '%s login', user) } function onLogout(user: Contact) { log.info('StarterBot', '%s logout', user) } async function onMessage(msg: Message) { log.info('StarterBot', msg.toString()) if (msg.type() === types.Message.Video || msg.type() === types.Message.Attachment || msg.type() === types.Message.Audio) { log.info('isFile:',true) } if (msg.text() === 'ding') { await msg.say('dong') } } const bot = WechatyBuilder.build({ name: 'ding-dong-bot', puppet: 'wechaty-puppet-whatsapp', }) bot.on('scan', onScan) bot.on('login', onLogin) bot.on('logout', onLogout) bot.on('message', onMessage) bot.start() .then(() => log.info('StarterBot', 'Starter Bot Started.')) .catch(e => log.error('StarterBot', e)) Please refer to these codes to implement our requirements, and pay special attention to the method of obtaining the message type is types.Message instead of Message.Type. In the next question, I will describe the specific needs. For this question, you only need to reply "I am ready, please tell me your needs", and do not reply with any additional information. When I continue to state the requirements, I will give the sample code of ts implementation, and add the necessary Chinese comments in the code.

Conversation

ASSISTANT: I am ready, please tell me your needs. USER: Publish an event in a group

2When the event is released, group members can send #sign up to sign up for the event

3 The application records the members who have signed up for the event, and when a new member signs up, the registration is successful and the list of registered members is returned

4 When sending #cancellation in the group, delete it from the registration list, and reply that the cancellation is successful; if the member has no registration activity, the reply prompts that the current member has no registration activity ASSISTANT: To implement the above requirements, you can use the following code as a reference:

import { Contact, Message, ScanStatus, types, WechatyBuilder, log } from 'wechaty'

import qrcodeTerminal from 'qrcode-terminal'

import { FileBox } from 'file-box'



// Record of event participants

const participants = new Set<string>()



function onScan(qrcode: string, status: ScanStatus) {

  if (status === ScanStatus.Waiting || status === ScanStatus.Timeout) {

    const qrcodeImageUrl = [

      'https://wechaty.js.org/qrcode/',

      encodeURIComponent(qrcode)

    ].join('')

    log.info('StarterBot', 'onScan: %s(%s) - %s', ScanStatus[status], status, qrcodeImageUrl)

    qrcodeTerminal.generate(qrcode, { small: true }) // show qrcode on console

  } else {

    log.info('StarterBot', 'onScan: %s(%s)', ScanStatus[status], status)

  }

}



function onLogin(user: Contact) {

  log.info('StarterBot', '%s login', user)

}



function onLogout(user: Contact) {

  log.info('StarterBot', '%s logout', user)

}



async function onMessage(msg: Message) {

  log.info('StarterBot', msg.toString())



  // Check if message is in a group chat

  if (msg.room()) {

    // Check if message contains #signup hashtag

    if (msg.text().includes('#signup')) {

      const contact = await msg.from()

      participants.add(contact.id)

      await msg.say(`Registration successful! Current participants: ${Array.from(participants).join(', ')}`)

    }

    // Check if message contains #cancellation hashtag

    if (msg.text().includes('#cancellation')) {

      const contact = await msg.from()

      if (participants.has(contact.id)) {

        participants.delete(contact.id)

        await msg.say(`Cancellation successful. Current participants: ${Array.from(participants).join(', ')}`)

      } else {

        await msg.say('You have no registration activity.')

      }

    }

  }

}



const bot = WechatyBuilder.build({

  name: 'event-bot',

  puppet: 'wechaty-puppet-whatsapp',

})



bot.on('scan', onScan)

bot.on('login', onLogin)

bot.on('logout', onLogout)

bot.on('message', onMessage)



bot.start()

  .then(() => log.info('StarterBot', 'Event Bot Started.'))

  .catch(e => log.error('StarterBot', e))

Note that the above code assumes that the bot is added to a group chat where the event will take place, and that messages containing #signup or #cancellation are sent by group members. Also, we use a Set data structure to store the IDs of participants for easy adding and removing.