Reminder (cron)
Issue
I need to send individual reminders every so often to users, reminding them to perform a task or complete a purchase.
Possible Solution
For this we will need to install some dependencies that will facilitate the work of the scheduled tasks, we will use node-cron below you will find the instructions on how to install install
pnpm i node-cron
pnpm i @types/node-cron -D
We have seen how we declare a logic that runs every 12 hours 0 */12 * * * cron guru where it makes a request to an api that can also be a query to the database to retrieve which are those user numbers to which we want to send a message.
It is recommended that you have a varied list of welcome messages to avoid possible bans.
app.ts
import { createBot, createProvider, createFlow, addKeyword, utils } from '@builderbot/bot'
import { schedule } from 'node-cron'
import { MemoryDB as Database } from '@builderbot/bot'
import { BaileysProvider as Provider } from '@builderbot/provider-baileys'
const PORT = process.env.PORT ?? 3008
const welcomeFlow = addKeyword<Provider, Database>(['hi', 'hello', 'hola'])
.addAnswer(`🙌 Hello welcome to this *Chatbot*`)
const main = async () => {
const adapterFlow = createFlow([welcomeFlow])
const adapterProvider = createProvider(Provider)
const adapterDB = new Database()
const { httpServer } = await createBot({
flow: adapterFlow,
provider: adapterProvider,
database: adapterDB,
})
httpServer(+PORT)
/**
* It is recommended to have an array of messages with which you will
* greet or make that first contact with the user to
* avoid robotic behavior and possible bans
*/
schedule('0 */12 * * *', async () => {
console.log('running a task twelve hours');
const usersApi = await fetch('http://your.api/users')
const users = await usersApi.json()
const listMessages = [`Your message!`, 'Ey how are you?', 'How do you doing?']
for (const user of users) {
const randomMessage = listMessages[Math.floor(Math.random() * listMessages.length)]
await adapterProvider.sendMessage(user.number, randomMessage, {})
await utils.delay(5000)
}
});
}
main()