๐ฅ Control flow middleware for Telegraf
$ npm install telegraf-flow
const Telegraf = require('telegraf')
const TelegrafFlow = require('telegraf-flow')
const { Scene } = TelegrafFlow
const flow = new TelegrafFlow()
// Global commands
flow.command('greeter', (ctx) => ctx.flow.enter('greeter'))
flow.command('echo', (ctx) => ctx.flow.enter('echo'))
// Greeter scene
const greeterScene = new Scene('greeter')
greeterScene.enter((ctx) => ctx.reply('Hi'))
greeterScene.on('text', (ctx) => {
if (ctx.message.text.toLowerCase() === 'hi') {
ctx.flow.leave()
return ctx.reply('Buy')
}
return ctx.reply('Hi again')
})
// Echo scene
const echoScene = new Scene('echo')
echoScene.enter((ctx) => ctx.reply('echo scene'))
echoScene.command('back', (ctx) => {
ctx.flow.leave()
return ctx.reply('Okay')
})
echoScene.on('text', (ctx) => ctx.reply(ctx.message.text))
echoScene.on('message', (ctx) => ctx.reply('Only text messages please'))
// Scene registration
flow.register(greeterScene)
flow.register(echoScene)
const app = new Telegraf(process.env.BOT_TOKEN)
app.use(Telegraf.memorySession())
app.use(flow.middleware())
app.startPolling()
Telegraf user context props and functions:
app.on((ctx) => {
ctx.flow.state // Current scene state
ctx.flow.enter(sceneId, [defaultState, silent]) // Enter scene
ctx.flow.leave() // Leave scene
});