How to properly connect telegraf.js

[Manfredik]

I want to make an application with a bot for telegram, but so far I do not really understand how to properly connect telegraf.js to tsed

telegraf.js умееет работать с express.js и генерирует роуты для вебхуков

[Manfredik]

app.use(await bot.createWebhook({ domain: webhookDomain }));

Do I think it's more correct to make a service, or a module?

[Romakita]

Generally, I use custom factory to wrap a native js library to an injectable service.

import { Telegraf } from "telegraf";
import {Configuration} from "@tsed/di";

registerProvider({
  provide: Telegraf,
  deps: [Configuration],
  useFactory(configuration: Configuration) {
     return new Telegraf(configuration.get('telegraf.token'));
  }
})

then in a module:

import { Telegraf } from "telegraf";
import {Module, Inject} from "@tsed/di";
import "./services/TelegraphFactory"; // ! important to load your factory

@Module()
export class TelegrafModule {
  @Inject()
  protected telegrafClient: Telegraf;
  
  @Inject()
  protected app: PlatformApplication;
  
  @Constant('telegraf.webhook')
  private webhook: TheTypeOfWebhook; // replace by the correct typing
  
  $afterRoutesInit() { // you can choose another hook (at your preference)
     if (this.webhook) {
       this.app.use(this.telegraphClient.createWebhook(this.webhook));
     }
  }
}

Usage in server.ts:

import {Configuration} from "@tsed/di";
import "./telegraf/TelegrafModule"; // ! import to load the module and his factory

@Configuration({
   // options
   telegraf: {
      token: "token",
      webhook: {
        domain: "domain"
      }
   }
})
export class Server {

}

That all :)

See you
Romain