nest-line-notify

LINE Notify module for Nest

Installation

To begin using it, we first install the required dependency.

$ npm install --save nest-line-notify

Getting started

Once the installation is complete, import the LineNotifyModule into the root AppModule and run the forRoot() static method as shown below:

import { Module } from '@nestjs/common';
import { LineNotifyModule } from 'nest-line-notify';

@Module({
  imports: [
    LineNotifyModule.forRoot({
      accessToken: 'LINE_NOTIFY_ACCESS_TOKEN',
    }),
  ],
})
export class AppModule {}

Next, inject the LineNotify instance using the @InjectLineNotify() decorator.

import { Injectable } from '@nestjs/common';
import { InjectLineNotify, LineNotify } from 'nest-line-notify';

@Injectable()
export class AppService {
  constructor(@InjectLineNotify() private readonly lineNotify: LineNotify) {}

  async sendNotification() {
    await this.lineNotify.send({ message: 'Hello, LINE Notify!' });
  }
}

Authentication

The module supports LINE Notify's authentication. To request an access token, import the LineNotifyModule with clientID, clientSecret, and callbackURL options.

import { Module } from '@nestjs/common';
import { LineNotifyModule } from 'nest-line-notify';

@Module({
  imports: [
    LineNotifyModule.forRoot({
      clientID: 'LINE_NOTIFY_CLIENT_ID',
      clientSecret: 'LINE_NOTIFY_CLIENT_SECRET',
      callbackURL: 'http://localhost:3000/callback';
    }),
  ],
})
export class AppModule {}

Next, add an endpoint with the @LineNotifyAuthenticate() decorator for authentication and a callback endpoint with the @LineNotifyCallback() decorator in your controller.

For callback endpoint, you can use the @LineNotifyAccessToken() decorator to retrieve the issued access token.

import { Controller, Get, Redirect } from '@nestjs/common';
import { LineNotifyAuthenticate, LineNotifyCallback, LineNotifyAccessToken } from 'nest-line-notify';
import { AppService } from './app.service';

@Controller()
export class AppController {
  constructor(private readonly appService: AppService) {}

  @Get('/authenticate')
  @LineNotifyAuthenticate()
  lineNotify() {}

  @Get('/callback')
  @LineNotifyCallback()
  @Redirect('/')
  callback(@LineNotifyAccessToken() accessToken: string) {
    console.log('Access Token:', accessToken);
  }

  @Get()
  getHello(): string {
    return this.appService.getHello();
  }
}

Async configuration

When you need to pass module options asynchronously instead of statically, use the forRootAsync() method. As with most dynamic modules, Nest provides several techniques to deal with async configuration.

One technique is to use a factory function:

LineNotifyModule.forRootAsync({
  useFactory: () => ({
    accessToken: 'LINE_NOTIFY_ACCESS_TOKEN',
  }),
});

Like other factory providers, our factory function can be async and can inject dependencies through inject.

LineNotifyModule.forRootAsync({
  imports: [ConfigModule],
  useFactory: async (configService: ConfigService) => ({
    accessToken: configService.get('LINE_NOTIFY_ACCESS_TOKEN'),
  }),
  inject: [ConfigService],
});

Alternatively, you can configure the LineNotifyModule using a class instead of a factory, as shown below.

LineNotifyModule.forRootAsync({
  useClass: LineNotifyConfigService,
});

The construction above instantiates LineNotifyConfigService inside LineNotifyModule, using it to create an options object. Note that in this example, the LineNotifyConfigService has to implement LineNotifyModuleOptionsFactory interface as shown below. The LineNotifyModule will call the createLineNotifyOptions() method on the instantiated object of the supplied class.

@Injectable()
class LineNotifyConfigService implements LineNotifyModuleOptionsFactory {
  createLineNotifyOptions(): LineNotifyModuleOptions {
    return {
      accessToken: 'LINE_NOTIFY_ACCESS_TOKEN',
    };
  }
}

If you want to reuse an existing options provider instead of creating a private copy inside the LineNotifyModule, use the useExisting syntax.

LineNotifyModule.forRootAsync({
  imports: [ConfigModule],
  useExisting: LineNotifyConfigService,
});

Reference

LINE Notify

License

MIT