@trxn/nestjs-mailer

MailerModule

This module provides a MailerService that can be used to send emails.

Installation

npm i --save @trxn/nestjs-mailer @trxn/nestjs-mailjet

Quick Start

First configure the mailjet module, the documentation can be found here.

Then, import the MailerModule in your root application module:

import { Module } from '@nestjs/common';
import { MailjetModule as Mailjet } from '@trxn/nestjs-mailjet';
import { MailerModule } from '@trxn/nestjs-mailer';

@Module({
  imports: [
    Mailjet.register({
      apiKey: 'YOUR_MAILER_API_KEY',
    }),
  ],
})
export class MailjetModule {}

@Module({
  imports: [
    MailerModule.register({
      imports: [MailjetModule],
      production: process.env.NODE_ENV === 'production',
    }),
  ],
})
export class MailerModule {}

@Module({
  imports: [
    MailerModule,
  ],
})
export class AppModule {}

In the example above and in order to use the mailerModule in an efficient way you must separate your declaration into multiple submodules. The MailjetModule expose internally a MAILER_CLIENT provider that is directly used inside the MailerModule. You can use the MailjetModule or another module of you choice to be able to send email with MailerModule. The other traxion module that use the emails providers will inject a MailerService that comme from the MailerModule.

Then to use the MailerService to send an email, inject it into your service or controller:

import { Controller, Get, Inject } from '@nestjs/common';
import { MailerService } from '@trxn/nestjs-mailer';

@Controller()
export class AppController {
  constructor(
    @Inject(MailerService) private readonly mailerService: MailerService,
  ) {}

  @Get()
  async sendEmail(): Promise<void> {
    const email = {
      from: 'YOUR_EMAIL_ADDRESS',
      to: 'RECIPIENT_EMAIL_ADDRESS',
      subject: 'Test email',
      text: 'This is a test email',
    };
    await this.mailerService.send(email);
  }
}

In the example above, the MailerService is injected into the AppController and used to send an email with a from address, to address, subject, and text content.

MailerModule Options

The register() and registerAsync() methods accept an options object of type MailerModuleOptions.

Property	Type	Description
production	boolean	(optional) Default to false, tell the module to really send the email when set to true

MailerService Methods

The MailjetService provides a single method for sending email:

send

send(params: SendEmailParams): Promise<any>

Sends an email using the Mailjet API.

Property	Type	Description
params	SendEmailParams	The email parameters.

The SendEmailParams interface has the following properties:

interface SendEmailParams {
  from: string;
  to: string | string[];
  subject?: string;
  html?: string;
  text?: string;
  context?: Record<string, any>;
}

Conclusion

The nestjs-mailer module provides a simple and convenient way to allow you to shadow your email provider behind a contractual interface. The other module from traxion will use the MailerModule and his MailerService to send email when needed.