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import { SmtpClient } from "https://deno.land/x/smtp/mod.ts";
/** * Mailers send HTML-rendered emails to users based on predefined * information. They fill the same role as Controllers, except instead * of handling the request/response cycle of HTTP, they render their * results to an email message. Mailers use the SMTP configuration found * in `App.config.smtp` to configure the SMTP client when sending mails, * and are capable of rendering Views (and, subsequently, Templates) just * like controllers can. */export default class Mailer {  static layout = "mailer.ejs";
  /**   * Deliver a given message using the provided args.   */  static async deliver(app, message, ...args) {    const mailer = new this(app);    const action = mailer[message].bind(mailer);
    await action(...args);  }
  constructor(app) {    this.app = app;    this.config = app.config.mail;    this.smtp = new SmtpClient();  }
  get request() {    const { hostname, protocol } = this.config;
    return { hostname, protocol };  }
  /**   * Compile the given view's template using an instance as context,   * then email the rendered HTML given the configuration.   */  async mail(message = {}, View = null, context = {}) {    const to = message.to || message.bcc;
    if (View) {      const view = new View(this, context);      const result = await view.template.render(view);      message.content = result.toString();    }
    await this.smtp.connect(this.config.smtp);    await this.smtp.send(message);    await this.smtp.close();
    this.app.log.info(`Sent mail to "${to}"`);  }}