day 11

day11/services/MailService.js

@@ -0,0 +1,99 @@
+const nodemailer = require('nodemailer');
+
+const db = require('../models');
+
+module.exports = {
+  /** @private */
+  transport: null,
+  /** @private */
+  from: null,
+  /** @private */
+  to: null,
+  /**
+   * Nodemailer initializer
+   * @name mailService.initialize
+   * @param {{hostname: String, port: Number, username: String, password: String, from: String, to: String}} config Nodemailer configuration
+   * @returns {Void}
+   */
+  initialize: function (config) {
+    this.transport = nodemailer.createTransport({
+      host: config.hostname,
+      port: config.port,
+      auth: {
+        user: config.username,
+        pass: config.password,
+      },
+    });
+
+    this.from = config.from;
+    this.to = config.to;
+  },
+  /**
+   * Get email template from database
+   * @name mailService.template
+   * @param {String} slug email template slug
+   * @reject {Error}
+   * @returns {Promise.<{body: String, subject: String}>} email template
+   */
+  template: function (slug) {
+    return new Promise(function (resolve, reject) {
+      db.email
+        .findOne({ where: { slug } })
+        .then((response) => {
+          if (!response) {
+            return reject(`TEMPLATE_NOT_FOUND`);
+          } else resolve(response);
+        })
+        .catch((error) => {
+          reject(error);
+        });
+    });
+  },
+  /**
+   * Inject values into email template
+   * @name mailService.inject
+   * @param {{body: String, subject: String}} template email template
+   * @param {Object.<string, string>} payload template values
+   * @returns {{from: String, to: String, subject: String, text: String}}  Value injected email template
+   */
+  inject: function (template, payload) {
+    let mailBody = template.body;
+    let mailSubject = template.subject;
+
+    for (const key in payload) {
+      const value = payload[key];
+      mailBody = mailBody.replace(new RegExp('{{{' + key + '}}}', 'g'), value);
+    }
+
+    for (const key in payload) {
+      const value = payload[key];
+      mailSubject = mailSubject.replace(
+        new RegExp('{{{' + key + '}}}', 'g'),
+        value,
+      );
+    }
+
+    return {
+      from: this.from,
+      to: this.to,
+      subject: mailSubject,
+      html: mailBody,
+    };
+  },
+  /**
+   * Send email
+   * @name mailService.send
+   * @param {nodemailer.SendMailOptions} template email template
+   * @reject {Error} send mail error
+   * @returns {Promise.<nodemailer.SentMessageInfo>} send mail info
+   */
+  send: function (template) {
+    let self = this;
+    return new Promise(function (resolve, reject) {
+      self.transport
+        .sendMail(template)
+        .then((response) => resolve(response))
+        .catch((error) => reject(error));
+    });
+  },
+};