email template ;; mailer --- all the mail.(....) is sendgrid api

routes/surveyRoutes.js

@@ -1,7 +1,11 @@
 const mongoose = require('mongoose');
+
 const requireLogin = require('../middlewares/requireLogin');
 const requireCredits = require('../middlewares/requireCredits');
 
+const mailer = require('../services/Mailer');
+const surveyTemplate = require('../services/emailTemplate');
+
 const Survey = mongoose.model('Survey');
 
 module.exports = app => {
@@ -20,6 +24,11 @@ module.exports = app => {
       dateSent: Date.now(),
     });
 
+    // send survey email right after it gets saved
+    const mailer = new Mailer(survey, surveyTemplate(survey));
+
+
+
   });
 
 };

services/Mailer.js

@@ -0,0 +1,71 @@
+const passport = require('sendgrid');
+const helper = sendgrid.mail; // `helper` name is used thruout sendgrid documentation
+
+const keys = require('../config/keys');
+
+
+class Mailer extends helper.Mail {
+
+  // can be any obj with {subject, recipients}
+  // used with Survey db model to pull these 2 properties from it
+  constructor({subject, recipients}, content){
+    super();
+
+    this.sgAPI = sendgrid(keys.sendGridKey);
+
+    this.from_email = new helper.Email('[email protected]');
+    this.subject subject;
+    this.body = new helper.Content('text/html', content);
+    this.recipients = this.formatAddresses(recipients);
+
+    this.addContent(this.body);
+
+    this.addClickTracking();
+    this.addRecipients();
+  }
+
+  formatAddresses(recipients){
+
+    return recipients.map({email}) => {
+      return new helper.Email(email);
+    }
+  }
+
+  addClickTracking(){
+
+    const trackingSettings = new helper.TrackingSettings();
+    const clickTracking = new helper.ClickTracking(true, true);
+
+    trackingSettings.setClickTracking(clicktracking);
+    this.addTrackingSettings(trackingSettings);
+
+  }
+
+  addRecipients(){
+
+    const personalize = this.recipients.forEach(recipient => {
+
+      personalize.addTo(recipient);
+
+    });
+
+    this.addPersonalization(personalize);
+
+  }
+
+  async send(){
+
+    const request = sgAPI.emptyRequest({
+      method: 'POST',
+      path: 'v3/mail/send',
+      body: this.toJSON()
+    });
+
+    const response = await this.sgAPI.API(request);
+    return response;
+
+  }
+}
+
+
+module.exports = Mailer;

services/emailTemplate.js

@@ -0,0 +1,5 @@
+module.exports = (survey) => {
+
+  return ( "<div> Hello " + survey.body  + " </div>" ); 
+
+};