Add email template and add email config file

Author: njxue

backend/user-service/config/emailConfig.js

@@ -0,0 +1,10 @@
+import dotenv from "dotenv";
+
+dotenv.config();
+
+export const emailOptions = {
+  user: process.env.SMTP_USER,
+  password: process.env.SMTP_PASSWORD,
+  smtp_host: process.env.SMTP_HOST,
+  smtp_port: Number(process.env.SMTP_PORT),
+};

backend/user-service/controller/user-controller.js

@@ -16,7 +16,9 @@ import {
 import { BadRequestError, ConflictError, NotFoundError, UnauthorisedError } from "../utils/httpErrors.js";
 import TokenService from "../services/tokenService.js";
 import { sendEmail } from "../services/emailService.js";
+import dotenv from "dotenv";
 
+dotenv.config();
 const PASSWORD_SALT = 10;
 export async function createUser(req, res, next) {
   try {
@@ -167,7 +169,7 @@ export async function forgetPassword(req, res, next) {
   try {
     const { email } = req.body;
     const resetToken = await TokenService.generateResetToken(email);
-    const resetPasswordLink = `http://localhost:3000/reset-password?token=${resetToken}`;
+    const resetPasswordLink = `${process.env.APP_URL}/reset-password?token=${resetToken}`;
     await sendEmail({
       to: email,
       subject: "Reset password",

backend/user-service/services/emailService.js

@@ -1,14 +1,12 @@
 import nodemailer from "nodemailer";
-import dotenv from "dotenv";
-
-dotenv.config();
+import { emailOptions } from "../config/emailConfig";
 
 const transporter = nodemailer.createTransport({
-  host: process.env.SMTP_HOST,
-  port: Number(process.env.SMTP_PORT),
+  host: emailOptions.smtp_host,
+  port: emailOptions.smtp_port,
   auth: {
-    user: process.env.SMTP_USER,
-    pass: process.env.SMTP_PASSWORD,
+    user: emailOptions.user,
+    pass: emailOptions.password,
   },
 });
 
@@ -21,9 +19,9 @@ transporter.verify(function (error, success) {
 });
 
 export const sendEmail = async ({ to, subject, text, html }) => {
-  const emailOptions = { from: process.env.SMTP_USER, to, subject, text, html };
+  const emailOptions = { from: emailOptions.user, to, subject, text, html };
   try {
-    const res = await transporter.sendMail(emailOptions);
+    await transporter.sendMail(emailOptions);
   } catch (err) {
     console.error(err);
     throw err;

backend/user-service/utils/resetPasswordEmailTemplate.js

@@ -0,0 +1,7 @@
+export const getResetPasswordEmailTemplate = (passwordResetLink) => `
+
+<p>Dear user,</p>
+<p>You have requested to change your password.</p>
+<p>You can click <a href=${passwordResetLink}>here</a>, which will bring you to a password reset page to 
+reset your password. The link is only valid for <b>15 minutes</b></p>
+`;