First

.gitignore

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+.env
+*.env
+node_modules/*

package.json

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+{
+  "name": "mailer",
+  "version": "1.0.0",
+  "description": "E-Mailer microservice for the Talgo Cloud infrastructure.",
+  "main": "./src/index.js",
+  "repository": "github.com/talgo-cloud/Mailer",
+  "license": "MIT",
+  "private": true,
+  "dependencies": {
+    "@aws-sdk/client-ses": "^3.465.0",
+    "@aws-sdk/client-sesv2": "^3.465.0",
+    "aws-sdk": "^2.1507.0",
+    "express": "^4.18.2",
+    "max-listeners-exceeded-warning": "^0.0.1",
+    "nodemon": "^3.0.1",
+    "pug": "^3.0.2",
+    "squirrelly": "^9.0.0"
+  },
+  "type": "module",
+  "scripts": {
+    "dev": ". ./.env && node ./src/index.js"
+  }
+}

src/index.js

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+import express from 'express'
+const app = express()
+import router from './routes.js'
+import { EventEmitter } from 'events'
+EventEmitter.defaultMaxListeners = 15;
+
+
+const port = process.env.PORT || 3000
+
+// middleware
+app.use(express.json())
+app.use(express.urlencoded({extended: true}))
+
+// routes
+app.use(router);
+
+app.listen(port, () => {
+    console.log('Mailer listening at http://127.0.0.1:' + port)
+})

src/mailer.js

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+// Load the AWS SDK for Node.js
+import { SESv2Client, SendEmailCommand } from "@aws-sdk/client-sesv2"; // ES Modules import
+const client = new SESv2Client();
+
+export default function sendEmail(mailData) {
+  const input = { // SendEmailRequest
+    FromEmailAddress: mailData.from,
+    Destination: { // Destination
+      ToAddresses: [ // EmailAddressList
+        mailData.to,
+      ],
+    },
+    Content: { // EmailContent
+      Simple: { // Message
+        Subject: { // Content
+          Data: mailData.subject, // required
+          Charset: 'utf-8',
+        },
+        Body: { // Body
+          Html: {
+            Data: mailData.body, // required
+            Charset: 'utf-8',
+          },
+        },
+      },
+    },
+  };
+
+  const command = new SendEmailCommand(input);
+  return client.send(command);
+}

src/routes.js

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+import express from 'express'
+const router = new express.Router();
+import mailer from './mailer.js'
+import sqrl from 'squirrelly'
+import fs from 'fs'
+
+router.post('/email', (req, res) => {
+    console.log(req.body)
+    let emailTemplate = ''
+    let mailData = {
+        body: '',
+        to: req.body.to,
+        from: '',
+        subject: '',
+    }
+
+    console.log(req.Headers)
+
+    // property validation
+    let errList = []
+
+    if (!req.body.to) {
+        errList.push({"to": "valid email address is required"})
+    }
+    // if (!req.body.from) {
+    //     errList.push({"from": "valid email address is required"})
+    // }
+    // if (!req.body.subject) {
+    //     errList.push({"subject": "non-empty string expected"})
+    // }
+    if (!req.body.hasOwnProperty('template_type')) {
+        errList.push({"template_type": "a value must be provided, even an empty string"})
+    }
+    if (errList.length > 0) {
+        res.status(400).json({ errors: errList }).end()
+        return
+    }
+
+    switch(req.body.template_type) {
+        case 'verification_valid':
+            mailData.subject = 'Verify your Talgo Cloud email address'
+            emailTemplate = './templates/verification.html'
+            mailData.from = '"Talgo Cloud" <accounts@talgo.cc>'
+            break;
+        case 'recovery_valid':
+            mailData.subject = 'Recover your Talgo Cloud account'
+            emailTemplate = './templates/recovery.html'
+            mailData.from = '"Talgo Cloud" <accounts@talgo.cc>'
+            break;
+        default:
+            mailData.subject = req.body.subject
+            emailTemplate = './templates/default.html'
+            mailData.from = req.body.from
+            break;
+    }
+
+    mailData.body = sqrl.render(fs.readFileSync(emailTemplate).toString(), req.body)
+
+    mailer(mailData).then((data) => {
+        console.log(data)
+        res.status(200).end()
+    }).catch((err) => {
+        console.log(err)
+        res.status(500).end()
+    })
+})
+
+// {"template_type": "verification_valid", "to":"gabe@mnrva.dev", "verification_url":"https://google.com"}
+
+export default router

templates/default.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <div style="font-family: Arial, Helvetica, sans-serif; background-color: #eee; padding: 3em; max-width:550px;">
+        <div style="text-align: center;">
+            <div style="background-color: white; border-radius: 5px; font-size: 16px;">
+                <div style="height: 56px; background-color: #f41f4e; padding:0.5em; text-align: center; border-top-right-radius: 5px; border-top-left-radius: 5px;">
+                    <img src="https://i.postimg.cc/L8gd5SBt/logo-45h.png" style="padding-top: 7px;"/>
+                </div>
+                <div style="padding: 4%; overflow:auto; color: #777;">
+                    {{@foreach(it.data) => key, val}}
+                        {{key}}, {{val}}<br>
+                    {{/foreach}}
+                </div>
+            </div>
+            <p style="color: #888; font-size: 14px;">
+                &copy; 2023 Talgo Cloud LLC. All rights reserved.
+            </p>
+        </div>
+    </div>
+</body>
+</html>

templates/recovery.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <div style="font-family: Arial, Helvetica, sans-serif; background-color: #eee; padding: 3em; max-width:550px;">
+        <div style="text-align: center;">
+            <div style="background-color: white; border-radius: 5px; font-size: 16px;">
+                <div style="height: 56px; background-color: #f41f4e; padding:0.5em; text-align: center; border-top-right-radius: 5px; border-top-left-radius: 5px;">
+                    <img src="https://i.postimg.cc/L8gd5SBt/logo-45h.png" style="padding-top: 7px;"/>
+                </div>
+                <div style="padding: 4%; overflow:auto; color: #777;">
+                    <h1 style="margin: 0.5em 0em 1em 0em; font-weight: bold; color: #333">Recover your Account</h1>
+                    <p style="padding: 0px 2em;">
+                        We recieved a request to recover your Talgo Cloud account.
+                        Click the link below to enter account recovery.
+                        The link is valid for 15 minutes.
+                    </p>
+                    <a type="button" href="{{it.recovery_url}}" style="background-color: #f41f4e; border: none; border-radius: 5px; padding: 1em; color: white; font-style: bold; font-weight: bold; font-size: 16px; text-decoration: none; display: block; width: 81%; text-align: center; margin: 0em 2em;" target="_blank">
+                            Reset password
+                    </a>
+                    <div style="font-size: 14px;">
+                        <hr style="width: 10%;border:0;margin:0px auth;width:10%;height:2px;background:#ddd;">
+                        <p>
+                            Or, copy and paste this link into your browser:
+                        </p>
+                        <a style="word-wrap: break-word; color: #f41f4e" href="{{it.recovery_url}}">
+                            {{it.recovery_url}}
+                        </a>
+                        <p style="color: #aaa; font-style: italic; margin-top: 2.5em;">If you did not request this email, you can safely delete it.</p>
+                    </div>
+                    
+                </div>
+            </div>
+            <p style="color: #888; font-size: 14px;">
+                &copy; 2023 Talgo Cloud LLC. All rights reserved.
+            </p>
+        </div>
+    </div>
+</body>
+</html>

templates/verification.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <div style="font-family: Arial, Helvetica, sans-serif; background-color: #eee; padding: 3em; max-width:550px;">
+        <div style="text-align: center;">
+            <div style="background-color: white; border-radius: 5px; font-size: 16px;">
+                <div style="height: 56px; background-color: #f41f4e; padding:0.5em; text-align: center; border-top-right-radius: 5px; border-top-left-radius: 5px;">
+                    <img src="https://i.postimg.cc/L8gd5SBt/logo-45h.png" style="padding-top: 7px;"/>
+                </div>
+                <div style="padding: 4%; overflow:auto; color: #777;">
+                    <h1 style="margin: 0.2em 0em 0.5em 0em; font-weight: bold; color: #333">Welcome to Talgo</h1>
+                    <p style="padding: 0px 2em;">
+                        You're almost ready to start using Talgo to boost your
+                        app to the next level. Use the code below to verify your email address.
+                    </p>
+                    <p style="padding: 0em; color: black; font-weight: bold; font-size: 22px; text-align: center;">
+                        {{it.verification_code}}
+                    </p>
+                    <div style="font-size: 14px;">
+                        <hr style="width: 10%;border:0;margin:0px auth;width:10%;height:2px;background:#ddd;">
+                        <p style="color: #aaa; font-style: italic; margin-top: 2.5em;">If you did not request this email, you can safely delete it.</p>
+                    </div>
+                    
+                </div>
+            </div>
+            <p style="color: #888; font-size: 14px;">
+                &copy; 2023 Talgo Cloud LLC. All rights reserved.
+            </p>
+        </div>
+    </div>
+</body>
+</html>

templates/welcome.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body style="font-family: Arial, Helvetica, sans-serif; ">
+    <div style="height: 56px; background-color: #f41f4e; padding:0.5em;">
+        <!-- <h1 style="font-family: Verdana, Geneva, Tahoma, sans-serif; color: white; padding-left: 1em; padding-top: 8px; margin:0px;">talgo</h1> -->
+        <img src="../assets/logo.png" style="height: 60px; padding-left: 2em;"/>
+    </div>
+    <div style="max-width: 600px; padding-left: 2em; overflow:auto; ">
+        <h1>Welcome to Talgo!</h1>
+        <p>
+            This is the contents of a test email sent to welcome you to our
+            service. Even though there is no actually valuable information
+            here, we hope you still like the message.
+        </p>
+        <button style="background-color: #f41f4e; border: none; border-radius: 5px; padding: 1em; color: white; font-style: bold; font-weight: bold; font-size: 16px;" style:hover="">Click Me!</button>
+        <p>
+            Or if that doesn't work, copy and paste this link into your 
+            browser:
+        </p>
+        <a style="word-wrap: break-word;" href="https://gosuimg.com/accounts/verify?token=VGhpcyBpcyBhIHJlYWxseSBjb29sIHN0cmluZw.V293LCBhbm90aGVyIHN0cmluZz8/IFdlIGFyZSBlYXRpbmcgZ29vZCB0b25pZ2h0IQ.QW5kIG9uZSBmaW5hbCBzdHJpbmcu">
+            https://accounts.talgo.cc/verify?token=VGhpcyBpcyBhIHJlYWxseSBjb29sIHN0cmluZw.V293LCBhbm90aGVyIHN0cmluZz8/IFdlIGFyZSBlYXRpbmcgZ29vZCB0b25pZ2h0IQ.QW5kIG9uZSBmaW5hbCBzdHJpbmcu
+        </a>
+        <p>
+            After clicking that button, absolutely nothing will happen.
+            The only thing that happens when you click that button 
+            is the small amount of dopamine that gets sent straight into 
+            your amygdala when you click buttons. Enjoy the service!
+        </p>
+        <hr>
+        <p style="color: #888; font-size: 14px;">
+            &copy; 2023 Talgo Cloud LLC <br>
+            If you hate us and never want to talk to us again, <a href="/unsubscribe">unsubscribe</a>. <br>
+        </p>
+    </div>
+</body>
+<style>
+    button:hover {
+        cursor: pointer;
+    }
+</style>
+</html>
+
+<p style="padding: 0px 2em;">
+    You're almost ready to start using Talgo to boost your
+    app to the next level. Use the code below to verify your email address.
+</p>
+<p style="padding: 1em; color: black; font-weight: bold; font-size: 22px; text-align: center;">
+    {{it.verification_code}}
+</p>

tsconfig.json

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+{
+    "compilerOptions": {
+      "outDir": "./built",
+      "allowJs": true,
+      "target": "es5"
+    },
+    "include": ["./src/**/*"]
+}