Add mail functionality into the development branch (#12)

* Added basic code for sending emails
+ Added tests for emails
+ Modified README.md to reflect changes to .env file

* [create-pull-request] push formatted files

* Added dkim

* Fixed mistake in docker-compose.yml

Co-authored-by: Stefan <[email protected]>

src/Tests/mail.test.ts

@@ -0,0 +1,17 @@
+process.env.NODE_ENV = "test";
+
+import chai, { expect } from "chai";
+import chaiaspromised from "chai-as-promised";
+import mail from "../lib/mail";
+
+chai.use(chaiaspromised);
+const should = chai.should();
+
+describe("mail", () => {
+  it("should succesfully send a email", async () => {
+    //NOTE THESE TESTS ONLY WORK WITH DEV BEING TRUE
+    const info = await mail.sendMail('"Chai Testing suite" <[email protected]>', "[email protected]", "Hello", "Test");
+    info.rejected.length.should.eq(0);
+    info.accepted.length.should.eq(1);
+  });
+});

src/lib/mail.ts

@@ -0,0 +1,50 @@
+import nodemailer from "nodemailer";
+import SMTPTransport from "nodemailer/lib/smtp-transport";
+
+let mailAccount = { user: process.env.MAILUSER + "@mail." + process.env.DOMAIN, pass: process.env.MAILPASSWORD };
+
+let transporter = nodemailer.createTransport(
+  new SMTPTransport({
+    host: "localhost",
+    port: 587,
+    secure: false,
+    auth: {
+      user: mailAccount.user,
+      pass: mailAccount.pass,
+    },
+    tls: {
+      rejectUnauthorized: false,
+      secureProtocol: "TLSv1_method",
+    },
+  })
+);
+
+if (process.env.DEV == "true") {
+  (async () => {
+    mailAccount = await nodemailer.createTestAccount();
+    if (process.env.NODE_ENV != "test") {
+      console.log(mailAccount);
+    }
+    transporter = nodemailer.createTransport({
+      host: "smtp.ethereal.email",
+      port: 587,
+      secure: false, // true for 465, false for other ports
+      auth: {
+        user: mailAccount.user, // generated ethereal user
+        pass: mailAccount.pass, // generated ethereal password
+      },
+    });
+  })();
+}
+
+const sendMail = async (from: string, to: string, subject: string, text?: string, html?: string) => {
+  return await transporter.sendMail({
+    from: from,
+    to: to,
+    subject: subject,
+    text: text,
+    html: html,
+  });
+};
+
+export default { sendMail, mailAccount };