Add custom email for 2FA

Related #1490

src/Wallabag/UserBundle/Mailer/AuthCodeMailer.php

@@ -0,0 +1,93 @@
+<?php
+
+namespace Wallabag\UserBundle\Mailer;
+
+use Scheb\TwoFactorBundle\Model\Email\TwoFactorInterface;
+use Scheb\TwoFactorBundle\Mailer\AuthCodeMailerInterface;
+use Symfony\Component\Translation\DataCollectorTranslator;
+
+/**
+ * Custom mailer for TwoFactorBundle email.
+ * It adds a custom template to the email so user won't get a lonely authentication code but a complete email.
+ */
+class AuthCodeMailer implements AuthCodeMailerInterface
+{
+    /**
+     * SwiftMailer.
+     *
+     * @var \Swift_Mailer
+     */
+    private $mailer;
+
+    /**
+     * Translator for email content.
+     *
+     * @var DataCollectorTranslator
+     */
+    private $translator;
+
+    /**
+     * Sender email address.
+     *
+     * @var string
+     */
+    private $senderEmail;
+
+    /**
+     * Sender name.
+     *
+     * @var string
+     */
+    private $senderName;
+
+    /**
+     * Support URL to report any bugs.
+     *
+     * @var string
+     */
+    private $supportUrl;
+
+    /**
+     * Initialize the auth code mailer with the SwiftMailer object.
+     *
+     * @param \Swift_Mailer           $mailer
+     * @param DataCollectorTranslator $translator
+     * @param string                  $senderEmail
+     * @param string                  $senderName
+     * @param string                  $supportUrl
+     */
+    public function __construct(\Swift_Mailer $mailer, DataCollectorTranslator $translator, $senderEmail, $senderName, $supportUrl)
+    {
+        $this->mailer = $mailer;
+        $this->translator = $translator;
+        $this->senderEmail = $senderEmail;
+        $this->senderName = $senderName;
+        $this->supportUrl = $supportUrl;
+    }
+
+    /**
+     * Send the auth code to the user via email.
+     *
+     * @param TwoFactorInterface $user
+     */
+    public function sendAuthCode(TwoFactorInterface $user)
+    {
+        $message = new \Swift_Message();
+        $message
+            ->setTo($user->getEmail())
+            ->setFrom($this->senderEmail, $this->senderName)
+            ->setSubject($this->translator->trans('auth_code.mailer.subject', array(), 'wallabag_user'))
+            ->setBody($this->translator->trans(
+                'auth_code.mailer.body',
+                [
+                    '%user%' => $user->getName(),
+                    '%code%' => $user->getEmailAuthCode(),
+                    '%support%' => $this->supportUrl,
+                ],
+                'wallabag_user'
+            ))
+        ;
+
+        $this->mailer->send($message);
+    }
+}