feature/html mails

composer.json

@@ -61,6 +61,7 @@
         "drupal/gin_login": "^1.0@RC",
         "drupal/gin_toolbar": "^1.0@beta",
         "drupal/inline_entity_form": "^1.0@RC",
+        "drupal/mailsystem": "^4.3",
         "drupal/masquerade": "^2.0@beta",
         "drupal/message": "^1.2",
         "drupal/openid_connect": "^2.0",

config/sync/core.extension.yml

@@ -34,6 +34,7 @@ module:
   language: 0
   link: 0
   locale: 0
+  mailsystem: 0
   media: 0
   media_library: 0
   menu_link_content: 0

config/sync/mailsystem.settings.yml

@@ -0,0 +1,6 @@
+theme: current
+defaults:
+  sender: os2loop_mail_notifications
+  formatter: os2loop_mail_notifications
+_core:
+  default_config_hash: IhwTepsVwtbtbcT5GzQKhCXDCRvbk3MNkWqPiuiZ10s

web/profiles/custom/os2loop/modules/os2loop_mail_notifications/src/Plugin/Mail/PhpMail.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Drupal\os2loop_mail_notifications\Plugin\Mail;
+
+use Drupal\Component\Utility\Html;
+use Drupal\Core\Mail\MailInterface;
+use Drupal\Core\Mail\Plugin\Mail\PhpMail as PhpMailBase;
+
+/**
+ * Copy of the default Drupal mail backend, using PHP's native mail() function.
+ *
+ * @Mail(
+ *   id = "os2loop_mail_notifications",
+ *   label = @Translation("Custom PHP mailer"),
+ *   description = @Translation("Sends the message as plain text, using PHP's native mail() function.")
+ * )
+ */
+class PhpMail extends PhpMailBase implements MailInterface {
+
+  /**
+   * Concatenates and wraps the email body for plain-text mails.
+   *
+   * @param array $message
+   *   A message array, as described in hook_mail_alter().
+   *
+   * @return array
+   *   The formatted $message.
+   */
+  public function format(array $message) {
+    $message['body'] = implode(PHP_EOL . PHP_EOL, $message['body']);
+    $message['body'] = nl2br($message['body']);
+    $message['body'] = Html::transformRootRelativeUrlsToAbsolute($message['body'], \Drupal::request()->getSchemeAndHttpHost());
+
+    return $message;
+  }
+
+  /**
+   * Sends an email message.
+   *
+   * @param array $message
+   *   A message array, as described in hook_mail_alter().
+   *
+   * @return bool
+   *   TRUE if the mail was successfully accepted, otherwise FALSE.
+   *
+   * @see http://php.net/manual/function.mail.php
+   * @see \Drupal\Core\Mail\MailManagerInterface::mail()
+   */
+  public function mail(array $message) {
+    $message['headers']['Content-Type'] = 'text/html; charset=UTF-8;';
+    return parent::mail($message);
+  }
+
+}