Add meta when sending new subscriber notifications

[MAILPOET-2333]

lib/Mailer/MetaInfo.php

@@ -24,6 +24,10 @@ class MetaInfo {
     return $this->makeMetaInfo('confirmation', $subscriber->status, $subscriber->source);
   }
 
+  function getNewSubscriberNotificationMetaInfo() {
+    return $this->makeMetaInfo('new_subscriber_notification', 'unknown', 'administrator');
+  }
+
   private function makeMetaInfo($email_type,  $subscriber_status, $subscriber_source) {
     return [
       'email_type' => $email_type,

lib/Subscribers/NewSubscriberNotificationMailer.php

@@ -3,6 +3,7 @@ namespace MailPoet\Subscribers;
 
 use MailPoet\Config\Renderer;
 use MailPoet\Mailer\Mailer;
+use MailPoet\Mailer\MetaInfo;
 use MailPoet\Models\Segment;
 use MailPoet\Models\Subscriber;
 use MailPoet\Settings\SettingsController;
@@ -21,6 +22,9 @@ class NewSubscriberNotificationMailer {
   /** @var SettingsController */
   private $settings;
 
+  /** @var MetaInfo */
+  private $mailerMetaInfo;
+
   /**
    * @param \MailPoet\Mailer\Mailer|null $mailer
    * @param Renderer|null $renderer
@@ -35,6 +39,7 @@ class NewSubscriberNotificationMailer {
     }
     $this->mailer = $mailer;
     $this->settings = new SettingsController();
+    $this->mailerMetaInfo = new MetaInfo();
   }
 
   /**
@@ -49,7 +54,10 @@ class NewSubscriberNotificationMailer {
       return;
     }
     try {
-      $this->getMailer()->send($this->constructNewsletter($subscriber, $segments), $settings['address']);
+      $extra_params = [
+        'meta' => $this->mailerMetaInfo->getNewSubscriberNotificationMetaInfo(),
+      ];
+      $this->getMailer()->send($this->constructNewsletter($subscriber, $segments), $settings['address'], $extra_params);
     } catch (\Exception $e) {
       if (WP_DEBUG) {
         throw $e;

tests/integration/Mailer/MetaInfoTest.php

@@ -59,6 +59,14 @@ class MetaInfoTest extends \MailPoetTest {
     ]);
   }
 
+  function testItGetsMetaInfoForNewSubscriberNotifications() {
+    expect($this->meta->getNewSubscriberNotificationMetaInfo())->equals([
+      'email_type' => 'new_subscriber_notification',
+      'subscriber_status' => 'unknown',
+      'subscriber_source' => 'administrator',
+    ]);
+  }
+
   function _after() {
     Subscriber::deleteMany();
   }

tests/integration/Subscribers/NewSubscriberNotificationMailerTest.php

@@ -65,7 +65,7 @@ class NewSubscriberNotificationMailerTest extends \MailPoetTest {
 
     $mailer = Stub::makeEmpty(Mailer::class, [
       'send' =>
-        Expected::once(function($newsletter, $subscriber) {
+        Expected::once(function($newsletter, $subscriber, $extra_params) {
           expect($subscriber)->equals('a@b.c');
           expect($newsletter)->hasKey('subject');
           expect($newsletter)->hasKey('body');
@@ -76,6 +76,11 @@ class NewSubscriberNotificationMailerTest extends \MailPoetTest {
           expect($newsletter['body'])->count(2);
           expect($newsletter['body']['text'])->contains('subscriber@example.com');
           expect($newsletter['body']['html'])->contains('subscriber@example.com');
+          expect($extra_params['meta'])->equals([
+            'email_type' => 'new_subscriber_notification',
+            'subscriber_status' => 'unknown',
+            'subscriber_source' => 'administrator',
+          ]);
         }),
     ], $this);