Calculate and store campaign IDs on sending queues

[MAILPOET-5033]

mailpoet/lib/Cron/Workers/SendingQueue/SendingQueue.php

@@ -20,6 +20,7 @@ use MailPoet\Models\StatisticsNewsletters as StatisticsNewslettersModel;
 use MailPoet\Models\Subscriber as SubscriberModel;
 use MailPoet\Newsletter\NewslettersRepository;
 use MailPoet\Newsletter\Sending\ScheduledTasksRepository;
+use MailPoet\Newsletter\Sending\SendingQueuesRepository;
 use MailPoet\Segments\SegmentsRepository;
 use MailPoet\Segments\SubscribersFinder;
 use MailPoet\Subscribers\SubscribersRepository;
@@ -78,6 +79,9 @@ class SendingQueue {
   /** @var SubscribersRepository */
   private $subscribersRepository;
 
+  /** @var SendingQueuesRepository */
+  private $sendingQueueRepository;
+
   public function __construct(
     SendingErrorHandler $errorHandler,
     SendingThrottlingHandler $throttlingHandler,
@@ -92,6 +96,7 @@ class SendingQueue {
     ScheduledTasksRepository $scheduledTasksRepository,
     MailerTask $mailerTask,
     SubscribersRepository $subscribersRepository,
+    SendingQueuesRepository $sendingQueuesRepository,
     $newsletterTask = false
   ) {
     $this->errorHandler = $errorHandler;
@@ -109,6 +114,7 @@ class SendingQueue {
     $this->links = $links;
     $this->scheduledTasksRepository = $scheduledTasksRepository;
     $this->subscribersRepository = $subscribersRepository;
+    $this->sendingQueueRepository = $sendingQueuesRepository;
   }
 
   public function process($timer = false) {
@@ -160,13 +166,34 @@ class SendingQueue {
       return;
     }
 
+    $campaignId = null;
+
+    $afterPreProcessFilter = function(array $renderedNewsletters, NewsletterEntity $renderedNewsletterEntity) use ($newsletterEntity, &$campaignId) {
+      if ($newsletterEntity !== $renderedNewsletterEntity || !isset($renderedNewsletters['text'])) {
+        return;
+      }
+      $textVersion = $renderedNewsletters['text'];
+      $campaignId = $this->calculateCampaignId($newsletterEntity, $textVersion);
+      return $renderedNewsletters;
+    };
+
+    // This filter fires during preProcessNewsletter, after some initial rendering but before any shortcodes are replaced.
+    $this->wp->addFilter('mailpoet_sending_newsletter_render_after_pre_process', $afterPreProcessFilter, 10, 2);
+
     // pre-process newsletter (render, replace shortcodes/links, etc.)
     $newsletterEntity = $this->newsletterTask->preProcessNewsletter($newsletterEntity, $queue);
+
+    $this->wp->removeFilter('mailpoet_sending_newsletter_render_after_pre_process', $afterPreProcessFilter);
+
     if (!$newsletterEntity) {
       $this->deleteTask($queue);
       return;
     }
 
+    if ($campaignId) {
+      $this->sendingQueueRepository->addCampaignId($queue->getSendingQueueEntity(), $campaignId);
+    }
+
     $newsletter = Newsletter::findOne($newsletterEntity->getId());
     if (!$newsletter) {
       return;
@@ -389,6 +416,10 @@ class SendingQueue {
     );
   }
 
+  public function calculateCampaignId(NewsletterEntity $newsletter, string $textBody): string {
+    return substr(md5(implode('|', [$newsletter->getId(), $textBody, $newsletter->getSubject()])), 0, 16);
+  }
+
   /**
    * Checks whether some of segments was deleted or trashed
    * @param int[] $segmentIds