Add ConfirmationEmailCustomizer class and confirmation email template

MAILPOET-4649

mailpoet/lib/DI/ContainerConfigurator.php

@@ -365,6 +365,7 @@ class ContainerConfigurator implements IContainerConfigurator {
     $container->autowire(\MailPoet\Subscribers\ImportExport\PersonalDataExporters\NewsletterClicksExporter::class)->setPublic(true);
     $container->autowire(\MailPoet\Subscribers\Statistics\SubscriberStatisticsRepository::class);
     $container->autowire(\MailPoet\Subscribers\SubscribersCountsController::class)->setPublic(true);
+    $container->autowire(\MailPoet\Subscribers\ConfirmationEmailCustomizer::class)->setPublic(true);
     // Segments
     $container->autowire(\MailPoet\Segments\WooCommerce::class)->setPublic(true);
     $container->autowire(\MailPoet\Segments\WP::class)->setPublic(true);

mailpoet/lib/Entities/NewsletterEntity.php

@@ -30,6 +30,7 @@ class NewsletterEntity {
   const TYPE_NOTIFICATION_HISTORY = 'notification_history';
   const TYPE_WC_TRANSACTIONAL_EMAIL = 'wc_transactional';
   const TYPE_RE_ENGAGEMENT = 're_engagement';
+  const TYPE_CONFIRMATION_EMAIL_CUSTOMIZER = 'confirmation_email';
 
   // standard newsletters
   const STATUS_DRAFT = 'draft';

mailpoet/lib/Subscribers/ConfirmationEmailCustomizer.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace MailPoet\Subscribers;
+
+use MailPoet\Config\Env;
+use MailPoet\Entities\NewsletterEntity;
+use MailPoet\Newsletter\NewslettersRepository;
+use MailPoet\Newsletter\Renderer\Renderer as NewsletterRenderer;
+use MailPoet\Settings\SettingsController;
+
+class ConfirmationEmailCustomizer {
+  const SETTING_EMAIL_ID = 'signup_confirmation.transactional_email_id';
+  const SETTING_ENABLE_EMAIL_CUSTOMIZER = 'signup_confirmation.use_mailpoet_editor';
+
+  /** @var SettingsController */
+  private $settings;
+
+
+  /** @var NewslettersRepository */
+  private $newslettersRepository;
+
+  /** @var NewsletterRenderer */
+  private $renderer;
+
+  public function __construct(
+    SettingsController $settings,
+    NewslettersRepository $newslettersRepository,
+    NewsletterRenderer $renderer
+  ) {
+    $this->settings = $settings;
+    $this->newslettersRepository = $newslettersRepository;
+    $this->renderer = $renderer;
+  }
+
+  public function init() {
+    $savedEmailId = (bool)$this->settings->get(self::SETTING_EMAIL_ID, false);
+    if (!$savedEmailId) {
+      $email = $this->createNewsletter();
+      if (is_null($email)) return;
+
+      $this->settings->set(self::SETTING_EMAIL_ID, $email->getId());
+    }
+  }
+
+  private function createNewsletter(): ?NewsletterEntity {
+    $emailTemplate = $this->fetchEmailTemplate();
+
+    if (empty($emailTemplate)) {
+      // if it's not able to fetch email template, don't bother creating newsletter
+      return null;
+    }
+
+    $newsletter = new NewsletterEntity;
+    $newsletter->setType(NewsletterEntity::TYPE_CONFIRMATION_EMAIL_CUSTOMIZER);
+    $newsletter->setSubject($this->settings->get('signup_confirmation.subject', 'Confirm your subscription'));
+    $newsletter->setBody($emailTemplate);
+    $this->newslettersRepository->persist($newsletter);
+    $this->newslettersRepository->flush();
+    return $newsletter;
+  }
+
+  private function fetchEmailTemplate() {
+    $templateUrl = Env::$libPath . '/Subscribers/ConfirmationEmailTemplate/template-confirmation.json';
+    $templateString = file_get_contents($templateUrl);
+    $templateArr = json_decode((string)$templateString, true);
+    $template = (array)$templateArr;
+    return $template['body'];
+  }
+
+  public function getNewsletter(): NewsletterEntity {
+    $savedEmailId = $this->settings->get(self::SETTING_EMAIL_ID, false);
+
+    if (empty($savedEmailId)) {
+      $this->init();
+      $savedEmailId = $this->settings->get(self::SETTING_EMAIL_ID);
+    }
+
+    $newsletter = $this->newslettersRepository->findOneById($savedEmailId);
+    if (!$newsletter) {
+      // the newsletter should always be present in the database, if it s not we shouldn't keep using this feature
+      // we need to recreate the newsletter
+      $this->settings->set(self::SETTING_EMAIL_ID, false); // reset
+      $this->init();
+      return $this->getNewsletter();
+    }
+    return $newsletter;
+  }
+
+  public function render(NewsletterEntity $newsletter): ?array {
+    $renderedContent = $this->renderer->renderAsPreview($newsletter);
+
+    if (empty($renderedContent)) {
+      return null;
+    }
+
+    $renderedContent['subject'] = $newsletter->getSubject();
+
+    return $renderedContent;
+  }
+}