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<?php declare(strict_types = 1);

namespace MailPoet\Segments;

if (!defined('ABSPATH')) exit;


use MailPoet\Config\Env;
use MailPoet\Config\SubscriberChangesNotifier;
use MailPoet\Entities\SubscriberEntity;
use MailPoet\Entities\SubscriberSegmentEntity;
use MailPoet\Services\Validator;
use MailPoet\Settings\SettingsController;
use MailPoet\Subscribers\Source;
use MailPoet\Subscribers\SubscriberSaveController;
use MailPoet\Subscribers\SubscriberSegmentRepository;
use MailPoet\Subscribers\SubscribersRepository;
use MailPoet\WooCommerce\Helper as WCHelper;
use MailPoet\WooCommerce\Subscription;
use MailPoet\WP\Functions as WPFunctions;
use MailPoetVendor\Carbon\Carbon;
use MailPoetVendor\Doctrine\DBAL\Connection;
use MailPoetVendor\Doctrine\ORM\EntityManager;

class WooCommerce {
  /** @var SettingsController */
  private $settings;

  /** @var WPFunctions */
  private $wp;

  /** @var WP */
  private $wpSegment;

  /** @var string|null */
  private $mailpoetEmailCollation;

  /** @var string|null */
  private $wpPostmetaValueCollation;

  /** @var SubscribersRepository */
  private $subscribersRepository;

  /** @var SegmentsRepository */
  private $segmentsRepository;

  /** @var SubscriberSegmentRepository */
  private $subscriberSegmentRepository;

  /** @var SubscriberSaveController */
  private $subscriberSaveController;

  /** @var WCHelper */
  private $woocommerceHelper;

  /** @var EntityManager */
  private $entityManager;

  /** @var Connection */
  private $connection;

  /** @var SubscriberChangesNotifier */
  private $subscriberChangesNotifier;

  /** @var Validator */
  private $validator;

  public function __construct(
    SettingsController $settings,
    WPFunctions $wp,
    WCHelper $woocommerceHelper,
    SubscribersRepository $subscribersRepository,
    SegmentsRepository $segmentsRepository,
    SubscriberSegmentRepository $subscriberSegmentRepository,
    SubscriberSaveController $subscriberSaveController,
    WP $wpSegment,
    EntityManager $entityManager,
    Connection $connection,
    SubscriberChangesNotifier $subscriberChangesNotifier,
    Validator $validator
  ) {
    $this->settings = $settings;
    $this->wp = $wp;
    $this->wpSegment = $wpSegment;
    $this->subscribersRepository = $subscribersRepository;
    $this->segmentsRepository = $segmentsRepository;
    $this->subscriberSegmentRepository = $subscriberSegmentRepository;
    $this->subscriberSaveController = $subscriberSaveController;
    $this->woocommerceHelper = $woocommerceHelper;
    $this->entityManager = $entityManager;
    $this->connection = $connection;
    $this->subscriberChangesNotifier = $subscriberChangesNotifier;
    $this->validator = $validator;
  }

  public function shouldShowWooCommerceSegment(): bool {
    $isWoocommerceActive = $this->woocommerceHelper->isWooCommerceActive();
    $woocommerceUserExists = $this->subscribersRepository->woocommerceUserExists();

    if (!$isWoocommerceActive && !$woocommerceUserExists) {
      return false;
    }
    return true;
  }

  public function synchronizeRegisteredCustomer(int $wpUserId, ?string $currentFilter = null): bool {
    $wcSegment = $this->segmentsRepository->getWooCommerceSegment();

    $currentFilter = $currentFilter ?: $this->wp->currentFilter();
    switch ($currentFilter) {
      case 'woocommerce_delete_customer':
        // subscriber should be already deleted in WP users sync
        $this->unsubscribeUsersFromSegment(); // remove leftover association
        break;
      case 'woocommerce_new_customer':
      case 'woocommerce_created_customer':
        $newCustomer = true;
      case 'woocommerce_update_customer':
      default:
        $wpUser = $this->wp->getUserdata($wpUserId);
        $subscriber = $this->subscribersRepository->findOneBy(['wpUserId' => $wpUserId]);

        if ($wpUser === false || $subscriber === null) {
          // registered customers should exist as WP users and WP segment subscribers
          return false;
        }

        $data = [
          'is_woocommerce_user' => 1,
        ];
        if (!empty($newCustomer)) {
          $data['source'] = Source::WOOCOMMERCE_USER;
        }
        $data['id'] = $subscriber->getId();
        if ($wpUser->first_name) { // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
          $data['first_name'] = $wpUser->first_name; // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
        }
        if ($wpUser->last_name) { // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
          $data['last_name'] = $wpUser->last_name; // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
        }
        $subscriber = $this->subscriberSaveController->createOrUpdate($data, $subscriber);
        // add subscriber to the WooCommerce Customers segment when relation doesn't exist
        $subscriberSegment = $this->subscriberSegmentRepository->findOneBy(['subscriber' => $subscriber, 'segment' => $wcSegment]);

        if (!$subscriberSegment && $this->shouldSubscribeToWooSegment()) {
          $this->subscriberSegmentRepository->subscribeToSegments(
            $subscriber,
            [$wcSegment]
          );
        }
        break;
    }

    return true;
  }

  /**
   * Should subscribe to the Woo segment when creating a new woo customer and not on checkout
   * or when on checkout and MailPoet subscribe optin is enabled and checked.
   */
  protected function shouldSubscribeToWooSegment(): bool {
    $checkoutOptinEnabled = (bool)$this->settings->get(Subscription::OPTIN_ENABLED_SETTING_NAME);
    $checkoutOptinChecked = !empty($_POST[Subscription::CHECKOUT_OPTIN_INPUT_NAME]);

    return !$this->woocommerceHelper->isCheckoutRequest() || ($checkoutOptinEnabled && $checkoutOptinChecked);
  }

  public function synchronizeGuestCustomer(int $orderId): void {
    $wcOrder = $this->woocommerceHelper->wcGetOrder($orderId);

    if (!$wcOrder instanceof \WC_Order) return;
    $signupConfirmation = $this->settings->get('signup_confirmation');
    $status = SubscriberEntity::STATUS_UNCONFIRMED;
    if ((bool)$signupConfirmation['enabled'] === false) {
      $status = SubscriberEntity::STATUS_SUBSCRIBED;
    }

    $email = $this->insertSubscriberFromOrder($wcOrder, $status);

    if (empty($email)) {
      return;
    }
    $subscriber = $this->subscribersRepository->findOneBy(['email' => $email]);

    if ($subscriber) {
      $firstName = $wcOrder->get_billing_first_name(); // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
      $lastName = $wcOrder->get_billing_last_name(); // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
      if ($firstName) {
        $subscriber->setFirstName($firstName);
      }
      if ($lastName) {
        $subscriber->setLastName($lastName);
      }
      if ($firstName || $lastName) {
        $this->subscribersRepository->flush();
      }
    }
  }

  public function synchronizeCustomers(int $lastCheckedOrderId = 0, ?int $highestOrderId = null, int $batchSize = 1000): int {

    $this->wpSegment->synchronizeUsers(); // synchronize registered users

    $this->markRegisteredCustomers();

    $processedOrders = $this->insertSubscribersFromOrders($lastCheckedOrderId, $batchSize);
    $this->updateNames($processedOrders);

    $lastCheckedOrderId = $lastCheckedOrderId + $batchSize;
    if (!$highestOrderId || $lastCheckedOrderId >= $highestOrderId) {
      $this->insertUsersToSegment();
      $this->unsubscribeUsersFromSegment();
      $this->removeOrphanedSubscribers();
      $this->updateStatus();
      $this->updateGlobalStatus();
    }

    $this->subscribersRepository->invalidateTotalSubscribersCache();
    return $lastCheckedOrderId;
  }

  private function ensureColumnCollation(): void {
    if ($this->mailpoetEmailCollation && $this->wpPostmetaValueCollation) {
      return;
    }
    global $wpdb;
    $mailpoetEmailColumn = $wpdb->get_row(
      "SHOW FULL COLUMNS FROM " . MP_SUBSCRIBERS_TABLE . " WHERE Field = 'email'"
    );
    $this->mailpoetEmailCollation = $mailpoetEmailColumn->Collation; // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
    $wpPostmetaValueColumn = $wpdb->get_row(
      "SHOW FULL COLUMNS FROM " . $wpdb->postmeta . " WHERE Field = 'meta_value'"
    );
    $this->wpPostmetaValueCollation = $wpPostmetaValueColumn->Collation; // phpcs:ignore Squiz.NamingConventions.ValidVariableName.MemberNotCamelCaps
  }

  /**
   * In MySQL, if you have the same charset and collation in joined tables' columns it's perfect;
   * if you have different charsets, utf8 and utf8mb4, it works too; but if you have the same charset
   * with different collations, e.g. utf8mb4_unicode_ci and utf8mb4_unicode_520_ci, it will fail
   * with an 'Illegal mix of collations' error. That's why we need an optional COLLATE clause to fix this.
   */
  private function needsCollationChange(): bool {
    $this->ensureColumnCollation();
    $collation1 = (string)$this->mailpoetEmailCollation;
    $collation2 = (string)$this->wpPostmetaValueCollation;

    if ($collation1 === $collation2) {
      return false;
    }
    list($charset1) = explode('_', $collation1);
    list($charset2) = explode('_', $collation2);

    return $charset1 === $charset2;
  }

  private function markRegisteredCustomers(): void {
    // Mark WP users having a customer role as WooCommerce subscribers
    global $wpdb;
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
    $this->connection->executeQuery("
      UPDATE LOW_PRIORITY {$subscribersTable} mps
        JOIN {$wpdb->users} wu ON mps.wp_user_id = wu.id
        JOIN {$wpdb->usermeta} wpum ON wu.id = wpum.user_id AND wpum.meta_key = :capabilities
      SET is_woocommerce_user = 1, source = :source
        WHERE wpum.meta_value LIKE '%\"customer\"%'
    ", ['capabilities' => $wpdb->prefix . 'capabilities', 'source' => Source::WOOCOMMERCE_USER]);
  }

  private function insertSubscriberFromOrder(\WC_Order $wcOrder, string $status): ?string {
    $email = $wcOrder->get_billing_email();

    if (!$email || !$this->validator->validateEmail($email)) {
      return null;
    }

    $this->insertSubscribers([$email], $status);
    return $email;
  }

  /**
   * @return array<string, int>
   */
  private function insertSubscribersFromOrders(int $lastProcessedOrderId, int $batchSize): array {
    global $wpdb;

    $parameters = [
      'lowestOrderId' => $lastProcessedOrderId,
      'highestOrderId' => $lastProcessedOrderId + $batchSize,
    ];
    $parametersType = [
      'lowestOrderId' => \PDO::PARAM_INT,
      'highestOrderId' => \PDO::PARAM_INT,
    ];

    if ($this->woocommerceHelper->isWooCommerceCustomOrdersTableEnabled()) {
      $ordersTable = $this->woocommerceHelper->getOrdersTableName();
      $query = "SELECT id AS order_id, billing_email AS email
        FROM `{$ordersTable}`
        WHERE type = 'shop_order' AND billing_email != '' AND (id > :lowestOrderId AND id <= :highestOrderId)
        ORDER BY id";
    } else {
      $query = "SELECT wpp.id AS order_id, wppm.meta_value AS email
        FROM `{$wpdb->posts}` wpp
        JOIN `{$wpdb->postmeta}` wppm ON wpp.ID = wppm.post_id AND wppm.meta_key = '_billing_email' AND wppm.meta_value != ''
        WHERE wpp.post_type = 'shop_order'
        AND (wpp.ID > :lowestOrderId AND wpp.ID <= :highestOrderId)
        ORDER BY wpp.id";
    }

    $result = $this->connection->executeQuery($query, $parameters, $parametersType)->fetchAllAssociative();

    $processedOrders = [];
    foreach ($result as $item) {
      if (!$this->validator->validateEmail($item['email'])) {
        continue;
      }
      // because data in result are sorted by id, we can replace the previous order id
      $processedOrders[(string)$item['email']] = (int)$item['order_id'];
    }

    if (count($processedOrders)) {
      $this->insertSubscribers(array_keys($processedOrders));
    }

    return $processedOrders;
  }

  private function insertSubscribers(array $emails, string $status = SubscriberEntity::STATUS_SUBSCRIBED): int {
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
    $subscribersValues = [];
    $now = (Carbon::createFromTimestamp($this->wp->currentTime('timestamp')))->format('Y-m-d H:i:s');
    $source = Source::WOOCOMMERCE_USER;
    foreach ($emails as $email) {
      /** @var string $email */
      $email = $this->connection->quote($email);
      $email = strval($email);
      $subscribersValues[] = "(1, {$email}, '{$status}', '{$now}', '{$now}', '{$source}')";
    }

    // Save timestamp about changes before insert
    $this->subscriberChangesNotifier->subscribersBatchUpdate();
    // Update existing subscribers
    $this->connection->executeQuery('
      UPDATE ' . $subscribersTable . ' mps
      SET mps.is_woocommerce_user = 1
      WHERE mps.email IN (:emails)
    ', ['emails' => $emails], ['emails' => Connection::PARAM_STR_ARRAY]);

    // Save timestamp about new subscribers before insert
    $this->subscriberChangesNotifier->subscribersBatchCreate();
    // Insert new subscribers
    $this->connection->executeQuery('
      INSERT IGNORE INTO ' . $subscribersTable . ' (`is_woocommerce_user`, `email`, `status`, `created_at`, `last_subscribed_at`, `source`) VALUES
      ' . implode(',', $subscribersValues) . '
    ');

    return count($emails);
  }

  /**
   * @param array<string, int> $orders
   */
  private function updateNames(array $orders): void {
    global $wpdb;
    if (!$orders) {
      return;
    }
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();

    if ($this->woocommerceHelper->isWooCommerceCustomOrdersTableEnabled()) {
      $addressesTableName = $this->woocommerceHelper->getAddressesTableName();
      $metaData = [];
      $results = $this->connection->executeQuery(
        "
        SELECT order_id, first_name, last_name
        FROM {$addressesTableName}
        WHERE order_id IN (:orderIds) and address_type = 'billing'",
        ['orderIds' => array_values($orders)],
        ['orderIds' => Connection::PARAM_INT_ARRAY]
      )->fetchAllAssociative();

      // format data in the same format that is used when querying wp_postmeta (see below).
      foreach ($results as $result) {
        $firstNameData['post_id'] = $result['order_id'];
        $firstNameData['meta_key'] = '_billing_first_name';
        $firstNameData['meta_value'] = $result['first_name'];
        $metaData[] = $firstNameData;

        $lastNameData['post_id'] = $result['order_id'];
        $lastNameData['meta_key'] = '_billing_last_name';
        $lastNameData['meta_value'] = $result['last_name'];
        $metaData[] = $lastNameData;
      }
    } else {
      $metaKeys = [
        '_billing_first_name',
        '_billing_last_name',
      ];
      $metaData = $this->connection->executeQuery(
        "
        SELECT post_id, meta_key, meta_value
        FROM {$wpdb->postmeta}
        WHERE meta_key IN ('_billing_first_name', '_billing_last_name') AND post_id IN (:postIds)
      ",
        ['metaKeys' => $metaKeys, 'postIds' => array_values($orders)],
        ['metaKeys' => Connection::PARAM_STR_ARRAY, 'postIds' => Connection::PARAM_INT_ARRAY]
      )->fetchAllAssociative();
    }

    $subscribersData = [];
    foreach ($orders as $email => $postId) {
      $subscribersData[$postId]['email'] = $email;
    }

    foreach ($metaData as $row) {
      if (!$row['meta_value']) {
        continue;
      }
      $subscribersData[$row['post_id']][$row['meta_key']] = $row['meta_value'];
    }

    $now = (Carbon::now())->format('Y-m-d H:i:s');
    foreach ($subscribersData as $subscriber) {
      $data = [];
      $data['woocommerce_synced_at'] = $now;
      if (!empty($subscriber['_billing_first_name'])) $data['first_name'] = $subscriber['_billing_first_name'];
      if (!empty($subscriber['_billing_last_name'])) $data['last_name'] = $subscriber['_billing_last_name'];
      $this->connection->update($subscribersTable, $data, ['email' => $subscriber['email']]);
    }
  }

  private function insertUsersToSegment(): void {
    $wcSegment = $this->segmentsRepository->getWooCommerceSegment();
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
    $subscriberSegmentsTable = $this->entityManager->getClassMetadata(SubscriberSegmentEntity::class)->getTableName();
    // Subscribe WC users to segment
    $this->connection->executeQuery(
      "
      INSERT IGNORE INTO {$subscriberSegmentsTable} (subscriber_id, segment_id, created_at)
      SELECT id, :segmentId, CURRENT_TIMESTAMP()
      FROM {$subscribersTable}
      WHERE is_woocommerce_user = 1
    ",
      ['segmentId' => $wcSegment->getId()],
      ['segmentId' => \PDO::PARAM_INT]
    );
  }

  private function unsubscribeUsersFromSegment(): void {
    $wcSegment = $this->segmentsRepository->getWooCommerceSegment();
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
    $subscriberSegmentsTable = $this->entityManager->getClassMetadata(SubscriberSegmentEntity::class)->getTableName();
    // Unsubscribe non-WC or invalid users from segment
    $this->connection->executeQuery(
      "
      DELETE mpss FROM {$subscriberSegmentsTable} mpss
      LEFT JOIN {$subscribersTable} mps ON mpss.subscriber_id = mps.id
      WHERE mpss.segment_id = :segmentId AND (mps.is_woocommerce_user = 0 OR mps.email = '' OR mps.email IS NULL)
    ",
      ['segmentId' => $wcSegment->getId()],
      ['segmentId' => \PDO::PARAM_INT]
    );
  }

  private function updateGlobalStatus(): void {
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
    $subscriberSegmentsTable = $this->entityManager->getClassMetadata(SubscriberSegmentEntity::class)->getTableName();
    $wcSegment = $this->segmentsRepository->getWooCommerceSegment();
    // Set global status unsubscribed to all woocommerce users without any segment
    $this->connection->executeQuery(
      "
      UPDATE {$subscribersTable} mps
      LEFT JOIN {$subscriberSegmentsTable} mpss ON mpss.subscriber_id = mps.id
      SET mps.status = :statusUnsubscribed
      WHERE mpss.id IS NULL
        AND mps.is_woocommerce_user = 1
    ",
      ['statusUnsubscribed' => SubscriberEntity::STATUS_UNSUBSCRIBED],
      ['statusUnsubscribed' => \PDO::PARAM_STR]
    );
    // SET global status unsubscribed to all woocommerce users who have only 1 segment and it is woocommerce segment and they are not subscribed
    // You can't specify target table 'mps' for update in FROM clause
    $this->connection->executeQuery(
      "
      UPDATE {$subscribersTable} mps
      JOIN {$subscriberSegmentsTable} mpss ON mps.id = mpss.subscriber_id AND mpss.segment_id = :segmentId AND mpss.status = :statusUnsubscribed
      SET mps.status = :statusUnsubscribed
      WHERE mps.id IN (
        SELECT s.id -- get all subscribers with exactly 1 segment
        FROM (SELECT id FROM {$subscribersTable} WHERE is_woocommerce_user = 1) s
        JOIN {$subscriberSegmentsTable} ss on s.id = ss.subscriber_id
        GROUP BY s.id
        HAVING COUNT(ss.id) = 1
      )
    ",
      ['statusUnsubscribed' => SubscriberEntity::STATUS_UNSUBSCRIBED, 'segmentId' => $wcSegment->getId()],
      ['statusUnsubscribed' => \PDO::PARAM_STR, 'segmentId' => \PDO::PARAM_INT]
    );
  }

  private function removeOrphanedSubscribers(): void {
    // Remove orphaned WooCommerce segment subscribers (not having a matching WC customer email),
    // e.g. if WC orders were deleted directly from the database
    // or a customer role was revoked and a user has no orders
    global $wpdb;

    $wcSegment = $this->segmentsRepository->getWooCommerceSegment();
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
    $subscriberSegmentsTable = $this->entityManager->getClassMetadata(SubscriberSegmentEntity::class)->getTableName();

    // Unmark registered customers

    // Insert WC customer IDs to a temporary table for left join to use an index
    $tmpTableName = Env::$dbPrefix . 'tmp_wc_ids';
    // Registered users with orders
    if ($this->woocommerceHelper->isWooCommerceCustomOrdersTableEnabled()) {
      $ordersTable = $this->woocommerceHelper->getOrdersTableName();
      $registeredCustomersSubQuery = "SELECT DISTINCT customer_id AS id FROM `{$ordersTable}` WHERE type = 'shop_order'";
    } else {
      $registeredCustomersSubQuery = "SELECT DISTINCT wppm.meta_value AS id FROM {$wpdb->postmeta} wppm
        JOIN {$wpdb->posts} wpp ON wppm.post_id = wpp.ID
        AND wpp.post_type = 'shop_order'
        WHERE wppm.meta_key = '_customer_user'";
    }

    $this->connection->executeQuery("
      CREATE TEMPORARY TABLE {$tmpTableName}
        (`id` int(11) unsigned NOT NULL, UNIQUE(`id`), PRIMARY KEY (`id`)) AS
      {$registeredCustomersSubQuery}
    ");
    // Registered users with a customer role
    $this->connection->executeQuery("
      INSERT IGNORE INTO {$tmpTableName}
      SELECT DISTINCT wpum.user_id AS id FROM {$wpdb->usermeta} wpum
      WHERE wpum.meta_key = :capabilities AND wpum.meta_value LIKE '%\"customer\"%'
    ", ['capabilities' => $wpdb->prefix . 'capabilities']);

    // Unmark WC list registered users which aren't WC customers anymore
    $subQb = $this->connection->createQueryBuilder();
    $subQb->select('mps.id')
      ->from($subscribersTable, 'mps')
      ->join('mps', $subscriberSegmentsTable, 'mpss', 'mps.id = mpss.subscriber_id AND mpss.segment_id = :segmentId')
      ->leftJoin('mps', $tmpTableName, 'wctmp', 'mps.wp_user_id = wctmp.id')
      ->where('mps.is_woocommerce_user = 1')
      ->andWhere('wctmp.id IS NULL')
      ->andWhere('mps.wp_user_id IS NOT NULL');
    $qb = $this->connection->createQueryBuilder();
    $qb->update($subscribersTable)
      ->set('is_woocommerce_user', '0')
      ->where("id IN (SELECT id FROM ({$subQb->getSQL()}) AS sq) ")
      ->setParameter('segmentId', $wcSegment->getId());
    $qb->execute();

    $this->connection->executeQuery("DROP TABLE {$tmpTableName}");

    // Remove guest customers

    // Insert WC customer emails to a temporary table and ensure matching collations
    // between MailPoet and WooCommerce emails for left join to use an index
    $tmpTableName = Env::$dbPrefix . 'tmp_wc_emails';
    if ($this->needsCollationChange()) {
      $collation = "COLLATE $this->mailpoetEmailCollation";
    } else {
      $collation = "COLLATE $this->wpPostmetaValueCollation";
    }

    if ($this->woocommerceHelper->isWooCommerceCustomOrdersTableEnabled()) {
      $ordersTable = $this->woocommerceHelper->getOrdersTableName();
      $guestCustomersSubQuery = "SELECT DISTINCT billing_email AS email FROM `{$ordersTable}` WHERE type = 'shop_order'";
    } else {
      $guestCustomersSubQuery = "SELECT DISTINCT wppm.meta_value AS email FROM {$wpdb->postmeta} wppm
        JOIN {$wpdb->posts} wpp ON wppm.post_id = wpp.ID
        AND wpp.post_type = 'shop_order'
        WHERE wppm.meta_key = '_billing_email'";
    }

    $this->connection->executeQuery("
      CREATE TEMPORARY TABLE {$tmpTableName}
        (`email` varchar(150) NOT NULL, UNIQUE(`email`), PRIMARY KEY (`email`)) {$collation}
      {$guestCustomersSubQuery}
    ");

    // Remove WC list guest users which aren't WC customers anymore
    $subQb = $this->connection->createQueryBuilder();
    $subQb->select('mps.id')
      ->from($subscribersTable, 'mps')
      ->join('mps', $subscriberSegmentsTable, 'mpss', 'mps.id = mpss.subscriber_id AND mpss.segment_id = :segmentId')
      ->leftJoin('mps', $tmpTableName, 'wctmp', 'mps.email = wctmp.email')
      ->where('mps.is_woocommerce_user = 1')
      ->andWhere('wctmp.email IS NULL')
      ->andWhere('mps.wp_user_id IS NULL');
    $qb = $this->connection->createQueryBuilder();
    $qb->delete($subscribersTable)
      ->where("id IN (SELECT id FROM ({$subQb->getSQL()}) AS sq) ")
      ->setParameter('segmentId', $wcSegment->getId());
    $qb->execute();

    $this->connection->executeQuery("DROP TABLE {$tmpTableName}");
  }

  private function updateStatus(): void {
    $subscribeOldCustomers = $this->settings->get('mailpoet_subscribe_old_woocommerce_customers.enabled', false);
    if ($subscribeOldCustomers !== "1") {
      $status = SubscriberEntity::STATUS_UNSUBSCRIBED;
    } else {
      $status = SubscriberEntity::STATUS_SUBSCRIBED;
    }
    $subscribersTable = $this->entityManager->getClassMetadata(SubscriberEntity::class)->getTableName();
    $subscriberSegmentsTable = $this->entityManager->getClassMetadata(SubscriberSegmentEntity::class)->getTableName();
    $wcSegment = $this->segmentsRepository->getWooCommerceSegment();

    $this->connection->executeQuery(
      "
      UPDATE LOW_PRIORITY {$subscriberSegmentsTable} AS mpss
      JOIN {$subscribersTable} AS mps ON mpss.subscriber_id = mps.id
      SET mpss.status = :status
      WHERE
        mpss.segment_id = :segmentId
        AND mps.confirmed_at IS NULL
        AND mps.confirmed_ip IS NULL
        AND mps.is_woocommerce_user = 1
    ",
      ['status' => $status, 'segmentId' => $wcSegment->getId()],
      ['status' => \PDO::PARAM_STR, 'segmentId' => \PDO::PARAM_INT]
    );
  }
}