contacts_events-8.x-1.x-dev/src/BookingSupervisionHelper.php

<?php

namespace Drupal\contacts_events;

use Drupal\Component\Datetime\DateTimePlus;
use Drupal\contacts_events\Entity\TicketInterface;
use Drupal\Core\Field\EntityReferenceFieldItemListInterface;

/**
 * Helper for working with child supervision for a booking.
 */
class BookingSupervisionHelper implements BookingSupervisionHelperInterface {

  /**
   * The order items field items we are working with.
   *
   * @var \Drupal\Core\Field\EntityReferenceFieldItemList
   */
  protected $orderItems;

  /**
   * The number of child/adult delegates.
   *
   * Keys are:
   * - adult: The delegates over 18 count.
   * - non_adult: The delegates not over 18 count.
   *
   * @var array
   */
  protected $delegates;

  /**
   * Construct the booking supervision helper.
   *
   * @param \Drupal\Core\Field\EntityReferenceFieldItemListInterface $items
   *   The order items field of an order.
   */
  public function __construct(EntityReferenceFieldItemListInterface $items) {
    $this->orderItems = $items;
  }

  /**
   * {@inheritdoc}
   */
  public function getAdultDelegates() : int {
    $this->calculateDelegates();
    return $this->delegates['adult'];
  }

  /**
   * {@inheritdoc}
   */
  public function getNonAdultDelegates() : int {
    $this->calculateDelegates();
    return $this->delegates['non_adult'];
  }

  /**
   * Calculate the delegate counts for the order.
   */
  protected function calculateDelegates() : void {
    if (isset($this->delegates)) {
      return;
    }

    $this->delegates = [
      'adult' => 0,
      'non_adult' => 0,
    ];

    /** @var \Drupal\commerce_order\Entity\OrderItemInterface $order_item */
    foreach ($this->orderItems->referencedEntities() as $order_item) {
      if ($order_item->bundle() != 'contacts_ticket') {
        continue;
      }

      /** @var \Drupal\contacts_events\Entity\TicketInterface $ticket */
      $ticket = $order_item->getPurchasedEntity();

      if ($ticket->getStatus() == 'cancelled') {
        continue;
      }

      // Count number of adult and non adult tickets.
      if ($this->isDelegateAdult($ticket)) {
        $this->delegates['adult']++;
      }
      else {
        $this->delegates['non_adult']++;
      }
    }
  }

  /**
   * Check the age of the delegate at the event is over 18.
   *
   * @param \Drupal\contacts_events\Entity\TicketInterface $ticket
   *   Ticket to get the date of birth from.
   *
   * @return bool
   *   Whether the delegate will be an adult.
   */
  protected function isDelegateAdult(TicketInterface $ticket) : bool {
    /** @var \Drupal\Component\Datetime\DateTimePlus|null $date_of_birth */
    $date_of_birth = $ticket->hasField('date_of_birth') ? $ticket->get('date_of_birth')->date : NULL;
    if (!$date_of_birth) {
      return TRUE;
    }

    /** @var \Drupal\Component\Datetime\DateTimePlus $event_date */
    $event_date = $ticket->getEvent()->get('date')->start_date ?: new DateTimePlus();

    // Set both times to midnight.
    $date_of_birth->setTime(0, 0, 0);
    $event_date->setTime(0, 0, 0);

    $diff = $date_of_birth->diff($event_date);
    return $diff->y >= 18;
  }

}