Algol Plus Ltd

add_filter( 'wpo_search_product_types', function ( $types ) {
  $types[] = 'booking';
  return $types;
}, 10, 1 );

add_filter('wpo_cart_item_is_price_readonly', function ($is_readonly, $cart_item_data) {
  return isset($cart_item_data['booking']) ? true : $is_readonly;
}, 10, 2);

add_filter('wpo_cart_item_is_qty_readonly', function ($is_readonly, $cart_item_data) {
  return isset($cart_item_data['booking']) ? true : $is_readonly;
}, 10, 2);

add_filter('wpo_update_cart_cart_item_meta', function ($cart_item_meta, $item) {

  foreach ($_POST as $key => $value) {
  if (preg_match('/^wc_bookings_field_(.*)/i', $key)) {
    unset($_POST[$key]);
  }
  }

  if (isset($_POST['add-to-cart'])) {
  unset($_POST['add-to-cart']);
  }

  if ( isset($item['booking']) ) {

  $persons = array();

  if (isset($item['booking']['_persons'])) {

    if (is_array($item['booking']['_persons'])) {

    if (isset($item['booking']['_persons'][0])) {
      $persons['wc_bookings_field_persons'] = $item['booking']['_persons'][0];
    } else {
      foreach ($item['booking']['_persons'] as $i => $v) {
      $persons['wc_bookings_field_persons_' . $i] = $v;
      }
    }

    } else {
    $persons['wc_bookings_field_persons'] = $item['booking']['_persons'];
    }
  }

  $_POST = array_merge($_POST, $persons, array(
    'wc_bookings_field_start_date_month' => $item['booking']['_month'],
    'wc_bookings_field_start_date_day'   => $item['booking']['_day'],
    'wc_bookings_field_start_date_year'  => $item['booking']['_year'],
    'wc_bookings_field_duration'   => isset($item['booking']['_duration']) && $item['booking']['_duration'] > 0 ? $item['booking']['_duration'] : null,
    'wc_bookings_field_resource'   => isset($item['booking']['_resource_id']) ? $item['booking']['_resource_id'] : null,

    'wc_bookings_field_start_date_time'   => isset($item['booking']['_time']) && $item['booking']['_time'] !== '' ? date(\DateTime::ISO8601, strtotime("{$item['booking']['_year']}-{$item['booking']['_month']}-{$item['booking']['_day']} {$item['booking']['_time']}")) : null,

    'wc_bookings_field_start_date_local_timezone' => isset($item['booking']['_local_timezone']) ? $item['booking']['_local_timezone'] : null,
    'add-to-cart'                        => $item['product_id'],
  ));

  if ( isset( $item['booking']['_booking_id'] ) ) {
    wp_delete_post( $item['booking']['_booking_id'], true );
  }
  }

  return array_merge($cart_item_meta, array(
  'booking' => isset($item['booking']) ? $item['booking'] : null,
  ));
}, 10, 2);

add_filter('wpo_update_cart_loaded_product', function ($loaded_product, $item) {
  return array_merge($loaded_product, array(
  'booking'          => isset($item['booking']) ? $item['booking'] : null,
  'readonly_price'        => isset($item['booking']) ? $item['data']->get_price() : null,
  'readonly_custom_meta_fields_html'  => isset($item['booking']) ? wc_get_formatted_cart_item_data($item) : '',
  ));
}, 10, 3);

add_filter('wpo_get_item_by_product', function ($product, $cart_item_data) {
  return array_merge($product, array(
  'booking' => isset($cart_item_data['booking']) ? $cart_item_data['booking'] : null,
  ));
}, 10, 2);