Drupal\entity_browser\Plugin\Field\FieldWidget\EntityReferenceBrowserWidget::formElement()

Complexity

Conditions	20
Paths	192

Size

Total Lines	116
Code Lines	64

Duplication

Lines	8
Ratio	6.9 %

Importance

Changes	2
Bugs	0	Features	0

<?php
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $entity_type = $this->fieldDefinition->getFieldStorageDefinition()->getSetting('target_type');
    $entity_storage = $this->entityTypeManager->getStorage($entity_type);

    $ids = [];
    $entities = [];

    // Determine if we're submitting and if submit came from this widget.
    $is_relevant_submit = FALSE;
    if (($trigger = $form_state->getTriggeringElement())) {
      // Can be triggered by hidden target_id element or "Remove" button.
      if (end($trigger['#parents']) === 'target_id' || (end($trigger['#parents']) === 'remove_button')) {
        $is_relevant_submit = TRUE;

        // In case there are more instances of this widget on the same page we
        // need to check if submit came from this instance.
        $field_name_key = end($trigger['#parents']) === 'target_id' ? 2 : static::$deleteDepth + 1;
        $field_name_key = count($trigger['#parents']) - $field_name_key;
        $is_relevant_submit &= ($trigger['#parents'][$field_name_key] === $this->fieldDefinition->getName()) &&
          (array_slice($trigger['#parents'], 0, count($element['#field_parents'])) == $element['#field_parents']);
      }
    };

    if ($is_relevant_submit) {
      // Submit was triggered by hidden "target_id" element when entities were
      // added via entity browser.
      if (!empty($trigger['#ajax']['event']) && $trigger['#ajax']['event'] == 'entity_browser_value_updated') {

This code seems to be duplicated across your project.

        $parents = $trigger['#parents'];
      }
      // Submit was triggered by one of the "Remove" buttons. We need to walk
      // few levels up to read value of "target_id" element.
      elseif ($trigger['#type'] == 'submit' && strpos($trigger['#name'], $this->fieldDefinition->getName() . '_remove_') === 0) {
        $parents = array_merge(array_slice($trigger['#parents'], 0, -static::$deleteDepth), ['target_id']);
      }

      if (isset($parents) && $value = $form_state->getValue($parents)) {
        $ids = explode(' ', $value);
        $entities = $entity_storage->loadMultiple($ids);
      }
    }
    // IDs from a previous request might be saved in the form state.
    elseif ($form_state->has(['entity_browser_widget', $this->getFormStateKey($items)])) {
      $ids = $form_state->get(['entity_browser_widget', $this->getFormStateKey($items)]);
      $entities = $entity_storage->loadMultiple($ids);
    }
    // We are loading for for the first time so we need to load any existing
    // values that might already exist on the entity. Also, remove any leftover
    // data from removed entity references.
    else {
      foreach ($items as $item) {
        if (isset($item->target_id)) {
          $entity = $entity_storage->load($item->target_id);
          if (!empty($entity)) {
            $entities[$item->target_id] = $entity;
          }
        }
      }
      $ids = array_keys($entities);
    }
    $ids = array_filter($ids);
    // We store current entity IDs as we might need them in future requests. If
    // some other part of the form triggers an AJAX request with
    // #limit_validation_errors we won't have access to the value of the
    // target_id element and won't be able to build the form as a result of
    // that. This will cause missing submit (Remove, Edit, ...) elements, which
    // might result in unpredictable results.
    $form_state->set(['entity_browser_widget', $this->getFormStateKey($items)], $ids);

    $hidden_id = Html::getUniqueId('edit-' . $this->fieldDefinition->getName() . '-target-id');
    $details_id = Html::getUniqueId('edit-' . $this->fieldDefinition->getName());
    /** @var \Drupal\entity_browser\EntityBrowserInterface $entity_browser */
    $entity_browser = $this->entityTypeManager->getStorage('entity_browser')->load($this->getSetting('entity_browser'));

    $element += [
      '#id' => $details_id,
      '#type' => 'details',
      '#open' => !empty($ids) || $this->getSetting('open'),
      '#required' => $this->fieldDefinition->isRequired(),
      'target_id' => [
        '#type' => 'hidden',
        '#id' => $hidden_id,
        // We need to repeat ID here as it is otherwise skipped when rendering.
        '#attributes' => ['id' => $hidden_id],
        '#default_value' => $ids,
        // #ajax is officially not supported for hidden elements but if we
        // specify event manually it works.
        '#ajax' => [
          'callback' => [get_class($this), 'updateWidgetCallback'],
          'wrapper' => $details_id,
          'event' => 'entity_browser_value_updated',
        ],
      ],
    ];

    $cardinality = $this->fieldDefinition->getFieldStorageDefinition()->getCardinality();
    if ($cardinality == FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED || count($ids) < $cardinality) {
      $entity_browser_uuid = sha1(implode('-', array_merge($form['#parents'], [$this->fieldDefinition->getName(), $delta])));
      $entity_browser_display = $entity_browser->getDisplay();
      $entity_browser_display->setUuid($entity_browser_uuid);

      $element['entity_browser'] = $entity_browser_display->displayEntityBrowser($form_state, $this->getPersistentData());
      $element['#attached']['library'][] = 'entity_browser/entity_reference';
      $element['#attached']['drupalSettings']['entity_browser'] = [
        $entity_browser->getDisplay()->getUuid() => [
          'cardinality' => $cardinality,
          'selector' => '#' . $element['target_id']['#attributes']['id'],
        ],
      ];
    }

    $field_parents = $element['#field_parents'];

    $element['current'] = $this->displayCurrentSelection($details_id, $field_parents, $entities);

    return $element;
  }