flexiform-8.x-1.x-dev/src/Plugin/FormEnhancer/MultipleEntityForm.php

<?php

namespace Drupal\flexiform\Plugin\FormEnhancer;

use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Drupal\ctools\Form\AjaxFormTrait;
use Drupal\flexiform\FormEnhancer\ConfigurableFormEnhancerBase;

/**
 * Form enhancer for multiple entity forms.
 *
 * @FormEnhancer(
 *   id = "multiple_entities",
 *   label = @Translation("Multiple Entities"),
 * )
 */
class MultipleEntityForm extends ConfigurableFormEnhancerBase {
  use StringTranslationTrait;
  use AjaxFormTrait;

  /**
   * {@inheritdoc}
   */
  protected $supportedEvents = [
    'init_form_entity_config',
  ];

  /**
   * {@inheritdoc}
   */
  public function configurationForm(array $form, FormStateInterface $form_state) {
    // Prepare a link to add an entity to this form.
    $target_entity_type = $this->formDisplay->get('targetEntityType');
    /** @var \Drupal\Core\Entity\EntityTypeInterface $target_entity_def */
    $target_entity_def = \Drupal::service('entity_type.manager')->getDefinition($target_entity_type);
    $url_params = [
      'form_mode_name' => $this->formDisplay->get('mode'),
    ];
    if ($target_entity_def->get('bundle_entity_type')) {
      $url_params[$target_entity_def->get('bundle_entity_type')] = $this->formDisplay->get('bundle');
    }
    else if ($target_entity_def->hasKey('bundle')) {
      $url_params['bundle'] = $this->formDisplay->get('bundle');
    }

    $form['add'] = [
      '#type' => 'link',
      '#title' => $this->t('Add Entity'),
      '#url' => Url::fromRoute("entity.entity_form_display.{$target_entity_type}.form_mode.form_entity_add", $url_params),
      '#attributes' => $this->getAjaxButtonAttributes(),
      '#attached' => [
        'library' => [
          'core/drupal.ajax',
        ],
      ],
    ];
    $form['entities'] = [
      '#type' => 'table',
      '#header' => [
        $this->t('Entity'),
        $this->t('Plugin'),
        $this->t('Operations'),
      ],
      '#title' => t('Entities'),
      '#empty' => t('This form display has no entities yet.'),
    ];

    foreach ($this->formDisplay->getFormEntityManager($form_state)->getContexts() as $namespace => $context) {
      $operations = [];
      if (!empty($namespace)) {
        $operation_params = $url_params;
        $operation_params['entity_namespace'] = $namespace;

        $operations['edit'] = [
          'title' => $this->t('Edit'),
          'weight' => 10,
          'url' => Url::fromRoute(
            "entity.entity_form_display.{$target_entity_type}.form_mode.form_entity_edit",
            $operation_params
          ),
          'attributes' => $this->getAjaxButtonAttributes(),
        ];
      }

      $form['entities'][$namespace] = [
        'human_name' => [
          '#plain_text' => $context->getContextDefinition()->getLabel(),
        ],
        'plugin' => [
          '#plain_text' => $context->getFormEntity()->getLabel(),
        ],
        'operations' => [
          '#type' => 'operations',
          '#links' => $operations,
          '#attached' => [
            'library' => [
              'core/drupal.ajax',
            ],
          ],
        ],
      ];
    }

    return $form;
  }

  /**
   * Initialise the enhancer config.
   *
   * @return array
   *   The initial config for the enhancer.
   */
  public function initFormEntityConfig() {
    return !empty($this->configuration['entities']) ? $this->configuration['entities'] : [];
  }

  /**
   * Get the config for an entity namespace.
   *
   * @return array|false
   *   The entity config or FALSE if it doesn't exist.
   */
  public function getFormEntityConfig($namespace) {
    return $this->configuration['entities'][$namespace] ?? FALSE;
  }

  /**
   * Set the config for an entity namespace.
   *
   * @return $this
   *   The form enhancer.
   *
   * @todo: Rename to setFormEntityConfig()?
   */
  public function addFormEntityConfig($namespace, $configuration) {
    $this->configuration['entities'][$namespace] = $configuration;
    return $this;
  }

  /**
   * Remove an entity namespace.
   *
   * @return $this
   *   The form enhancer.
   */
  public function removeFormEntityConfig($namespace) {
    unset($this->configuration['entities'][$namespace]);
    return $this;
  }

}