eca-1.0.x-dev/modules/content/src/Plugin/ECA/Condition/EntityFieldIsAccessible.php

<?php

namespace Drupal\eca_content\Plugin\ECA\Condition;

use Drupal\Core\Entity\FieldableEntityInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\Context\ContextDefinition;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\eca\Attribute\EcaCondition;
use Drupal\eca\Plugin\ECA\Condition\ConditionBase;
use Drupal\eca\Plugin\ECA\PluginFormTrait;

/**
 * Plugin implementation of the ECA condition for entity field is accessible.
 */
#[EcaCondition(
  id: 'eca_entity_field_is_accessible',
  label: new TranslatableMarkup('Entity: field is accessible'),
  context_definitions: [
    'entity' => new ContextDefinition(
      data_type: 'entity',
      label: new TranslatableMarkup('Entity'),
    ),
  ],
  description: new TranslatableMarkup('Evaluates whether the current user has operational access on an entity field.'),
  version_introduced: '1.0.0',
)]
class EntityFieldIsAccessible extends ConditionBase {

  use PluginFormTrait;

  /**
   * {@inheritdoc}
   */
  public function evaluate(): bool {
    $entity = $this->getValueFromContext('entity');
    if (!($entity instanceof FieldableEntityInterface)) {
      return FALSE;
    }
    $field_name = trim((string) $this->tokenService->replaceClear($this->configuration['field_name'] ?? ''));
    if (($field_name === '') || !($entity->hasField($field_name))) {
      return FALSE;
    }
    $field_op = $this->configuration['operation'];
    if ($field_op === '_eca_token') {
      $field_op = $this->getTokenValue('operation', 'view');
    }
    $entity_op = $field_op === 'edit' ? 'update' : $field_op;
    return $this->negationCheck($entity->access($entity_op) && $entity->$field_name->access($field_op));
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration(): array {
    return [
      'field_name' => '',
      'operation' => 'view',
    ] + parent::defaultConfiguration();
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state): array {
    $form['field_name'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Field machine name'),
      '#description' => $this->t('The machine name of the field to check.'),
      '#default_value' => $this->configuration['field_name'] ?? '',
      '#required' => TRUE,
      '#weight' => -20,
    ];
    $form['operation'] = [
      '#type' => 'select',
      '#title' => $this->t('Operation'),
      '#description' => $this->t('The operation, like view, edit or delete to check accessibility.'),
      '#options' => [
        'view' => $this->t('View'),
        'edit' => $this->t('Edit'),
        'delete' => $this->t('Delete'),
      ],
      '#default_value' => $this->configuration['operation'] ?? 'view',
      '#required' => TRUE,
      '#weight' => -10,
      '#eca_token_select_option' => TRUE,
    ];
    return parent::buildConfigurationForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state): void {
    $this->configuration['field_name'] = $form_state->getValue('field_name');
    $this->configuration['operation'] = $form_state->getValue('operation');
    parent::submitConfigurationForm($form, $form_state);
  }

}