QuickEditEntityFieldAccessCheck.php

<?php

namespace Drupal\quickedit\Access;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Routing\Access\AccessInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\Entity\EntityInterface;

/**
 * Access check for in-place editing entity fields.
 */
class QuickEditEntityFieldAccessCheck implements AccessInterface, QuickEditEntityFieldAccessCheckInterface {
    
    /**
     * Checks Quick Edit access to the field.
     *
     * @param \Drupal\Core\Entity\EntityInterface $entity
     *   The entity containing the field.
     * @param string $field_name
     *   The field name.
     * @param string $langcode
     *   The langcode.
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The currently logged in account.
     *
     * @return \Drupal\Core\Access\AccessResultInterface
     *   The access result.
     *
     * @todo Use the $account argument: https://www.drupal.org/node/2266809.
     */
    public function access(EntityInterface $entity, $field_name, $langcode, AccountInterface $account) {
        if (!$this->validateRequestAttributes($entity, $field_name, $langcode)) {
            return AccessResult::forbidden();
        }
        return $this->accessEditEntityField($entity, $field_name);
    }
    
    /**
     * {@inheritdoc}
     */
    public function accessEditEntityField(EntityInterface $entity, $field_name) {
        return $entity->access('update', NULL, TRUE)
            ->andIf($entity->get($field_name)
            ->access('edit', NULL, TRUE));
    }
    
    /**
     * Validates request attributes.
     */
    protected function validateRequestAttributes(EntityInterface $entity, $field_name, $langcode) {
        // Validate the field name and language.
        if (!$field_name || !$entity->hasField($field_name)) {
            return FALSE;
        }
        if (!$langcode || !$entity->hasTranslation($langcode)) {
            return FALSE;
        }
        return TRUE;
    }

}