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- <?php
- namespace Drupal\Core\Ajax;
- /**
- * AJAX command for updating the value of a hidden form_build_id input element
- * on a form. It requires the form passed in to have keys for both the old build
- * ID in #build_id_old and the new build ID in #build_id.
- *
- * The primary use case for this Ajax command is to serve a new build ID to a
- * form served from the cache to an anonymous user, preventing one anonymous
- * user from accessing the form state of another anonymous user on Ajax enabled
- * forms.
- *
- * This command is implemented by
- * Drupal.AjaxCommands.prototype.update_build_id() defined in misc/ajax.js.
- *O
- * @ingroup ajax
- */
- class UpdateBuildIdCommand implements CommandInterface {
- /**
- * Old build id.
- *
- * @var string
- */
- protected $old;
- /**
- * New build id.
- *
- * @var string
- */
- protected $new;
- /**
- * Constructs a UpdateBuildIdCommand object.
- *
- * @param string $old
- * The old build_id.
- * @param string $new
- * The new build_id.
- */
- public function __construct($old, $new) {
- $this->old = $old;
- $this->new = $new;
- }
- /**
- * {@inheritdoc}
- */
- public function render() {
- return [
- 'command' => 'update_build_id',
- 'old' => $this->old,
- 'new' => $this->new,
- ];
- }
- }
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