diff core/lib/Drupal/Core/Ajax/UpdateBuildIdCommand.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Ajax/UpdateBuildIdCommand.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,60 @@
+<?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,
+    ];
+  }
+
+}