diff core/modules/workspaces/src/FormOperations.php @ 17:129ea1e6d783

Update, including to Drupal core 8.6.10

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/workspaces/src/FormOperations.php	Thu Feb 28 13:21:36 2019 +0000
@@ -0,0 +1,118 @@
+<?php
+
+namespace Drupal\workspaces;
+
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Render\Element;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+use Drupal\views\Form\ViewsExposedForm;
+use Drupal\workspaces\Form\WorkspaceFormInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Defines a class for reacting to form operations.
+ *
+ * @internal
+ */
+class FormOperations implements ContainerInjectionInterface {
+
+  /**
+   * The workspace manager service.
+   *
+   * @var \Drupal\workspaces\WorkspaceManagerInterface
+   */
+  protected $workspaceManager;
+
+  /**
+   * Constructs a new FormOperations instance.
+   *
+   * @param \Drupal\workspaces\WorkspaceManagerInterface $workspace_manager
+   *   The workspace manager service.
+   */
+  public function __construct(WorkspaceManagerInterface $workspace_manager) {
+    $this->workspaceManager = $workspace_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('workspaces.manager')
+    );
+  }
+
+  /**
+   * Alters forms to disallow editing in non-default workspaces.
+   *
+   * @param array $form
+   *   An associative array containing the structure of the form.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the form.
+   * @param string $form_id
+   *   The form ID.
+   *
+   * @see hook_form_alter()
+   */
+  public function formAlter(array &$form, FormStateInterface $form_state, $form_id) {
+    // No alterations are needed in the default workspace.
+    if ($this->workspaceManager->getActiveWorkspace()->isDefaultWorkspace()) {
+      return;
+    }
+
+    // Add an additional validation step for every form if we are in a
+    // non-default workspace.
+    $this->addWorkspaceValidation($form);
+
+    // If a form has already been marked as safe or not to submit in a
+    // non-default workspace, we don't have anything else to do.
+    if ($form_state->has('workspace_safe')) {
+      return;
+    }
+
+    // No forms are safe to submit in a non-default workspace by default, except
+    // for the whitelisted ones defined below.
+    $workspace_safe = FALSE;
+
+    // Whitelist a few forms that we know are safe to submit.
+    $form_object = $form_state->getFormObject();
+    $is_workspace_form = $form_object instanceof WorkspaceFormInterface;
+    $is_search_form = in_array($form_object->getFormId(), ['search_block_form', 'search_form'], TRUE);
+    $is_views_exposed_form = $form_object instanceof ViewsExposedForm;
+    if ($is_workspace_form || $is_search_form || $is_views_exposed_form) {
+      $workspace_safe = TRUE;
+    }
+
+    $form_state->set('workspace_safe', $workspace_safe);
+  }
+
+  /**
+   * Adds our validation handler recursively on each element of a form.
+   *
+   * @param array &$element
+   *   An associative array containing the structure of the form.
+   */
+  protected function addWorkspaceValidation(array &$element) {
+    // Recurse through all children and add our validation handler if needed.
+    foreach (Element::children($element) as $key) {
+      if (isset($element[$key]) && $element[$key]) {
+        $this->addWorkspaceValidation($element[$key]);
+      }
+    }
+
+    if (isset($element['#validate'])) {
+      $element['#validate'][] = [get_called_class(), 'validateDefaultWorkspace'];
+    }
+  }
+
+  /**
+   * Validation handler which sets a validation error for all unsupported forms.
+   */
+  public static function validateDefaultWorkspace(array &$form, FormStateInterface $form_state) {
+    if ($form_state->get('workspace_safe') !== TRUE) {
+      $form_state->setError($form, new TranslatableMarkup('This form can only be submitted in the default workspace.'));
+    }
+  }
+
+}