diff core/modules/content_moderation/src/StateTransitionValidation.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/content_moderation/src/StateTransitionValidation.php	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,50 @@
+<?php
+
+namespace Drupal\content_moderation;
+
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\workflows\Transition;
+
+/**
+ * Validates whether a certain state transition is allowed.
+ */
+class StateTransitionValidation implements StateTransitionValidationInterface {
+
+  /**
+   * The moderation information service.
+   *
+   * @var \Drupal\content_moderation\ModerationInformationInterface
+   */
+  protected $moderationInfo;
+
+  /**
+   * Stores the possible state transitions.
+   *
+   * @var array
+   */
+  protected $possibleTransitions = [];
+
+  /**
+   * Constructs a new StateTransitionValidation.
+   *
+   * @param \Drupal\content_moderation\ModerationInformationInterface $moderation_info
+   *   The moderation information service.
+   */
+  public function __construct(ModerationInformationInterface $moderation_info) {
+    $this->moderationInfo = $moderation_info;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getValidTransitions(ContentEntityInterface $entity, AccountInterface $user) {
+    $workflow = $this->moderationInfo->getWorkflowForEntity($entity);
+    $current_state = $entity->moderation_state->value ? $workflow->getTypePlugin()->getState($entity->moderation_state->value) : $workflow->getTypePlugin()->getInitialState($entity);
+
+    return array_filter($current_state->getTransitions(), function (Transition $transition) use ($workflow, $user) {
+      return $user->hasPermission('use ' . $workflow->id() . ' transition ' . $transition->id());
+    });
+  }
+
+}