Update to Drupal 8.2.0. For more information, see https://www.drupal.org/project/drupal/releases/8.2.0

core/modules/content_moderation/src/Permissions.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Drupal\content_moderation;
+
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\content_moderation\Entity\ModerationState;
+use Drupal\content_moderation\Entity\ModerationStateTransition;
+
+/**
+ * Defines a class for dynamic permissions based on transitions.
+ */
+class Permissions {
+
+  use StringTranslationTrait;
+
+  /**
+   * Returns an array of transition permissions.
+   *
+   * @return array
+   *   The transition permissions.
+   */
+  public function transitionPermissions() {
+    // @todo https://www.drupal.org/node/2779933 write a test for this.
+    $perms = [];
+    /* @var \Drupal\content_moderation\ModerationStateInterface[] $states */
+    $states = ModerationState::loadMultiple();
+    /* @var \Drupal\content_moderation\ModerationStateTransitionInterface $transition */
+    foreach (ModerationStateTransition::loadMultiple() as $id => $transition) {
+      $perms['use ' . $id . ' transition'] = [
+        'title' => $this->t('Use the %transition_name transition', [
+          '%transition_name' => $transition->label(),
+        ]),
+        'description' => $this->t('Move content from %from state to %to state.', [
+          '%from' => $states[$transition->getFromState()]->label(),
+          '%to' => $states[$transition->getToState()]->label(),
+        ]),
+      ];
+    }
+
+    return $perms;
+  }
+
+}