Provide "delete" entity operation access check on group entities

src/EventSubscriber/OgEventSubscriber.php

@@ -91,6 +91,12 @@ public function provideDefaultOgPermissions(PermissionEventInterface $event) {
         'description' => $this->t('Edit the group entity.'),
         'default roles' => [OgRoleInterface::ADMINISTRATOR],
       ]),
+      new GroupPermission([
+        'name' => OgAccess::DELETE_GROUP_PERMISSION,
+        'title' => $this->t('Delete group'),
+        'description' => $this->t('Delete the group.'),
+        'default roles' => [OgRoleInterface::ADMINISTRATOR],
+      ]),
       new GroupPermission([
         'name' => OgAccess::ADMINISTER_GROUP_PERMISSION,
         'title' => $this->t('Administer group'),

src/OgAccess.php

@@ -29,6 +29,11 @@ class OgAccess implements OgAccessInterface {
    */
   const ADMINISTER_GROUP_PERMISSION = 'administer group';
 
+  /**
+   * Group level permission that allows the user to delete the group entity.
+   */
+  const DELETE_GROUP_PERMISSION = 'delete group';
+
   /**
    * Group level permission that allows the user to update the group entity.
    */
@@ -38,6 +43,7 @@ class OgAccess implements OgAccessInterface {
    * Maps entity operations performed on groups to group level permissions.
    */
   const OPERATION_GROUP_PERMISSION_MAPPING = [
+    'delete' => self::DELETE_GROUP_PERMISSION,
     'update' => self::UPDATE_GROUP_PERMISSION,
   ];
 

src/PermissionManagerInterface.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types = 1);
+
 namespace Drupal\og;
 
 /**
@@ -21,7 +23,7 @@ interface PermissionManagerInterface {
    * @param array $group_content_bundle_ids
    *   An array of group content bundle IDs, keyed by group content entity type
    *   ID.
-   * @param string $role_name
+   * @param string|null $role_name
    *   Optional default role name to filter the permissions on. If omitted, all
    *   permissions will be returned.
    *
@@ -33,19 +35,28 @@ public function getDefaultPermissions($group_entity_type_id, $group_bundle_id, a
   /**
    * Returns permissions that are enabled by default for the given role.
    *
-   * This returns group level permissions such as 'subscribe without approval'
-   * and 'administer group'.
+   * This returns the group level permissions that are populated by default when
+   * a new group is created. For example the 'manage members' permission is
+   * granted by default to the administrator role, and the 'subscribe'
+   * permission to the anonymous role.
+   *
+   * New default permissions can be added by creating an event listener for the
+   * PermissionEvent. The default permissions that ship with Organic Groups can
+   * be found in OgEventSubscriber::provideDefaultOgPermissions().
    *
    * @param string $group_entity_type_id
    *   The entity type ID of the group for which to return permissions.
    * @param string $group_bundle_id
    *   The bundle ID of the group for which to return permissions.
-   * @param string $role_name
+   * @param string|null $role_name
    *   Optional default role name to filter the permissions on. If omitted, all
    *   permissions will be returned.
    *
    * @return \Drupal\og\GroupPermission[]
    *   An array of permissions that are enabled by default for the given role.
+   *
+   * @see \Drupal\og\Event\PermissionEventInterface
+   * @see \Drupal\og\EventSubscriber\OgEventSubscriber::provideDefaultOgPermissions()
    */
   public function getDefaultGroupPermissions($group_entity_type_id, $group_bundle_id, $role_name = NULL);
 
@@ -55,19 +66,28 @@ public function getDefaultGroupPermissions($group_entity_type_id, $group_bundle_
    * This returns group content entity operation permissions such as 'edit own
    * article content'.
    *
+   * New default group content entity operation permissions can be added by
+   * creating an event listener for the PermissionEvent. The default group
+   * content operation permissions that ship with Organic Groups can be found in
+   * OgEventSubscriber.
+   *
    * @param string $group_entity_type_id
    *   The entity type ID of the group for which to return permissions.
    * @param string $group_bundle_id
    *   The bundle ID of the group for which to return permissions.
    * @param array $group_content_bundle_ids
    *   An array of group content bundle IDs, keyed by group content entity type
    *   ID.
-   * @param string $role_name
+   * @param string|null $role_name
    *   Optional default role name to filter the permissions on. If omitted, all
    *   permissions will be returned.
    *
    * @return \Drupal\og\GroupContentOperationPermission[]
    *   The array of permissions.
+   *
+   * @see \Drupal\og\Event\PermissionEventInterface
+   * @see \Drupal\og\EventSubscriber\OgEventSubscriber::provideDefaultNodePermissions()
+   * @see \Drupal\og\EventSubscriber\OgEventSubscriber::getDefaultEntityOperationPermissions()
    */
   public function getDefaultEntityOperationPermissions($group_entity_type_id, $group_bundle_id, array $group_content_bundle_ids, $role_name = NULL);