1 files changed, 76 insertions, 0 deletions
diff --git a/lib/public/Group/Backend/ABackend.php b/lib/public/Group/Backend/ABackend.php
new file mode 100644
index 00000000000..95af1b85d9b
--- /dev/null
+++ b/lib/public/Group/Backend/ABackend.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCP\Group\Backend;
+
+use OCP\GroupInterface;
+
+/**
+ * @since 14.0.0
+ */
+abstract class ABackend implements GroupInterface, IBatchMethodsBackend {
+	/**
+	 * @deprecated 14.0.0
+	 * @since 14.0.0
+	 *
+	 * @param int $actions The action to check for
+	 * @return bool
+	 */
+	public function implementsActions($actions): bool {
+		$implements = 0;
+
+		if ($this instanceof IAddToGroupBackend) {
+			$implements |= GroupInterface::ADD_TO_GROUP;
+		}
+		if ($this instanceof ICountUsersBackend) {
+			$implements |= GroupInterface::COUNT_USERS;
+		}
+		if ($this instanceof ICreateGroupBackend || $this instanceof ICreateNamedGroupBackend) {
+			$implements |= GroupInterface::CREATE_GROUP;
+		}
+		if ($this instanceof IDeleteGroupBackend) {
+			$implements |= GroupInterface::DELETE_GROUP;
+		}
+		if ($this instanceof IGroupDetailsBackend) {
+			$implements |= GroupInterface::GROUP_DETAILS;
+		}
+		if ($this instanceof IIsAdminBackend) {
+			$implements |= GroupInterface::IS_ADMIN;
+		}
+		if ($this instanceof IRemoveFromGroupBackend) {
+			$implements |= GroupInterface::REMOVE_FROM_GOUP;
+		}
+
+		return (bool)($actions & $implements);
+	}
+
+	/**
+	 * @since 28.0.0
+	 */
+	public function groupsExists(array $gids): array {
+		return array_values(array_filter(
+			$gids,
+			fn (string $gid): bool => $this->groupExists($gid),
+		));
+	}
+
+	/**
+	 * @since 28.0.0
+	 */
+	public function getGroupsDetails(array $gids): array {
+		if (!($this instanceof IGroupDetailsBackend || $this->implementsActions(GroupInterface::GROUP_DETAILS))) {
+			throw new \Exception('Should not have been called');
+		}
+		/** @var IGroupDetailsBackend $this */
+		$groupData = [];
+		foreach ($gids as $gid) {
+			$groupData[$gid] = $this->getGroupDetails($gid);
+		}
+		return $groupData;
+	}
+}