1 files changed, 26 insertions, 0 deletions
diff --git a/lib/public/UserMigration/ISizeEstimationMigrator.php b/lib/public/UserMigration/ISizeEstimationMigrator.php
new file mode 100644
index 00000000000..2d1f3466f2c
--- /dev/null
+++ b/lib/public/UserMigration/ISizeEstimationMigrator.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\UserMigration;
+
+use OCP\IUser;
+
+/**
+ * @since 25.0.0
+ */
+interface ISizeEstimationMigrator {
+	/**
+	 * Returns an estimate of the exported data size in KiB.
+	 * Should be fast, favor performance over accuracy.
+	 *
+	 * @since 25.0.0
+	 * @since 27.0.0 return value may overflow from int to float
+	 */
+	public function getEstimatedExportSize(IUser $user): int|float;
+}