1 files changed, 60 insertions, 0 deletions
diff --git a/lib/public/Migration/IMigrationStep.php b/lib/public/Migration/IMigrationStep.php
new file mode 100644
index 00000000000..d738fee8e8d
--- /dev/null
+++ b/lib/public/Migration/IMigrationStep.php
@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCP\Migration;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+
+/**
+ * @since 13.0.0
+ */
+interface IMigrationStep {
+	/**
+	 * Human-readable name of the migration step
+	 *
+	 * @return string
+	 * @since 14.0.0
+	 */
+	public function name(): string;
+
+	/**
+	 * Human-readable description of the migration step
+	 *
+	 * @return string
+	 * @since 14.0.0
+	 */
+	public function description(): string;
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @psalm-param Closure():ISchemaWrapper $schemaClosure
+	 * @param array $options
+	 * @since 13.0.0
+	 */
+	public function preSchemaChange(IOutput $output, Closure $schemaClosure, array $options);
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @psalm-param Closure():ISchemaWrapper $schemaClosure
+	 * @param array $options
+	 * @return null|ISchemaWrapper
+	 * @since 13.0.0
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options);
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @psalm-param Closure():ISchemaWrapper $schemaClosure
+	 * @param array $options
+	 * @since 13.0.0
+	 */
+	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options);
+}