Adjust the code to use our interface and abstract

Signed-off-by: Joas Schilling <coding@schilljs.com>

2 files changed, 57 insertions, 2 deletions

diff --git a/lib/public/Migration/IMigrationStep.php b/lib/public/Migration/IMigrationStep.php
index 3f95eed7598..aeb35bc8390 100644
--- a/lib/public/Migration/IMigrationStep.php
+++ b/lib/public/Migration/IMigrationStep.php
@@ -35,11 +35,12 @@ interface IMigrationStep {
 	public function preSchemaChange(IOutput $output);
 
 	/**
-	 * @param Schema $schema
+	 * @param \Closure $schema The `\Closure` returns a `Schema`
 	 * @param array $options
+	 * @return null|Schema
 	 * @since 13.0.0
 	 */
-	public function changeSchema(Schema $schema, array $options);
+	public function changeSchema(\Closure $schema, array $options);
 
 	/**
 	 * @param IOutput $output
diff --git a/lib/public/Migration/SimpleMigrationStep.php b/lib/public/Migration/SimpleMigrationStep.php
new file mode 100644
index 00000000000..681bd5c6b52
--- /dev/null
+++ b/lib/public/Migration/SimpleMigrationStep.php
@@ -0,0 +1,54 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\Migration;
+
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * @since 13.0.0
+ */
+abstract class SimpleMigrationStep implements IMigrationStep {
+
+	/**
+	 * @param IOutput $output
+	 * @since 13.0.0
+	 */
+	public function preSchemaChange(IOutput $output) {
+	}
+
+	/**
+	 * @param \Closure $schema
+	 * @param array $options
+	 * @return null|Schema
+	 * @since 13.0.0
+	 */
+	public function changeSchema(\Closure $schema, array $options) {
+		return null;
+	}
+
+	/**
+	 * @param IOutput $output
+	 * @since 13.0.0
+	 */
+	public function postSchemaChange(IOutput $output) {
+	}
+}