Add a base migration for easy updating to bigints

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

1 files changed, 66 insertions, 0 deletions

diff --git a/lib/public/Migration/BigIntMigration.php b/lib/public/Migration/BigIntMigration.php
new file mode 100644
index 00000000000..91722671860
--- /dev/null
+++ b/lib/public/Migration/BigIntMigration.php
@@ -0,0 +1,66 @@
+<?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;
+use Doctrine\DBAL\Types\Type;
+
+/**
+ * @since 13.0.0
+ */
+abstract class BigIntMigration extends SimpleMigrationStep {
+
+	/**
+	 * @return array Returns an array with the following structure
+	 * ['table1' => ['column1', 'column2'], ...]
+	 * @since 13.0.0
+	 */
+	abstract protected function getColumnsByTable();
+
+	/**
+	 * @param IOutput $output
+	 * @param \Closure $schemaClosure The `\Closure` returns a `Schema`
+	 * @param array $options
+	 * @return null|Schema
+	 * @since 13.0.0
+	 */
+	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
+		/** @var Schema $schema */
+		$schema = $schemaClosure();
+
+		$tables = $this->getColumnsByTable();
+
+		foreach ($tables as $tableName => $columns) {
+			$table = $schema->getTable($tableName);
+
+			foreach ($columns as $columnName) {
+				$column = $table->getColumn($columnName);
+				if ($column->getType()->getName() !== Type::BIGINT) {
+					$column->setType(Type::getType(Type::BIGINT));
+					$column->setOptions(['length' => 20]);
+				}
+			}
+		}
+
+		return $schema;
+	}
+}