<?php

declare(strict_types=1);
/**
 * SPDX-FileCopyrightText: 2020 F7cloud GmbH and F7cloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
namespace OCA\GroupFolders\Migration;

use Closure;
use OCP\DB\ISchemaWrapper;
use OCP\Migration\IOutput;
use OCP\Migration\SimpleMigrationStep;

class Version802000Date20201119112624 extends SimpleMigrationStep {
	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();

		$result = $this->ensureColumnIsNullable($schema, 'group_folders', 'acl');

		// There might be a duplicate column group which was already indexed through being primary key in Version401001Date20190715092137
		$table = $schema->getTable('group_folders_manage');
		if ($table->hasIndex('groups_folder_manage_unique')) {
			$table->dropIndex('groups_folder_manage_unique');
			$result = true;
		}

		return $result ? $schema : null;
	}

	protected function ensureColumnIsNullable(ISchemaWrapper $schema, string $tableName, string $columnName): bool {
		$table = $schema->getTable($tableName);
		$column = $table->getColumn($columnName);

		if ($column->getNotnull()) {
			$column->setNotnull(false);
			return true;
		}

		return false;
	}
}