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Editing: Version20000Date20201109081915.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
namespace OC\Core\Migrations;

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

class Version20000Date20201109081915 extends SimpleMigrationStep {
	/**
	 * @param IOutput $output
	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
	 * @param array $options
	 * @return null|ISchemaWrapper
	 */
	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();

$result = $this->ensureColumnIsNullable($schema, 'share', 'password_by_talk');
		$result = $this->ensureColumnIsNullable($schema, 'share', 'hide_download') || $result;
		//		$result = $this->ensureColumnIsNullable($schema, 'credentials', 'user') || $result;
		$result = $this->ensureColumnIsNullable($schema, 'authtoken', 'password_invalid') || $result;
		$result = $this->ensureColumnIsNullable($schema, 'collres_accesscache', 'access') || $result;

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;
	}
}

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