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Editing: Version5006Date20251015082003.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace OCA\Mail\Migration;

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

/**
 * @psalm-api
 */
class Version5006Date20251015082003 extends SimpleMigrationStep {

/**
	 * @param IOutput $output
	 * @param Closure(): ISchemaWrapper $schemaClosure
	 * @param array $options
	 * @return null|ISchemaWrapper
	 */
	#[Override]
	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
		$schema = $schemaClosure();

/**
		 * The migration "Version0161Date20190902103701" created a unique index for account_id and name without
		 * specifying a name. Unfortunately, this resulted in different index names depending on the table
		 * prefix, which means we now have to loop through the indexes to find the correct one.
		 *
		 * The index on account_id and name were supposed to be dropped in "Version3500Date20231115184458",
		 * but this did not work on every setup due to the name mismatch caused by different table prefixes.
		 *
		 * @see \OCA\Mail\Migration\Version0161Date20190902103701::changeSchema
		 * @see \OCA\Mail\Migration\Version3500Date20231115184458::changeSchema
		 * @see \OCA\Mail\Migration\Version5006Date20250927130132::changeSchema
		 */
		$mailboxesTable = $schema->getTable('mail_mailboxes');
		if (!$mailboxesTable->hasIndex('UNIQ_45754FF89B6B5FBA5E237E06')) {
			// Nothing to do
			return null;
		}

$mailboxesTable->dropIndex('UNIQ_45754FF89B6B5FBA5E237E06');

return $schema;
	}

}

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