wikimedia/mediawiki-extensions-Wikibase

<?php

declare( strict_types = 1 );

namespace Wikibase\Repo\Store;

use Wikibase\DataModel\Entity\ItemId;
use Wikibase\DataModel\SiteLinkList;

/**
 * A {@link SiteLinkConflictLookup} composing several others.
 * Each conflict lookup is tried in turn,
 * and as soon as one lookup returns a nonempty list of conflicts,
 * that list is returned without trying the remaining lookups.
 *
 * @license GPL-2.0-or-later
 */
class CompositeSiteLinkConflictLookup implements SiteLinkConflictLookup {

    /** @var SiteLinkConflictLookup[] */
    private $lookups;

    /** @param SiteLinkConflictLookup[] $lookups */
    public function __construct( array $lookups ) {
        $this->lookups = $lookups;
    }

    public function getConflictsForItem( ItemId $itemId, SiteLinkList $siteLinkList, int $db = null ): array {
        foreach ( $this->lookups as $lookup ) {
            $conflicts = $lookup->getConflictsForItem( $itemId, $siteLinkList, $db );
            if ( $conflicts !== [] ) {
                return $conflicts;
            }
        }

        return [];
    }

}