FilterImpl.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\Search\Result\Filter;
 
use ILIAS\Search\Result\Filter\Criterion\Criterion;
 
class FilterImpl implements Filter
{
    public function filter(
        Criterion $criterion,
        int $offset,
        int $limit,
        int ...$raw_ids
    ): FilteredResult {
        $filtered = [];
        $is_completed = true;
        $criterion->preloadData(...$raw_ids);
        foreach ($raw_ids as $id) {
            if ($criterion->doesFulfill($id)) {
                $filtered[] = $id;
            }
            // always look for one more valid result find out whether the result is complete
            if (count($filtered) > $offset + $limit) {
                $is_completed = false;
                break;
            }
        }
        $filtered = array_slice($filtered, $offset, $limit);
        return new FilteredResultImpl($is_completed, $filtered);
    }
}