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<?php
namespace Wikimedia\CommonPasswords;
use Pleo\BloomFilter\BloomFilter;
class CommonPasswords {
    /**
     * @return BloomFilter
     */
    private static function getFilter() {
        static $filter = null;
        if ( $filter === null ) {
            $filter = BloomFilter::initFromJson(
                json_decode(
                    file_get_contents(
                        __DIR__ . '/' . ( PHP_INT_SIZE === 8 ? 'common-x64.json' : 'common-x86.json' )
                    ),
                    true
                )
            );
        }
        return $filter;
    }
    /**
     * @param string $password Password to check if it's considered common
     * @return bool
     */
    public static function isCommon( $password ) {
        return self::getFilter()->exists( $password );
    }
}