IsNumeric.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\Refinery\Numeric;
 
use ILIAS\Refinery\Custom\Constraint;
use ILIAS\Data;
use ilLanguage;
 
class IsNumeric extends Constraint
{
    public function __construct(Data\Factory $data_factory, ilLanguage $lng)
    {
        parent::__construct(
            static function ($value): bool {
                return is_numeric($value);
            },
            static function ($txt, $value): string {
                if ('' === $value) {
                    return (string) $txt("not_numeric_empty_string");
                }
 
                return (string) $txt("not_numeric", $value);
            },
            $data_factory,
            $lng
        );
    }
}