Numeric.php

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<?php
 
/* Copyright (c) 2017 Timon Amstutz <timon.amstutz@ilub.unibe.ch> Extended GPL, see
docs/LICENSE */
 
namespace ILIAS\UI\Implementation\Component\Input\Field;
 
use ILIAS\Data\Factory as DataFactory;
use ILIAS\UI\Component as C;
use ILIAS\UI\Component\Signal;
 
class Numeric extends Input implements C\Input\Field\Numeric
{
    public function __construct(
        DataFactory $data_factory,
        \ILIAS\Refinery\Factory $refinery,
        $label,
        $byline
    ) {
        parent::__construct($data_factory, $refinery, $label, $byline);
 
        $trafo_empty2null = $this->refinery->custom()->transformation(
            function ($v) {
                if (trim($v) === '') {
                    return null;
                }
                return $v;
            },
            ""
        );
        $trafo_numericOrNull = $this->refinery->logical()->logicalOr([
            $this->refinery->numeric()->isNumeric(),
            $this->refinery->null()
        ])
        ->withProblemBuilder(function ($txt, $value) {
            return $txt("ui_numeric_only");
        });
 
        $this->setAdditionalTransformation($trafo_empty2null);
        $this->setAdditionalTransformation($trafo_numericOrNull);
    }
 
    protected function isClientSideValueOk($value) : bool
    {
        return is_numeric($value) || $value === "" || $value === null;
    }
 
    protected function getConstraintForRequirement()
    {
        return $this->refinery->numeric()->isNumeric();
    }
 
    public function getUpdateOnLoadCode() : \Closure
    {
        return function ($id) {
            $code = "$('#$id').on('input', function(event) {
                                il.UI.input.onFieldUpdate(event, '$id', $('#$id').val());
                        });
                        il.UI.input.onFieldUpdate(event, '$id', $('#$id').val());";
            return $code;
        };
    }
}