Select.php

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<?php

/* Copyright (c) 2017 Jesús López <lopez@leifos.com> 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 Select extends Input implements C\Input\Field\Select
{
    protected $options;
    protected $label;
    protected $value;

    public function __construct(
        DataFactory $data_factory,
        \ILIAS\Refinery\Factory $refinery,
        $label,
        $options,
        $byline
    ) {
        parent::__construct($data_factory, $refinery, $label, $byline);
        $this->options = $options;
    }

    public function getOptions()
    {
        return $this->options;
    }

    protected function isClientSideValueOk($value) : bool
    {
        return
            in_array($value, array_keys($this->options))
            || $value == "";
    }

    protected function getConstraintForRequirement()
    {
        return $this->refinery->string()->hasMinLength(1);
    }

    public function getUpdateOnLoadCode() : \Closure
    {
        return function ($id) {
            $code = "$('#$id').on('input', function(event) {
                                il.UI.input.onFieldUpdate(event, '$id', $('#$id option:selected').text());
                        });
                        il.UI.input.onFieldUpdate(event, '$id', $('#$id option:selected').text());";
            return $code;
        };
    }
}