MultiSelect.php

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<?php
 
/* Copyright (c) 2018 Nils Haagen <nils.haagen@concepts-and-training.de> Extended GPL, see docs/LICENSE */
 
namespace ILIAS\UI\Implementation\Component\Input\Field;
 
use ILIAS\UI\Component as C;
use ILIAS\Data\Factory as DataFactory;
use ILIAS\Transformation\Factory as TransformationFactory;
use ILIAS\Validation\Factory as ValidationFactory;
 
class MultiSelect extends Input implements C\Input\Field\MultiSelect
{
 
    protected $options = [];
 
    public function __construct(
        DataFactory $data_factory,
        ValidationFactory $validation_factory,
        TransformationFactory $transformation_factory,
        $label,
        $options,
        $byline
    ) {
        parent::__construct($data_factory, $validation_factory, $transformation_factory, $label, $byline);
        $this->options = $options;
    }
 
    public function getOptions() : array
    {
        return $this->options;
    }
 
    protected function isClientSideValueOk($value)
    {
        if (is_null($value)) {
            return true;
        }
        if (is_array($value)) {
            foreach ($value as $v) {
                if (!array_key_exists($v, $this->options)) {
                    return false;
                }
            }
            return true;
        }
        return false;
    }
 
    protected function getConstraintForRequirement()
    {
        $constraint = $this->validation_factory->custom(
            function ($value) {
                return (is_array($value) && count($value) > 0);
            },
            "Empty"
        );
        return $constraint;
    }
}