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\UI\Component\Signal;

class MultiSelect extends Input implements C\Input\Field\MultiSelect
{

    protected $options = [];

    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() : array
    {
        return $this->options;
    }

    protected function isClientSideValueOk($value) : bool
    {
        if (is_null($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 = $this->refinery->custom()->constraint(
            function ($value) {
                return (is_array($value) && count($value) > 0);
            },
            "Empty"
        );
        return $constraint;
    }

    public function getUpdateOnLoadCode() : \Closure
    {
        return function ($id) {
            $code = "var checkedBoxes = function() {
                                var options = {};
                                var options_combined = [];
                                $('#$id').find('input').each(function() {
                                        options[$(this).val()] = $(this).prop('checked').toString();
                                });
                                for (let [key, value] of Object.entries(options)) {
                                        options_combined.push(key + ': ' + value);
                                }
                                return options_combined.join(', ');
                        }
                        $('#$id').on('input', function(event) {
                                il.UI.input.onFieldUpdate(event, '$id', checkedBoxes());
                        });
                        il.UI.input.onFieldUpdate(event, '$id', checkedBoxes());
                        ";
            return $code;
        };
    }
}