Wrapper.php

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<?php

namespace ILIAS\UI\Implementation\Component\Dropzone\File;

use ILIAS\UI\Component\Component;
use ILIAS\UI\Implementation\Component\ComponentHelper;

class Wrapper extends File implements \ILIAS\UI\Component\Dropzone\File\Wrapper
{

    protected $components;


    public function __construct($url, $content)
    {
        parent::__construct($url);
        $this->components = $this->toArray($content);
        $types = array( Component::class );
        $this->checkArgListElements('content', $this->components, $types);
        $this->checkEmptyArray($this->components);
    }


    public function withContent($content)
    {
        $clone = clone $this;
        $clone->components = $this->toArray($content);
        $types = array( Component::class );
        $this->checkArgListElements('content', $clone->components, $types);
        $this->checkEmptyArray($clone->components);

        return $clone;
    }


    public function getContent()
    {
        return $this->components;
    }


    private function checkEmptyArray(array $array)
    {
        if (count($array) === 0) {
            throw new \LogicException("At least one component from the UI framework is required, otherwise
                        the wrapper dropzone is not visible.");
        }
    }
}