ListTransformation.php

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<?php

declare(strict_types=1);

namespace ILIAS\Refinery\KindlyTo\Transformation;

use ILIAS\Refinery\DeriveApplyToFromTransform;
use ILIAS\Refinery\DeriveInvokeFromTransform;
use ILIAS\Refinery\Transformation;

class ListTransformation implements Transformation
{
    use DeriveApplyToFromTransform;
    use DeriveInvokeFromTransform;

    private Transformation $transformation;

    public function __construct(Transformation $transformation)
    {
        $this->transformation = $transformation;
    }

    public function transform($from): array
    {
        if (!is_array($from)) {
            $from = [$from];
        }

        $result = [];
        foreach ($from as $val) {
            $transformedVal = $this->transformation->transform($val);
            $result[] = $transformedVal;
        }

        return $result;
    }
}