AddLabels.php

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<?php

declare(strict_types=1);

namespace ILIAS\Refinery\Container;

use ILIAS\Data\Factory;
use ILIAS\Data\Result;
use ILIAS\Refinery\Transformation;
use ILIAS\Refinery\DeriveInvokeFromTransform;
use InvalidArgumentException;

class AddLabels implements Transformation
{
    use DeriveInvokeFromTransform;

    private array $labels;
    private Factory $factory;

    public function __construct(array $labels, Factory $factory)
    {
        $this->labels = $labels;
        $this->factory = $factory;
    }

    public function transform($from): array
    {
        if (!is_array($from)) {
            throw new InvalidArgumentException(__METHOD__ . " argument is not an array.");
        }

        if (count($from) !== count($this->labels)) {
            throw new InvalidArgumentException(__METHOD__ . " number of items in arrays are not equal.");
        }

        return array_combine($this->labels, $from);
    }

    public function applyTo(Result $result): Result
    {
        $dataValue = $result->value();
        if (false === is_array($dataValue)) {
            $exception = new InvalidArgumentException(__METHOD__ . " argument is not an array.");
            return $this->factory->error($exception);
        }

        if (count($dataValue) !== count($this->labels)) {
            $exception = new InvalidArgumentException(__METHOD__ . " number of items in arrays are not equal.");
            return $this->factory->error($exception);
        }

        $value = array_combine($this->labels, $dataValue);
        $result = $this->factory->ok($value);

        return $result;
    }
}