AddLabels.php

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<?php
/* Copyright (c) 2017 Stefan Hecken <stefan.hecken@concepts-and-training.de> Extended GPL, see docs/LICENSE */
 
namespace ILIAS\Refinery\Container;
 
use ILIAS\Data\Factory;
use ILIAS\Data\Result;
use ILIAS\Refinery\Transformation;
use ILIAS\Refinery\DeriveInvokeFromTransform;
 
class AddLabels implements Transformation
{
    use DeriveInvokeFromTransform;
 
    protected $labels;
 
    private $factory;
 
    public function __construct(array $labels, Factory $factory)
    {
        $this->labels = $labels;
        $this->factory = $factory;
    }
 
    public function transform($from)
    {
        if (!is_array($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 $data) : Result
    {
        $dataValue = $data->value();
        if (false === is_array($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;
    }
}