SplitString.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\String;

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

class SplitString implements Transformation
{
    protected $delimiter;

    private $factory;

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

    public function transform($from)
    {
        if (!is_string($from)) {
            throw new \InvalidArgumentException(__METHOD__ . " the argument is not a string.");
        }

        return explode($this->delimiter, $from);
    }

    public function __invoke($from)
    {
        return $this->transform($from);
    }

    public function applyTo(Result $data) : Result
    {
        $dataValue = $data->value();
        if (false === is_string($dataValue)) {
            $exception = new \InvalidArgumentException(__METHOD__ . " the argument is not a string.");
            return $this->factory->error($exception);
        }

        $value = explode($this->delimiter, $dataValue);
        return $this->factory->ok($value);
    }
}