Chrisyue\PhpM3u8\M3u8\Transformer\AbstractAttributeList

Complexity

Total Complexity

9

Size/Duplication

Total Lines	44
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Importance

Changes

0

4 Methods

Rating	Name	Duplication	Size	Complexity
B	transform()	0	22	6
A	reverse()	0	14	3
	getTransformers()	0	1	?
	initResult()	0	1	?

<?php

namespace Chrisyue\PhpM3u8\M3u8\Transformer;

abstract class AbstractAttributeList implements TransformerInterface
{
    public function transform($origin)
    {
        preg_match_all('/(?<=^|,)[A-Z0-9-]+=("?).+?\1(?=,|$)/', $origin, $matches);

        $result = $this->initResult();
        $parsed = false;
        foreach ($matches[0] as $attr) {
            list($name, $value) = explode('=', $attr);
            foreach ($this->getTransformers() as $property => $transformer) {
                if (null !== $result->$property || $transformer->getName() !== $name) {
                    continue;
                }

                $result->$property = $transformer->transform($value);
                $parsed = true;

                break;
            }
        }

        return $parsed ? $result : null;
    }

    public function reverse($result)
    {
        $attributes = [];
        foreach ($this->getTransformers() as $property => $transformer) {
            $attributes[$transformer->getName()] = $result->$property;
        }

        $keyVals = [];
        foreach ($attributes as $name => $attribute) {
            $keyVals[] = sprintf('%s=%s', $name, $attribute);
        }

        return implode(',', $keyVals);
    }

    abstract protected function getTransformers();

    abstract protected function initResult();
}