FRZB\Component\RequestMapper\Extractor\DiscriminatorMapExtractor

Complexity

Total Complexity

5

Size/Duplication

Total Lines	27
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	extract()	0	10	2
A	getDiscriminatorMapAttribute()	0	11	3

<?php

declare(strict_types=1);

namespace FRZB\Component\RequestMapper\Extractor;

use FRZB\Component\DependencyInjection\Attribute\AsService;
use FRZB\Component\RequestMapper\Exception\ClassExtractorException;
use Symfony\Component\Serializer\Annotation\DiscriminatorMap;

#[AsService]
class DiscriminatorMapExtractor
{
    /** @throws ClassExtractorException */
    public function extract(string $class, array $parameters): string
    {
        if ($discriminatorMap = $this->getDiscriminatorMapAttribute($class)) {
            $property = $discriminatorMap->getTypeProperty();
            $mapping = $discriminatorMap->getMapping();
            $parameter = $parameters[$property] ?? throw ClassExtractorException::fromDiscriminatorMapWhenParameterIsNull($discriminatorMap);
            $class = $mapping[$parameter] ?? throw ClassExtractorException::fromDiscriminatorMapWhenParameterInvalid($discriminatorMap);
        }

        return $class;
    }

    private function getDiscriminatorMapAttribute(string $class): ?DiscriminatorMap
    {
        try {
            $discriminators = array_map(
                static fn (\ReflectionAttribute $attribute) => $attribute->newInstance(),
                (new \ReflectionClass($class))->getAttributes(DiscriminatorMap::class),
            );

            return current($discriminators) ?: null;
        } catch (\ReflectionException) {
            return null;
        }
    }
}