BEAR\Resource\RequiredParam

Complexity

Total Complexity

3

Size/Duplication

Total Lines	21
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
A	__invoke()	0	16	3

<?php

declare(strict_types=1);

namespace BEAR\Resource;

use BEAR\Resource\Exception\ParameterException;
use Override;
use Ray\Di\InjectorInterface;

use function array_key_exists;
use function ltrim;
use function preg_replace;
use function strtolower;

/** @psalm-import-type Query from Types */
final class RequiredParam implements ParamInterface
{
    /**
     * {@inheritDoc}
     */
    #[Override]
    public function __invoke(string $varName, array $query, InjectorInterface $injector)
    {
        if (array_key_exists($varName, $query)) {
            return $query[$varName];
        }

        // try camelCase variable name
        $snakeName = ltrim(strtolower((string) preg_replace('/[A-Z]/', '_\0', $varName)), '_');
        if (array_key_exists($snakeName, $query)) {
            return $query[$snakeName];
        }

        unset($injector);

        throw new ParameterException($varName);
    }
}