<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/

declare(strict_types=1);

namespace Magento\Framework\App\Request;

/**
* Map of HTTP methods and interfaces that an action implements in order to process them.
*/
class HttpMethodMap
{
/**
* @var string[]
*/
private $map;

/**
* @param string[] $map
*/
public function __construct(array $map)
{
$this->map = $this->processMap($map);
}

/**
* Filter given map.
*
* @param array $map
* @throws \InvalidArgumentException
*
* @return string[]
*/
private function processMap(array $map): array
{
$filtered = [];
foreach ($map as $method => $interface) {
$interface = trim(preg_replace('/^\\\+/', '', $interface));
if (!(interface_exists($interface) || class_exists($interface))) {
throw new \InvalidArgumentException(
"Interface '$interface' does not exist"
);
}
if (!$method) {
throw new \InvalidArgumentException('Invalid method given');
}

$filtered[$method] = $interface;
}

return $filtered;
}

/**
* Where keys are methods' names and values are interfaces' names.
*
* @return string[]
*
* @see \Laminas\Http\Request Has list of methods as METHOD_* constants.
*/
public function getMap(): array
{
return $this->map;
}
}