<?php

declare (strict_types=1);
namespace ShopMagicVendor\Http\Client\Common\Plugin;

use ShopMagicVendor\Http\Client\Common\Plugin;
use ShopMagicVendor\Http\Promise\Promise;
use ShopMagicVendor\Psr\Http\Message\RequestInterface;
/**
 * Set query to default value if it does not exist.
 *
 * If a given query parameter already exists the value wont be replaced and the request wont be changed.
 *
 * @author Tobias Nyholm <tobias.nyholm@gmail.com>
 */
final class QueryDefaultsPlugin implements Plugin
{
    /**
     * @var array
     */
    private $queryParams = [];
    /**
     * @param array $queryParams Hashmap of query name to query value. Names and values must not be url encoded as
     *                           this plugin will encode them
     */
    public function __construct(array $queryParams)
    {
        $this->queryParams = $queryParams;
    }
    public function handleRequest(RequestInterface $request, callable $next, callable $first): Promise
    {
        $uri = $request->getUri();
        parse_str($uri->getQuery(), $query);
        $query += $this->queryParams;
        $request = $request->withUri($uri->withQuery(http_build_query($query)));
        return $next($request);
    }
}
