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Edit File: QueryDefaultsPlugin.php

<?php

namespace AmeliaHttp\Client\Common\Plugin;

use AmeliaHttp\Client\Common\Plugin;
use AmeliaPsr\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;
    }

/**
     * {@inheritdoc}
     */
    public function handleRequest(RequestInterface $request, callable $next, callable $first)
    {
        $uri = $request->getUri();

parse_str($uri->getQuery(), $query);
        $query += $this->queryParams;

$request = $request->withUri(
            $uri->withQuery(http_build_query($query))
        );

return $next($request);
    }
}

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