<?php

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Util;

use Composer\Config;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class Url
{
    public static function updateDistReference(Config $config, $url, $ref)
    {
        $host = parse_url($url, PHP_URL_HOST);

        if ($host === 'api.github.com' || $host === 'github.com' || $host === 'www.github.com') {
            if (preg_match('{^https?://(?:www\.)?github\.com/([^/]+)/([^/]+)/(zip|tar)ball/(.+)$}i', $url, $match)) {
                // update legacy github archives to API calls with the proper reference
                $url = 'https://api.github.com/repos/' . $match[1] . '/'. $match[2] . '/' . $match[3] . 'ball/' . $ref;
            } elseif (preg_match('{^https?://(?:www\.)?github\.com/([^/]+)/([^/]+)/archive/.+\.(zip|tar)(?:\.gz)?$}i', $url, $match)) {
                // update current github web archives to API calls with the proper reference
                $url = 'https://api.github.com/repos/' . $match[1] . '/'. $match[2] . '/' . $match[3] . 'ball/' . $ref;
            } elseif (preg_match('{^https?://api\.github\.com/repos/([^/]+)/([^/]+)/(zip|tar)ball(?:/.+)?$}i', $url, $match)) {
                // update api archives to the proper reference
                $url = 'https://api.github.com/repos/' . $match[1] . '/'. $match[2] . '/' . $match[3] . 'ball/' . $ref;
            }
        } elseif ($host === 'bitbucket.org' || $host === 'www.bitbucket.org') {
            if (preg_match('{^https?://(?:www\.)?bitbucket\.org/([^/]+)/([^/]+)/get/(.+)\.(zip|tar\.gz|tar\.bz2)$}i', $url, $match)) {
                // update Bitbucket archives to the proper reference
                $url = 'https://bitbucket.org/' . $match[1] . '/'. $match[2] . '/get/' . $ref . '.' . $match[4];
            }
        } elseif ($host === 'gitlab.com' || $host === 'www.gitlab.com') {
            if (preg_match('{^https?://(?:www\.)?gitlab\.com/api/v[34]/projects/([^/]+)/repository/archive\.(zip|tar\.gz|tar\.bz2|tar)\?sha=.+$}i', $url, $match)) {
                // update Gitlab archives to the proper reference
                $url = 'https://gitlab.com/api/v4/projects/' . $match[1] . '/repository/archive.' . $match[2] . '?sha=' . $ref;
            }
        } elseif (in_array($host, $config->get('github-domains'), true)) {
            $url = preg_replace('{(/repos/[^/]+/[^/]+/(zip|tar)ball)(?:/.+)?$}i', '$1/'.$ref, $url);
        } elseif (in_array($host, $config->get('gitlab-domains'), true)) {
            $url = preg_replace('{(/api/v[34]/projects/[^/]+/repository/archive\.(?:zip|tar\.gz|tar\.bz2|tar)\?sha=).+$}i', '${1}'.$ref, $url);
        }

        return $url;
    }

    public static function getOrigin(Config $config, $url)
    {
        if (0 === strpos($url, 'file://')) {
            return $url;
        }

        $origin = parse_url($url, PHP_URL_HOST);

        if (strpos($origin, '.github.com') === (strlen($origin) - 11)) {
            return 'github.com';
        }

        if ($origin === 'repo.packagist.org') {
            return 'packagist.org';
        }

        // Gitlab can be installed in a non-root context (i.e. gitlab.com/foo). When downloading archives the originUrl
        // is the host without the path, so we look for the registered gitlab-domains matching the host here
        if (
            is_array($config->get('gitlab-domains'))
            && false === strpos($origin, '/')
            && !in_array($origin, $config->get('gitlab-domains'))
        ) {
            foreach ($config->get('gitlab-domains') as $gitlabDomain) {
                if (0 === strpos($gitlabDomain, $origin)) {
                    return $gitlabDomain;
                }
            }
        }

        return $origin ?: $url;
    }

}