<?php

/*
 * This file is part of GNU social - https://www.gnu.org/software/social
 *
 * GNU social is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GNU social is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * Dynamic router loader and URLMapper interface atop Symfony's router
 *
 * Converts a path into a set of parameters, and vice versa
 *
 * @package   GNUsocial
 * @category  URL
 *
 * @author    Hugo Sales <hugo@fc.up.pt>
 * @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 */

namespace App\Util;

use Symfony\Component\Config\Loader\Loader;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;

class RouteLoader extends Loader
{
    private RouteCollection $rc;

    /**
     * Route loading entry point, called from `config/routes.php`
     *
     * Must comform to symfony's interface, but the $resource is unused
     * and $type must not be null
     *
     * @param mixed $resource
     */
    public function load($resource, string $type = null): RouteCollection
    {
        $this->rc = new RouteCollection();

        $route_files = glob(INSTALLDIR . '/src/Routes/*.php');
        foreach ($route_files as $file) {
            require_once $file;
            $ns = '\\App\\Routes\\' . basename($file, '.php');
            $ns::load($this);
        }

        return $this->rc;
    }

    /**
     * Connect a route to a controller
     *
     * @param mixed  $target  Some kind of callable, typically [object, method]
     * @param ?array $options Possible keys are ['condition', 'defaults', 'format',
     *                        'fragment', 'http-methods', 'locale', 'methods', 'schemes']
     *                        'http-methods' and 'methods' are aliases
     */
    public function connect(string $id, string $uri_path, $target, ?array $param_reqs = [], ?array $options = [])
    {
        $this->rc->add($id,
                       new Route(
                           // path -- URI path
                           $uri_path,
                           // defaults = []     -- param default values,
                           // and special configuration options
                           array_merge(
                               [
                                   '_controller' => is_array($target) ? $target : [$target, '__invoke'],
                                   '_format'     => $options['format']   ?? 'html',
                                   '_fragment'   => $options['fragment'] ?? '',
                                   '_locale'     => $options['locale']   ?? '',
                               ],
                               $options['defaults'] ?? []),
                           // requirements = [] -- param => regex
                           $param_reqs,
                           // options = []      -- possible keys: compiler_class:, utf8
                           // No need for a special compiler class for now,
                           // Enforce UTF8
                           ['utf8' => true],
                           // host = ''         -- hostname (subdomain, for instance) to match,
                           // we don't want this
                           '',
                           // schemes = []      -- URI schemes (https, ftp and such)
                           $options['schemes'] ?? [],
                           // methods = []      -- HTTP methods
                           $options['http-methods'] ?? $options['methods'] ?? [],
                           // condition = ''    -- Symfony condition expression,
                           // see https://symfony.com/doc/current/routing.html#matching-expressions
                           $options['condition'] ?? ''
                       )
        );
    }

    /**
     * Whether this loader supports loading this route type
     * Passed the arguments from the `RoutingConfigurator::import` call from
     * `config/routes.php`
     *
     * @param mixed $resource Unused
     */
    public function supports($resource, string $type = null)
    {
        return 'GNUsocial' === $type;
    }
}