Route.php

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<?php

namespace Elgg\Router;

class Route extends \Symfony\Component\Routing\Route {

    protected $parameters = [];

    public function setMatchedParameters(array $parameters) {
        $this->parameters = $parameters;

        return $this;
    }

    public function getMatchedParameters() {
        return $this->parameters;
    }

    public function getName() {
        return elgg_extract('_route', $this->parameters);
    }

    public function resolvePageOwner() {

        $params = $this->getMatchedParameters();
        $route_name = $this->getName();

        $route_parts = explode(':', $route_name);

        $from_guid = function ($guid) {
            return elgg_call(ELGG_IGNORE_ACCESS, function() use ($guid) {
                $entity = get_entity($guid);
                if ($entity instanceof \ElggObject) {
                    return $entity->getContainerEntity();
                }
                
                return $entity;
            });
        };

        switch ($route_parts[0]) {
            case 'view':
            case 'edit':
                $username = (string) elgg_extract('username', $params);
                if (!empty($username)) {
                    return elgg_get_user_by_username($username);
                }

                $guid = (int) elgg_extract('guid', $params);
                if (!empty($guid)) {
                    return $from_guid($guid);
                }
                break;

            case 'add':
            case 'collection':
                $username = (string) elgg_extract('username', $params);
                if (!empty($username)) {
                    return elgg_get_user_by_username($username);
                }

                $guid = (int) elgg_extract('guid', $params);
                if (!empty($guid)) {
                    return $from_guid($guid);
                }

                $container_guid = (int) elgg_extract('container_guid', $params);
                if (!empty($container_guid)) {
                    return $from_guid($container_guid);
                }
                break;
                
            default:
                // route name doesn't support auto detection of page_owner
                // but there is information in the route which could support it
                // and the developer requests that detection is tried
                if (!(bool) $this->getDefault('_detect_page_owner')) {
                    break;
                }
                
                $username = (string) elgg_extract('username', $params);
                if (!empty($username)) {
                    return elgg_get_user_by_username($username);
                }
                
                $guid = (int) elgg_extract('guid', $params);
                if (!empty($guid)) {
                    return $from_guid($guid);
                }
                
                $container_guid = (int) elgg_extract('container_guid', $params);
                if (!empty($container_guid)) {
                    return $from_guid($container_guid);
                }
                break;
        }
    }
}