A quick mock up of generating routes from a Route config

RouteFinder.php

<?php

namespace League\Route\RouteGenerator;

final class RouteGenerator
{
    private $routes;

    public function __construct(
        array $routes = []
    ) {
        $this->routes = $routes;
    }

    public function generateRoute($alias, array $params = [])
    {
        $route = $this->findRoute($alias);

        $elements = array_map(function($element) use ($params) {
            foreach ($params as $key => $value) {
                if (preg_match('#\{'.$key.'\}#', $element, $matches)) {
                    return preg_replace('#\{'.$key.'\}#', $value, $matches[0]);
                }
            }
            return $element;
        }, explode('/', $route['pattern']));

        return sprintf(
            '%s://%s%s',
            'http',
            $_SERVER['HTTP_HOST'],
            implode('/', $elements)
        );

        return filter_var($route, FILTER_VALIDATE_URL);
    }

    private function findRoute($alias)
    {
        foreach($this->routes as $modules) {
            if (array_key_exists($alias, $modules)) {
                return $modules[$alias];
            }
        }

        throw new \Exception(sprintf('The route [%s] does not exist. Please check your configuration.', $alias));
    }
}