This is pull 7 out of 7 to complete the goals set in #2604

App now extends RouteCollectorProxy which provides all of the route mapping functionality.

App::group() Breaking Change
There is a breaking change with App::group(). Now the callable gets a RouteCollectorProxyInterface instance injected which used to be App. All of the original route mapping functionality remains intact.

The new interface implements the following methods:

• RouteCollectorProxy::getCallableResolver()
• RouteCollectorProxy::getContainer()
• RouteCollectorProxy::getRouteCollector()
• RouteCollectorProxy::get()
• RouteCollectorProxy::post()
• RouteCollectorProxy::put()
• RouteCollectorProxy::patch()
• RouteCollectorProxy::delete()
• RouteCollectorProxy::options()
• RouteCollectorProxy::any()
• RouteCollectorProxy::getBasePath()
• RouteCollectorProxy::setBasePath()

The following methods on RouteCollectorInterface are removed:

• RouteCollectorInterface::pushGroup()
• RouteCollectorInterface::popGroup()

The following method on RouteCollectorInterface is introduced:

• RouteCollectorInterface::group() which replaces pushGroup() and popGroup()

Example Usage:

use Slim\App;
use Slim\Http\Factory\DecoratedResponseFactory;
use Slim\Http\ServerRequest;
use Slim\Interfaces\RouteCollectorProxyInterface;
use Slim\Psr7\Factory\ResponseFactory;
use Slim\Psr7\Factory\ServerRequestFactory;
use Slim\Psr7\Factory\StreamFactory;

$responseFactory = new DecoratedResponseFactory(new ResponseFactory(), new StreamFactory());
$app = new App($responseFactory);

/**
 * As mentioned above, the breaking change introduced here is
 * that we don't inject App in the route group callable anymore.
 */
$app->group('/app', function (RouteCollectorProxyInterface $group) {
    $group->get('/hello/{name}', function ($request, $response, $args) {
        return $response;
    });
});

$request = new ServerRequest(ServerRequestFactory::createFromGlobals());
$app->run($request);