Silex Crud Controller

<?php

use Extensions\EntityCollection;
use Extensions\Crud;
use Extensions\Entity;
use Extensions\CrudEntity;
use Extensions\ArchiveInterface;

$app->match('/unit/edit/{entityClass}/{id}', function ($entityClass, $id) use ($app, $_CONFIG)
{
    $entity = Crud::createEntity($entityClass, $id);
    $form = $entity->getForm();
    $form->handleRequest($app['request']);
    if($form->isValid()) {
        $entity->populateByForm($form)->save();
        return $app->redirect(Crud::redirect($entity->getUserFriendlyUrl()));
    }
    $formTemplate = 'crud/' . $entityClass . '/form.twig';
    $formTemplate = file_exists(ROOT . '/tpl/' . $formTemplate)
            ? $formTemplate
            : 'crud/form.twig';
    return Crud::renderContainer(
        $app['twig']->render(
            $formTemplate,
            array (
                'form'      => $form->createView(),
                'formTitle' => $entity->getFormTitle()
            )
        )
    );
})
        ->value('id', null);

$app->get('/unit/remove/{entityClass}/{id}', function ($entityClass, $id) use ($app, $_CONFIG)
{
    Crud::createEntity($entityClass, $id)->remove();
    return $app->redirect(Crud::redirect('/unit/list/' . $entityClass));
});

foreach(CrudEntity::$registeredEntities as $entityClass)
{
    $app->get('/' . $entityClass . 's/{page}', function ($page) use ($app, $_CONFIG, $entityClass)
    {
        $perPage = 10;
        $collection = EntityCollection::create(Crud::dashed2camel($entityClass));
        $entities = $collection->populateFromDb(
            $page,
            $perPage,
            $collection->createNewEntity()->getDefaultSearchParams(),
            array(
                'position' => 1
            )
        )->toArray();
        $unitListTemplate = 'crud/' . $entityClass . '/list.twig';
        $listTemplate = file_exists(ROOT . '/tpl/' . $unitListTemplate)
                ? $unitListTemplate
                : 'crud/list.twig';
        $pagerLength = 5;
        $pageTotal = $collection->getPages($perPage);
        if($pagerLength < $pageTotal) {
            $pagerLength = $pageTotal;
        }
        return Crud::renderContainer(
            $app['twig']->render(
                $listTemplate,
                array (
                    'entities'      => $entities,
                    'rowTemplate'   => 'crud/' . $entityClass . '/row.twig',
                    'pages'         => $pageTotal,
                    'current_page'  => $page,
                    'entityClass'   => $entityClass,
                    'pagerLength'   => $pagerLength,
                    'pageTitle'     => $collection->createNewEntity()->getListTitle(),
                    'tableHeader'   => 'crud/' . $entityClass . '/table-header.twig'
                )
            )
        );
    })
    ->value('page', 1)
    ->assert('page', '\d+');;

    $app->get('/' . $entityClass . '/{url}', function ($url) use ($app, $_CONFIG, $entityClass)
    {
        $entity = Entity::create(Crud::dashed2camel($entityClass));
        $data = $entity->findByUrl($url);
        if(! $data) {
            $app->abort(404, 'Entity not found');
        }
        $entity->setData($data);
        return Crud::renderContainer(
            $app['twig']->render(
                'crud/' . $entityClass . '/show.twig',
                array(
                    'entity' => $entity
                )
            ), $entity
        );
    });

    $app->get('/' . $entityClass . 's/archive/{page}', function ($page)
            use ($app, $entityClass)
    {
        $entity = Entity::create(Crud::dashed2camel($entityClass));
        if(! $entity instanceof ArchiveInterface) {
            $app->abort(500, 'Invalid archived entity');
        }
        $pagination = $entity->getArchivePagination($page);
        $entities = $pagination->getEntities($entity->getArchivedSearchCriteria());
        return Crud::renderContainer(
            $app['twig']->render(
                'crud/' . $entityClass . '/list.twig',
                array (
                    'entities'      => $entities,
                    'rowTemplate'   => 'crud/' . $entityClass . '/row.twig',
                    'pages'         => $pagination->getCountPages(),
                    'current_page'  => $pagination->getCurrentPage(),
                    'entityClass'   => $entityClass,
                    'pagerUrl'      => $pagination->getUrl(),
                    'pagerLength'   => $pagination->getPagerLength(),
                    'pageTitle'     => $entity->getArchivePageTitle(),
                    'tableHeader'   => 'crud/' . $entityClass . '/table-header.twig'
                )
            )
        );
    })
    ->value('page', 1);
}