NuanceSourceActionController.php

<?php

final class NuanceSourceActionController extends NuanceController {

  public function handleRequest(AphrontRequest $request) {
    $viewer = $this->getViewer();

    $source = id(new NuanceSourceQuery())
      ->setViewer($viewer)
      ->withIDs(array($request->getURIData('id')))
      ->executeOne();
    if (!$source) {
      return new Aphront404Response();
    }

    $def = $source->getDefinition();

    $def
      ->setViewer($viewer)
      ->setSource($source);

    $response = $def->handleActionRequest($request);
    if ($response instanceof AphrontResponse) {
      return $response;
    }

    $title = $source->getName();
    $crumbs = $this->buildApplicationCrumbs();
    $crumbs->addTextCrumb($title);

    return $this->newPage()
      ->setTitle($title)
      ->setCrumbs($crumbs)
      ->appendChild($response);
  }

}