public function processRequest()
 {
     $request = $this->getRequest();
     $current_user = $request->getUser();
     $error = null;
     $bad_redirect = false;
     $phid = $this->getClientPHID();
     // if we have a phid, then we're editing
     $this->setIsClientEdit($phid);
     if ($this->isClientEdit()) {
         $client = id(new PhabricatorOAuthServerClient())->loadOneWhere('phid = %s', $phid);
         $title = 'Edit OAuth Client';
         // validate the client
         if (empty($client)) {
             return new Aphront404Response();
         }
         if ($client->getCreatorPHID() != $current_user->getPHID()) {
             $message = 'Access denied to edit client with id ' . $phid . '. ' . 'Only the user who created the client has permission to ' . 'edit the client.';
             return id(new Aphront403Response())->setForbiddenText($message);
         }
         $submit_button = 'Save OAuth Client';
         $secret = null;
         // new client - much simpler
     } else {
         $client = new PhabricatorOAuthServerClient();
         $title = 'Create OAuth Client';
         $submit_button = 'Create OAuth Client';
         $secret = Filesystem::readRandomCharacters(32);
     }
     if ($request->isFormPost()) {
         $redirect_uri = $request->getStr('redirect_uri');
         $client->setName($request->getStr('name'));
         $client->setRedirectURI($redirect_uri);
         if ($secret) {
             $client->setSecret($secret);
         }
         $client->setCreatorPHID($current_user->getPHID());
         $uri = new PhutilURI($redirect_uri);
         $server = new PhabricatorOAuthServer();
         if (!$server->validateRedirectURI($uri)) {
             $error = new AphrontErrorView();
             $error->setSeverity(AphrontErrorView::SEVERITY_ERROR);
             $error->setTitle('Redirect URI must be a fully qualified domain name ' . 'with no fragments. See ' . 'http://tools.ietf.org/html/draft-ietf-oauth-v2-23#section-3.1.2 ' . 'for more information on the correct format.');
             $bad_redirect = true;
         } else {
             $client->save();
             // refresh the phid in case its a create
             $phid = $client->getPHID();
             if ($this->isClientEdit()) {
                 return id(new AphrontRedirectResponse())->setURI('/oauthserver/client/?edited=' . $phid);
             } else {
                 return id(new AphrontRedirectResponse())->setURI('/oauthserver/client/?new=' . $phid);
             }
         }
     }
     $panel = new AphrontPanelView();
     if ($this->isClientEdit()) {
         $delete_button = phutil_render_tag('a', array('href' => $client->getDeleteURI(), 'class' => 'grey button'), 'Delete OAuth Client');
         $panel->addButton($delete_button);
     }
     $panel->setHeader($title);
     $form = id(new AphrontFormView())->setUser($current_user)->appendChild(id(new AphrontFormTextControl())->setLabel('Name')->setName('name')->setValue($client->getName()));
     if ($this->isClientEdit()) {
         $form->appendChild(id(new AphrontFormTextControl())->setLabel('ID')->setValue($phid))->appendChild(id(new AphrontFormStaticControl())->setLabel('Secret')->setValue($client->getSecret()));
     }
     $form->appendChild(id(new AphrontFormTextControl())->setLabel('Redirect URI')->setName('redirect_uri')->setValue($client->getRedirectURI())->setError($bad_redirect));
     if ($this->isClientEdit()) {
         $created = phabricator_datetime($client->getDateCreated(), $current_user);
         $updated = phabricator_datetime($client->getDateModified(), $current_user);
         $form->appendChild(id(new AphrontFormStaticControl())->setLabel('Created')->setValue($created))->appendChild(id(new AphrontFormStaticControl())->setLabel('Last Updated')->setValue($updated));
     }
     $form->appendChild(id(new AphrontFormSubmitControl())->setValue($submit_button));
     $panel->appendChild($form);
     return $this->buildStandardPageResponse(array($error, $panel), array('title' => $title));
 }