Update OAuthServer for modern SearchEngine fields

Summary: Ref T7303. Small modernization.

Test Plan:
  - Searched by various users.
  - Viewed all, reordered, etc.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T7303

Differential Revision: https://secure.phabricator.com/D15606

src/applications/oauthserver/query/PhabricatorOAuthServerClientSearchEngine.php

@@ -11,40 +11,30 @@ final class PhabricatorOAuthServerClientSearchEngine
     return 'PhabricatorOAuthServerApplication';
   }
 
-  public function buildSavedQueryFromRequest(AphrontRequest $request) {
-    $saved = new PhabricatorSavedQuery();
-
-    $saved->setParameter(
-      'creatorPHIDs',
-      $this->readUsersFromRequest($request, 'creators'));
-
-    return $saved;
+  public function newQuery() {
+    return id(new PhabricatorOAuthServerClientQuery());
   }
 
-  public function buildQueryFromSavedQuery(PhabricatorSavedQuery $saved) {
-    $query = id(new PhabricatorOAuthServerClientQuery());
+  protected function buildQueryFromParameters(array $map) {
+    $query = $this->newQuery();
 
-    $creator_phids = $saved->getParameter('creatorPHIDs', array());
-    if ($creator_phids) {
-      $query->withCreatorPHIDs($saved->getParameter('creatorPHIDs', array()));
+    if ($map['creatorPHIDs']) {
+      $query->withCreatorPHIDs($map['creatorPHIDs']);
     }
 
     return $query;
   }
 
-  public function buildSearchForm(
-    AphrontFormView $form,
-    PhabricatorSavedQuery $saved_query) {
-
-    $creator_phids = $saved_query->getParameter('creatorPHIDs', array());
-
-    $form
-      ->appendControl(
-        id(new AphrontFormTokenizerControl())
-          ->setDatasource(new PhabricatorPeopleDatasource())
-          ->setName('creators')
-          ->setLabel(pht('Creators'))
-          ->setValue($creator_phids));
+  protected function buildCustomSearchFields() {
+    return array(
+      id(new PhabricatorUsersSearchField())
+        ->setAliases(array('creators'))
+        ->setKey('creatorPHIDs')
+        ->setConduitKey('creators')
+        ->setLabel(pht('Creators'))
+        ->setDescription(
+          pht('Search for applications created by particular users.')),
+    );
   }
 
   protected function getURI($path) {