Reduce responsibilities of PhabricatorPasteSearchEngine->buildSearchForm()

Summary:
Ref T2625. The specialized buildSearchForm() method has significant amounts of generic form construction responsibility right now. Lift the generic stuff above the Engine level. Also:

  - Rename "users" to "authors".
  - Use "users", not "searchowners" (which incorrectly includes "upforgrabs").
  - No need for "set_" prefixes anymore since we do GET redirects with query keys.
  - Use newer style for search stuff.

Test Plan:
Searched for stuff?

{F44342}

Reviewers: btrahan, blc

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2625

Differential Revision: https://secure.phabricator.com/D6061

src/applications/paste/controller/PhabricatorPasteListController.php

@@ -58,14 +58,28 @@ final class PhabricatorPasteListController extends PhabricatorPasteController {
     $list->setNoDataString(pht("No results found for this query."));
 
     if ($this->queryKey !== null || $filter == "filter/advanced") {
-      $form = $engine->buildSearchForm($saved_query);
-      $nav->appendChild($form);
+      $form = id(new AphrontFormView())
+        ->setNoShading(true)
+        ->setUser($user);
+
+      $engine->buildSearchForm($form, $saved_query);
+
+      $submit = id(new AphrontFormSubmitControl())
+        ->setValue(pht('Execute Query'));
+
+      if ($filter == 'filter/advanced') {
+        $submit->addCancelButton(
+          '/search/edit/'.$saved_query->getQueryKey().'/',
+          pht('Save Custom Query...'));
+      }
+
+      $form->appendChild($submit);
+
+      $filter_view = id(new AphrontListFilterView())->appendChild($form);
+      $nav->appendChild($filter_view);
     }
 
-    $nav->appendChild(
-      array(
-        $list,
-      ));
+    $nav->appendChild($list);
 
     $crumbs = $this
       ->buildApplicationCrumbs($nav)

src/applications/paste/query/PhabricatorPasteSearchEngine.php

@@ -18,7 +18,7 @@ final class PhabricatorPasteSearchEngine
     $saved = new PhabricatorSavedQuery();
     $saved->setParameter(
       'authorPHIDs',
-      array_values($request->getArr('set_users')));
+      array_values($request->getArr('authors')));
 
     try {
       $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
@@ -53,31 +53,21 @@ final class PhabricatorPasteSearchEngine
    * @param PhabricatorSavedQuery The query to populate the form with.
    * @return AphrontFormView The built form.
    */
-  public function buildSearchForm(PhabricatorSavedQuery $saved_query) {
+  public function buildSearchForm(
+    AphrontFormView $form,
+    PhabricatorSavedQuery $saved_query) {
     $phids = $saved_query->getParameter('authorPHIDs', array());
     $handles = id(new PhabricatorObjectHandleData($phids))
       ->setViewer($this->requireViewer())
       ->loadHandles();
-    $users_searched = mpull($handles, 'getFullName', 'getPHID');
-
-    $form = id(new AphrontFormView())
-      ->setUser($this->requireViewer());
+    $author_tokens = mpull($handles, 'getFullName', 'getPHID');
 
     $form->appendChild(
       id(new AphrontFormTokenizerControl())
-        ->setDatasource('/typeahead/common/searchowner/')
-        ->setName('set_users')
-        ->setLabel(pht('Users'))
-        ->setValue($users_searched));
-
-    $form->appendChild(
-      id(new AphrontFormSubmitControl())
-      ->setValue(pht('Query'))
-      ->addCancelButton(
-        '/search/edit/'.$saved_query->getQueryKey().'/',
-        pht('Save Custom Query...')));
-
-    return $form;
+        ->setDatasource('/typeahead/common/users/')
+        ->setName('authors')
+        ->setLabel(pht('Authors'))
+        ->setValue($author_tokens));
   }
 
   public function getQueryResultsPageURI($query_key) {