Reverse project paging order

Summary:
Currently, we're showing projets in reverse order (Z..A) because most cursor pagers go from high IDs to low IDs.

Allow sequence to be reversed; reverse it.

Also simplify some query/paging stuff.

Test Plan: Set page size to 1, paged back and forth.

Reviewers: vrana, btrahan

Reviewed By: vrana

CC: aran

Maniphest Tasks: T603

Differential Revision: https://secure.phabricator.com/D3221

src/applications/project/controller/PhabricatorProjectListController.php

@@ -46,8 +46,7 @@ final class PhabricatorProjectListController
 
     $query = new PhabricatorProjectQuery();
     $query->setViewer($request->getUser());
-    $query->setOffset($pager->getOffset());
-    $query->setLimit($pager->getPageSize() + 1);
+    $query->needMembers(true);
 
     $view_phid = $request->getUser()->getPHID();
 
@@ -69,8 +68,7 @@ final class PhabricatorProjectListController
         break;
     }
 
-    $projects = $query->execute();
-    $projects = $pager->sliceResults($projects);
+    $projects = $query->executeWithOffsetPager($pager);
 
     $project_phids = mpull($projects, 'getPHID');
 
@@ -82,14 +80,6 @@ final class PhabricatorProjectListController
       $profiles = mpull($profiles, null, 'getProjectPHID');
     }
 
-    $edge_query = new PhabricatorEdgeQuery();
-    if ($projects) {
-      $edge_query
-        ->withSourcePHIDs($project_phids)
-        ->withEdgeTypes(array(PhabricatorEdgeConfig::TYPE_PROJ_MEMBER))
-        ->execute();
-    }
-
     $tasks = array();
     $groups = array();
     if ($project_phids) {
@@ -112,7 +102,7 @@ final class PhabricatorProjectListController
       $phid = $project->getPHID();
 
       $profile = idx($profiles, $phid);
-      $members = $edge_query->getDestinationPHIDs(array($phid));
+      $members = $project->getMemberPHIDs();
 
       $group = idx($groups, $phid, array());
       $task_count = count($group);

src/applications/project/query/PhabricatorProjectQuery.php

@@ -64,6 +64,10 @@ final class PhabricatorProjectQuery extends PhabricatorCursorPagedPolicyQuery {
     return $result->getName();
   }
 
+  protected function getReversePaging() {
+    return true;
+  }
+
   public function loadPage() {
     $table = new PhabricatorProject();
     $conn_r = $table->establishConnection('r');

src/infrastructure/query/policy/PhabricatorCursorPagedPolicyQuery.php

@@ -34,6 +34,10 @@ abstract class PhabricatorCursorPagedPolicyQuery
     return $result->getID();
   }
 
+  protected function getReversePaging() {
+    return false;
+  }
+
   protected function nextPage(array $page) {
     if ($this->beforeID) {
       $this->beforeID = $this->getPagingValue(head($page));
@@ -66,14 +70,16 @@ abstract class PhabricatorCursorPagedPolicyQuery
     if ($this->beforeID) {
       return qsprintf(
         $conn_r,
-        '%Q > %s',
+        '%Q %Q %s',
         $this->getPagingColumn(),
+        $this->getReversePaging() ? '<' : '>',
         $this->beforeID);
     } else if ($this->afterID) {
       return qsprintf(
         $conn_r,
-        '%Q < %s',
+        '%Q %Q %s',
         $this->getPagingColumn(),
+        $this->getReversePaging() ? '>' : '<',
         $this->afterID);
     }
 
@@ -84,13 +90,15 @@ abstract class PhabricatorCursorPagedPolicyQuery
     if ($this->beforeID) {
       return qsprintf(
         $conn_r,
-        'ORDER BY %Q ASC',
-        $this->getPagingColumn());
+        'ORDER BY %Q %Q',
+        $this->getPagingColumn(),
+        $this->getReversePaging() ? 'DESC' : 'ASC');
     } else {
       return qsprintf(
         $conn_r,
-        'ORDER BY %Q DESC',
-        $this->getPagingColumn());
+        'ORDER BY %Q %Q',
+        $this->getPagingColumn(),
+        $this->getReversePaging() ? 'ASC' : 'DESC');
     }
   }