Move workboard "View as Query" workflow to a separate controller

Summary:
Depends on D20632. Ref T4900. As with other workflows on the board controller, this one is currently in the giant main "do everything" method. Move it to a separate controller.

This makes one material improvement: previously, we built the full board and did layout on all the cards before building the query. However, we do not actually need to do this: we don't need the cards. Instead, just do layout without handing over any card PHIDs. This is slightly faster, particularly on large boards.

Test Plan:
  - Clicked "View as Query" on a board, got a query page for the column.
  - Applied a custom filter, then clicked "View as Query" on a board. Got a query page merging the two filters.
  - Applied a custom filter, then clicked "Veiw as Query" on a board, in a subproject column. Got a query page merging the two filters, respecting the project-ness of the column.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T4900

Differential Revision: https://secure.phabricator.com/D20633

src/__phutil_library_map__.php

@@ -4198,6 +4198,7 @@ phutil_register_library_map(array(
     'PhabricatorProjectColumnTransactionQuery' => 'applications/project/query/PhabricatorProjectColumnTransactionQuery.php',
     'PhabricatorProjectColumnTransactionType' => 'applications/project/xaction/column/PhabricatorProjectColumnTransactionType.php',
     'PhabricatorProjectColumnTriggerTransaction' => 'applications/project/xaction/column/PhabricatorProjectColumnTriggerTransaction.php',
+    'PhabricatorProjectColumnViewQueryController' => 'applications/project/controller/PhabricatorProjectColumnViewQueryController.php',
     'PhabricatorProjectConfigOptions' => 'applications/project/config/PhabricatorProjectConfigOptions.php',
     'PhabricatorProjectConfiguredCustomField' => 'applications/project/customfield/PhabricatorProjectConfiguredCustomField.php',
     'PhabricatorProjectController' => 'applications/project/controller/PhabricatorProjectController.php',
@@ -10473,6 +10474,7 @@ phutil_register_library_map(array(
     'PhabricatorProjectColumnTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
     'PhabricatorProjectColumnTransactionType' => 'PhabricatorModularTransactionType',
     'PhabricatorProjectColumnTriggerTransaction' => 'PhabricatorProjectColumnTransactionType',
+    'PhabricatorProjectColumnViewQueryController' => 'PhabricatorProjectBoardController',
     'PhabricatorProjectConfigOptions' => 'PhabricatorApplicationConfigOptions',
     'PhabricatorProjectConfiguredCustomField' => array(
       'PhabricatorProjectStandardCustomField',

src/applications/project/application/PhabricatorProjectApplication.php

@@ -79,6 +79,8 @@ final class PhabricatorProjectApplication extends PhabricatorApplication {
             => 'PhabricatorProjectColumnHideController',
           'column/(?:(?P<id>\d+)/)?'
             => 'PhabricatorProjectColumnDetailController',
+          'viewquery/(?P<columnID>\d+)/'
+            => 'PhabricatorProjectColumnViewQueryController',
           'import/'
             => 'PhabricatorProjectBoardImportController',
           'reorder/'

src/applications/project/controller/PhabricatorProjectBoardViewController.php

@@ -122,46 +122,6 @@ final class PhabricatorProjectBoardViewController
         ->appendChild($content);
     }
 
-    // If the user wants to turn a particular column into a query, build an
-    // apropriate filter and redirect them to the query results page.
-    $query_column_id = $request->getInt('queryColumnID');
-    if ($query_column_id) {
-      $column_id_map = mpull($columns, null, 'getID');
-      $query_column = idx($column_id_map, $query_column_id);
-      if (!$query_column) {
-        return new Aphront404Response();
-      }
-
-      // Create a saved query to combine the active filter on the workboard
-      // with the column filter. If the user currently has constraints on the
-      // board, we want to add a new column or project constraint, not
-      // completely replace the constraints.
-      $saved_query = $saved->newCopy();
-
-      if ($query_column->getProxyPHID()) {
-        $project_phids = $saved_query->getParameter('projectPHIDs');
-        if (!$project_phids) {
-          $project_phids = array();
-        }
-        $project_phids[] = $query_column->getProxyPHID();
-        $saved_query->setParameter('projectPHIDs', $project_phids);
-      } else {
-        $saved_query->setParameter(
-          'columnPHIDs',
-          array($query_column->getPHID()));
-      }
-
-      $search_engine = id(new ManiphestTaskSearchEngine())
-        ->setViewer($viewer);
-      $search_engine->saveQuery($saved_query);
-
-      $query_key = $saved_query->getQueryKey();
-      $query_uri = new PhutilURI("/maniphest/query/{$query_key}/#R");
-
-      return id(new AphrontRedirectResponse())
-        ->setURI($query_uri);
-    }
-
     $task_can_edit_map = id(new PhabricatorPolicyFilter())
       ->setViewer($viewer)
       ->requireCapabilities(array(PhabricatorPolicyCapability::CAN_EDIT))
@@ -1004,6 +964,7 @@ final class PhabricatorProjectBoardViewController
 
     $request = $this->getRequest();
     $viewer = $request->getUser();
+    $state = $this->getViewState();
 
     $can_edit = PhabricatorPolicyFilter::hasCapability(
       $viewer,
@@ -1062,8 +1023,8 @@ final class PhabricatorProjectBoardViewController
       ->setHref($batch_move_uri)
       ->setWorkflow(true);
 
-    $query_uri = $request->getRequestURI();
-    $query_uri->replaceQueryParam('queryColumnID', $column->getID());
+    $query_uri = urisprintf('viewquery/%d/', $column->getID());
+    $query_uri = $state->newWorkboardURI($query_uri);
 
     $column_items[] = id(new PhabricatorActionView())
       ->setName(pht('View as Query'))

src/applications/project/controller/PhabricatorProjectColumnViewQueryController.php

@@ -0,0 +1,72 @@
+<?php
+
+final class PhabricatorProjectColumnViewQueryController
+  extends PhabricatorProjectBoardController {
+
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+
+    $response = $this->loadProject();
+    if ($response) {
+      return $response;
+    }
+
+    $project = $this->getProject();
+    $state = $this->getViewState();
+    $board_uri = $state->newWorkboardURI();
+
+    // NOTE: We're performing layout without handing the "LayoutEngine" any
+    // object PHIDs. We only want to get access to the column object the user
+    // is trying to query, so we do not need to actually position any cards on
+    // the board.
+
+    $board_phid = $project->getPHID();
+
+    $layout_engine = id(new PhabricatorBoardLayoutEngine())
+      ->setViewer($viewer)
+      ->setBoardPHIDs(array($board_phid))
+      ->setFetchAllBoards(true)
+      ->executeLayout();
+
+    $columns = $layout_engine->getColumns($board_phid);
+    $columns = mpull($columns, null, 'getID');
+
+    $column_id = $request->getURIData('columnID');
+    $column = idx($columns, $column_id);
+    if (!$column) {
+      return new Aphront404Response();
+    }
+
+    // Create a saved query to combine the active filter on the workboard
+    // with the column filter. If the user currently has constraints on the
+    // board, we want to add a new column or project constraint, not
+    // completely replace the constraints.
+    $default_query = $state->getSavedQuery();
+    $saved_query = $default_query->newCopy();
+
+    if ($column->getProxyPHID()) {
+      $project_phids = $saved_query->getParameter('projectPHIDs');
+      if (!$project_phids) {
+        $project_phids = array();
+      }
+      $project_phids[] = $column->getProxyPHID();
+      $saved_query->setParameter('projectPHIDs', $project_phids);
+    } else {
+      $saved_query->setParameter(
+        'columnPHIDs',
+        array($column->getPHID()));
+    }
+
+    $search_engine = id(new ManiphestTaskSearchEngine())
+      ->setViewer($viewer);
+
+    $search_engine->saveQuery($saved_query);
+
+    $query_key = $saved_query->getQueryKey();
+    $query_uri = new PhutilURI("/maniphest/query/{$query_key}/#R");
+
+    return id(new AphrontRedirectResponse())
+      ->setURI($query_uri);
+  }
+
+}