Give "Burndown" charts a more straightforward definition and move all the event stuff into "Activity" charts

Summary:
Depends on D20818. Ref T13279. The behavior of the "burndown" chart has wandered fairly far afield; make it look more like a burndown.

Move the other thing into an "Activity" chart.

Test Plan: {F6865207}

Maniphest Tasks: T13279

Differential Revision: https://secure.phabricator.com/D20819

src/__phutil_library_map__.php

@@ -4224,6 +4224,7 @@ phutil_register_library_map(array(
     'PhabricatorProfileMenuItemView' => 'applications/search/engine/PhabricatorProfileMenuItemView.php',
     'PhabricatorProfileMenuItemViewList' => 'applications/search/engine/PhabricatorProfileMenuItemViewList.php',
     'PhabricatorProject' => 'applications/project/storage/PhabricatorProject.php',
+    'PhabricatorProjectActivityChartEngine' => 'applications/project/chart/PhabricatorProjectActivityChartEngine.php',
     'PhabricatorProjectAddHeraldAction' => 'applications/project/herald/PhabricatorProjectAddHeraldAction.php',
     'PhabricatorProjectApplication' => 'applications/project/application/PhabricatorProjectApplication.php',
     'PhabricatorProjectArchiveController' => 'applications/project/controller/PhabricatorProjectArchiveController.php',
@@ -10733,6 +10734,7 @@ phutil_register_library_map(array(
       'PhabricatorSpacesInterface',
       'PhabricatorEditEngineSubtypeInterface',
     ),
+    'PhabricatorProjectActivityChartEngine' => 'PhabricatorChartEngine',
     'PhabricatorProjectAddHeraldAction' => 'PhabricatorProjectHeraldAction',
     'PhabricatorProjectApplication' => 'PhabricatorApplication',
     'PhabricatorProjectArchiveController' => 'PhabricatorProjectController',

src/applications/project/chart/PhabricatorProjectActivityChartEngine.php

@@ -0,0 +1,135 @@
+<?php
+
+final class PhabricatorProjectActivityChartEngine
+  extends PhabricatorChartEngine {
+
+  const CHARTENGINEKEY = 'project.activity';
+
+  public function setProjects(array $projects) {
+    assert_instances_of($projects, 'PhabricatorProject');
+    $project_phids = mpull($projects, 'getPHID');
+    return $this->setEngineParameter('projectPHIDs', $project_phids);
+  }
+
+  protected function newChart(PhabricatorFactChart $chart, array $map) {
+    $viewer = $this->getViewer();
+
+    $map = $map + array(
+      'projectPHIDs' => array(),
+    );
+
+    if ($map['projectPHIDs']) {
+      $projects = id(new PhabricatorProjectQuery())
+        ->setViewer($viewer)
+        ->withPHIDs($map['projectPHIDs'])
+        ->execute();
+      $project_phids = mpull($projects, 'getPHID');
+    } else {
+      $project_phids = array();
+    }
+
+    $project_phid = head($project_phids);
+
+    $functions = array();
+    $stacks = array();
+
+    $function = $this->newFunction(
+      array(
+        'accumulate',
+        array(
+          'compose',
+          array('fact', 'tasks.open-count.assign.project', $project_phid),
+          array('min', 0),
+        ),
+      ));
+
+    $function->getFunctionLabel()
+      ->setKey('moved-in')
+      ->setName(pht('Tasks Moved Into Project'))
+      ->setColor('rgba(128, 128, 200, 1)')
+      ->setFillColor('rgba(128, 128, 200, 0.15)');
+
+    $functions[] = $function;
+
+    $function = $this->newFunction(
+      array(
+        'accumulate',
+        array(
+          'compose',
+          array('fact', 'tasks.open-count.status.project', $project_phid),
+          array('min', 0),
+        ),
+      ));
+
+    $function->getFunctionLabel()
+      ->setKey('reopened')
+      ->setName(pht('Tasks Reopened'))
+      ->setColor('rgba(128, 128, 200, 1)')
+      ->setFillColor('rgba(128, 128, 200, 0.15)');
+
+    $functions[] = $function;
+
+    $function = $this->newFunction(
+      array(
+        'accumulate',
+        array('fact', 'tasks.open-count.create.project', $project_phid),
+      ));
+
+    $function->getFunctionLabel()
+      ->setKey('created')
+      ->setName(pht('Tasks Created'))
+      ->setColor('rgba(0, 0, 200, 1)')
+      ->setFillColor('rgba(0, 0, 200, 0.15)');
+
+    $functions[] = $function;
+
+    $function = $this->newFunction(
+      array(
+        'accumulate',
+        array(
+          'compose',
+          array('fact', 'tasks.open-count.status.project', $project_phid),
+          array('max', 0),
+        ),
+      ));
+
+    $function->getFunctionLabel()
+      ->setKey('closed')
+      ->setName(pht('Tasks Closed'))
+      ->setColor('rgba(0, 200, 0, 1)')
+      ->setFillColor('rgba(0, 200, 0, 0.15)');
+
+    $functions[] = $function;
+
+    $function = $this->newFunction(
+      array(
+        'accumulate',
+        array(
+          'compose',
+          array('fact', 'tasks.open-count.assign.project', $project_phid),
+          array('max', 0),
+        ),
+      ));
+
+    $function->getFunctionLabel()
+      ->setKey('moved-out')
+      ->setName(pht('Tasks Moved Out of Project'))
+      ->setColor('rgba(128, 200, 128, 1)')
+      ->setFillColor('rgba(128, 200, 128, 0.15)');
+
+    $functions[] = $function;
+
+    $stacks[] = array('created', 'reopened', 'moved-in');
+    $stacks[] = array('closed', 'moved-out');
+
+    $datasets = array();
+
+    $dataset = id(new PhabricatorChartStackedAreaDataset())
+      ->setFunctions($functions)
+      ->setStacks($stacks);
+
+    $datasets[] = $dataset;
+    $chart->attachDatasets($datasets);
+  }
+
+}

src/applications/project/chart/PhabricatorProjectBurndownChartEngine.php

@@ -29,140 +29,79 @@ final class PhabricatorProjectBurndownChartEngine
     }
 
     $functions = array();
-    $stacks = array();
-
     if ($project_phids) {
-      foreach ($project_phids as $project_phid) {
-        $function = $this->newFunction(
+      $open_function = $this->newFunction(
+        array(
+          'accumulate',
           array(
-            'accumulate',
-            array(
-              'compose',
-              array('fact', 'tasks.open-count.assign.project', $project_phid),
-              array('min', 0),
-            ),
-          ));
+            'sum',
+            $this->newFactSum(
+              'tasks.open-count.create.project', $project_phids),
+            $this->newFactSum(
+              'tasks.open-count.status.project', $project_phids),
+            $this->newFactSum(
+              'tasks.open-count.assign.project', $project_phids),
+          ),
+        ));
 
-        $function->getFunctionLabel()
-          ->setKey('moved-in')
-          ->setName(pht('Tasks Moved Into Project'))
-          ->setColor('rgba(128, 128, 200, 1)')
-          ->setFillColor('rgba(128, 128, 200, 0.15)');
-
-        $functions[] = $function;
-
-        $function = $this->newFunction(
-          array(
-            'accumulate',
-            array(
-              'compose',
-              array('fact', 'tasks.open-count.status.project', $project_phid),
-              array('min', 0),
-            ),
-          ));
-
-        $function->getFunctionLabel()
-          ->setKey('reopened')
-          ->setName(pht('Tasks Reopened'))
-          ->setColor('rgba(128, 128, 200, 1)')
-          ->setFillColor('rgba(128, 128, 200, 0.15)');
-
-        $functions[] = $function;
-
-        $function = $this->newFunction(
-          array(
-            'accumulate',
-            array('fact', 'tasks.open-count.create.project', $project_phid),
-          ));
-
-        $function->getFunctionLabel()
-          ->setKey('created')
-          ->setName(pht('Tasks Created'))
-          ->setColor('rgba(0, 0, 200, 1)')
-          ->setFillColor('rgba(0, 0, 200, 0.15)');
-
-        $functions[] = $function;
-
-        $function = $this->newFunction(
-          array(
-            'accumulate',
-            array(
-              'compose',
-              array('fact', 'tasks.open-count.status.project', $project_phid),
-              array('max', 0),
-            ),
-          ));
-
-        $function->getFunctionLabel()
-          ->setKey('closed')
-          ->setName(pht('Tasks Closed'))
-          ->setColor('rgba(0, 200, 0, 1)')
-          ->setFillColor('rgba(0, 200, 0, 0.15)');
-
-        $functions[] = $function;
-
-        $function = $this->newFunction(
-          array(
-            'accumulate',
-            array(
-              'compose',
-              array('fact', 'tasks.open-count.assign.project', $project_phid),
-              array('max', 0),
-            ),
-          ));
-
-        $function->getFunctionLabel()
-          ->setKey('moved-out')
-          ->setName(pht('Tasks Moved Out of Project'))
-          ->setColor('rgba(128, 200, 128, 1)')
-          ->setFillColor('rgba(128, 200, 128, 0.15)');
-
-        $functions[] = $function;
-
-        $stacks[] = array('created', 'reopened', 'moved-in');
-        $stacks[] = array('closed', 'moved-out');
-      }
+      $closed_function = $this->newFunction(
+        array(
+          'accumulate',
+          $this->newFactSum('tasks.open-count.status.project', $project_phids),
+        ));
     } else {
-      $function = $this->newFunction(
+      $open_function = $this->newFunction(
         array(
           'accumulate',
           array('fact', 'tasks.open-count.create'),
         ));
 
-      $function->getFunctionLabel()
-        ->setKey('open')
-        ->setName(pht('Open Tasks'))
-        ->setColor('rgba(0, 0, 200, 1)')
-        ->setFillColor('rgba(0, 0, 200, 0.15)');
-
-      $functions[] = $function;
-
-      $function = $this->newFunction(
+      $closed_function = $this->newFunction(
         array(
           'accumulate',
           array('fact', 'tasks.open-count.status'),
         ));
-
-      $function->getFunctionLabel()
-        ->setKey('closed')
-        ->setName(pht('Closed Tasks'))
-        ->setColor('rgba(0, 200, 0, 1)')
-        ->setFillColor('rgba(0, 200, 0, 0.15)');
-
-      $functions[] = $function;
     }
 
+    $open_function->getFunctionLabel()
+      ->setKey('open')
+      ->setName(pht('Open Tasks'))
+      ->setColor('rgba(0, 0, 200, 1)')
+      ->setFillColor('rgba(0, 0, 200, 0.15)');
+
+    $closed_function->getFunctionLabel()
+      ->setKey('closed')
+      ->setName(pht('Closed Tasks'))
+      ->setColor('rgba(0, 200, 0, 1)')
+      ->setFillColor('rgba(0, 200, 0, 0.15)');
+
     $datasets = array();
 
     $dataset = id(new PhabricatorChartStackedAreaDataset())
-      ->setFunctions($functions);
-
-    if ($stacks) {
-      $dataset->setStacks($stacks);
-    }
+      ->setFunctions(
+        array(
+          $open_function,
+          $closed_function,
+        ))
+      ->setStacks(
+        array(
+          array('open'),
+          array('closed'),
+        ));
 
     $datasets[] = $dataset;
     $chart->attachDatasets($datasets);
   }
 
+  private function newFactSum($fact_key, array $phids) {
+    $result = array();
+    $result[] = 'sum';
+
+    foreach ($phids as $phid) {
+      $result[] = array('fact', $fact_key, $phid);
+    }
+
+    return $result;
+  }
+
 }

src/applications/project/controller/PhabricatorProjectReportsController.php

@@ -44,10 +44,24 @@ final class PhabricatorProjectReportsController
       ->setParentPanelPHIDs(array())
       ->renderPanel();
 
+    $activity_panel = id(new PhabricatorProjectActivityChartEngine())
+      ->setViewer($viewer)
+      ->setProjects(array($project))
+      ->buildChartPanel();
+
+    $activity_panel->setName(pht('%s: Activity', $project->getName()));
+
+    $activity_view = id(new PhabricatorDashboardPanelRenderingEngine())
+      ->setViewer($viewer)
+      ->setPanel($activity_panel)
+      ->setParentPanelPHIDs(array())
+      ->renderPanel();
+
     $view = id(new PHUITwoColumnView())
       ->setFooter(
         array(
           $chart_view,
+          $activity_view,
         ));
 
     return $this->newPage()