Add "Group by Status" to Workboards

Summary:
Depends on D20276. Ref T10333. This one is a little bit rough/experimental, and I'm sort of curious what feedback we get about it. Weird stuff:

  - All statuses are always shown, even if the filter prevents tasks in that status from appearing (which is the default, since views are "Open Tasks" by default).
    - Pro: you can close tasks by dragging them to a closed status.
    - Con: lots of empty groups.
  - The "Duplicate" status is shown.
    - Pro: Shows closed duplicate tasks.
    - Con: Dragging tasks to "Duplicate" works, but is silly.
  - Since boards show "open tasks" by default, dragging stuff to a closed status and then reloading the board causes it to vanish. This is kind of how everything works, but more obvious/defaulted on "Status".

These issues might overwhelm its usefulness, but there isn't much cost to nuking it in the future if feedback is mostly negative/confused.

Test Plan: Grouped a workboard by status, dragged stuff around.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T10333

Differential Revision: https://secure.phabricator.com/D20277

src/__phutil_library_map__.php

@@ -4065,6 +4065,7 @@ phutil_register_library_map(array(
     'PhabricatorProjectColumnPriorityOrder' => 'applications/project/order/PhabricatorProjectColumnPriorityOrder.php',
     'PhabricatorProjectColumnQuery' => 'applications/project/query/PhabricatorProjectColumnQuery.php',
     'PhabricatorProjectColumnSearchEngine' => 'applications/project/query/PhabricatorProjectColumnSearchEngine.php',
+    'PhabricatorProjectColumnStatusOrder' => 'applications/project/order/PhabricatorProjectColumnStatusOrder.php',
     'PhabricatorProjectColumnTransaction' => 'applications/project/storage/PhabricatorProjectColumnTransaction.php',
     'PhabricatorProjectColumnTransactionEditor' => 'applications/project/editor/PhabricatorProjectColumnTransactionEditor.php',
     'PhabricatorProjectColumnTransactionQuery' => 'applications/project/query/PhabricatorProjectColumnTransactionQuery.php',
@@ -10155,6 +10156,7 @@ phutil_register_library_map(array(
     'PhabricatorProjectColumnPriorityOrder' => 'PhabricatorProjectColumnOrder',
     'PhabricatorProjectColumnQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PhabricatorProjectColumnSearchEngine' => 'PhabricatorApplicationSearchEngine',
+    'PhabricatorProjectColumnStatusOrder' => 'PhabricatorProjectColumnOrder',
     'PhabricatorProjectColumnTransaction' => 'PhabricatorApplicationTransaction',
     'PhabricatorProjectColumnTransactionEditor' => 'PhabricatorApplicationTransactionEditor',
     'PhabricatorProjectColumnTransactionQuery' => 'PhabricatorApplicationTransactionQuery',

src/applications/project/order/PhabricatorProjectColumnStatusOrder.php

@@ -0,0 +1,106 @@
+<?php
+
+final class PhabricatorProjectColumnStatusOrder
+  extends PhabricatorProjectColumnOrder {
+
+  const ORDERKEY = 'status';
+
+  public function getDisplayName() {
+    return pht('Group by Status');
+  }
+
+  protected function newMenuIconIcon() {
+    return 'fa-check';
+  }
+
+  public function getHasHeaders() {
+    return true;
+  }
+
+  public function getCanReorder() {
+    return true;
+  }
+
+  public function getMenuOrder() {
+    return 3000;
+  }
+
+  protected function newHeaderKeyForObject($object) {
+    return $this->newHeaderKeyForStatus($object->getStatus());
+  }
+
+  private function newHeaderKeyForStatus($status) {
+    return sprintf('status(%s)', $status);
+  }
+
+  protected function newSortVectorsForObjects(array $objects) {
+    $status_sequence = $this->newStatusSequence();
+
+    $vectors = array();
+    foreach ($objects as $object_key => $object) {
+      $vectors[$object_key] = array(
+        (int)idx($status_sequence, $object->getStatus(), 0),
+      );
+    }
+
+    return $vectors;
+  }
+
+  private function newStatusSequence() {
+    $statuses = ManiphestTaskStatus::getTaskStatusMap();
+    return array_combine(
+      array_keys($statuses),
+      range(1, count($statuses)));
+  }
+
+  protected function newHeadersForObjects(array $objects) {
+    $headers = array();
+
+    $statuses = ManiphestTaskStatus::getTaskStatusMap();
+    $sequence = $this->newStatusSequence();
+
+    foreach ($statuses as $status_key => $status_name) {
+      $header_key = $this->newHeaderKeyForStatus($status_key);
+
+      $sort_vector = array(
+        (int)idx($sequence, $status_key, 0),
+      );
+
+      $status_icon = ManiphestTaskStatus::getStatusIcon($status_key);
+      $status_color = ManiphestTaskStatus::getStatusColor($status_key);
+
+      $icon_view = id(new PHUIIconView())
+        ->setIcon($status_icon, $status_color);
+
+      $header = $this->newHeader()
+        ->setHeaderKey($header_key)
+        ->setSortVector($sort_vector)
+        ->setName($status_name)
+        ->setIcon($icon_view)
+        ->setEditProperties(
+          array(
+            'value' => $status_key,
+          ));
+
+      $headers[] = $header;
+    }
+
+    return $headers;
+  }
+
+  protected function newColumnTransactions($object, array $header) {
+    $new_status = idx($header, 'value');
+
+    if ($object->getStatus() === $new_status) {
+      return null;
+    }
+
+    $xactions = array();
+    $xactions[] = $this->newTransaction($object)
+      ->setTransactionType(ManiphestTaskStatusTransaction::TRANSACTIONTYPE)
+      ->setNewValue($new_status);
+
+    return $xactions;
+  }
+
+}