Herald support for changing task status

Summary:
Ref T7848. This patch is incomplete and has the following issues:

 - Multiple statuses can be entered on the edit rule page (only the first one is used).
 - Statuses are not rendered correctly when re-editing a rule.

Test Plan: Applied to our local phab instance and verified it works with our task workflow.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: joshuaspence, revi, epriestley, jsmith

Maniphest Tasks: T7848

Differential Revision: https://secure.phabricator.com/D14359

src/__phutil_library_map__.php

@@ -1321,6 +1321,7 @@ phutil_register_library_map(array(
     'ManiphestTaskStatus' => 'applications/maniphest/constants/ManiphestTaskStatus.php',
     'ManiphestTaskStatusDatasource' => 'applications/maniphest/typeahead/ManiphestTaskStatusDatasource.php',
     'ManiphestTaskStatusFunctionDatasource' => 'applications/maniphest/typeahead/ManiphestTaskStatusFunctionDatasource.php',
+    'ManiphestTaskStatusHeraldAction' => 'applications/maniphest/herald/ManiphestTaskStatusHeraldAction.php',
     'ManiphestTaskStatusHeraldField' => 'applications/maniphest/herald/ManiphestTaskStatusHeraldField.php',
     'ManiphestTaskStatusTestCase' => 'applications/maniphest/constants/__tests__/ManiphestTaskStatusTestCase.php',
     'ManiphestTaskTestCase' => 'applications/maniphest/__tests__/ManiphestTaskTestCase.php',
@@ -5313,6 +5314,7 @@ phutil_register_library_map(array(
     'ManiphestTaskStatus' => 'ManiphestConstants',
     'ManiphestTaskStatusDatasource' => 'PhabricatorTypeaheadDatasource',
     'ManiphestTaskStatusFunctionDatasource' => 'PhabricatorTypeaheadCompositeDatasource',
+    'ManiphestTaskStatusHeraldAction' => 'HeraldAction',
     'ManiphestTaskStatusHeraldField' => 'ManiphestTaskHeraldField',
     'ManiphestTaskStatusTestCase' => 'PhabricatorTestCase',
     'ManiphestTaskTestCase' => 'PhabricatorTestCase',

src/applications/maniphest/herald/ManiphestTaskStatusHeraldAction.php

@@ -0,0 +1,87 @@
+<?php
+
+final class ManiphestTaskStatusHeraldAction
+  extends HeraldAction {
+
+  const ACTIONCONST = 'maniphest.status';
+  const DO_STATUS = 'do.status';
+
+  public function supportsObject($object) {
+    return ($object instanceof ManiphestTask);
+  }
+
+  public function getActionGroupKey() {
+    return HeraldApplicationActionGroup::ACTIONGROUPKEY;
+  }
+
+  public function getHeraldActionName() {
+    return pht('Change status to');
+  }
+
+  public function supportsRuleType($rule_type) {
+    return ($rule_type != HeraldRuleTypeConfig::RULE_TYPE_PERSONAL);
+  }
+
+  public function applyEffect($object, HeraldEffect $effect) {
+    $status = head($effect->getTarget());
+
+    if (!$status) {
+      $this->logEffect(self::DO_STANDARD_EMPTY);
+      return;
+    }
+
+    $adapter = $this->getAdapter();
+    $object = $adapter->getObject();
+    $current = $object->getStatus();
+
+    if ($current == $status) {
+      $this->logEffect(self::DO_STANDARD_NO_EFFECT, $status);
+      return;
+    }
+
+    $xaction = $adapter->newTransaction()
+      ->setTransactionType(ManiphestTransaction::TYPE_STATUS)
+      ->setNewValue($status);
+
+    $adapter->queueTransaction($xaction);
+    $this->logEffect(self::DO_STATUS, $status);
+  }
+
+  public function getHeraldActionStandardType() {
+    return self::STANDARD_PHID_LIST;
+  }
+
+  public function renderActionDescription($value) {
+    $status = head($value);
+    $name = ManiphestTaskStatus::getTaskStatusName($status);
+    return pht('Change status to: %s.', $name);
+  }
+
+  protected function getDatasource() {
+    return new ManiphestTaskStatusDatasource();
+  }
+
+  protected function getDatasourceValueMap() {
+    return ManiphestTaskStatus::getTaskStatusMap();
+  }
+
+  protected function getActionEffectMap() {
+    return array(
+      self::DO_STATUS => array(
+        'icon' => 'fa-pencil',
+        'color' => 'green',
+        'name' => pht('Changed Task Status'),
+      ),
+    );
+  }
+
+  protected function renderActionEffectDescription($type, $data) {
+    switch ($type) {
+      case self::DO_STATUS:
+        return pht(
+          'Changed task status to "%s".',
+          ManiphestTaskStatus::getTaskStatusName($data));
+    }
+  }
+
+}