Add workboard link to emails about workboard changes

Summary: Fixes T4652, adding workboard link to emails

Test Plan: Move a task in a workboard from one column to another. Email notification should contain "WORKBOARD" section with link to that workboard

Reviewers: chad, epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Maniphest Tasks: T4652

Differential Revision: https://secure.phabricator.com/D10889

src/__phutil_library_map__.php

@@ -5312,6 +5312,7 @@ phutil_register_library_map(array(
       'PhabricatorRepositoryDAO',
       'PhabricatorPolicyInterface',
       'PhabricatorFlaggableInterface',
+      'PhabricatorProjectInterface',
       'PhabricatorTokenReceiverInterface',
       'PhabricatorSubscribableInterface',
       'PhabricatorMentionableInterface',

src/applications/maniphest/editor/ManiphestTransactionEditor.php

@@ -501,6 +501,34 @@ final class ManiphestTransactionEditor
       pht('TASK DETAIL'),
       PhabricatorEnv::getProductionURI('/T'.$object->getID()));
 
+
+    $board_phids = array();
+    $type_column = ManiphestTransaction::TYPE_PROJECT_COLUMN;
+    foreach ($xactions as $xaction) {
+      if ($xaction->getTransactionType() == $type_column) {
+        $new = $xaction->getNewValue();
+        $project_phid = idx($new, 'projectPHID');
+        if ($project_phid) {
+          $board_phids[] = $project_phid;
+        }
+      }
+    }
+
+    if ($board_phids) {
+      $projects = id(new PhabricatorProjectQuery())
+        ->setViewer($this->requireActor())
+        ->withPHIDs($board_phids)
+        ->execute();
+
+      foreach ($projects as $project) {
+        $body->addLinkSection(
+          pht('WORKBOARD'),
+          PhabricatorEnv::getProductionURI(
+            '/project/board/'.$project->getID().'/'));
+      }
+    }
+
+
     return $body;
   }