Dispatch Differential edit events from Editor, not Controller

Summary:
Currently, these events don't fire for Conduit updates, which makes them sort of silly.

This will get proper treatment after T2222.

Test Plan: Installed a `throw new Exception(...)` event listener. Performed Conduit and web updates of revisions, saw event listener fire.

Reviewers: btrahan, guywarner

Reviewed By: guywarner

CC: aran

Differential Revision: https://secure.phabricator.com/D7004

src/applications/differential/controller/DifferentialRevisionEditController.php

@@ -67,35 +67,15 @@ final class DifferentialRevisionEditController extends DifferentialController {
         $is_new = !$revision->getID();
         $user = $request->getUser();
 
-        $event = new PhabricatorEvent(
-          PhabricatorEventType::TYPE_DIFFERENTIAL_WILLEDITREVISION,
-            array(
-              'revision'      => $revision,
-              'new'           => $is_new,
-            ));
-
-        $event->setUser($user);
-        $event->setAphrontRequest($request);
-        PhutilEventEngine::dispatchEvent($event);
-
         $editor = new DifferentialRevisionEditor($revision);
         $editor->setActor($request->getUser());
         if ($diff) {
           $editor->addDiff($diff, $request->getStr('comments'));
         }
         $editor->setAuxiliaryFields($aux_fields);
+        $editor->setAphrontRequestForEventDispatch($request);
         $editor->save();
 
-        $event = new PhabricatorEvent(
-          PhabricatorEventType::TYPE_DIFFERENTIAL_DIDEDITREVISION,
-            array(
-              'revision'      => $revision,
-              'new'           => $is_new,
-            ));
-        $event->setUser($user);
-        $event->setAphrontRequest($request);
-        PhutilEventEngine::dispatchEvent($event);
-
         return id(new AphrontRedirectResponse())
           ->setURI('/D'.$revision->getID());
       }

src/applications/differential/editor/DifferentialRevisionEditor.php

@@ -17,9 +17,22 @@ final class DifferentialRevisionEditor extends PhabricatorEditor {
 
   private $auxiliaryFields = array();
   private $contentSource;
+  private $isCreate;
+  private $aphrontRequestForEventDispatch;
+
+
+  public function setAphrontRequestForEventDispatch(AphrontRequest $request) {
+    $this->aphrontRequestForEventDispatch = $request;
+    return $this;
+  }
+
+  public function getAphrontRequestForEventDispatch() {
+    return $this->aphrontRequestForEventDispatch;
+  }
 
   public function __construct(DifferentialRevision $revision) {
     $this->revision = $revision;
+    $this->isCreate = !($revision->getID());
   }
 
   public static function newRevisionFromConduitWithDiff(
@@ -844,12 +857,36 @@ final class DifferentialRevisionEditor extends PhabricatorEditor {
     foreach ($this->auxiliaryFields as $aux_field) {
       $aux_field->willWriteRevision($this);
     }
+
+    $this->dispatchEvent(
+      PhabricatorEventType::TYPE_DIFFERENTIAL_WILLEDITREVISION);
   }
 
   private function didWriteRevision() {
     foreach ($this->auxiliaryFields as $aux_field) {
       $aux_field->didWriteRevision($this);
     }
+
+    $this->dispatchEvent(
+      PhabricatorEventType::TYPE_DIFFERENTIAL_DIDEDITREVISION);
+  }
+
+  private function dispatchEvent($type) {
+    $event = new PhabricatorEvent(
+      $type,
+      array(
+        'revision'      => $this->revision,
+        'new'           => $this->isCreate,
+      ));
+
+    $event->setUser($this->getActor());
+
+    $request = $this->getAphrontRequestForEventDispatch();
+    if ($request) {
+      $event->setAphrontRequest($request);
+    }
+
+    PhutilEventEngine::dispatchEvent($event);
   }
 
   /**

src/applications/differential/field/specification/DifferentialJIRAIssuesFieldSpecification.php

@@ -38,7 +38,7 @@ final class DifferentialJIRAIssuesFieldSpecification
       ->setCaption(
         pht('Example: %s', phutil_tag('tt', array(), 'JIS-3, JIS-9')))
       ->setName($this->getStorageKey())
-      ->setValue(implode(', ', $this->value))
+      ->setValue(implode(', ', nonempty($this->value, array())))
       ->setError($this->error);
   }