protected function saveComment(PhabricatorInlineCommentInterface $inline)
 {
     $inline->openTransaction();
     $inline->save();
     DifferentialDraft::markHasDraft($inline->getAuthorPHID(), $inline->getRevisionPHID(), $inline->getPHID());
     $inline->saveTransaction();
 }
 public function handleRequest(AphrontRequest $request)
 {
     $viewer = $this->getViewer();
     $id = $request->getURIData('id');
     $revision = id(new DifferentialRevisionQuery())->setViewer($viewer)->withIDs(array($id))->executeOne();
     if (!$revision) {
         return new Aphront404Response();
     }
     $type_comment = PhabricatorTransactions::TYPE_COMMENT;
     $type_action = DifferentialTransaction::TYPE_ACTION;
     $type_edge = PhabricatorTransactions::TYPE_EDGE;
     $type_subscribers = PhabricatorTransactions::TYPE_SUBSCRIBERS;
     $xactions = array();
     $action = $request->getStr('action');
     switch ($action) {
         case DifferentialAction::ACTION_COMMENT:
         case DifferentialAction::ACTION_ADDREVIEWERS:
         case DifferentialAction::ACTION_ADDCCS:
             break;
         default:
             $xactions[] = id(new DifferentialTransaction())->setTransactionType($type_action)->setNewValue($action);
             break;
     }
     $edge_reviewer = DifferentialRevisionHasReviewerEdgeType::EDGECONST;
     $reviewers = $request->getStrList('reviewers');
     if (DifferentialAction::allowReviewers($action) && $reviewers) {
         $faux_edges = array();
         foreach ($reviewers as $phid) {
             $faux_edges[$phid] = array('src' => $revision->getPHID(), 'type' => $edge_reviewer, 'dst' => $phid);
         }
         $xactions[] = id(new DifferentialTransaction())->setTransactionType($type_edge)->setMetadataValue('edge:type', $edge_reviewer)->setOldValue(array())->setNewValue($faux_edges);
     }
     $ccs = $request->getStrList('ccs');
     if ($ccs) {
         $xactions[] = id(new DifferentialTransaction())->setTransactionType($type_subscribers)->setOldValue(array())->setNewValue(array_fuse($ccs));
     }
     // Add a comment transaction if there's nothing, so we'll generate a
     // nonempty result.
     if (strlen($request->getStr('content')) || !$xactions) {
         $xactions[] = id(new DifferentialTransaction())->setTransactionType($type_comment)->attachComment(id(new ManiphestTransactionComment())->setContent($request->getStr('content')));
     }
     foreach ($xactions as $xaction) {
         $xaction->setAuthorPHID($viewer->getPHID());
     }
     $engine = new PhabricatorMarkupEngine();
     $engine->setViewer($request->getUser());
     foreach ($xactions as $xaction) {
         if ($xaction->hasComment()) {
             $engine->addObject($xaction->getComment(), PhabricatorApplicationTransactionComment::MARKUP_FIELD_COMMENT);
         }
     }
     $engine->process();
     $phids = mpull($xactions, 'getRequiredHandlePHIDs');
     $phids = array_mergev($phids);
     $handles = id(new PhabricatorHandleQuery())->setViewer($viewer)->withPHIDs($phids)->execute();
     foreach ($xactions as $xaction) {
         $xaction->setHandles($handles);
     }
     $view = id(new DifferentialTransactionView())->setUser($viewer)->setTransactions($xactions)->setIsPreview(true);
     $metadata = array('reviewers' => $reviewers, 'ccs' => $ccs);
     if ($action != DifferentialAction::ACTION_COMMENT) {
         $metadata['action'] = $action;
     }
     $draft_key = 'differential-comment-' . $id;
     $draft = id(new PhabricatorDraft())->setAuthorPHID($viewer->getPHID())->setDraftKey($draft_key)->setDraft($request->getStr('content'))->setMetadata($metadata)->replaceOrDelete();
     if ($draft->isDeleted()) {
         DifferentialDraft::deleteHasDraft($viewer->getPHID(), $revision->getPHID(), $draft_key);
     } else {
         DifferentialDraft::markHasDraft($viewer->getPHID(), $revision->getPHID(), $draft_key);
     }
     return id(new AphrontAjaxResponse())->setContent((string) phutil_implode_html('', $view->buildEvents()));
 }