public function save()
 {
     $revision = $this->getRevision();
     $is_new = $this->isNewRevision();
     if ($is_new) {
         $this->initializeNewRevision($revision);
     }
     $revision->loadRelationships();
     $this->willWriteRevision();
     if ($this->reviewers === null) {
         $this->reviewers = $revision->getReviewers();
     }
     if ($this->cc === null) {
         $this->cc = $revision->getCCPHIDs();
     }
     $diff = $this->getDiff();
     if ($diff) {
         $revision->setLineCount($diff->getLineCount());
     }
     // Save the revision, to generate its ID and PHID if it is new. We need
     // the ID/PHID in order to record them in Herald transcripts, but don't
     // want to hold a transaction open while running Herald because it is
     // potentially somewhat slow. The downside is that we may end up with a
     // saved revision/diff pair without appropriate CCs. We could be better
     // about this -- for example:
     //
     //  - Herald can't affect reviewers, so we could compute them before
     //    opening the transaction and then save them in the transaction.
     //  - Herald doesn't *really* need PHIDs to compute its effects, we could
     //    run it before saving these objects and then hand over the PHIDs later.
     //
     // But this should address the problem of orphaned revisions, which is
     // currently the only problem we experience in practice.
     $revision->openTransaction();
     if ($diff) {
         $revision->setBranchName($diff->getBranch());
         $revision->setArcanistProjectPHID($diff->getArcanistProjectPHID());
     }
     $revision->save();
     if ($diff) {
         $diff->setRevisionID($revision->getID());
         $diff->save();
     }
     $revision->saveTransaction();
     // We're going to build up three dictionaries: $add, $rem, and $stable. The
     // $add dictionary has added reviewers/CCs. The $rem dictionary has
     // reviewers/CCs who have been removed, and the $stable array is
     // reviewers/CCs who haven't changed. We're going to send new reviewers/CCs
     // a different ("welcome") email than we send stable reviewers/CCs.
     $old = array('rev' => array_fill_keys($revision->getReviewers(), true), 'ccs' => array_fill_keys($revision->getCCPHIDs(), true));
     $xscript_header = null;
     $xscript_uri = null;
     $new = array('rev' => array_fill_keys($this->reviewers, true), 'ccs' => array_fill_keys($this->cc, true));
     $rem_ccs = array();
     $xscript_phid = null;
     if ($diff) {
         $adapter = new HeraldDifferentialRevisionAdapter($revision, $diff);
         $adapter->setExplicitCCs($new['ccs']);
         $adapter->setExplicitReviewers($new['rev']);
         $adapter->setForbiddenCCs($revision->getUnsubscribedPHIDs());
         $xscript = HeraldEngine::loadAndApplyRules($adapter);
         $xscript_uri = '/herald/transcript/' . $xscript->getID() . '/';
         $xscript_phid = $xscript->getPHID();
         $xscript_header = $xscript->getXHeraldRulesHeader();
         $xscript_header = HeraldTranscript::saveXHeraldRulesHeader($revision->getPHID(), $xscript_header);
         $sub = array('rev' => array(), 'ccs' => $adapter->getCCsAddedByHerald());
         $rem_ccs = $adapter->getCCsRemovedByHerald();
     } else {
         $sub = array('rev' => array(), 'ccs' => array());
     }
     // Remove any CCs which are prevented by Herald rules.
     $sub['ccs'] = array_diff_key($sub['ccs'], $rem_ccs);
     $new['ccs'] = array_diff_key($new['ccs'], $rem_ccs);
     $add = array();
     $rem = array();
     $stable = array();
     foreach (array('rev', 'ccs') as $key) {
         $add[$key] = array();
         if ($new[$key] !== null) {
             $add[$key] += array_diff_key($new[$key], $old[$key]);
         }
         $add[$key] += array_diff_key($sub[$key], $old[$key]);
         $combined = $sub[$key];
         if ($new[$key] !== null) {
             $combined += $new[$key];
         }
         $rem[$key] = array_diff_key($old[$key], $combined);
         $stable[$key] = array_diff_key($old[$key], $add[$key] + $rem[$key]);
     }
     self::alterReviewers($revision, $this->reviewers, array_keys($rem['rev']), array_keys($add['rev']), $this->actorPHID);
     // We want to attribute new CCs to a "reasonPHID", representing the reason
     // they were added. This is either a user (if some user explicitly CCs
     // them, or uses "Add CCs...") or a Herald transcript PHID, indicating that
     // they were added by a Herald rule.
     if ($add['ccs'] || $rem['ccs']) {
         $reasons = array();
         foreach ($add['ccs'] as $phid => $ignored) {
             if (empty($new['ccs'][$phid])) {
                 $reasons[$phid] = $xscript_phid;
             } else {
                 $reasons[$phid] = $this->actorPHID;
             }
         }
         foreach ($rem['ccs'] as $phid => $ignored) {
             if (empty($new['ccs'][$phid])) {
                 $reasons[$phid] = $this->actorPHID;
             } else {
                 $reasons[$phid] = $xscript_phid;
             }
         }
     } else {
         $reasons = $this->actorPHID;
     }
     self::alterCCs($revision, $this->cc, array_keys($rem['ccs']), array_keys($add['ccs']), $reasons);
     $this->updateAuxiliaryFields();
     // Add the author and users included from Herald rules to the relevant set
     // of users so they get a copy of the email.
     if (!$this->silentUpdate) {
         if ($is_new) {
             $add['rev'][$this->getActorPHID()] = true;
             if ($diff) {
                 $add['rev'] += $adapter->getEmailPHIDsAddedByHerald();
             }
         } else {
             $stable['rev'][$this->getActorPHID()] = true;
             if ($diff) {
                 $stable['rev'] += $adapter->getEmailPHIDsAddedByHerald();
             }
         }
     }
     $mail = array();
     $phids = array($this->getActorPHID());
     $handles = id(new PhabricatorObjectHandleData($phids))->loadHandles();
     $actor_handle = $handles[$this->getActorPHID()];
     $changesets = null;
     $comment = null;
     if ($diff) {
         $changesets = $diff->loadChangesets();
         // TODO: This should probably be in DifferentialFeedbackEditor?
         if (!$is_new) {
             $comment = $this->createComment();
         }
         if ($comment) {
             $mail[] = id(new DifferentialNewDiffMail($revision, $actor_handle, $changesets))->setIsFirstMailAboutRevision($is_new)->setIsFirstMailToRecipients($is_new)->setComments($this->getComments())->setToPHIDs(array_keys($stable['rev']))->setCCPHIDs(array_keys($stable['ccs']));
         }
         // Save the changes we made above.
         $diff->setDescription(preg_replace('/\\n.*/s', '', $this->getComments()));
         $diff->save();
         $this->updateAffectedPathTable($revision, $diff, $changesets);
         $this->updateRevisionHashTable($revision, $diff);
         // An updated diff should require review, as long as it's not closed
         // or accepted. The "accepted" status is "sticky" to encourage courtesy
         // re-diffs after someone accepts with minor changes/suggestions.
         $status = $revision->getStatus();
         if ($status != ArcanistDifferentialRevisionStatus::CLOSED && $status != ArcanistDifferentialRevisionStatus::ACCEPTED) {
             $revision->setStatus(ArcanistDifferentialRevisionStatus::NEEDS_REVIEW);
         }
     } else {
         $diff = $revision->loadActiveDiff();
         if ($diff) {
             $changesets = $diff->loadChangesets();
         } else {
             $changesets = array();
         }
     }
     $revision->save();
     $this->didWriteRevision();
     $event_data = array('revision_id' => $revision->getID(), 'revision_phid' => $revision->getPHID(), 'revision_name' => $revision->getTitle(), 'revision_author_phid' => $revision->getAuthorPHID(), 'action' => $is_new ? DifferentialAction::ACTION_CREATE : DifferentialAction::ACTION_UPDATE, 'feedback_content' => $is_new ? phutil_utf8_shorten($revision->getSummary(), 140) : $this->getComments(), 'actor_phid' => $revision->getAuthorPHID());
     id(new PhabricatorTimelineEvent('difx', $event_data))->recordEvent();
     id(new PhabricatorFeedStoryPublisher())->setStoryType(PhabricatorFeedStoryTypeConstants::STORY_DIFFERENTIAL)->setStoryData($event_data)->setStoryTime(time())->setStoryAuthorPHID($revision->getAuthorPHID())->setRelatedPHIDs(array($revision->getPHID(), $revision->getAuthorPHID()))->setPrimaryObjectPHID($revision->getPHID())->setSubscribedPHIDs(array_merge(array($revision->getAuthorPHID()), $revision->getReviewers(), $revision->getCCPHIDs()))->publish();
     //  TODO: Move this into a worker task thing.
     PhabricatorSearchDifferentialIndexer::indexRevision($revision);
     if ($this->silentUpdate) {
         return;
     }
     $revision->loadRelationships();
     if ($add['rev']) {
         $message = id(new DifferentialNewDiffMail($revision, $actor_handle, $changesets))->setIsFirstMailAboutRevision($is_new)->setIsFirstMailToRecipients(true)->setToPHIDs(array_keys($add['rev']));
         if ($is_new) {
             // The first time we send an email about a revision, put the CCs in
             // the "CC:" field of the same "Review Requested" email that reviewers
             // get, so you don't get two initial emails if you're on a list that
             // is CC'd.
             $message->setCCPHIDs(array_keys($add['ccs']));
         }
         $mail[] = $message;
     }
     // If we added CCs, we want to send them an email, but only if they were not
     // already a reviewer and were not added as one (in these cases, they got
     // a "NewDiff" mail, either in the past or just a moment ago). You can still
     // get two emails, but only if a revision is updated and you are added as a
     // reviewer at the same time a list you are on is added as a CC, which is
     // rare and reasonable.
     $implied_ccs = self::getImpliedCCs($revision);
     $implied_ccs = array_fill_keys($implied_ccs, true);
     $add['ccs'] = array_diff_key($add['ccs'], $implied_ccs);
     if (!$is_new && $add['ccs']) {
         $mail[] = id(new DifferentialCCWelcomeMail($revision, $actor_handle, $changesets))->setIsFirstMailToRecipients(true)->setToPHIDs(array_keys($add['ccs']));
     }
     foreach ($mail as $message) {
         $message->setHeraldTranscriptURI($xscript_uri);
         $message->setXHeraldRulesHeader($xscript_header);
         $message->send();
     }
 }
 public function save()
 {
     $revision = $this->getRevision();
     // TODO
     //    $revision->openTransaction();
     $is_new = $this->isNewRevision();
     if ($is_new) {
         // These fields aren't nullable; set them to sensible defaults if they
         // haven't been configured. We're just doing this so we can generate an
         // ID for the revision if we don't have one already.
         $revision->setLineCount(0);
         if ($revision->getStatus() === null) {
             $revision->setStatus(DifferentialRevisionStatus::NEEDS_REVIEW);
         }
         if ($revision->getTitle() === null) {
             $revision->setTitle('Untitled Revision');
         }
         if ($revision->getAuthorPHID() === null) {
             $revision->setAuthorPHID($this->getActorPHID());
         }
         if ($revision->getSummary() === null) {
             $revision->setSummary('');
         }
         if ($revision->getTestPlan() === null) {
             $revision->setTestPlan('');
         }
         $revision->save();
     }
     $revision->loadRelationships();
     $this->willWriteRevision();
     if ($this->reviewers === null) {
         $this->reviewers = $revision->getReviewers();
     }
     if ($this->cc === null) {
         $this->cc = $revision->getCCPHIDs();
     }
     // We're going to build up three dictionaries: $add, $rem, and $stable. The
     // $add dictionary has added reviewers/CCs. The $rem dictionary has
     // reviewers/CCs who have been removed, and the $stable array is
     // reviewers/CCs who haven't changed. We're going to send new reviewers/CCs
     // a different ("welcome") email than we send stable reviewers/CCs.
     $old = array('rev' => array_fill_keys($revision->getReviewers(), true), 'ccs' => array_fill_keys($revision->getCCPHIDs(), true));
     $diff = $this->getDiff();
     $xscript_header = null;
     $xscript_uri = null;
     $new = array('rev' => array_fill_keys($this->reviewers, true), 'ccs' => array_fill_keys($this->cc, true));
     $rem_ccs = array();
     if ($diff) {
         $diff->setRevisionID($revision->getID());
         $revision->setLineCount($diff->getLineCount());
         $adapter = new HeraldDifferentialRevisionAdapter($revision, $diff);
         $adapter->setExplicitCCs($new['ccs']);
         $adapter->setExplicitReviewers($new['rev']);
         $adapter->setForbiddenCCs($revision->getUnsubscribedPHIDs());
         $xscript = HeraldEngine::loadAndApplyRules($adapter);
         $xscript_uri = PhabricatorEnv::getProductionURI('/herald/transcript/' . $xscript->getID() . '/');
         $xscript_phid = $xscript->getPHID();
         $xscript_header = $xscript->getXHeraldRulesHeader();
         $xscript_header = HeraldTranscript::saveXHeraldRulesHeader($revision->getPHID(), $xscript_header);
         $sub = array('rev' => array(), 'ccs' => $adapter->getCCsAddedByHerald());
         $rem_ccs = $adapter->getCCsRemovedByHerald();
     } else {
         $sub = array('rev' => array(), 'ccs' => array());
     }
     // Remove any CCs which are prevented by Herald rules.
     $sub['ccs'] = array_diff_key($sub['ccs'], $rem_ccs);
     $new['ccs'] = array_diff_key($new['ccs'], $rem_ccs);
     $add = array();
     $rem = array();
     $stable = array();
     foreach (array('rev', 'ccs') as $key) {
         $add[$key] = array();
         if ($new[$key] !== null) {
             $add[$key] += array_diff_key($new[$key], $old[$key]);
         }
         $add[$key] += array_diff_key($sub[$key], $old[$key]);
         $combined = $sub[$key];
         if ($new[$key] !== null) {
             $combined += $new[$key];
         }
         $rem[$key] = array_diff_key($old[$key], $combined);
         $stable[$key] = array_diff_key($old[$key], $add[$key] + $rem[$key]);
     }
     self::alterReviewers($revision, $this->reviewers, array_keys($rem['rev']), array_keys($add['rev']), $this->actorPHID);
     /*
     
         // TODO: When Herald is brought over, run through this stuff to figure
         // out which adds are Herald's fault.
     
         // TODO: Still need to do this.
     
         if ($add['ccs'] || $rem['ccs']) {
           foreach (array_keys($add['ccs']) as $id) {
             if (empty($new['ccs'][$id])) {
               $reason_phid = 'TODO';//$xscript_phid;
             } else {
               $reason_phid = $this->getActorPHID();
             }
           }
           foreach (array_keys($rem['ccs']) as $id) {
             if (empty($new['ccs'][$id])) {
               $reason_phid = $this->getActorPHID();
             } else {
               $reason_phid = 'TODO';//$xscript_phid;
             }
           }
         }
     */
     self::alterCCs($revision, $this->cc, array_keys($rem['ccs']), array_keys($add['ccs']), $this->actorPHID);
     $this->updateAuxiliaryFields();
     // Add the author and users included from Herald rules to the relevant set
     // of users so they get a copy of the email.
     if (!$this->silentUpdate) {
         if ($is_new) {
             $add['rev'][$this->getActorPHID()] = true;
             if ($diff) {
                 $add['rev'] += $adapter->getEmailPHIDsAddedByHerald();
             }
         } else {
             $stable['rev'][$this->getActorPHID()] = true;
             if ($diff) {
                 $stable['rev'] += $adapter->getEmailPHIDsAddedByHerald();
             }
         }
     }
     $mail = array();
     $phids = array($this->getActorPHID());
     $handles = id(new PhabricatorObjectHandleData($phids))->loadHandles();
     $actor_handle = $handles[$this->getActorPHID()];
     $changesets = null;
     $comment = null;
     if ($diff) {
         $changesets = $diff->loadChangesets();
         // TODO: This should probably be in DifferentialFeedbackEditor?
         if (!$is_new) {
             $comment = $this->createComment();
         }
         if ($comment) {
             $mail[] = id(new DifferentialNewDiffMail($revision, $actor_handle, $changesets))->setIsFirstMailAboutRevision($is_new)->setIsFirstMailToRecipients($is_new)->setComments($this->getComments())->setToPHIDs(array_keys($stable['rev']))->setCCPHIDs(array_keys($stable['ccs']));
         }
         // Save the changes we made above.
         $diff->setDescription(substr($this->getComments(), 0, 80));
         $diff->save();
         // An updated diff should require review, as long as it's not committed
         // or accepted. The "accepted" status is "sticky" to encourage courtesy
         // re-diffs after someone accepts with minor changes/suggestions.
         $status = $revision->getStatus();
         if ($status != DifferentialRevisionStatus::COMMITTED && $status != DifferentialRevisionStatus::ACCEPTED) {
             $revision->setStatus(DifferentialRevisionStatus::NEEDS_REVIEW);
         }
     } else {
         $diff = $revision->loadActiveDiff();
         if ($diff) {
             $changesets = $diff->loadChangesets();
         } else {
             $changesets = array();
         }
     }
     $revision->save();
     $this->didWriteRevision();
     $event_data = array('revision_id' => $revision->getID(), 'revision_phid' => $revision->getPHID(), 'revision_name' => $revision->getTitle(), 'revision_author_phid' => $revision->getAuthorPHID(), 'action' => $is_new ? DifferentialAction::ACTION_CREATE : DifferentialAction::ACTION_UPDATE, 'feedback_content' => $is_new ? phutil_utf8_shorten($revision->getSummary(), 140) : $this->getComments(), 'actor_phid' => $revision->getAuthorPHID());
     id(new PhabricatorTimelineEvent('difx', $event_data))->recordEvent();
     id(new PhabricatorFeedStoryPublisher())->setStoryType(PhabricatorFeedStoryTypeConstants::STORY_DIFFERENTIAL)->setStoryData($event_data)->setStoryTime(time())->setStoryAuthorPHID($revision->getAuthorPHID())->setRelatedPHIDs(array($revision->getPHID(), $revision->getAuthorPHID()))->publish();
     // TODO
     //    $revision->saveTransaction();
     //  TODO: Move this into a worker task thing.
     PhabricatorSearchDifferentialIndexer::indexRevision($revision);
     if ($this->silentUpdate) {
         return;
     }
     $revision->loadRelationships();
     if ($add['rev']) {
         $message = id(new DifferentialNewDiffMail($revision, $actor_handle, $changesets))->setIsFirstMailAboutRevision($is_new)->setIsFirstMailToRecipients(true)->setToPHIDs(array_keys($add['rev']));
         if ($is_new) {
             // The first time we send an email about a revision, put the CCs in
             // the "CC:" field of the same "Review Requested" email that reviewers
             // get, so you don't get two initial emails if you're on a list that
             // is CC'd.
             $message->setCCPHIDs(array_keys($add['ccs']));
         }
         $mail[] = $message;
     }
     // If you were added as a reviewer and a CC, just give you the reviewer
     // email. We could go to greater lengths to prevent this, but there's
     // bunch of stuff with list subscriptions anyway. You can still get two
     // emails, but only if a revision is updated and you are added as a reviewer
     // at the same time a list you are on is added as a CC, which is rare and
     // reasonable.
     $add['ccs'] = array_diff_key($add['ccs'], $add['rev']);
     if (!$is_new && $add['ccs']) {
         $mail[] = id(new DifferentialCCWelcomeMail($revision, $actor_handle, $changesets))->setIsFirstMailToRecipients(true)->setToPHIDs(array_keys($add['ccs']));
     }
     foreach ($mail as $message) {
         $message->setHeraldTranscriptURI($xscript_uri);
         $message->setXHeraldRulesHeader($xscript_header);
         $message->send();
     }
 }