Revert rP87c60abbd02d, apply D1772

Test Plan:
Apply SQL patch.
Visit /differential/.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1781

resources/sql/patches/113.lastreviewer.sql

@@ -0,0 +1,12 @@
+ALTER TABLE `phabricator_differential`.`differential_revision`
+  ADD `lastReviewerPHID` varchar(64) BINARY AFTER `authorPHID`;
+
+UPDATE `phabricator_differential`.`differential_revision`
+SET `lastReviewerPHID` = (
+  SELECT `authorPHID`
+  FROM `differential_comment`
+  WHERE `revisionID` = `differential_revision`.`id`
+  AND `action` IN ('accept', 'reject')
+  ORDER BY `id` DESC
+  LIMIT 1
+);

src/applications/differential/editor/comment/DifferentialCommentEditor.php

@@ -386,6 +386,12 @@ class DifferentialCommentEditor {
         throw new Exception('Unsupported action.');
     }
 
+    // Update information about reviewer in charge.
+    if ($action == DifferentialAction::ACTION_ACCEPT ||
+        $action == DifferentialAction::ACTION_REJECT) {
+      $revision->setLastReviewerPHID($actor_phid);
+    }
+
     // Always save the revision (even if we didn't actually change any of its
     // properties) so that it jumps to the top of the revision list when sorted
     // by "updated". Notably, this allows "ping" comments to push it to the

src/applications/differential/field/specification/reviewers/DifferentialReviewersFieldSpecification.php

@@ -19,7 +19,6 @@
 final class DifferentialReviewersFieldSpecification
   extends DifferentialFieldSpecification {
 
-  private $primaryReviewers = array();
   private $reviewers;
   private $error;
 
@@ -150,8 +149,8 @@ final class DifferentialReviewersFieldSpecification
   }
 
   public function renderValueForRevisionList(DifferentialRevision $revision) {
-    if (isset($this->primaryReviewers[$revision->getID()])) {
+    $primary_reviewer = $this->getPrimaryReviewer($revision);
-      $primary_reviewer = $this->primaryReviewers[$revision->getID()];
+    if ($primary_reviewer) {
       $other_reviewers = array_flip($revision->getReviewers());
       unset($other_reviewers[$primary_reviewer]);
       if ($other_reviewers) {
@@ -167,16 +166,19 @@ final class DifferentialReviewersFieldSpecification
 
   public function getRequiredHandlePHIDsForRevisionList(
     DifferentialRevision $revision) {
-    $primary_reviewer = $revision->loadReviewedBy();
+    $primary_reviewer = $this->getPrimaryReviewer($revision);
-    if (!$primary_reviewer) {
-      $reviewer_phids = $revision->getReviewers();
-      $primary_reviewer = reset($reviewer_phids);
-    }
     if ($primary_reviewer) {
-      $this->primaryReviewers[$revision->getID()] = $primary_reviewer;
       return array($primary_reviewer);
     }
     return array();
   }
 
+  private function getPrimaryReviewer(DifferentialRevision $revision) {
+    $primary_reviewer = $revision->getLastReviewerPHID();
+    if (!$primary_reviewer) {
+      $primary_reviewer = head($revision->getReviewers());
+    }
+    return $primary_reviewer;
+  }
+
 }

src/applications/differential/storage/revision/DifferentialRevision.php

@@ -26,6 +26,7 @@ class DifferentialRevision extends DifferentialDAO {
 
   protected $phid;
   protected $authorPHID;
+  protected $lastReviewerPHID;
 
   protected $dateCommitted;