protected function mergeEdgeData($type, array $u, array $v) { $result = parent::mergeEdgeData($type, $u, $v); switch ($type) { case DifferentialRevisionHasReviewerEdgeType::EDGECONST: // When the same reviewer has their status updated by multiple // transactions, we want the strongest status to win. An example of // this is when a user adds a comment and also accepts a revision which // they are a reviewer on. The comment creates a "commented" status, // while the accept creates an "accepted" status. Since accept is // stronger, it should win and persist. $u_status = idx($u, 'status'); $v_status = idx($v, 'status'); $u_str = DifferentialReviewerStatus::getStatusStrength($u_status); $v_str = DifferentialReviewerStatus::getStatusStrength($v_status); if ($u_str > $v_str) { $result['status'] = $u_status; } else { $result['status'] = $v_status; } break; } return $result; }