Limit some workflow elements to moderators

Allows to streamline triaging and keeping track of reports status,
together with removing confusing elements which non-moderators can
not use anyway.

src/applications/favorites/engineextension/PhabricatorFavoritesMainMenuBarExtension.php

@@ -18,6 +18,10 @@ final class PhabricatorFavoritesMainMenuBarExtension
   public function buildMainMenus() {
     $viewer = $this->getViewer();
 
+    if ($viewer->limitNonContributorUI()) {
+      return array();
+    }
+
     $dropdown = $this->newDropdown($viewer);
     if (!$dropdown) {
       return array();

src/applications/maniphest/editor/ManiphestEditEngine.php

@@ -353,6 +353,18 @@ EODOCS
         continue;
       }
 
+      // Blender: limit task reopen to contributors.
+      //
+      // NOTE: Similar to other semantic check here we don't do it in the
+      // Conduit.
+      $viewer = $this->getViewer();
+      if (ManiphestTaskStatus::isClosedStatus($current_status) &&
+          ManiphestTaskStatus::isOpenStatus($status) &&
+          $viewer->limitNonContributorUI()) {
+        unset($status_map[$status]);
+        continue;
+      }
+
       // Don't allow tasks to be changed directly into "Closed, Duplicate"
       // status. Instead, you have to merge them. See T4819.
       if ($status == $dup_status) {
@@ -382,6 +394,18 @@ EODOCS
         continue;
       }
 
+      // Blender: limit triaging to contributors.
+      //
+      // NOTE: Similar to other semantic check here we don't do it in the
+      // Conduit.
+      $viewer = $this->getViewer();
+      if ($priority != $current_priority) {
+        if (array_search('triage', $priority_keywords[$priority]) === false &&
+            $viewer->limitNonContributorUI()) {
+          continue;
+        }
+      }
+
       $keyword = head(idx($priority_keywords, $priority));
       $results[$keyword] = $priority_name;
     }

src/applications/people/storage/PhabricatorUser.php

@@ -1574,5 +1574,19 @@ final class PhabricatorUser
     return $list;
   }
 
+  // Blender: Limit certain workflow steps to regular contributors, making it
+  // easier to follow status of the tracker.
+  public function limitNonContributorUI() {
+    if ($this->getIsAdmin()) {
+      return false;
+    }
 
+    $project = id(new PhabricatorProjectQuery())
+      ->setViewer($this)
+      ->withNames(array('Moderators'))
+      ->withMemberPHIDs(array($this->getPHID()))
+      ->executeOne();
+
+    return is_null($project);
+  }
 }

src/applications/project/controller/PhabricatorProjectBoardViewController.php

@@ -178,8 +178,10 @@ final class PhabricatorProjectBoardViewController
         $panel->addClass('project-panel-hidden');
       }
 
-      $column_menu = $this->buildColumnMenu($project, $column);
-      $panel->addHeaderAction($column_menu);
+      if (!$viewer->limitNonContributorUI()) {
+        $column_menu = $this->buildColumnMenu($project, $column);
+        $panel->addHeaderAction($column_menu);
+      }
 
       if ($column->canHaveTrigger()) {
         $trigger = $column->getTrigger();