Give AphrontTagView a getViewer(), deprecate getUser()

Summary:
Two minor changes here:

  - Replace `get/setUser()` with `get/setViewer()` for consistency with everything else.
  - `getViewer()` now throws if no viewer is set. We had a lot of code that either "should" check this but didn't, or did check it in an identical way, duplicating work. In contrast, very little code checks for a viewer but works if one is not present.

Test Plan:
  - Grepped for `->user`.
  - Attempted to fix all callsites inside `*View` classes.
  - Browsed around a bunch of applications, particularly Calendar, Differential and Diffusion, which seemed most heavily affected.

Reviewers: chad

Reviewed By: chad

Differential Revision: https://secure.phabricator.com/D15412

src/applications/badges/view/PhabricatorBadgesRecipientsListView.php

@@ -16,8 +16,7 @@ final class PhabricatorBadgesRecipientsListView extends AphrontView {
   }
 
   public function render() {
-
-    $viewer = $this->user;
+    $viewer = $this->getViewer();
 
     $badge = $this->badge;
     $handles = $this->handles;

src/applications/daemon/view/PhabricatorDaemonLogEventsView.php

@@ -24,12 +24,9 @@ final class PhabricatorDaemonLogEventsView extends AphrontView {
   }
 
   public function render() {
+    $viewer = $this->getViewer();
     $rows = array();
 
-    if (!$this->user) {
-      throw new PhutilInvalidStateException('setUser');
-    }
-
     foreach ($this->events as $event) {
 
       // Limit display log size. If a daemon gets stuck in an output loop this
@@ -83,8 +80,8 @@ final class PhabricatorDaemonLogEventsView extends AphrontView {
 
       $row = array(
         $event->getLogType(),
-        phabricator_date($event->getEpoch(), $this->user),
-        phabricator_time($event->getEpoch(), $this->user),
+        phabricator_date($event->getEpoch(), $viewer),
+        phabricator_time($event->getEpoch(), $viewer),
         array(
           $message,
           $more,

src/applications/daemon/view/PhabricatorDaemonLogListView.php

@@ -11,11 +11,9 @@ final class PhabricatorDaemonLogListView extends AphrontView {
   }
 
   public function render() {
-    $rows = array();
+    $viewer = $this->getViewer();
 
-    if (!$this->user) {
-      throw new PhutilInvalidStateException('setUser');
-    }
+    $rows = array();
 
     $list = new PHUIObjectItemListView();
     $list->setFlush(true);
@@ -27,7 +25,7 @@ final class PhabricatorDaemonLogListView extends AphrontView {
         ->setObjectName(pht('Daemon %s', $id))
         ->setHeader($log->getDaemon())
         ->setHref("/daemon/log/{$id}/")
-        ->addIcon('none', phabricator_datetime($epoch, $this->user));
+        ->addIcon('none', phabricator_datetime($epoch, $viewer));
 
       $status = $log->getStatus();
       switch ($status) {

src/applications/differential/view/DifferentialAddCommentView.php

@@ -50,6 +50,7 @@ final class DifferentialAddCommentView extends AphrontView {
   }
 
   public function render() {
+    $viewer = $this->getViewer();
 
     $this->requireResource('differential-revision-add-comment-css');
     $revision = $this->revision;
@@ -73,7 +74,7 @@ final class DifferentialAddCommentView extends AphrontView {
     $form = new AphrontFormView();
     $form
       ->setWorkflow(true)
-      ->setUser($this->user)
+      ->setViewer($viewer)
       ->setAction($this->actionURI)
       ->addHiddenInput('revision_id', $revision->getID())
       ->appendChild(
@@ -108,7 +109,7 @@ final class DifferentialAddCommentView extends AphrontView {
           ->setID('comment-content')
           ->setLabel(pht('Comment'))
           ->setValue($this->draft ? $this->draft->getDraft() : null)
-          ->setUser($this->user))
+          ->setViewer($viewer))
       ->appendChild(
         id(new AphrontFormSubmitControl())
           ->setValue(pht('Submit')));

src/applications/differential/view/DifferentialChangesetListView.php

@@ -113,6 +113,8 @@ final class DifferentialChangesetListView extends AphrontView {
   }
 
   public function render() {
+    $viewer = $this->getViewer();
+
     $this->requireResource('differential-changeset-view-css');
 
     $changesets = $this->changesets;
@@ -148,7 +150,7 @@ final class DifferentialChangesetListView extends AphrontView {
       ));
 
     $renderer = DifferentialChangesetParser::getDefaultRendererForViewer(
-      $this->getUser());
+      $viewer);
 
     $output = array();
     $ids = array();
@@ -163,7 +165,7 @@ final class DifferentialChangesetListView extends AphrontView {
       $ref = $this->references[$key];
 
       $detail = id(new DifferentialChangesetDetailView())
-        ->setUser($this->getUser());
+        ->setUser($viewer);
 
       $uniq_id = 'diff-'.$changeset->getAnchorName();
       $detail->setID($uniq_id);
@@ -261,6 +263,7 @@ final class DifferentialChangesetListView extends AphrontView {
     DifferentialChangesetDetailView $detail,
     $ref,
     DifferentialChangeset $changeset) {
+    $viewer = $this->getViewer();
 
     $meta = array();
 
@@ -280,7 +283,7 @@ final class DifferentialChangesetListView extends AphrontView {
       try {
         $meta['diffusionURI'] =
           (string)$repository->getDiffusionBrowseURIForPath(
-            $this->user,
+            $viewer,
             $changeset->getAbsoluteRepositoryPath($repository, $this->diff),
             idx($changeset->getMetadata(), 'line:first'),
             $this->getBranch());
@@ -308,13 +311,12 @@ final class DifferentialChangesetListView extends AphrontView {
       }
     }
 
-    $user = $this->user;
-    if ($user && $repository) {
+    if ($viewer && $repository) {
       $path = ltrim(
         $changeset->getAbsoluteRepositoryPath($repository, $this->diff),
         '/');
       $line = idx($changeset->getMetadata(), 'line:first', 1);
-      $editor_link = $user->loadEditorLink($path, $line, $repository);
+      $editor_link = $viewer->loadEditorLink($path, $line, $repository);
       if ($editor_link) {
         $meta['editor'] = $editor_link;
       } else {

src/applications/differential/view/DifferentialLocalCommitsView.php

@@ -17,10 +17,7 @@ final class DifferentialLocalCommitsView extends AphrontView {
   }
 
   public function render() {
-    $user = $this->user;
-    if (!$user) {
-      throw new PhutilInvalidStateException('setUser');
-    }
+    $viewer = $this->getViewer();
 
     $local = $this->localCommits;
     if (!$local) {
@@ -94,7 +91,7 @@ final class DifferentialLocalCommitsView extends AphrontView {
         idx($commit, 'date'),
         idx($commit, 'time'));
       if ($date) {
-        $date = phabricator_datetime($date, $user);
+        $date = phabricator_datetime($date, $viewer);
       }
       $row[] = $date;
 

src/applications/differential/view/DifferentialRevisionListView.php

@@ -57,10 +57,7 @@ final class DifferentialRevisionListView extends AphrontView {
   }
 
   public function render() {
-    $user = $this->user;
-    if (!$user) {
-      throw new PhutilInvalidStateException('setUser');
-    }
+    $viewer = $this->getViewer();
 
     $fresh = PhabricatorEnv::getEnvConfig('differential.days-fresh');
     if ($fresh) {
@@ -83,12 +80,12 @@ final class DifferentialRevisionListView extends AphrontView {
 
     foreach ($this->revisions as $revision) {
       $item = id(new PHUIObjectItemView())
-        ->setUser($user);
+        ->setUser($viewer);
 
       $icons = array();
 
       $phid = $revision->getPHID();
-      $flag = $revision->getFlag($user);
+      $flag = $revision->getFlag($viewer);
       if ($flag) {
         $flag_class = PhabricatorFlagColor::getCSSClass($flag->getColor());
         $icons['flag'] = phutil_tag(
@@ -99,7 +96,7 @@ final class DifferentialRevisionListView extends AphrontView {
           '');
       }
 
-      if ($revision->getDrafts($user)) {
+      if ($revision->getDrafts($viewer)) {
         $icons['draft'] = true;
       }
 

src/applications/diffusion/view/DiffusionTagListView.php

@@ -100,7 +100,7 @@ final class DiffusionTagListView extends DiffusionView {
         $build,
         $author,
         $description,
-        phabricator_datetime($tag->getEpoch(), $this->user),
+        phabricator_datetime($tag->getEpoch(), $this->getViewer()),
       );
     }
 

src/applications/phame/view/PhameBlogListView.php

@@ -3,7 +3,6 @@
 final class PhameBlogListView extends AphrontTagView {
 
   private $blogs;
-  private $viewer;
 
   public function setBlogs($blogs) {
     assert_instances_of($blogs, 'PhameBlog');
@@ -11,11 +10,6 @@ final class PhameBlogListView extends AphrontTagView {
     return $this;
   }
 
-  public function setViewer($viewer) {
-    $this->viewer = $viewer;
-    return $this;
-  }
-
   protected function getTagAttributes() {
     $classes = array();
     $classes[] = 'phame-blog-list';

src/applications/phame/view/PhameDraftListView.php

@@ -4,7 +4,6 @@ final class PhameDraftListView extends AphrontTagView {
 
   private $posts;
   private $blogs;
-  private $viewer;
 
   public function setPosts($posts) {
     assert_instances_of($posts, 'PhamePost');
@@ -18,11 +17,6 @@ final class PhameDraftListView extends AphrontTagView {
     return $this;
   }
 
-  public function setViewer($viewer) {
-    $this->viewer = $viewer;
-    return $this;
-  }
-
   protected function getTagAttributes() {
     $classes = array();
     $classes[] = 'phame-blog-list';

src/applications/phame/view/PhamePostListView.php

@@ -4,7 +4,6 @@ final class PhamePostListView extends AphrontTagView {
 
   private $posts;
   private $nodata;
-  private $viewer;
   private $showBlog = false;
   private $isExternal;
   private $isLive;
@@ -25,11 +24,6 @@ final class PhamePostListView extends AphrontTagView {
     return $this;
   }
 
-  public function setViewer($viewer) {
-    $this->viewer = $viewer;
-    return $this;
-  }
-
   public function setIsExternal($is_external) {
     $this->isExternal = $is_external;
     return $this;
@@ -53,7 +47,7 @@ final class PhamePostListView extends AphrontTagView {
   }
 
   protected function getTagContent() {
-    $viewer = $this->viewer;
+    $viewer = $this->getViewer();
     $posts = $this->posts;
     $nodata = $this->nodata;
 

src/applications/ponder/view/PonderAddAnswerView.php

@@ -18,7 +18,7 @@ final class PonderAddAnswerView extends AphrontView {
 
   public function render() {
     $question = $this->question;
-    $viewer = $this->user;
+    $viewer = $this->getViewer();
 
     $authors = mpull($question->getAnswers(), null, 'getAuthorPHID');
     if (isset($authors[$viewer->getPHID()])) {
@@ -49,7 +49,7 @@ final class PonderAddAnswerView extends AphrontView {
 
     $form = new AphrontFormView();
     $form
-      ->setUser($this->user)
+      ->setViewer($viewer)
       ->setAction($this->actionURI)
       ->setWorkflow(true)
       ->addHiddenInput('question_id', $question->getID())
@@ -59,7 +59,7 @@ final class PonderAddAnswerView extends AphrontView {
           ->setLabel(pht('Answer'))
           ->setError(true)
           ->setID('answer-content')
-          ->setUser($this->user))
+          ->setViewer($viewer))
       ->appendChild(
         id(new AphrontFormSubmitControl())
           ->setValue(pht('Add Answer')));

src/applications/project/view/PhabricatorProjectUserListView.php

@@ -45,7 +45,7 @@ abstract class PhabricatorProjectUserListView extends AphrontView {
   abstract protected function getHeaderText();
 
   public function render() {
-    $viewer = $this->getUser();
+    $viewer = $this->getViewer();
     $project = $this->getProject();
     $user_phids = $this->getUserPHIDs();
 

src/infrastructure/diff/view/PHUIDiffInlineCommentEditView.php

@@ -78,12 +78,11 @@ final class PHUIDiffInlineCommentEditView
     if (!$this->uri) {
       throw new PhutilInvalidStateException('setSubmitURI');
     }
-    if (!$this->user) {
-      throw new PhutilInvalidStateException('setUser');
-    }
+
+    $viewer = $this->getViewer();
 
     $content = phabricator_form(
-      $this->user,
+      $viewer,
       array(
         'action'    => $this->uri,
         'method'    => 'POST',

src/view/AphrontDialogView.php

@@ -236,11 +236,11 @@ final class AphrontDialogView
         $this->cancelText);
     }
 
-    if (!$this->user) {
+    if (!$this->hasViewer()) {
       throw new Exception(
         pht(
           'You must call %s when rendering an %s.',
-          'setUser()',
+          'setViewer()',
           __CLASS__));
     }
 
@@ -308,7 +308,7 @@ final class AphrontDialogView
     if (!$this->renderAsForm) {
       $buttons = array(
         phabricator_form(
-          $this->user,
+          $this->getViewer(),
           $form_attributes,
           array_merge($hidden_inputs, $buttons)),
       );
@@ -376,7 +376,7 @@ final class AphrontDialogView
 
     if ($this->renderAsForm) {
       return phabricator_form(
-        $this->user,
+        $this->getViewer(),
         $form_attributes + $attributes,
         array($hidden_inputs, $content));
     } else {

src/view/AphrontView.php

@@ -6,7 +6,7 @@
 abstract class AphrontView extends Phobject
   implements PhutilSafeHTMLProducerInterface {
 
-  protected $user;
+  private $viewer;
   protected $children = array();
 
 
@@ -14,19 +14,65 @@ abstract class AphrontView extends Phobject
 
 
   /**
-   * @task config
+   * Set the user viewing this element.
+   *
+   * @param PhabricatorUser Viewing user.
+   * @return this
    */
-  public function setUser(PhabricatorUser $user) {
-    $this->user = $user;
+  public function setViewer(PhabricatorUser $viewer) {
+    $this->viewer = $viewer;
     return $this;
   }
 
 
   /**
+   * Get the user viewing this element.
+   *
+   * Throws an exception if no viewer has been set.
+   *
+   * @return PhabricatorUser Viewing user.
+   */
+  public function getViewer() {
+    if (!$this->viewer) {
+      throw new PhutilInvalidStateException('setViewer');
+    }
+
+    return $this->viewer;
+  }
+
+
+  /**
+   * Test if a viewer has been set on this elmeent.
+   *
+   * @return bool True if a viewer is available.
+   */
+  public function hasViewer() {
+    return (bool)$this->viewer;
+  }
+
+
+  /**
+   * Deprecated, use @{method:setViewer}.
+   *
    * @task config
+   * @deprecated
+   */
+  public function setUser(PhabricatorUser $user) {
+    return $this->setViewer($user);
+  }
+
+
+  /**
+   * Deprecated, use @{method:getViewer}.
+   *
+   * @task config
+   * @deprecated
    */
   protected function getUser() {
-    return $this->user;
+    if (!$this->hasViewer()) {
+      return null;
+    }
+    return $this->getViewer();
   }
 
 

src/view/form/AphrontFormView.php

@@ -85,13 +85,13 @@ final class AphrontFormView extends AphrontView {
 
   public function appendRemarkupInstructions($remarkup) {
     return $this->appendInstructions(
-      new PHUIRemarkupView($this->getUser(), $remarkup));
+      new PHUIRemarkupView($this->getViewer(), $remarkup));
 
   }
 
   public function buildLayoutView() {
     foreach ($this->controls as $control) {
-      $control->setUser($this->getUser());
+      $control->setViewer($this->getViewer());
       $control->willRender();
     }
 
@@ -123,7 +123,7 @@ final class AphrontFormView extends AphrontView {
 
     $layout = $this->buildLayoutView();
 
-    if (!$this->user) {
+    if (!$this->hasViewer()) {
       throw new Exception(
         pht(
           'You must pass the user to %s.',
@@ -136,7 +136,7 @@ final class AphrontFormView extends AphrontView {
     }
 
     return phabricator_form(
-      $this->user,
+      $this->getViewer(),
       array(
         'class'   => $this->shaded ? 'phui-form-shaded' : null,
         'action'  => $this->action,

src/view/form/control/AphrontFormDateControl.php

@@ -137,12 +137,12 @@ final class AphrontFormDateControl extends AphrontFormControl {
   }
 
   private function getTimeFormat() {
-    return $this->getUser()
+    return $this->getViewer()
       ->getPreference(PhabricatorUserPreferences::PREFERENCE_TIME_FORMAT);
   }
 
   private function getDateFormat() {
-    return $this->getUser()
+    return $this->getViewer()
       ->getPreference(PhabricatorUserPreferences::PREFERENCE_DATE_FORMAT);
   }
 
@@ -153,7 +153,7 @@ final class AphrontFormDateControl extends AphrontFormControl {
   private function formatTime($epoch, $fmt) {
     return phabricator_format_local_time(
       $epoch,
-      $this->user,
+      $this->getViewer(),
       $fmt);
   }
 
@@ -259,7 +259,7 @@ final class AphrontFormDateControl extends AphrontFormControl {
       ),
       $time_sel);
 
-    $preferences = $this->user->loadPreferences();
+    $preferences = $this->getViewer()->loadPreferences();
     $pref_week_start = PhabricatorUserPreferences::PREFERENCE_WEEK_START_DAY;
     $week_start = $preferences->getPreference($pref_week_start, 0);
 
@@ -300,12 +300,9 @@ final class AphrontFormDateControl extends AphrontFormControl {
       return $this->zone;
     }
 
-    $user = $this->getUser();
-    if (!$this->getUser()) {
-      throw new PhutilInvalidStateException('setUser');
-    }
+    $viewer = $this->getViewer();
 
-    $user_zone = $user->getTimezoneIdentifier();
+    $user_zone = $viewer->getTimezoneIdentifier();
     $this->zone = new DateTimeZone($user_zone);
     return $this->zone;
   }

src/view/form/control/AphrontFormTokenizerControl.php

@@ -90,8 +90,8 @@ final class AphrontFormTokenizerControl extends AphrontFormControl {
     }
 
     $username = null;
-    if ($this->user) {
-      $username = $this->user->getUsername();
+    if ($this->hasViewer()) {
+      $username = $this->getViewer()->getUsername();
     }
 
     $datasource_uri = $datasource->getDatasourceURI();

src/view/layout/AphrontSideNavFilterView.php

@@ -199,9 +199,6 @@ final class AphrontSideNavFilterView extends AphrontView {
   }
 
   private function renderFlexNav() {
-
-    $user = $this->user;
-
     require_celerity_resource('phabricator-nav-view-css');
 
     $nav_classes = array();

src/view/layout/PhabricatorActionListView.php

@@ -22,9 +22,7 @@ final class PhabricatorActionListView extends AphrontView {
   }
 
   public function render() {
-    if (!$this->user) {
-      throw new PhutilInvalidStateException('setUser');
-    }
+    $viewer = $this->getViewer();
 
     $event = new PhabricatorEvent(
       PhabricatorEventType::TYPE_UI_DIDRENDERACTIONS,
@@ -32,7 +30,7 @@ final class PhabricatorActionListView extends AphrontView {
         'object'  => $this->object,
         'actions' => $this->actions,
       ));
-    $event->setUser($this->user);
+    $event->setUser($viewer);
     PhutilEventEngine::dispatchEvent($event);
 
     $actions = $event->getValue('actions');
@@ -41,7 +39,7 @@ final class PhabricatorActionListView extends AphrontView {
     }
 
     foreach ($actions as $action) {
-      $action->setUser($this->user);
+      $action->setViewer($viewer);
     }
 
     require_celerity_resource('phabricator-action-list-view-css');

src/view/layout/PhabricatorActionView.php

@@ -125,11 +125,11 @@ final class PhabricatorActionView extends AphrontView {
       $sigils = $sigils ? implode(' ', $sigils) : null;
 
       if ($this->renderAsForm) {
-        if (!$this->user) {
+        if (!$this->hasViewer()) {
           throw new Exception(
             pht(
               'Call %s when rendering an action as a form.',
-              'setUser()'));
+              'setViewer()'));
         }
 
         $item = javelin_tag(
@@ -140,7 +140,7 @@ final class PhabricatorActionView extends AphrontView {
           array($icon, $this->name));
 
         $item = phabricator_form(
-          $this->user,
+          $this->getViewer(),
           array(
             'action'    => $this->getHref(),
             'method'    => 'POST',

src/view/page/menu/PhabricatorMainMenuSearchView.php

@@ -24,7 +24,7 @@ final class PhabricatorMainMenuSearchView extends AphrontView {
   }
 
   public function render() {
-    $user = $this->user;
+    $viewer = $this->getViewer();
 
     $target_id = celerity_generate_unique_node_id();
     $search_id = $this->getID();
@@ -86,7 +86,7 @@ final class PhabricatorMainMenuSearchView extends AphrontView {
     $selector = $this->buildModeSelector($selector_id, $application_id);
 
     $form = phabricator_form(
-      $user,
+      $viewer,
       array(
         'action' => '/search/',
         'method' => 'POST',
@@ -109,7 +109,7 @@ final class PhabricatorMainMenuSearchView extends AphrontView {
   }
 
   private function buildModeSelector($selector_id, $application_id) {
-    $viewer = $this->getUser();
+    $viewer = $this->getViewer();
 
     $items = array();
     $items[] = array(

src/view/page/menu/PhabricatorMainMenuView.php

@@ -24,7 +24,7 @@ final class PhabricatorMainMenuView extends AphrontView {
   }
 
   public function render() {
-    $user = $this->user;
+    $viewer = $this->getViewer();
 
     require_celerity_resource('phabricator-main-menu-view');
 
@@ -35,7 +35,7 @@ final class PhabricatorMainMenuView extends AphrontView {
     $app_button = '';
     $aural = null;
 
-    if ($user->isLoggedIn() && $user->isUserActivated()) {
+    if ($viewer->isLoggedIn() && $viewer->isUserActivated()) {
       list($menu, $dropdowns, $aural) = $this->renderNotificationMenu();
       if (array_filter($menu)) {
         $alerts[] = $menu;
@@ -77,10 +77,10 @@ final class PhabricatorMainMenuView extends AphrontView {
     $controller = $this->getController();
     foreach ($applications as $application) {
       $app_actions = $application->buildMainMenuItems(
-        $user,
+        $viewer,
         $controller);
       $app_extra = $application->buildMainMenuExtraNodes(
-        $user,
+        $viewer,
         $controller);
 
       foreach ($app_actions as $action) {
@@ -97,7 +97,7 @@ final class PhabricatorMainMenuView extends AphrontView {
 
     $extensions = PhabricatorMainMenuBarExtension::getAllEnabledExtensions();
     foreach ($extensions as $extension) {
-      $extension->setViewer($user);
+      $extension->setViewer($viewer);
 
       $controller = $this->getController();
       if ($controller) {
@@ -158,7 +158,7 @@ final class PhabricatorMainMenuView extends AphrontView {
   }
 
   private function renderSearch() {
-    $user = $this->user;
+    $viewer = $this->getViewer();
 
     $result = null;
 
@@ -166,15 +166,15 @@ final class PhabricatorMainMenuView extends AphrontView {
       'helpURI' => '/help/keyboardshortcut/',
     );
 
-    if ($user->isLoggedIn()) {
-      $show_search = $user->isUserActivated();
+    if ($viewer->isLoggedIn()) {
+      $show_search = $viewer->isUserActivated();
     } else {
       $show_search = PhabricatorEnv::getEnvConfig('policy.allow-public');
     }
 
     if ($show_search) {
       $search = new PhabricatorMainMenuSearchView();
-      $search->setUser($user);
+      $search->setViewer($viewer);
 
       $application = null;
       $controller = $this->getController();
@@ -188,7 +188,7 @@ final class PhabricatorMainMenuView extends AphrontView {
       $result = $search;
 
       $pref_shortcut = PhabricatorUserPreferences::PREFERENCE_SEARCH_SHORTCUT;
-      if ($user->loadPreferences()->getPreference($pref_shortcut, true)) {
+      if ($viewer->loadPreferences()->getPreference($pref_shortcut, true)) {
         $keyboard_config['searchID'] = $search->getID();
       }
     }
@@ -230,7 +230,7 @@ final class PhabricatorMainMenuView extends AphrontView {
   }
 
   private function renderApplicationMenu(array $bar_items) {
-    $user = $this->getUser();
+    $viewer = $this->getViewer();
 
     $view = $this->getApplicationMenu();
 
@@ -302,7 +302,7 @@ final class PhabricatorMainMenuView extends AphrontView {
       $logo_uri = $cache->getKey($cache_key_logo);
       if (!$logo_uri) {
         $file = id(new PhabricatorFileQuery())
-          ->setViewer($this->getUser())
+          ->setViewer($this->getViewer())
           ->withPHIDs(array($custom_header))
           ->executeOne();
         if ($file) {
@@ -355,7 +355,7 @@ final class PhabricatorMainMenuView extends AphrontView {
   }
 
   private function renderNotificationMenu() {
-    $user = $this->user;
+    $viewer = $this->getViewer();
 
     require_celerity_resource('phabricator-notification-css');
     require_celerity_resource('phabricator-notification-menu-css');
@@ -364,7 +364,7 @@ final class PhabricatorMainMenuView extends AphrontView {
     $aural = array();
 
     $dropdown_query = id(new AphlictDropdownDataQuery())
-      ->setViewer($user);
+      ->setViewer($viewer);
     $dropdown_data = $dropdown_query->execute();
 
     $message_tag = '';

src/view/phui/PHUIFeedStoryView.php

@@ -172,8 +172,8 @@ final class PHUIFeedStoryView extends AphrontView {
     if ($this->epoch) {
       // TODO: This is really bad; when rendering through Conduit and via
       // renderText() we don't have a user.
-      if ($this->user) {
-        $foot = phabricator_datetime($this->epoch, $this->user);
+      if ($this->hasViewer()) {
+        $foot = phabricator_datetime($this->epoch, $this->getViewer());
       } else {
         $foot = null;
       }

src/view/phui/calendar/PHUICalendarDayView.php

@@ -278,7 +278,7 @@ final class PHUICalendarDayView extends AphrontView {
       ->addClass('calendar-day-view-sidebar');
 
     $list = id(new PHUICalendarListView())
-      ->setUser($this->user)
+      ->setUser($this->getViewer())
       ->setView('day');
 
     if (count($events) == 0) {
@@ -304,7 +304,7 @@ final class PHUICalendarDayView extends AphrontView {
 
     $box_start_time = clone $display_start_day;
 
-    $today_time = PhabricatorTime::getTodayMidnightDateTime($this->user);
+    $today_time = PhabricatorTime::getTodayMidnightDateTime($this->getViewer());
     $tomorrow_time = clone $today_time;
     $tomorrow_time->modify('+1 day');
 
@@ -437,7 +437,7 @@ final class PHUICalendarDayView extends AphrontView {
   }
 
   private function getDateTime() {
-    $user = $this->user;
+    $user = $this->getViewer();
     $timezone = new DateTimeZone($user->getTimezoneIdentifier());
 
     $day = $this->day;

src/view/phui/calendar/PHUICalendarMonthView.php

@@ -51,9 +51,7 @@ final class PHUICalendarMonthView extends AphrontView {
   }
 
   public function render() {
-    if (empty($this->user)) {
-      throw new PhutilInvalidStateException('setUser');
-    }
+    $viewer = $this->getViewer();
 
     $events = msort($this->events, 'getEpochStart');
     $days = $this->getDatesInMonth();
@@ -93,7 +91,7 @@ final class PHUICalendarMonthView extends AphrontView {
       $counter = 0;
 
       $list = new PHUICalendarListView();
-      $list->setUser($this->user);
+      $list->setViewer($viewer);
       foreach ($all_day_events as $item) {
         if ($counter <= $max_daily) {
           $list->addEvent($item);
@@ -495,9 +493,9 @@ final class PHUICalendarMonthView extends AphrontView {
    * @return list List of DateTimes, one for each day.
    */
   private function getDatesInMonth() {
-    $user = $this->user;
+    $viewer = $this->getViewer();
 
-    $timezone = new DateTimeZone($user->getTimezoneIdentifier());
+    $timezone = new DateTimeZone($viewer->getTimezoneIdentifier());
 
     $month = $this->month;
     $year = $this->year;
@@ -575,7 +573,7 @@ final class PHUICalendarMonthView extends AphrontView {
   }
 
   private function getWeekStartAndEnd() {
-    $preferences = $this->user->loadPreferences();
+    $preferences = $this->getViewer()->loadPreferences();
     $pref_week_start = PhabricatorUserPreferences::PREFERENCE_WEEK_START_DAY;
 
     $week_start = $preferences->getPreference($pref_week_start, 0);
@@ -585,7 +583,7 @@ final class PHUICalendarMonthView extends AphrontView {
   }
 
   private function getDateTime() {
-    $user = $this->user;
+    $user = $this->getViewer();
     $timezone = new DateTimeZone($user->getTimezoneIdentifier());
 
     $month = $this->month;