Don't show personalized menu items until users establish a full session

Summary:
Depends on D18792. Fixes T13024. Fixes T89198. Currently, when users are logging in initially (for example, need to enter MFA) we show more menu items than we should.

Notably, we may show some personalized/private account details, like the number of unread notifications (probably not relevant) or a user's saved queries (possibly sensitive). At best these are misleading (they won't work yet) and there's an outside possibility they leak a little bit of private data.

Instead, nuke everything except "Log Out" when users have partial sessions.

Test Plan:
Hit a partial session (MFA required, email verification required) and looked at the menu. Only saw "Log Out".

{F5297713}

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13024

Differential Revision: https://secure.phabricator.com/D18793

src/applications/files/controller/PhabricatorFileDataController.php

@@ -10,6 +10,10 @@ final class PhabricatorFileDataController extends PhabricatorFileController {
     return false;
   }
 
+  public function shouldAllowPartialSessions() {
+    return true;
+  }
+
   public function handleRequest(AphrontRequest $request) {
     $viewer = $request->getViewer();
     $this->phid = $request->getURIData('phid');

src/applications/people/engineextension/PeopleMainMenuBarExtension.php

@@ -9,6 +9,10 @@ final class PeopleMainMenuBarExtension
     return $viewer->isLoggedIn();
   }
 
+  public function shouldAllowPartialSessions() {
+    return true;
+  }
+
   public function getExtensionOrder() {
     return 1200;
   }
@@ -65,6 +69,7 @@ final class PeopleMainMenuBarExtension
     $view = id(new PhabricatorActionListView())
       ->setViewer($viewer);
 
+    if ($this->getIsFullSession()) {
       $view->addAction(
         id(new PhabricatorActionView())
           ->appendChild($user_view));
@@ -101,6 +106,7 @@ final class PeopleMainMenuBarExtension
         id(new PhabricatorActionView())
           ->addSigil('logout-item')
           ->setType(PhabricatorActionView::TYPE_DIVIDER));
+    }
 
     $view->addAction(
       id(new PhabricatorActionView())

src/view/page/menu/PhabricatorMainMenuBarExtension.php

@@ -5,6 +5,7 @@ abstract class PhabricatorMainMenuBarExtension extends Phobject {
   private $viewer;
   private $application;
   private $controller;
+  private $isFullSession;
 
   public function setViewer(PhabricatorUser $viewer) {
     $this->viewer = $viewer;
@@ -33,6 +34,15 @@ abstract class PhabricatorMainMenuBarExtension extends Phobject {
     return $this->controller;
   }
 
+  public function setIsFullSession($is_full_session) {
+    $this->isFullSession = $is_full_session;
+    return $this;
+  }
+
+  public function getIsFullSession() {
+    return $this->isFullSession;
+  }
+
   final public function getExtensionKey() {
     return $this->getPhobjectClassConstant('MAINMENUBARKEY');
   }
@@ -41,6 +51,10 @@ abstract class PhabricatorMainMenuBarExtension extends Phobject {
     return true;
   }
 
+  public function shouldAllowPartialSessions() {
+    return false;
+  }
+
   public function isExtensionEnabledForViewer(PhabricatorUser $viewer) {
     if (!$viewer->isLoggedIn()) {
       return false;

src/view/page/menu/PhabricatorMainMenuView.php

@@ -46,7 +46,9 @@ final class PhabricatorMainMenuView extends AphrontView {
     $app_button = '';
     $aural = null;
 
-    if ($viewer->isLoggedIn() && $viewer->isUserActivated()) {
+    $is_full = $this->isFullSession($viewer);
+
+    if ($is_full) {
       list($menu, $dropdowns, $aural) = $this->renderNotificationMenu();
       if (array_filter($menu)) {
         $alerts[] = $menu;
@@ -54,14 +56,18 @@ final class PhabricatorMainMenuView extends AphrontView {
       $menu_bar = array_merge($menu_bar, $dropdowns);
       $app_button = $this->renderApplicationMenuButton();
       $search_button = $this->renderSearchMenuButton($header_id);
-    } else {
+    } else if (!$viewer->isLoggedIn()) {
       $app_button = $this->renderApplicationMenuButton();
       if (PhabricatorEnv::getEnvConfig('policy.allow-public')) {
         $search_button = $this->renderSearchMenuButton($header_id);
       }
     }
 
+    if ($search_button) {
       $search_menu = $this->renderPhabricatorSearchMenu();
+    } else {
+      $search_menu = null;
+    }
 
     if ($alerts) {
       $alerts = javelin_tag(
@@ -84,7 +90,9 @@ final class PhabricatorMainMenuView extends AphrontView {
 
     $extensions = PhabricatorMainMenuBarExtension::getAllEnabledExtensions();
     foreach ($extensions as $extension) {
-      $extension->setViewer($viewer);
+      $extension
+        ->setViewer($viewer)
+        ->setIsFullSession($is_full);
 
       $controller = $this->getController();
       if ($controller) {
@@ -96,6 +104,14 @@ final class PhabricatorMainMenuView extends AphrontView {
       }
     }
 
+    if (!$is_full) {
+      foreach ($extensions as $key => $extension) {
+        if (!$extension->shouldAllowPartialSessions()) {
+          unset($extensions[$key]);
+        }
+      }
+    }
+
     foreach ($extensions as $key => $extension) {
       if (!$extension->isExtensionEnabledForViewer($extension->getViewer())) {
         unset($extensions[$key]);
@@ -677,4 +693,38 @@ final class PhabricatorMainMenuView extends AphrontView {
     );
   }
 
+  private function isFullSession(PhabricatorUser $viewer) {
+    if (!$viewer->isLoggedIn()) {
+      return false;
+    }
+
+    if (!$viewer->isUserActivated()) {
+      return false;
+    }
+
+    if (!$viewer->hasSession()) {
+      return false;
+    }
+
+    $session = $viewer->getSession();
+    if ($session->getIsPartial()) {
+      return false;
+    }
+
+    if (!$session->getSignedLegalpadDocuments()) {
+      return false;
+    }
+
+    $mfa_key = 'security.require-multi-factor-auth';
+    $need_mfa = PhabricatorEnv::getEnvConfig($mfa_key);
+    if ($need_mfa) {
+      $have_mfa = $viewer->getIsEnrolledInMultiFactor();
+      if (!$have_mfa) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
 }