Hide upload JS stuff if user isn't logged in

Summary: ...cuz it won't work. I think adding a "login to upload" has no real value as this is a pretty unexpected / power user feature anyway. Fixes T4354.

Test Plan: tried to upload as a logged out user to Phabricator home. my browser just loaded the file as expected.

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Maniphest Tasks: T4354

Differential Revision: https://secure.phabricator.com/D8298

src/applications/files/controller/PhabricatorFileListController.php

@@ -78,7 +78,8 @@ final class PhabricatorFileListController extends PhabricatorFileController
       $list_view->addItem($item);
     }
 
-    $list_view->appendChild(new PhabricatorGlobalUploadTargetView());
+    $list_view->appendChild(id(new PhabricatorGlobalUploadTargetView())
+      ->setUser($user));
 
     return $list_view;
   }

src/applications/files/controller/PhabricatorFileUploadController.php

@@ -65,6 +65,7 @@ final class PhabricatorFileUploadController extends PhabricatorFileController {
     $title = pht('Upload File');
 
     $global_upload = id(new PhabricatorGlobalUploadTargetView())
+      ->setUser($user)
       ->setShowIfSupportedID($support_id);
 
     $form_box = id(new PHUIObjectBoxView())

src/applications/files/view/PhabricatorGlobalUploadTargetView.php

@@ -14,6 +14,11 @@ final class PhabricatorGlobalUploadTargetView extends AphrontView {
   }
 
   public function render() {
+    $viewer = $this->getUser();
+    if (!$viewer->isLoggedIn()) {
+      return null;
+    }
+
     $instructions_id = celerity_generate_unique_node_id();
 
     require_celerity_resource('global-drag-and-drop-css');

src/applications/home/controller/PhabricatorHomeMainController.php

@@ -75,8 +75,10 @@ final class PhabricatorHomeMainController
       $this->minipanels,
     );
 
+    $user = $this->getRequest()->getUser();
     $nav->appendChild($content);
-    $nav->appendChild(new PhabricatorGlobalUploadTargetView());
+    $nav->appendChild(id(new PhabricatorGlobalUploadTargetView())
+      ->setUser($user));
 
     return $this->buildApplicationPage(
       $nav,