Allow public viewing of profiles and people calendars

Summary: Ref T4830, this allows profile view and calendar profile view to be publicly visible. Also adds a note reminding the user of visibility.

Test Plan: Log out, visit a profile and various links.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T4830

Differential Revision: https://secure.phabricator.com/D13676

src/applications/people/controller/PhabricatorPeopleCalendarController.php

@@ -5,6 +5,10 @@ final class PhabricatorPeopleCalendarController
 
   private $username;
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function shouldRequireAdmin() {
     return false;
   }

src/applications/people/controller/PhabricatorPeopleProfileController.php

@@ -5,6 +5,10 @@ final class PhabricatorPeopleProfileController
 
   private $username;
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function shouldRequireAdmin() {
     return false;
   }

src/applications/people/controller/PhabricatorPeopleProfileEditController.php

@@ -66,15 +66,25 @@ final class PhabricatorPeopleProfileEditController
       ->setUser($viewer);
 
     $field_list->appendFieldsToForm($form);
-
     $form
       ->appendChild(
         id(new AphrontFormSubmitControl())
           ->addCancelButton($profile_uri)
           ->setValue(pht('Save Profile')));
 
+    $allow_public = PhabricatorEnv::getEnvConfig('policy.allow-public');
+    $note = null;
+    if ($allow_public) {
+      $note = id(new PHUIInfoView())
+        ->setSeverity(PHUIInfoView::SEVERITY_WARNING)
+        ->appendChild(pht(
+          'Information on user profiles on this install is publicly '.
+          'visible.'));
+    }
+
     $form_box = id(new PHUIObjectBoxView())
       ->setHeaderText(pht('Edit Profile'))
+      ->setInfoView($note)
       ->setValidationException($validation_exception)
       ->setForm($form);