Make event invitees behave a little better for stub/ghost events

Summary:
Ref T11326. Currently:

  - The month view and day view (ghosts) don't show that you're invited to a child event.
  - The detail view copies the invite list, including attending status, but only //after// it shows the page for the first time.

Instead, for now, just do this:

  - Ghosts/stubs use the parent invite list, but treat everyone as "invited".
  - Materializing a stub just saves the list as-is (i.e., invited, not a copy of attending/declined/etc).

This behavior may need some refining eventually but is at least reasonable (not obviously bad/buggy).

Test Plan:
  - Viewed month/day views, now shown as "invited".
  - Viewed detail view, now invitee list shows up properly.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T11326

Differential Revision: https://secure.phabricator.com/D16758

src/applications/calendar/editor/PhabricatorCalendarEventEditor.php

@@ -34,25 +34,22 @@ final class PhabricatorCalendarEventEditor
     }
 
     $actor = $this->getActor();
+
+    $invitees = $event->getInvitees();
+
     $event->copyFromParent($actor);
     $event->setIsStub(0);
 
-    $invitees = $event->getParentEvent()->getInvitees();
+    $event->openTransaction();
+      $event->save();
+      foreach ($invitees as $invitee) {
+        $invitee
+          ->setEventPHID($event->getPHID())
+          ->save();
+      }
+    $event->saveTransaction();
 
-    $new_invitees = array();
-    foreach ($invitees as $invitee) {
-      $invitee = id(new PhabricatorCalendarEventInvitee())
-        ->setEventPHID($event->getPHID())
-        ->setInviteePHID($invitee->getInviteePHID())
-        ->setInviterPHID($invitee->getInviterPHID())
-        ->setStatus($invitee->getStatus())
-        ->save();
-
-      $new_invitees[] = $invitee;
-    }
-
-    $event->save();
-    $event->attachInvitees($new_invitees);
+    $event->attachInvitees($invitees);
   }
 
   public function getTransactionTypes() {

src/applications/calendar/storage/PhabricatorCalendarEvent.php

@@ -27,7 +27,6 @@ final class PhabricatorCalendarEvent extends PhabricatorCalendarDAO
 
   protected $isRecurring = 0;
 
-  private $isGhostEvent = false;
   protected $instanceOfEventPHID;
   protected $sequenceIndex;
 
@@ -60,6 +59,9 @@ final class PhabricatorCalendarEvent extends PhabricatorCalendarDAO
   protected $recurrenceEndDate;
   protected $recurrenceFrequency = array();
 
+  private $isGhostEvent = false;
+  private $stubInvitees;
+
   public static function initializeNewCalendarEvent(PhabricatorUser $actor) {
     $app = id(new PhabricatorApplicationQuery())
       ->setViewer($actor)
@@ -449,9 +451,34 @@ final class PhabricatorCalendarEvent extends PhabricatorCalendarDAO
   }
 
   public function getInvitees() {
+    if ($this->getIsGhostEvent() || $this->getIsStub()) {
+      if ($this->stubInvitees === null) {
+        $this->stubInvitees = $this->newStubInvitees();
+      }
+      return $this->stubInvitees;
+    }
+
     return $this->assertAttached($this->invitees);
   }
 
+  private function newStubInvitees() {
+    $parent = $this->getParentEvent();
+
+    $parent_invitees = $parent->getInvitees();
+    $stub_invitees = array();
+
+    foreach ($parent_invitees as $invitee) {
+      $stub_invitee = id(new PhabricatorCalendarEventInvitee())
+        ->setInviteePHID($invitee->getInviteePHID())
+        ->setInviterPHID($invitee->getInviterPHID())
+        ->setStatus(PhabricatorCalendarEventInvitee::STATUS_INVITED);
+
+      $stub_invitees[] = $stub_invitee;
+    }
+
+    return $stub_invitees;
+  }
+
   public function attachInvitees(array $invitees) {
     $this->invitees = $invitees;
     return $this;
@@ -478,6 +505,7 @@ final class PhabricatorCalendarEvent extends PhabricatorCalendarDAO
     if (!$invited) {
       return PhabricatorCalendarEventInvitee::STATUS_UNINVITED;
     }
+
     $invited = $invited->getStatus();
     return $invited;
   }