private function buildHeaderView(PhabricatorCalendarEvent $event)
 {
     $viewer = $this->getRequest()->getUser();
     $id = $event->getID();
     $is_cancelled = $event->getIsCancelled();
     $icon = $is_cancelled ? 'fa-times' : 'fa-calendar';
     $color = $is_cancelled ? 'grey' : 'green';
     $status = $is_cancelled ? pht('Cancelled') : pht('Active');
     $invite_status = $event->getUserInviteStatus($viewer->getPHID());
     $status_invited = PhabricatorCalendarEventInvitee::STATUS_INVITED;
     $is_invite_pending = $invite_status == $status_invited;
     $header = id(new PHUIHeaderView())->setUser($viewer)->setHeader($event->getName())->setStatus($icon, $color, $status)->setPolicyObject($event);
     if ($is_invite_pending) {
         $decline_button = id(new PHUIButtonView())->setTag('a')->setIcon('fa-times grey')->setHref($this->getApplicationURI("/event/decline/{$id}/"))->setWorkflow(true)->setText(pht('Decline'));
         $accept_button = id(new PHUIButtonView())->setTag('a')->setIcon('fa-check green')->setHref($this->getApplicationURI("/event/accept/{$id}/"))->setWorkflow(true)->setText(pht('Accept'));
         $header->addActionLink($decline_button)->addActionLink($accept_button);
     }
     return $header;
 }
 private function buildRSVPActions(PhabricatorCalendarEvent $event)
 {
     $viewer = $this->getViewer();
     $id = $event->getID();
     $invite_status = $event->getUserInviteStatus($viewer->getPHID());
     $status_invited = PhabricatorCalendarEventInvitee::STATUS_INVITED;
     $is_invite_pending = $invite_status == $status_invited;
     if (!$is_invite_pending) {
         return array();
     }
     $decline_button = id(new PHUIButtonView())->setTag('a')->setIcon('fa-times grey')->setHref($this->getApplicationURI("/event/decline/{$id}/"))->setWorkflow(true)->setText(pht('Decline'));
     $accept_button = id(new PHUIButtonView())->setTag('a')->setIcon('fa-check green')->setHref($this->getApplicationURI("/event/accept/{$id}/"))->setWorkflow(true)->setText(pht('Accept'));
     return array($decline_button, $accept_button);
 }