コード例 #1
0
 public static function deletePresentationsByUserBySession($usr_id, $ses_id)
 {
     // Load the existing presentation for the user for this session.
     $existingPresentation = Presentation::getPresentationByUserBySession($usr_id, $ses_id);
     // If the user has any existing presentations during the same session time, delete them.
     if ($existingPresentation != null) {
         $existingPresentation->delete_presentation_for_user($usr_id);
         if ($existingPresentation->pres_paired_pres_id != null) {
             $pairedExistingPresentation = Presentation::getPresentation($existingPresentation->pres_paired_pres_id);
             // iterate through a change of presentation ids until we get back to where we started.
             // for each one, delete the associated presentations
             while ($pairedExistingPresentation->pres_id != $existingPresentation->pres_id) {
                 $pairedExistingPresentation->delete_presentation_for_user($usr_id);
                 $pairedExistingPresentation = Presentation::getPresentation($pairedExistingPresentation->pres_paired_pres_id);
             }
         }
     }
 }