function perform()
 {
     // don't lose the db!
     $db = $_REQUEST['db'];
     if (isset($_POST['all'])) {
         $location_id = $_POST['all'];
     } else {
         $location_id = $_POST['visible'];
     }
     $short_name = $_POST['library'];
     $lib_f = new LibraryFinder($db);
     $library = $lib_f->getLibraryByName($short_name);
     $library_id = $library['library_id'];
     $lf = new LocationFinder($db);
     $location_name = $lf->getLocation($location_id);
     if (isset($_POST['add'])) {
         $add = $lf->addBridgeItem($location_id, $library_id, $location_name);
     } elseif (isset($_POST['remove'])) {
         $remove = $lf->removeBridgeItem($location_id, $library_id);
     } elseif (isset($_POST['up'])) {
         $location_id = $_POST['visible'];
         $up = $lf->moveBridgeItemUp($location_id, $library_id);
     } elseif (isset($_POST['down'])) {
         $location_id = $_POST['visible'];
         $down = $lf->moveBridgeItemDown($location_id, $library_id);
     }
     $loa = new LibraryAdminFormAction();
     $result = $loa->perform();
     $_REQUEST['library_id'] = $library['library_id'];
     $_REQUEST['library'] = $library['short_name'];
     $_REQUEST['full_name'] = $library['full_name'];
     $_REQUEST['parent_table'] = 'locations';
     $_REQUEST['locationList'] = $lf->findByLibraryID($library['library_id']);
     return $result;
 }
 function perform()
 {
     // set display requirements
     $result = array('renderer' => 'template_renderer.inc', 'pageTitle' => SITE_NAME . ' : Library Admin	', 'content' => 'content/admin/libraryAdmin.php');
     // don't lose the db!
     $db = $_REQUEST['db'];
     // where are we?
     $uf = new UserFinder($db);
     $user = $uf->findById($_SESSION['userId']);
     $result['user'] = $user;
     $lf = new LibraryFinder($db);
     $libraryList = $lf->getAllLibraries();
     $result['libraryList'] = $libraryList;
     if (isset($_POST['library_id'])) {
         $libraryID = $_POST['library_id'];
         $library = $lf->getLibraryName($libraryID);
     } else {
         $library = $user['library_short_name'];
         $libraryID = $user['library_id'];
     }
     $result['library_id'] = $libraryID;
     $result['library'] = $library;
     $locationFinder = new LocationFinder($db);
     $result['locationList'] = $locationFinder->findByLibraryID($libraryID);
     $result['distinctLocationList'] = $locationFinder->getDistinctLocations();
     $af = new AdminFinder($db);
     $adminTableList = $af->getAdminTables();
     $result['adminTables'] = $adminTableList;
     return $result;
 }