// }
switch ($do) {
case 'login':
Login::process();
$content .= Login::renderContent();
$styles[] = Login::getStyles();
$scripts[] = Login::getScripts();
break;
case 'logout':
session_destroy();
break;
case 'design':
WorkoutDesign::process();
$content .= WorkoutDesign::renderContent();
$styles[] = WorkoutDesign::getStyles();
$scripts[] = WorkoutDesign::getScripts();
break;
case 'register':
Register::process();
$styles[] = WorkoutDesign::getStyles();
$content .= Register::renderContent();
break;
case 'assign':
WorkoutAssign::process();
$content .= WorkoutAssign::renderContent();
break;
case 'list':
WorkoutListing::process();
$content .= WorkoutListing::renderContent();
break;
case 'workout':
