$function = $_GET['function']; /* Mediator functions: */ if ($function == 'displayAllSessions') { $med->displayAllSessions(); } elseif ($function == 'logout') { $med->getUser()->logout(); } elseif ($function == 'getJsonMessages') { $med->getJsonMessages(); } elseif ($function == 'sendJsonMessage') { $med->sendJsonMessage($_GET['jsonString']); } elseif ($function == 'sendMessage') { $med->sendMessage($_GET['recipient'], $_GET['subject'], $_GET['content']); } elseif ($function == 'getAllowedRecipients') { $med->getAllowedRecipients(); } elseif ($function == 'deleteMessage') { $med->deleteMessage($_GET['messageID']); } elseif ($function == 'registerJsonUser') { $med->registerJsonUser($_GET['jsonString']); } elseif ($function == 'displayAttendingSessions') { $med->displayAttendingSessions(); } elseif ($function == 'willAttend') { $med->willAttend($_GET['sessionID']); } elseif ($function == 'cancelAttend') { $med->cancelAttend($_GET['sessionID']); } elseif ($function == 'signUpToTutor') { $med->signUpToTutor($_GET['sessionID']); } elseif ($function == 'cancelTutor') { $med->cancelTutor($_GET['sessionID']); } elseif ($function == 'displaySessions') { $med->displaySessions(); } elseif ($function == 'createSession') {