public function actionGenerateSignatureQR()
{
if (Yii::app()->user->id) {
$QRSignature = new SignatureQRCodeGenerator();
// TODO: need to get a unique code for the user and add a key here!
$user = User::model()->findByPk(Yii::app()->user->id);
$user_code = $this->getUniqueCodeForUser();
if (!$user_code) {
throw new CHttpException('Could not get unique code for user - unique codes might need to be generated');
}
$finalUniqueCode = $user->generateUniqueCodeWithChecksum($user_code);
$QRimage = $QRSignature->createQRCode("@U:1@code:" . $finalUniqueCode . "@key:" . md5(Yii::app()->user->id), 250);
// Output and free from memory
header('Content-Type: image/jpeg');
imagejpeg($QRimage);
imagedestroy($QRimage);
}
}