$flag = false;
$result = mysqli_query($conn, $sql_get_assignment);
if ($result == true && mysqli_num_rows($result) != 0) {
$assignment = new Assignment($conn, $_GET["id"]);
if (!isUserTypeLogged("Administrator") && $_SESSION["loggedUser"]->getId() != $assignment->getAuthor()->getId()) {
dieWithError("err-edit-assignment-rights");
}
} else {
$assignment = new Assignment($conn, 0);
$flag = true;
}
if (isset($_POST['checkbox'])) {
$assignment->deleteAttachments($conn, $_POST['checkbox']);
}
if (isset($_POST['skName']) && $_POST['skName'] != $assignment->getSkName()) {
$assignment->setSkName($conn, $_POST['skName']);
}
if (isset($_POST['engName']) && $_POST['engName'] != $assignment->getEngName()) {
$assignment->setEngName($conn, $_POST['engName']);
}
if (isset($_POST['skTextPopis']) && $_POST['skTextPopis'] != $assignment->getSkTxt()) {
$assignment->setSkTxt($conn, $_POST['skTextPopis']);
}
if (isset($_POST['engTextPopis']) && $_POST['engTextPopis'] != $assignment->getEngTxt()) {
$assignment->setEngTxt($conn, $_POST['engTextPopis']);
}
if (isset($_POST['textVideo']) && $_POST['textVideo'] != "") {
$assignment->uploadVideo($conn, $_POST['textVideo']);
}
if (isset($_FILES['uploadedFiles'])) {
$fileCount = count($_FILES['uploadedFiles']["name"]);
