print_error('nocourseid');
}
require_login($course);
$context = get_context_instance(CONTEXT_COURSE, $course->id);
require_capability('moodle/grade:manage', $context);
// default return url
$gpr = new grade_plugin_return();
$returnurl = $gpr->get_return_url($CFG->wwwroot . '/grade/report.php?id=' . $course->id);
if (!($grade_item = grade_item::fetch(array('id' => $id, 'courseid' => $course->id)))) {
error('Incorect item id');
}
// activity items and items without grade can not have calculation
if ($grade_item->is_external_item() or $grade_item->gradetype != GRADE_TYPE_VALUE and $grade_item->gradetype != GRADE_TYPE_SCALE) {
redirect($returnurl, get_string('errornocalculationallowed', 'grades'));
}
$mform = new edit_calculation_form(null, array('gpr' => $gpr, 'itemid' => $grade_item->id));
if ($mform->is_cancelled()) {
redirect($returnurl);
}
$calculation = calc_formula::localize($grade_item->calculation);
$calculation = grade_item::denormalize_formula($calculation, $grade_item->courseid);
$mform->set_data(array('courseid' => $grade_item->courseid, 'calculation' => $calculation, 'id' => $grade_item->id, 'itemname' => $grade_item->itemname));
$errors = array();
if ($data = $mform->get_data(false)) {
$calculation = calc_formula::unlocalize($data->calculation);
$grade_item->set_calculation($calculation);
redirect($returnurl);
} elseif (!empty($section) and $section = 'idnumbers' and !empty($idnumbers)) {
// Handle idnumbers separately (non-mform)
//first validate and store the new idnumbers
foreach ($idnumbers as $giid => $value) {
