/**
* Delete a message from the NanoGong database.
**/
function nanogong_delete_message($nanogong, $messageid, &$error)
{
global $CFG, $USER;
if (!isstudent($nanogong->course) && !isteacheredit($nanogong->course)) {
$error = get_string("notincourse", "nanogong");
return false;
}
if ($nanogong_message = get_record("nanogong_message", "id", $messageid)) {
if (isstudent($nanogong->course) && $nanogong_message->locked) {
$error = get_string("lockerror", "nanogong");
return false;
}
$soundfile = $CFG->dataroot . $nanogong_message->path;
if (file_exists($soundfile)) {
@unlink($soundfile);
}
if (substr($CFG->release, 0, 3) == "1.9") {
return delete_records("nanogong_message", "id", $nanogong_message->id) && nanogong_update_grades($nanogong, $nanogong_message->userid);
}
return delete_records("nanogong_message", "id", $nanogong_message->id);
}
return false;
}
/**
* Update grades in central gradebook
*
* @param object $nanogong null means all nanogongs
* @param int $userid specific user only, 0 mean all
*/
function nanogong_update_grades($nanogong = null, $userid = 0, $nullifnone = true)
{
global $CFG;
if (!function_exists('grade_update')) {
//workaround for buggy PHP versions
require_once $CFG->libdir . '/gradelib.php';
}
if ($nanogong != null) {
if ($grades = nanogong_get_user_grades($nanogong, $userid)) {
nanogong_grade_item_update($nanogong, $grades);
} else {
if ($userid and $nullifnone) {
$grade = new object();
$grade->userid = $userid;
$grade->rawgrade = NULL;
nanogong_grade_item_update($nanogong, $grade);
} else {
nanogong_grade_item_update($nanogong);
}
}
} else {
$sql = "SELECT a.*, cm.idnumber as cmidnumber, a.course as courseid\n FROM {$CFG->prefix}nanogong a, {$CFG->prefix}course_modules cm, {$CFG->prefix}modules m\n WHERE m.name='nanogong' AND m.id=cm.module AND cm.instance=a.id";
if ($rs = get_recordset_sql($sql)) {
while ($nanogong = rs_fetch_next_record($rs)) {
if ($nanogong->maxscore != 0) {
nanogong_update_grades($nanogong, 0, false);
} else {
nanogong_grade_item_update($nanogong);
}
}
rs_close($rs);
}
}
return true;
}