function validation($data)
{
global $CFG, $COURSE;
$errors = array();
if (!($users = groups_get_potental_members($data['courseid'], $data['roleid']))) {
$errors['roleid'] = get_string('nousersinrole', 'group');
}
$usercnt = count($users);
/// Check the number entered is sane
if ($data['groupby'] == 'groups') {
if ($data['number'] > $usercnt || $data['number'] < 1) {
$errors['number'] = get_string('toomanygroups', 'group', $usercnt);
}
}
/// Check the naming scheme
$matchcnt = preg_match_all('/[#@]{1,1}/', $data['namingschemegrp']['namingscheme'], $matches);
if ($matchcnt != 1) {
$errors['namingschemegrp'] = get_string('badnamingscheme', 'group');
}
if (count($errors) > 0) {
return $errors;
} else {
return true;
}
}
}
}
/// Create the form
$editform = new autogroup_form('autogroup.php', array('roles' => $rolenames));
$editform->set_data(array('courseid' => $courseid, 'seed' => time()));
/// Handle form submission
if ($editform->is_cancelled()) {
redirect($returnurl);
} elseif ($data = $editform->get_data()) {
/// Allocate members from the selected role to groups
if ($data->allocateby == 'random') {
$orderby = 'firstname';
} else {
$orderby = $data->allocateby;
}
$users = groups_get_potental_members($data->courseid, $data->roleid, $orderby);
$usercnt = count($users);
if ($data->allocateby == 'random') {
srand($data->seed);
shuffle($users);
}
$groups = array();
$i = 0;
$cnt = 0;
if ($data->groupby == 'groups') {
$numgrps = $data->number;
$userpergrp = ceil($usercnt / $numgrps);
} else {
$numgrps = ceil($data->number / $usercnt);
$userpergrp = $data->number;
}