/**
* This function calculates all unassigned students for a particular grouping.
* We enforce a rule that students can only be a member of one group in the
* grouping.
*
* @return array {IDs => names) of potential members.
*
*/
public function get_potential_students()
{
$student = get_archetype_roles('student');
$student = reset($student);
$allmembers = groups_get_potential_members($this->courseid, $student->id);
$allocatedmembers = $this->get_all_grouped_students();
$potentialmemberids = array();
foreach ($allmembers as $allmember) {
if (array_search($allmember->id, $allocatedmembers) === false) {
$potentialmemberids[] = $allmember->id;
}
}
sort($potentialmemberids);
$potentialmembernames = block_skills_group_retrieve_names($potentialmemberids);
// Note: array_combine() will not work with empty arrays.
if (count($potentialmemberids) > 0) {
return array_combine($potentialmemberids, $potentialmembernames);
} else {
return array();
}
}
/**
* This function retrieves and returns a list of members in the given group ID.
*
* @return array {IDs => names} of all members in group.
*
*/
public function get_group_members()
{
global $DB, $USER;
$params = array($this->groupid, $USER->id);
$query = "SELECT userid\n FROM {groups_members}\n WHERE groupid = ? AND userid <> ?";
$records = $DB->get_records_sql($query, $params);
$ids = block_skills_group_strip_to_ids($records);
sort($ids);
$names = block_skills_group_retrieve_names($ids);
// Note: array_combine() will not work with empty arrays.
if (count($ids) > 0) {
return array_combine(array_values($ids), $names);
} else {
return array();
}
}
