/**
* Internal function used by groups_get_members_by_role to handle the
* results of a database query that includes a list of users and possible
* roles on a course.
*
* @param moodle_recordset $rs The record set (may be false)
* @param int $context ID of course context
* @return array As described in groups_get_members_by_role
*/
function groups_calculate_role_people($rs, $context)
{
global $CFG, $DB;
if (!$rs) {
return array();
}
$allroles = role_fix_names(get_all_roles($context), $context);
// Array of all involved roles
$roles = array();
// Array of all retrieved users
$users = array();
// Fill arrays
foreach ($rs as $rec) {
// Create information about user if this is a new one
if (!array_key_exists($rec->userid, $users)) {
// User data includes all the optional fields, but not any of the
// stuff we added to get the role details
$userdata = clone $rec;
unset($userdata->roleid);
unset($userdata->roleshortname);
unset($userdata->rolename);
unset($userdata->userid);
$userdata->id = $rec->userid;
// Make an array to hold the list of roles for this user
$userdata->roles = array();
$users[$rec->userid] = $userdata;
}
// If user has a role...
if (!is_null($rec->roleid)) {
// Create information about role if this is a new one
if (!array_key_exists($rec->roleid, $roles)) {
$role = $allroles[$rec->roleid];
$roledata = new stdClass();
$roledata->id = $role->id;
$roledata->shortname = $role->shortname;
$roledata->name = $role->localname;
$roledata->users = array();
$roles[$roledata->id] = $roledata;
}
// Record that user has role
$users[$rec->userid]->roles[$rec->roleid] = $roles[$rec->roleid];
}
}
$rs->close();
// Return false if there weren't any users
if (count($users) == 0) {
return false;
}
// Add pseudo-role for multiple roles
$roledata = new stdClass();
$roledata->name = get_string('multipleroles', 'role');
$roledata->users = array();
$roles['*'] = $roledata;
$roledata = new stdClass();
$roledata->name = get_string('noroles', 'role');
$roledata->users = array();
$roles[0] = $roledata;
// Now we rearrange the data to store users by role
foreach ($users as $userid => $userdata) {
$rolecount = count($userdata->roles);
if ($rolecount == 0) {
// does not have any roles
$roleid = 0;
} else {
if ($rolecount > 1) {
$roleid = '*';
} else {
$userrole = reset($userdata->roles);
$roleid = $userrole->id;
}
}
$roles[$roleid]->users[$userid] = $userdata;
}
// Delete roles not used
foreach ($roles as $key => $roledata) {
if (count($roledata->users) === 0) {
unset($roles[$key]);
}
}
// Return list of roles containing their users
return $roles;
}
public function get_question_states($attempt, $question, moodle_recordset $questionsstatesrs)
{
$qstates = array();
while ($questionsstatesrs->valid()) {
$state = $questionsstatesrs->current();
if ($state->attempt != $attempt->uniqueid || $state->question != $question->id) {
// We have found all the states for this attempt. Stop.
break;
}
// Add the new state to the array, and advance.
$qstates[] = $state;
$questionsstatesrs->next();
}
return $qstates;
}
public function close()
{
$this->rs->close();
}
