function display_default()
{
global $CURMAN, $DB, $OUTPUT;
//the specific role we are asigning users to
$roleid = $this->optional_param('role', '', PARAM_INT);
//the specific context id we are assigning roles on
$context = $this->get_context();
if ($roleid) {
//make sure the current user can assign roles on the current context
$assignableroles = get_assignable_roles($context, ROLENAME_BOTH);
$roleids = array_keys($assignableroles);
if (!in_array($roleid, $roleids)) {
print_error('nopermissions', 'error');
}
return parent::display_default();
} else {
//use the standard link decorator to link role names to their specific sub-pages
$decorators = array(new role_name_decorator($this), 'decorate');
//determine all apprlicable roles we can assign users as the current context
$assignableroles = get_assignable_roles($context, ROLENAME_BOTH);
if (count($assignableroles) > 0) {
$roles = array();
foreach ($assignableroles as $roleid => $rolename) {
$rec = new stdClass();
$rec->id = $roleid;
$rec->name = $rolename;
$rec->description = format_string($DB->get_field('role', 'description', array('id' => $roleid)));
$rec->count = $this->count_role_users($roleid, $context);
$roles[$roleid] = $rec;
}
$columns = array('name' => array('header' => get_string('name'), 'decorator' => $decorators), 'description' => array('header' => get_string('description')), 'count' => array('header' => get_string('users')));
$table = new nosort_table($roles, $columns, $this->url);
echo $table->get_html();
} else {
//determine if there are any roles whose assignments are not permitted for the current user
//by the "Allow role assignments" tab
$admin_assignable_roles = get_assignable_roles($context, ROLENAME_BOTH, false, get_admin());
if (count($admin_assignable_roles) > 0) {
//denied based on configuration
echo $OUTPUT->box(get_string('norolespermitted', 'local_elisprogram'));
} else {
//no roles are assignable at this context
echo $OUTPUT->box(get_string('norolesexist', 'local_elisprogram'));
}
}
}
}
