public static function getInstance()
{
if (isset(self::$_instance)) {
return self::$_instance;
}
$c = __CLASS__;
self::$_instance = new $c();
$res = db_query_params('SELECT r.role_id FROM pfo_role r, pfo_role_class c WHERE r.role_class = c.class_id AND c.class_name = "$1"', array('PFO_RoleLoggedIn'));
if (!$res || !db_numrows($res)) {
throw new Exception("No PFO_RoleLoggedIn role in the database");
}
self::$_instance->_role_id = db_result($res, 0, 'role_id');
$hook_params = array();
$hook_params['role'] =& self::$_instance;
plugin_hook("role_get", $hook_params);
self::$_instance->fetchData(self::$_instance->_role_id);
return self::$_instance;
}
public function getRoleById($role_id)
{
if (array_key_exists($role_id, $this->_cached_roles)) {
return $this->_cached_roles[$role_id];
}
if (USE_PFO_RBAC) {
$res = db_query_params('SELECT c.class_name, r.home_group_id FROM pfo_role r, pfo_role_class c WHERE r.role_class = c.class_id AND r.role_id = $1', array($role_id));
if (!$res || !db_numrows($res)) {
return NULL;
}
$class_id = db_result($res, 0, 'class_name');
switch ($class_id) {
case 'PFO_RoleExplicit':
$group_id = db_result($res, 0, 'home_group_id');
$group = group_get_object($group_id);
$this->_cached_roles[$role_id] = new Role($group, $role_id);
return $this->_cached_roles[$role_id];
case 'PFO_RoleAnonymous':
$this->_cached_roles[$role_id] = RoleAnonymous::getInstance();
return $this->_cached_roles[$role_id];
case 'PFO_RoleLoggedIn':
$this->_cached_roles[$role_id] = RoleLoggedIn::getInstance();
return $this->_cached_roles[$role_id];
default:
throw new Exception("Not implemented");
}
} else {
$res = db_query_params('SELECT group_id FROM role r WHERE role_id = $1', array($role_id));
if (!$res || !db_numrows($res)) {
return NULL;
}
$group_id = db_result($res, 0, 'group_id');
$group = group_get_object($group_id);
return new Role($group, $role_id);
}
}
