/**
* Remove an extension from a class.
*
* Keep in mind that this won't revert any datamodel additions
* of the extension at runtime, unless its used before the
* schema building kicks in (in your _config.php).
* Doesn't remove the extension from any {@link Object}
* instances which are already created, but will have an
* effect on new extensions.
* Clears any previously created singletons through {@link singleton()}
* to avoid side-effects from stale extension information.
*
* @todo Add support for removing extensions with parameters
*
* @param string $extension class name of an {@link Extension} subclass, without parameters
*/
public static function remove_extension($extension)
{
$class = get_called_class();
Config::inst()->remove($class, 'extensions', Config::anything(), $extension);
// remove any instances of the extension with parameters
$config = Config::inst()->get($class, 'extensions');
if ($config) {
foreach ($config as $k => $v) {
// extensions with parameters will be stored in config as
// ExtensionName("Param").
if (preg_match(sprintf("/^(%s)\\(/", preg_quote($extension, '/')), $v)) {
Config::inst()->remove($class, 'extensions', Config::anything(), $v);
}
}
}
Config::inst()->extraConfigSourcesChanged($class);
// unset singletons to avoid side-effects
Injector::inst()->unregisterAllObjects();
// unset some caches
$subclasses = ClassInfo::subclassesFor($class);
$subclasses[] = $class;
if ($subclasses) {
foreach ($subclasses as $subclass) {
unset(self::$classes_constructed[$subclass]);
unset(self::$extra_methods[$subclass]);
}
}
}
