/** * This function checks that if the given extension has provided Fields, * Data Sources or Events, that they aren't in use before the extension * is uninstalled or disabled. This prevents exceptions from occurring when * accessing an object that was using something provided by this Extension * can't anymore because it has been removed. * * @param Extension $obj * An extension object * @return boolean */ private static function __canUninstallOrDisable(Extension $obj) { $extension_handle = strtolower(preg_replace('/^extension_/i', NULL, get_class($obj))); $about = self::about($extension_handle); // Fields: if (is_dir(EXTENSIONS . "/{$extension_handle}/fields")) { foreach (glob(EXTENSIONS . "/{$extension_handle}/fields/field.*.php") as $file) { $type = preg_replace(array('/^field\\./i', '/\\.php$/i'), NULL, basename($file)); if (FieldManager::isFieldUsed($type)) { throw new Exception(__('The field ‘%s’, provided by the Extension ‘%s’, is currently in use.', array(basename($file), $about['name'])) . ' ' . __("Please remove it from your sections prior to uninstalling or disabling.")); } } } // Data Sources: if (is_dir(EXTENSIONS . "/{$extension_handle}/data-sources")) { foreach (glob(EXTENSIONS . "/{$extension_handle}/data-sources/data.*.php") as $file) { $handle = preg_replace(array('/^data\\./i', '/\\.php$/i'), NULL, basename($file)); if (PageManager::isDataSourceUsed($handle)) { throw new Exception(__('The Data Source ‘%s’, provided by the Extension ‘%s’, is currently in use.', array(basename($file), $about['name'])) . ' ' . __("Please remove it from your pages prior to uninstalling or disabling.")); } } } // Events if (is_dir(EXTENSIONS . "/{$extension_handle}/events")) { foreach (glob(EXTENSIONS . "/{$extension_handle}/events/event.*.php") as $file) { $handle = preg_replace(array('/^event\\./i', '/\\.php$/i'), NULL, basename($file)); if (PageManager::isEventUsed($handle)) { throw new Exception(__('The Event ‘%s’, provided by the Extension ‘%s’, is currently in use.', array(basename($file), $about['name'])) . ' ' . __("Please remove it from your pages prior to uninstalling or disabling.")); } } } // Text Formatters if (is_dir(EXTENSIONS . "/{$extension_handle}/text-formatters")) { foreach (glob(EXTENSIONS . "/{$extension_handle}/text-formatters/formatter.*.php") as $file) { $handle = preg_replace(array('/^formatter\\./i', '/\\.php$/i'), NULL, basename($file)); if (FieldManager::isTextFormatterUsed($handle)) { throw new Exception(__('The Text Formatter ‘%s’, provided by the Extension ‘%s’, is currently in use.', array(basename($file), $about['name'])) . ' ' . __("Please remove it from your fields prior to uninstalling or disabling.")); } } } }