Yii RBAC bizrules with data example

BizRule.php

class BizRule
{
    /**
     * Compares the data structure of AuthItem and AuthAssignment
     * Attach this Bizrule to be an AuthItem, to compare the data structure of the AuthItem and
     * assignment specified in itemname.
     *
     * @param $params
     * @param $data
     * @param $itemname
     *
     * @return bool
     */
    static public function compareKeys($params, $data, $itemname)
    {
        $assignment = Yii::app()->authManager->getAuthAssignment($itemname, $params['userId']);
        foreach ($data AS $key => $value) {
            if (empty($assignment->data[$key])) {
                return false;
            }
        }
        return true;
    }

    /**
     * Check if the assignment has a a data key 'language' which matches the application language
     *
     * @param $params
     * @param $data
     *
     * @return bool
     */
    static public function compareApplicationLanguage($params, $data)
    {
        //
        if (isset($data['language']) && $data['language'] == Yii::app()->language) {
            return true;
        } else {
            return false;
        }
    }
}