public function uninstall()
 {
     // check uninstall.php
     $file = $this->getAppConfigPath('uninstall');
     if (file_exists($file)) {
         include $file;
     }
     $file_db = $this->getAppPath('lib/config/db.php');
     if (file_exists($file_db)) {
         $schema = (include $file_db);
         $model = new waModel();
         foreach ($schema as $table => $fields) {
             $sql = "DROP TABLE IF EXISTS " . $table;
             $model->exec($sql);
         }
     }
     // Remove all app settings
     $app_settings_model = new waAppSettingsModel();
     $app_settings_model->del($this->application);
     $contact_settings_model = new waContactSettingsModel();
     $contact_settings_model->deleteByField('app_id', $this->application);
     // Remove all rights to app
     $contact_rights_model = new waContactRightsModel();
     $contact_rights_model->deleteByField('app_id', $this->application);
     // Remove logs
     $log_model = new waLogModel();
     $log_model->deleteByField('app_id', $this->application);
     // Remove cache
     waFiles::delete($this->getPath('cache') . '/apps/' . $this->application);
 }