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    use tera::{Tera,Context};
    #[cfg(feature = "casbin")]
    use casbin::{CoreApi,Enforcer};
    #[cfg(feature = "casbin")]
    use std::{
        path::Path,
        sync::Arc,
    };
    use tokio::sync::RwLock;

    use crate::defs::{
        Config,
        SessionStoreDB,
        UserStore,
    };
    #[cfg(feature = "authstore")]
    use crate::defs::AuthStore;

    #[derive(Clone)]
    pub struct AppDBs {
        pub config: Config,
        #[cfg(feature = "authstore")]
        pub auth_store: AuthStore,
        #[cfg(feature = "casbin")]
        pub enforcer: Arc<RwLock<Enforcer>>,
        pub sessions_store_db: SessionStoreDB,
        pub user_store: UserStore,
        pub tera: Tera,
        pub context: Context,
    }
    impl AppDBs {
        #[cfg(feature = "authstore")]
        pub fn new(config: &Config, store: SessionStoreDB, user_store: UserStore, tera: Tera, context: Context) -> Self {
            Self {
                config: config.to_owned(),
                auth_store: AuthStore::new(&config.authz_store_uri),
                sessions_store_db: store,
                user_store,
                tera,
                context,
            }
        }
        #[cfg(feature = "casbin")]
        pub fn new(config: &Config, store: SessionStoreDB, user_store: UserStore, enforcer: Arc<RwLock<Enforcer>>, tera: Tera, context: Context) -> Self {
            Self {
                config: config.to_owned(),
                enforcer,
                sessions_store_db: store,
                user_store,
                tera,
                context,
            }
        }
        #[cfg(feature = "casbin")]
        pub async fn create_enforcer(model_path: &'static str, policy_path: &'static str) -> Arc<RwLock<Enforcer>> {
            if ! Path::new(&model_path).exists() {
                panic!("model path: {} not exists",&model_path);
            }
            if ! Path::new(&policy_path).exists() {
                panic!("policy path: {} not exists",&policy_path);
            }
            let e = Enforcer::new(model_path, policy_path)
                .await
                .expect("can read casbin model and policy files");
            Arc::new(RwLock::new(e))
      }
    }