libvault 0.2.2

the libvault is modified from RustyVault
Documentation 
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use std::{future::Future, pin::Pin, sync::Arc, time::Duration};

use derive_more::{Deref, DerefMut};
use serde::{Deserialize, Serialize};
use serde_json::{Map, Value};

use super::{Backend, Request, Response, lease::Lease};
use crate::errors::RvError;

type SecretOperationHandler = dyn for<'a> Fn(
        &'a dyn Backend,
        &'a mut Request,
    ) -> Pin<Box<dyn Future<Output = Result<Option<Response>, RvError>> + Send + 'a>>
    + Send
    + Sync;

#[derive(Debug, Clone, Eq, Default, PartialEq, Serialize, Deserialize, Deref, DerefMut)]
pub struct SecretData {
    #[deref]
    #[deref_mut]
    #[serde(flatten)]
    pub lease: Lease,
    pub lease_id: String,
    #[serde(default)]
    pub internal_data: Map<String, Value>,
}

#[derive(Clone)]
pub struct Secret {
    pub secret_type: String,
    pub default_duration: Duration,
    pub renew_handler: Option<Arc<SecretOperationHandler>>,
    pub revoke_handler: Option<Arc<SecretOperationHandler>>,
}

impl Secret {
    pub fn new() -> Self {
        Self {
            secret_type: String::new(),
            default_duration: Duration::from_secs(0),
            renew_handler: None,
            revoke_handler: None,
        }
    }

    pub fn builder() -> SecretBuilder {
        SecretBuilder::new()
    }
}

impl Default for Secret {
    fn default() -> Self {
        Self::new()
    }
}

impl Secret {
    pub fn renewable(&self) -> bool {
        self.renew_handler.is_some()
    }

    pub fn response(
        &self,
        data: Option<Map<String, Value>>,
        internal: Option<Map<String, Value>>,
    ) -> Response {
        let mut lease = Lease::default();
        lease.ttl = self.default_duration;
        lease.renewable = self.renewable();

        let mut secret = SecretData {
            lease,
            lease_id: String::new(),
            internal_data: Map::new(),
        };

        if let Some(internal) = &internal {
            secret.internal_data.clone_from(internal);
        }

        secret.internal_data.insert(
            "secret_type".to_owned(),
            Value::String(self.secret_type.clone()),
        );

        let mut resp = Response::default();
        resp.data = data;
        resp.secret = Some(secret);
        resp
    }

    pub async fn renew(
        &self,
        backend: &dyn Backend,
        req: &mut Request,
    ) -> Result<Option<Response>, RvError> {
        if !self.renewable() || self.renew_handler.is_none() {
            return Err(RvError::ErrLogicalOperationUnsupported);
        }

        (self.renew_handler.as_ref().unwrap())(backend, req).await
    }

    pub async fn revoke(
        &self,
        backend: &dyn Backend,
        req: &mut Request,
    ) -> Result<Option<Response>, RvError> {
        if self.revoke_handler.is_none() {
            return Err(RvError::ErrLogicalOperationUnsupported);
        }

        (self.revoke_handler.as_ref().unwrap())(backend, req).await
    }
}

#[derive(Default, Clone)]
pub struct SecretBuilder {
    secret: Secret,
}

impl SecretBuilder {
    pub fn new() -> Self {
        Self {
            secret: Secret::new(),
        }
    }

    pub fn secret_type(mut self, secret_type: impl Into<String>) -> Self {
        self.secret.secret_type = secret_type.into();
        self
    }

    pub fn default_duration(mut self, duration: Duration) -> Self {
        self.secret.default_duration = duration;
        self
    }

    pub fn default_duration_secs(mut self, duration_secs: u64) -> Self {
        self.secret.default_duration = Duration::from_secs(duration_secs);
        self
    }

    pub fn renew_handler<H>(mut self, handler: H) -> Self
    where
        H: for<'a> Fn(
                &'a dyn Backend,
                &'a mut Request,
            ) -> Pin<
                Box<dyn Future<Output = Result<Option<Response>, RvError>> + Send + 'a>,
            > + Send
            + Sync
            + 'static,
    {
        self.secret.renew_handler = Some(Arc::new(handler));
        self
    }

    pub fn revoke_handler<H>(mut self, handler: H) -> Self
    where
        H: for<'a> Fn(
                &'a dyn Backend,
                &'a mut Request,
            ) -> Pin<
                Box<dyn Future<Output = Result<Option<Response>, RvError>> + Send + 'a>,
            > + Send
            + Sync
            + 'static,
    {
        self.secret.revoke_handler = Some(Arc::new(handler));
        self
    }
    pub fn build(self) -> Secret {
        self.secret
    }

    pub fn build_arc(self) -> Arc<Secret> {
        Arc::new(self.secret)
    }
}