use std::future::Future;
use crate::{Endpoint, Request, Result};
/// Endpoint for the [`before`](super::EndpointExt::before) method.
pub struct Before<E, F> {
inner: E,
f: F,
}
impl<E, F> Before<E, F> {
#[inline]
pub(crate) fn new(inner: E, f: F) -> Before<E, F> {
Self { inner, f }
}
}
impl<E, F, Fut> Endpoint for Before<E, F>
where
E: Endpoint,
F: Fn(Request) -> Fut + Send + Sync,
Fut: Future<Output = Result<Request>> + Send,
{
type Output = E::Output;
async fn call(&self, req: Request) -> Result<Self::Output> {
self.inner.call((self.f)(req).await?).await
}
}