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use std::future::Future;
use crate::{Endpoint, IntoResponse, Request, Result};
pub struct MapErr<E, F> {
inner: E,
f: F,
}
impl<E, F> MapErr<E, F> {
#[inline]
pub(crate) fn new(inner: E, f: F) -> MapErr<E, F> {
Self { inner, f }
}
}
#[async_trait::async_trait]
impl<E, F, Fut, InErr, OutErr, R> Endpoint for MapErr<E, F>
where
E: Endpoint<Output = Result<R, InErr>>,
InErr: IntoResponse,
OutErr: IntoResponse,
F: Fn(InErr) -> Fut + Send + Sync,
Fut: Future<Output = OutErr> + Send,
R: IntoResponse,
{
type Output = Result<R, OutErr>;
async fn call(&self, req: Request) -> Self::Output {
match self.inner.call(req).await {
Ok(resp) => Ok(resp),
Err(err) => Err((self.f)(err).await),
}
}
}