use std::{fmt, marker::PhantomData};
use super::ServiceFactory;
pub struct MapInitErr<A, R, C, F, E> {
a: A,
f: F,
e: PhantomData<fn(R, C) -> E>,
}
impl<A, R, C, F, E> MapInitErr<A, R, C, F, E>
where
A: ServiceFactory<R, C>,
F: Fn(A::InitError) -> E,
{
pub(crate) fn new(a: A, f: F) -> Self {
Self {
a,
f,
e: PhantomData,
}
}
}
impl<A, R, C, F, E> Clone for MapInitErr<A, R, C, F, E>
where
A: Clone,
F: Clone,
{
fn clone(&self) -> Self {
Self {
a: self.a.clone(),
f: self.f.clone(),
e: PhantomData,
}
}
}
impl<A, R, C, F, E> fmt::Debug for MapInitErr<A, R, C, F, E>
where
A: fmt::Debug,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("MapInitErr")
.field("service", &self.a)
.field("map", &std::any::type_name::<F>())
.finish()
}
}
impl<A, R, C, F, E> ServiceFactory<R, C> for MapInitErr<A, R, C, F, E>
where
A: ServiceFactory<R, C>,
F: Fn(A::InitError) -> E + Clone,
{
type Response = A::Response;
type Error = A::Error;
type Service = A::Service;
type InitError = E;
#[inline]
async fn create(&self, cfg: C) -> Result<Self::Service, Self::InitError> {
self.a.create(cfg).await.map_err(|e| (self.f)(e))
}
}
#[cfg(test)]
mod tests {
use crate::{chain_factory, fn_factory_with_config, into_service, ServiceFactory};
#[ntex::test]
async fn map_init_err() {
let factory = chain_factory(fn_factory_with_config(|err: &bool| {
let err = *err;
async move {
if err {
Err(())
} else {
Ok(into_service(|i: usize| async move { Ok::<_, ()>(i * 2) }))
}
}
}))
.map_init_err(|_| std::io::Error::new(std::io::ErrorKind::Other, "err"))
.clone();
assert!(factory.create(&true).await.is_err());
assert!(factory.create(&false).await.is_ok());
format!("{:?}", factory);
}
#[ntex::test]
async fn map_init_err2() {
let factory = fn_factory_with_config(|err: &bool| {
let err = *err;
async move {
if err {
Err(())
} else {
Ok(into_service(|i: usize| async move { Ok::<_, ()>(i * 2) }))
}
}
})
.map_init_err(|_| std::io::Error::new(std::io::ErrorKind::Other, "err"))
.clone();
assert!(factory.create(&true).await.is_err());
assert!(factory.create(&false).await.is_ok());
format!("{:?}", factory);
}
}