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use std::marker::PhantomData;
use super::{IntoServiceFactory, ServiceFactory};
pub fn map_config<T, U, F, C>(factory: U, f: F) -> MapConfig<T, F, C>
where
T: ServiceFactory,
U: IntoServiceFactory<T>,
F: Fn(C) -> T::Config,
{
MapConfig::new(factory.into_factory(), f)
}
pub fn unit_config<T, U, C>(factory: U) -> UnitConfig<T, C>
where
T: ServiceFactory<Config = ()>,
U: IntoServiceFactory<T>,
{
UnitConfig::new(factory.into_factory())
}
pub struct MapConfig<A, F, C> {
a: A,
f: F,
e: PhantomData<C>,
}
impl<A, F, C> MapConfig<A, F, C> {
pub(crate) fn new(a: A, f: F) -> Self
where
A: ServiceFactory,
F: Fn(C) -> A::Config,
{
Self {
a,
f,
e: PhantomData,
}
}
}
impl<A, F, C> Clone for MapConfig<A, F, C>
where
A: Clone,
F: Clone,
{
fn clone(&self) -> Self {
Self {
a: self.a.clone(),
f: self.f.clone(),
e: PhantomData,
}
}
}
impl<A, F, C> ServiceFactory for MapConfig<A, F, C>
where
A: ServiceFactory,
F: Fn(C) -> A::Config,
{
type Request = A::Request;
type Response = A::Response;
type Error = A::Error;
type Config = C;
type Service = A::Service;
type InitError = A::InitError;
type Future = A::Future;
fn new_service(&self, cfg: C) -> Self::Future {
self.a.new_service((self.f)(cfg))
}
}
pub struct UnitConfig<A, C> {
a: A,
e: PhantomData<C>,
}
impl<A, C> UnitConfig<A, C>
where
A: ServiceFactory<Config = ()>,
{
pub(crate) fn new(a: A) -> Self {
Self { a, e: PhantomData }
}
}
impl<A, C> Clone for UnitConfig<A, C>
where
A: Clone,
{
fn clone(&self) -> Self {
Self {
a: self.a.clone(),
e: PhantomData,
}
}
}
impl<A, C> ServiceFactory for UnitConfig<A, C>
where
A: ServiceFactory<Config = ()>,
{
type Request = A::Request;
type Response = A::Response;
type Error = A::Error;
type Config = C;
type Service = A::Service;
type InitError = A::InitError;
type Future = A::Future;
fn new_service(&self, _: C) -> Self::Future {
self.a.new_service(())
}
}