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use std::marker::PhantomData;
use super::NewService;
pub enum MappedConfig<'a, T> {
Ref(&'a T),
Owned(T),
}
pub struct MapConfig<A, F, C> {
a: A,
f: F,
e: PhantomData<C>,
}
impl<A, F, C> MapConfig<A, F, C> {
pub fn new(a: A, f: F) -> Self
where
A: NewService,
F: Fn(&C) -> MappedConfig<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> NewService for MapConfig<A, F, C>
where
A: NewService,
F: Fn(&C) -> MappedConfig<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 {
match (self.f)(cfg) {
MappedConfig::Ref(cfg) => self.a.new_service(cfg),
MappedConfig::Owned(cfg) => self.a.new_service(&cfg),
}
}
}
pub struct UnitConfig<A, C> {
a: A,
e: PhantomData<C>,
}
impl<A, C> UnitConfig<A, C> {
pub fn new(a: A) -> Self
where
A: NewService<Config = ()>,
{
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> NewService for UnitConfig<A, C>
where
A: NewService<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(&())
}
}