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use std::any::Any;
use std::fmt::Debug;
use std::sync::Arc;
use futures::future::FutureObj;
use crate::{configuration::Store, router::EndpointData, Request, Response, RouteMatch};
mod default_headers;
pub mod logger;
pub use self::default_headers::DefaultHeaders;
pub trait Middleware<Data>: Send + Sync {
fn handle<'a>(&'a self, ctx: RequestContext<'a, Data>) -> FutureObj<'a, Response>;
}
impl<Data, F> Middleware<Data> for F
where
F: Send + Sync + Fn(RequestContext<Data>) -> FutureObj<Response>,
{
fn handle<'a>(&'a self, ctx: RequestContext<'a, Data>) -> FutureObj<'a, Response> {
(self)(ctx)
}
}
pub struct RequestContext<'a, Data> {
pub app_data: Data,
pub req: Request,
pub params: Option<RouteMatch<'a>>,
pub(crate) endpoint: &'a EndpointData<Data>,
pub(crate) next_middleware: &'a [Arc<dyn Middleware<Data> + Send + Sync>],
}
impl<'a, Data: Clone + Send> RequestContext<'a, Data> {
pub fn get_item<T: Any + Debug + Clone + Send + Sync>(&self) -> Option<&T> {
self.endpoint.store.read::<T>()
}
pub fn store(&self) -> &Store {
&self.endpoint.store
}
pub fn next(mut self) -> FutureObj<'a, Response> {
if let Some((current, next)) = self.next_middleware.split_first() {
self.next_middleware = next;
current.handle(self)
} else {
FutureObj::new(Box::new(self.endpoint.endpoint.call(
self.app_data.clone(),
self.req,
self.params,
&self.endpoint.store,
)))
}
}
}