torc 0.22.1

Workflow management system
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use crate::server::auth::AuthenticationApi;
use crate::server::transport_types::auth_types::{AuthData, Authorization};
use crate::server::transport_types::context_types::{Push, XSpanIdString};
use axum::http::Request;
use futures::future::BoxFuture;
use std::default::Default;
use std::marker::PhantomData;
use std::task::{Context, Poll};
use tower::Service;

pub struct MakeAddContext<T, A> {
    inner: T,
    marker: PhantomData<A>,
}

impl<T, A, B, C, D> MakeAddContext<T, A>
where
    A: Default + Push<XSpanIdString, Result = B>,
    B: Push<Option<AuthData>, Result = C>,
    C: Push<Option<Authorization>, Result = D>,
{
    pub fn new(inner: T) -> MakeAddContext<T, A> {
        MakeAddContext {
            inner,
            marker: PhantomData,
        }
    }
}

// Make a service that adds context.
impl<Target, T, A, B, C, D> Service<Target> for MakeAddContext<T, A>
where
    Target: Send,
    A: Default + Push<XSpanIdString, Result = B> + Send,
    B: Push<Option<AuthData>, Result = C>,
    C: Push<Option<Authorization>, Result = D>,
    D: Send + 'static,
    T: Service<Target> + Send,
    T::Future: Send + 'static,
{
    type Error = T::Error;
    type Response = AddContext<T::Response, A, B, C, D>;
    type Future = BoxFuture<'static, Result<Self::Response, Self::Error>>;

    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
        self.inner.poll_ready(cx)
    }

    fn call(&mut self, target: Target) -> Self::Future {
        let service = self.inner.call(target);

        Box::pin(async move { Ok(AddContext::new(service.await?)) })
    }
}

/// Middleware to add context data from the request
#[derive(Clone)]
pub struct AddContext<T, A, B, C, D>
where
    A: Default + Push<XSpanIdString, Result = B>,
    B: Push<Option<AuthData>, Result = C>,
    C: Push<Option<Authorization>, Result = D>,
{
    inner: T,
    marker: PhantomData<A>,
}

impl<T, A, B, C, D> AddContext<T, A, B, C, D>
where
    A: Default + Push<XSpanIdString, Result = B>,
    B: Push<Option<AuthData>, Result = C>,
    C: Push<Option<Authorization>, Result = D>,
{
    pub fn new(inner: T) -> Self {
        AddContext {
            inner,
            marker: PhantomData,
        }
    }
}

impl<T, A, B, C, D, ReqBody> Service<Request<ReqBody>> for AddContext<T, A, B, C, D>
where
    A: Default + Push<XSpanIdString, Result = B>,
    B: Push<Option<AuthData>, Result = C>,
    C: Push<Option<Authorization>, Result = D>,
    D: Send + 'static,
    T: Service<(Request<ReqBody>, D)> + AuthenticationApi,
{
    type Error = T::Error;
    type Future = T::Future;
    type Response = T::Response;

    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
        self.inner.poll_ready(cx)
    }

    fn call(&mut self, request: Request<ReqBody>) -> Self::Future {
        let context = A::default().push(XSpanIdString::get_or_generate(&request));
        let context = context.push(None::<AuthData>);
        let context = context.push(None::<Authorization>);

        self.inner.call((request, context))
    }
}