feat: Merge ginger/oauth

src/web/extract.rs

@@ -0,0 +1,48 @@
+use axum::{
+	extract::{FromRequest, FromRequestParts, Request},
+	http::{Method, request::Parts},
+};
+use serde::de::DeserializeOwned;
+
+use crate::WebError;
+
+/// An extractor which deserializes a struct from a POST request's body.
+/// For GET requests the struct will be None.
+#[derive(Debug, Clone, Copy, Default)]
+#[must_use]
+pub(crate) struct PostForm<T>(pub Option<T>);
+
+impl<T, S> FromRequest<S> for PostForm<T>
+where
+	T: DeserializeOwned,
+	S: Send + Sync,
+{
+	type Rejection = WebError;
+
+	async fn from_request(req: Request, state: &S) -> Result<Self, Self::Rejection> {
+		if req.method() == Method::POST {
+			let axum::Form(data) = axum::Form::from_request(req, state).await?;
+
+			Ok(Self(Some(data)))
+		} else {
+			Ok(Self(None))
+		}
+	}
+}
+
+/// An extractor which wraps another extractor and converts its errors into
+/// `WebError`s.
+pub(crate) struct Expect<E>(pub E);
+
+impl<E, S, R> FromRequestParts<S> for Expect<E>
+where
+	E: FromRequestParts<S, Rejection = R>,
+	WebError: From<R>,
+	S: Send + Sync,
+{
+	type Rejection = WebError;
+
+	async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
+		Ok(Self(E::from_request_parts(parts, state).await?))
+	}
+}