Hot-Reloading Refactor

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/ruma_wrapper/xmatrix.rs

@@ -0,0 +1,61 @@
+use std::str;
+
+use axum_extra::headers::authorization::Credentials;
+use ruma::OwnedServerName;
+use tracing::debug;
+
+pub(crate) struct XMatrix {
+	pub(crate) origin: OwnedServerName,
+	pub(crate) destination: Option<String>,
+	pub(crate) key: String, // KeyName?
+	pub(crate) sig: String,
+}
+
+impl Credentials for XMatrix {
+	const SCHEME: &'static str = "X-Matrix";
+
+	fn decode(value: &http::HeaderValue) -> Option<Self> {
+		debug_assert!(
+			value.as_bytes().starts_with(b"X-Matrix "),
+			"HeaderValue to decode should start with \"X-Matrix ..\", received = {value:?}",
+		);
+
+		let parameters = str::from_utf8(&value.as_bytes()["X-Matrix ".len()..])
+			.ok()?
+			.trim_start();
+
+		let mut origin = None;
+		let mut destination = None;
+		let mut key = None;
+		let mut sig = None;
+
+		for entry in parameters.split_terminator(',') {
+			let (name, value) = entry.split_once('=')?;
+
+			// It's not at all clear why some fields are quoted and others not in the spec,
+			// let's simply accept either form for every field.
+			let value = value
+				.strip_prefix('"')
+				.and_then(|rest| rest.strip_suffix('"'))
+				.unwrap_or(value);
+
+			// FIXME: Catch multiple fields of the same name
+			match name {
+				"origin" => origin = Some(value.try_into().ok()?),
+				"key" => key = Some(value.to_owned()),
+				"sig" => sig = Some(value.to_owned()),
+				"destination" => destination = Some(value.to_owned()),
+				_ => debug!("Unexpected field `{name}` in X-Matrix Authorization header"),
+			}
+		}
+
+		Some(Self {
+			origin: origin?,
+			key: key?,
+			sig: sig?,
+			destination,
+		})
+	}
+
+	fn encode(&self) -> http::HeaderValue { todo!() }
+}