Split login case bodies into handlers.

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

src/api/client/session/password.rs

@@ -1,8 +1,60 @@
-use futures::TryFutureExt;
-use ruma::{OwnedUserId, UserId};
+use futures::{FutureExt, TryFutureExt};
+use ruma::{
+	OwnedUserId, UserId,
+	api::client::{
+		session::login::v3::{Password, Request},
+		uiaa,
+	},
+};
 use tuwunel_core::{Err, Result, debug_error, err, utils::hash};
 use tuwunel_service::Services;
 
+use super::ldap_login;
+use crate::Ruma;
+
+pub(super) async fn handle_login(
+	services: &Services,
+	body: &Ruma<Request>,
+	info: &Password,
+) -> Result<OwnedUserId> {
+	#[allow(deprecated)]
+	let Password { identifier, password, user, .. } = info;
+
+	let user_id = if let Some(uiaa::UserIdentifier::UserIdOrLocalpart(user_id)) = identifier {
+		UserId::parse_with_server_name(user_id, &services.config.server_name)
+	} else if let Some(user) = user {
+		UserId::parse_with_server_name(user, &services.config.server_name)
+	} else {
+		return Err!(Request(Unknown(debug_warn!(
+			?body.login_info,
+			"Valid identifier or username was not provided (invalid or unsupported login type?)"
+		))));
+	}
+	.map_err(|e| err!(Request(InvalidUsername(warn!("Username is invalid: {e}")))))?;
+
+	let lowercased_user_id = UserId::parse_with_server_name(
+		user_id.localpart().to_lowercase(),
+		&services.config.server_name,
+	)?;
+
+	let user_is_remote = !services.globals.user_is_local(&user_id)
+		|| !services
+			.globals
+			.user_is_local(&lowercased_user_id);
+
+	if user_is_remote {
+		return Err!(Request(Unknown("User ID does not belong to this homeserver")));
+	}
+
+	if cfg!(feature = "ldap") && services.config.ldap.enable {
+		ldap_login(services, &user_id, &lowercased_user_id, password)
+			.boxed()
+			.await
+	} else {
+		password_login(services, &user_id, &lowercased_user_id, password).await
+	}
+}
+
 /// Authenticates the given user by its ID and its password.
 ///
 /// Returns the user ID if successful, and an error otherwise.