feat: Only inject vias when manual ones aren't provided during join

The Fedora RPM packaging files added in PR #950 weren't passing pre-commit
checks, causing CI failures for any branches rebased after that merge. This
applies prek linting fixes (typo correction, trailing whitespace removal,
and EOF newline) to ensure CI passes for all contributors.

fedora/continuwuity.spec.rpkg

@@ -38,7 +38,7 @@ sed -i 's/^offline = true$//' .cargo/config.toml
 %cargo_build
 
 # Here's the one legally required mystery incantation in this file.
-# Some of our dependencies have source files which are (for some reason) marked as excutable.
+# Some of our dependencies have source files which are (for some reason) marked as executable.
 # Files in .cargo/registry/ are copied into /usr/src/ by the debuginfo machinery
 # at the end of the build step, and then the BRP shebang mangling script checks
 # the entire buildroot to find executable files, and fails the build because

src/admin/user/commands.rs

@@ -1,8 +1,8 @@
 use std::{collections::BTreeMap, fmt::Write as _};
 
 use api::client::{
-	full_user_deactivate, join_room_by_id_helper, leave_all_rooms, leave_room, update_avatar_url,
-	update_displayname,
+	full_user_deactivate, join_room_by_id_helper, leave_all_rooms, leave_room, remote_leave_room,
+	update_avatar_url, update_displayname,
 };
 use conduwuit::{
 	Err, Result, debug, debug_warn, error, info, is_equal_to,
@@ -926,3 +926,29 @@ pub(super) async fn redact_event(&self, event_id: OwnedEventId) -> Result {
 	))
 	.await
 }
+
+#[admin_command]
+pub(super) async fn force_leave_remote_room(
+	&self,
+	user_id: String,
+	room_id: OwnedRoomOrAliasId,
+) -> Result {
+	let user_id = parse_local_user_id(self.services, &user_id)?;
+	let (room_id, _) = self
+		.services
+		.rooms
+		.alias
+		.resolve_with_servers(&room_id, None)
+		.await?;
+
+	assert!(
+		self.services.globals.user_is_local(&user_id),
+		"Parsed user_id must be a local user"
+	);
+	remote_leave_room(self.services, &user_id, &room_id, None)
+		.boxed()
+		.await?;
+
+	self.write_str(&format!("{user_id} has been joined to {room_id}.",))
+		.await
+}

src/admin/user/mod.rs

@@ -103,6 +103,12 @@ pub enum UserCommand {
 		room_id: OwnedRoomOrAliasId,
 	},
 
+	/// - Manually leave a remote room for a local user.
+	ForceLeaveRemoteRoom {
+		user_id: String,
+		room_id: OwnedRoomOrAliasId,
+	},
+
 	/// - Forces the specified user to drop their power levels to the room
 	///   default, if their permissions allow and the auth check permits
 	ForceDemote {

src/api/client/membership/join.rs

@@ -156,6 +156,8 @@ pub(crate) async fn join_room_by_id_or_alias_route(
 			.await?;
 
 			let mut servers = body.via.clone();
+			if servers.is_empty() {
+				debug!("No via servers provided for join, injecting some.");
 				servers.extend(
 					services
 						.rooms
@@ -182,6 +184,7 @@ pub(crate) async fn join_room_by_id_or_alias_route(
 				if let Some(server) = room_id.server_name() {
 					servers.push(server.to_owned());
 				}
+			}
 
 			servers.sort_unstable();
 			servers.dedup();

src/api/client/membership/leave.rs

@@ -215,7 +215,7 @@ pub async fn leave_room(
 	Ok(())
 }
 
-async fn remote_leave_room(
+pub async fn remote_leave_room(
 	services: &Services,
 	user_id: &UserId,
 	room_id: &RoomId,

src/api/client/membership/mod.rs

@@ -29,7 +29,7 @@ pub(crate) use self::{
 };
 pub use self::{
 	join::join_room_by_id_helper,
-	leave::{leave_all_rooms, leave_room},
+	leave::{leave_all_rooms, leave_room, remote_leave_room},
 };
 use crate::{Ruma, client::full_user_deactivate};
 

src/api/client/mod.rs

@@ -55,7 +55,7 @@ pub(super) use keys::*;
 pub(super) use media::*;
 pub(super) use media_legacy::*;
 pub(super) use membership::*;
-pub use membership::{join_room_by_id_helper, leave_all_rooms, leave_room};
+pub use membership::{join_room_by_id_helper, leave_all_rooms, leave_room, remote_leave_room};
 pub(super) use message::*;
 pub(super) use openid::*;
 pub(super) use presence::*;