simplify client event endpoint

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

src/api/client/message.rs

@@ -1,6 +1,6 @@
 use axum::extract::State;
 use conduwuit::{
-	at, is_equal_to,
+	at,
 	utils::{
 		result::{FlatOk, LogErr},
 		stream::{BroadbandExt, TryIgnore, WidebandExt},
@@ -30,7 +30,7 @@ use service::{
 use crate::Ruma;
 
 /// list of safe and common non-state events to ignore if the user is ignored
-const IGNORED_MESSAGE_TYPES: &[TimelineEventType; 17] = &[
+const IGNORED_MESSAGE_TYPES: &[TimelineEventType] = &[
 	Audio,
 	CallInvite,
 	Emote,
@@ -225,34 +225,50 @@ async fn get_member_event(
 		.ok()
 }
 
+#[inline]
 pub(crate) async fn ignored_filter(
 	services: &Services,
 	item: PdusIterItem,
 	user_id: &UserId,
 ) -> Option<PdusIterItem> {
-	let (_, pdu) = &item;
+	let (_, ref pdu) = item;
 
+	is_ignored_pdu(services, pdu, user_id)
+		.await
+		.eq(&false)
+		.then_some(item)
+}
+
+#[inline]
+pub(crate) async fn is_ignored_pdu(
+	services: &Services,
+	pdu: &PduEvent,
+	user_id: &UserId,
+) -> bool {
 	// exclude Synapse's dummy events from bloating up response bodies. clients
 	// don't need to see this.
 	if pdu.kind.to_cow_str() == "org.matrix.dummy_event" {
-		return None;
+		return true;
 	}
 
-	if IGNORED_MESSAGE_TYPES.binary_search(&pdu.kind).is_ok()
+	let ignored_type = IGNORED_MESSAGE_TYPES.binary_search(&pdu.kind).is_ok();
-		&& (services.users.user_is_ignored(&pdu.sender, user_id).await
+
-			|| services
+	let ignored_server = services
 		.server
 		.config
 		.forbidden_remote_server_names
-				.iter()
+		.contains(pdu.sender().server_name());
-				.any(is_equal_to!(pdu.sender().server_name())))
+
+	if ignored_type
+		&& (ignored_server || services.users.user_is_ignored(&pdu.sender, user_id).await)
 	{
-		return None;
+		return true;
 	}
 
-	Some(item)
+	false
 }
 
+#[inline]
 pub(crate) async fn visibility_filter(
 	services: &Services,
 	item: PdusIterItem,
@@ -268,7 +284,16 @@ pub(crate) async fn visibility_filter(
 		.then_some(item)
 }
 
+#[inline]
 pub(crate) fn event_filter(item: PdusIterItem, filter: &RoomEventFilter) -> Option<PdusIterItem> {
 	let (_, pdu) = &item;
 	pdu.matches(filter).then_some(item)
 }
+
+#[cfg_attr(debug_assertions, conduwuit::ctor)]
+fn _is_sorted() {
+	debug_assert!(
+		IGNORED_MESSAGE_TYPES.is_sorted(),
+		"IGNORED_MESSAGE_TYPES must be sorted by the developer"
+	);
+}

src/api/client/room/event.rs

@@ -1,52 +1,44 @@
 use axum::extract::State;
 use conduwuit::{err, Err, Event, Result};
-use futures::{try_join, FutureExt, TryFutureExt};
+use futures::{future::try_join, FutureExt, TryFutureExt};
 use ruma::api::client::room::get_room_event;
 
-use crate::{client::ignored_filter, Ruma};
+use crate::{client::is_ignored_pdu, Ruma};
 
 /// # `GET /_matrix/client/r0/rooms/{roomId}/event/{eventId}`
 ///
 /// Gets a single event.
 pub(crate) async fn get_room_event_route(
-	State(services): State<crate::State>,
+	State(ref services): State<crate::State>,
 	ref body: Ruma<get_room_event::v3::Request>,
 ) -> Result<get_room_event::v3::Response> {
+	let event_id = &body.event_id;
+	let room_id = &body.room_id;
+
 	let event = services
 		.rooms
 		.timeline
-		.get_pdu(&body.event_id)
+		.get_pdu(event_id)
-		.map_err(|_| err!(Request(NotFound("Event {} not found.", &body.event_id))));
+		.map_err(|_| err!(Request(NotFound("Event {} not found.", event_id))));
-
-	let token = services
-		.rooms
-		.timeline
-		.get_pdu_count(&body.event_id)
-		.map_err(|_| err!(Request(NotFound("Event not found."))));
 
 	let visible = services
 		.rooms
 		.state_accessor
-		.user_can_see_event(body.sender_user(), &body.room_id, &body.event_id)
+		.user_can_see_event(body.sender_user(), room_id, event_id)
 		.map(Ok);
 
-	let (token, mut event, visible) = try_join!(token, event, visible)?;
+	let (mut event, visible) = try_join(event, visible).await?;
 
-	if !visible
+	if !visible || is_ignored_pdu(services, &event, body.sender_user()).await {
-		|| ignored_filter(&services, (token, event.clone()), body.sender_user())
-			.await
-			.is_none()
-	{
 		return Err!(Request(Forbidden("You don't have permission to view this event.")));
 	}
 
-	if event.event_id() != &body.event_id || event.room_id() != body.room_id {
+	debug_assert!(
-		return Err!(Request(NotFound("Event not found")));
+		event.event_id() == event_id && event.room_id() == room_id,
-	}
+		"Fetched PDU must match requested"
+	);
 
 	event.add_age().ok();
 
-	let event = event.to_room_event();
+	Ok(get_room_event::v3::Response { event: event.to_room_event() })
-
-	Ok(get_room_event::v3::Response { event })
 }

src/core/pdu/unsigned.rs

@@ -9,11 +9,13 @@ use crate::{err, implement, is_true, Result};
 
 #[implement(Pdu)]
 pub fn remove_transaction_id(&mut self) -> Result {
+	use BTreeMap as Map;
+
 	let Some(unsigned) = &self.unsigned else {
 		return Ok(());
 	};
 
-	let mut unsigned: BTreeMap<String, Box<RawJsonValue>> = serde_json::from_str(unsigned.get())
+	let mut unsigned: Map<&str, Box<RawJsonValue>> = serde_json::from_str(unsigned.get())
 		.map_err(|e| err!(Database("Invalid unsigned in pdu event: {e}")))?;
 
 	unsigned.remove("transaction_id");
@@ -26,10 +28,13 @@ pub fn remove_transaction_id(&mut self) -> Result {
 
 #[implement(Pdu)]
 pub fn add_age(&mut self) -> Result {
-	let mut unsigned: BTreeMap<String, Box<RawJsonValue>> = self
+	use BTreeMap as Map;
+
+	let mut unsigned: Map<&str, Box<RawJsonValue>> = self
 		.unsigned
-		.as_ref()
+		.as_deref()
-		.map_or_else(|| Ok(BTreeMap::new()), |u| serde_json::from_str(u.get()))
+		.map(RawJsonValue::get)
+		.map_or_else(|| Ok(Map::new()), serde_json::from_str)
 		.map_err(|e| err!(Database("Invalid unsigned in pdu event: {e}")))?;
 
 	// deliberately allowing for the possibility of negative age
@@ -37,10 +42,8 @@ pub fn add_age(&mut self) -> Result {
 	let then: i128 = self.origin_server_ts.into();
 	let this_age = now.saturating_sub(then);
 
-	unsigned.insert("age".to_owned(), to_raw_value(&this_age).expect("age is valid"));
+	unsigned.insert("age", to_raw_value(&this_age)?);
-	self.unsigned = to_raw_value(&unsigned)
+	self.unsigned = Some(to_raw_value(&unsigned)?);
-		.map(Some)
-		.expect("unsigned is valid");
 
 	Ok(())
 }
@@ -51,8 +54,9 @@ pub fn add_relation(&mut self, name: &str, pdu: Option<&Pdu>) -> Result {
 
 	let mut unsigned: Map<String, JsonValue> = self
 		.unsigned
-		.as_ref()
+		.as_deref()
-		.map_or_else(|| Ok(Map::new()), |u| serde_json::from_str(u.get()))
+		.map(RawJsonValue::get)
+		.map_or_else(|| Ok(Map::new()), serde_json::from_str)
 		.map_err(|e| err!(Database("Invalid unsigned in pdu event: {e}")))?;
 
 	let pdu = pdu
@@ -64,12 +68,9 @@ pub fn add_relation(&mut self, name: &str, pdu: Option<&Pdu>) -> Result {
 		.entry("m.relations")
 		.or_insert(JsonValue::Object(Map::new()))
 		.as_object_mut()
-		.unwrap()
+		.map(|object| object.insert(name.to_owned(), pdu));
-		.insert(name.to_owned(), pdu);
 
-	self.unsigned = to_raw_value(&unsigned)
+	self.unsigned = Some(to_raw_value(&unsigned)?);
-		.map(Some)
-		.expect("unsigned is valid");
 
 	Ok(())
 }