abstract+add more "users in room" accessors, check membership state on `active_local_joined_users_in_room`

`roomuserid_joined` cf seems unreliable, so in the mean time we need to check
membership state (or maybe this is a more reliable check anyways)

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/service/rooms/state_cache/data.rs

@@ -2,7 +2,7 @@ use std::collections::HashSet;
 
 use itertools::Itertools;
 use ruma::{
-	events::{AnyStrippedStateEvent, AnySyncStateEvent},
+	events::{room::member::MembershipState, AnyStrippedStateEvent, AnySyncStateEvent},
 	serde::Raw,
 	OwnedRoomId, OwnedServerName, OwnedUserId, RoomId, ServerName, UserId,
 };
@@ -43,12 +43,23 @@ pub trait Data: Send + Sync {
 	/// know).
 	fn server_rooms<'a>(&'a self, server: &ServerName) -> Box<dyn Iterator<Item = Result<OwnedRoomId>> + 'a>;
 
-	/// Returns an iterator over all joined members of a room.
+	/// Returns an iterator of all joined members of a room.
 	fn room_members<'a>(&'a self, room_id: &RoomId) -> Box<dyn Iterator<Item = Result<OwnedUserId>> + 'a>;
 
-	/// Returns a vec of all the users joined in a room who are active
-	/// (not guests, not deactivated users)
-	fn active_local_users_in_room(&self, room_id: &RoomId) -> Vec<OwnedUserId>;
+	/// Returns an iterator of all our local users
+	/// in the room, even if they're deactivated/guests
+	fn local_users_in_room<'a>(&'a self, room_id: &RoomId) -> Box<dyn Iterator<Item = OwnedUserId> + 'a>;
+
+	/// Returns an iterator of all our local users in a room who are active (not
+	/// deactivated, not guest)
+	fn active_local_users_in_room<'a>(&'a self, room_id: &RoomId) -> Box<dyn Iterator<Item = OwnedUserId> + 'a>;
+
+	/// Returns an iterator of all our local users joined in a room who are
+	/// active (not deactivated, not guest) and have a joined membership state
+	/// in the room
+	fn active_local_joined_users_in_room<'a>(
+		&'a self, room_id: &'a RoomId,
+	) -> Box<dyn Iterator<Item = OwnedUserId> + 'a>;
 
 	fn room_joined_count(&self, room_id: &RoomId) -> Result<Option<u64>>;
 
@@ -381,7 +392,7 @@ impl Data for KeyValueDatabase {
 		}))
 	}
 
-	/// Returns an iterator over all joined members of a room.
+	/// Returns an iterator of all joined members of a room.
 	#[tracing::instrument(skip(self))]
 	fn room_members<'a>(&'a self, room_id: &RoomId) -> Box<dyn Iterator<Item = Result<OwnedUserId>> + 'a> {
 		let mut prefix = room_id.as_bytes().to_vec();
@@ -400,14 +411,43 @@ impl Data for KeyValueDatabase {
 		}))
 	}
 
-	/// Returns a vec of all our local users joined in a room who are active
-	/// (not guests / not deactivated users)
-	#[tracing::instrument(skip(self))]
-	fn active_local_users_in_room(&self, room_id: &RoomId) -> Vec<OwnedUserId> {
+	/// Returns an iterator of all our local users in the room, even if they're
+	/// deactivated/guests
+	fn local_users_in_room<'a>(&'a self, room_id: &RoomId) -> Box<dyn Iterator<Item = OwnedUserId> + 'a> {
+		Box::new(
 			self.room_members(room_id)
 				.filter_map(Result::ok)
-			.filter(|user| user_is_local(user) && !services().users.is_deactivated(user).unwrap_or(true))
-			.collect_vec()
+				.filter(|user| user_is_local(user)),
+		)
+	}
+
+	/// Returns an iterator of all our local users in a room who are active (not
+	/// deactivated, not guest)
+	#[tracing::instrument(skip(self))]
+	fn active_local_users_in_room<'a>(&'a self, room_id: &RoomId) -> Box<dyn Iterator<Item = OwnedUserId> + 'a> {
+		Box::new(
+			self.local_users_in_room(room_id)
+				.filter(|user| !services().users.is_deactivated(user).unwrap_or(true)),
+		)
+	}
+
+	/// Returns an iterator of all our local users joined in a room who are
+	/// active (not deactivated, not guest) and have a joined membership state
+	/// in the room
+	///
+	/// TODO: why is `roomuserid_joined` not reliable?
+	#[tracing::instrument(skip(self))]
+	fn active_local_joined_users_in_room<'a>(
+		&'a self, room_id: &'a RoomId,
+	) -> Box<dyn Iterator<Item = OwnedUserId> + 'a> {
+		Box::new(self.active_local_users_in_room(room_id).filter(|user_id| {
+			services()
+				.rooms
+				.state_accessor
+				.get_member(room_id, user_id)
+				.unwrap_or(None)
+				.map_or(false, |membership| membership.membership == MembershipState::Join)
+		}))
 	}
 
 	/// Returns the number of users which are currently in a room

src/service/rooms/state_cache/mod.rs

@@ -274,12 +274,29 @@ impl Service {
 	pub fn room_joined_count(&self, room_id: &RoomId) -> Result<Option<u64>> { self.db.room_joined_count(room_id) }
 
 	#[tracing::instrument(skip(self))]
-	/// Returns a vec of all the users joined in a room who are active
-	/// (not guests, not deactivated users)
-	pub fn active_local_users_in_room(&self, room_id: &RoomId) -> Vec<OwnedUserId> {
+	/// Returns an iterator of all our local users in the room, even if they're
+	/// deactivated/guests
+	pub fn local_users_in_room<'a>(&'a self, room_id: &RoomId) -> impl Iterator<Item = OwnedUserId> + 'a {
+		self.db.local_users_in_room(room_id)
+	}
+
+	#[tracing::instrument(skip(self))]
+	/// Returns an iterator of all our local users in a room who are active (not
+	/// deactivated, not guest)
+	pub fn active_local_users_in_room<'a>(&'a self, room_id: &RoomId) -> impl Iterator<Item = OwnedUserId> + 'a {
 		self.db.active_local_users_in_room(room_id)
 	}
 
+	#[tracing::instrument(skip(self))]
+	/// Returns an iterator of all our local users joined in a room who are
+	/// active (not deactivated, not guest) and have a joined membership state
+	/// in the room
+	pub fn active_local_joined_users_in_room<'a>(
+		&'a self, room_id: &'a RoomId,
+	) -> impl Iterator<Item = OwnedUserId> + 'a {
+		self.db.active_local_joined_users_in_room(room_id)
+	}
+
 	#[tracing::instrument(skip(self))]
 	pub fn room_invited_count(&self, room_id: &RoomId) -> Result<Option<u64>> { self.db.room_invited_count(room_id) }
 

src/service/rooms/timeline/mod.rs

@@ -6,6 +6,7 @@ use std::{
 };
 
 use data::Data;
+use itertools::Itertools;
 use rand::prelude::SliceRandom;
 use ruma::{
 	api::{client::error::ErrorKind, federation},
@@ -309,7 +310,8 @@ impl Service {
 		let mut push_target = services()
 			.rooms
 			.state_cache
-			.active_local_users_in_room(&pdu.room_id);
+			.active_local_joined_users_in_room(&pdu.room_id)
+			.collect_vec();
 
 		if pdu.kind == TimelineEventType::RoomMember {
 			if let Some(state_key) = &pdu.state_key {