dedupe some state accessors in various places

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

src/api/client/directory.rs

@@ -10,11 +10,7 @@ use ruma::{
 	},
 	directory::{Filter, PublicRoomJoinRule, PublicRoomsChunk, RoomNetwork},
 	events::{
-		room::{
-			avatar::RoomAvatarEventContent,
-			create::RoomCreateEventContent,
-			join_rules::{JoinRule, RoomJoinRulesEventContent},
-		},
+		room::join_rules::{JoinRule, RoomJoinRulesEventContent},
 		StateEventType,
 	},
 	uint, ServerName, UInt,
@@ -256,15 +252,10 @@ pub(crate) async fn get_public_rooms_filtered_helper(
 				avatar_url: services()
 					.rooms
 					.state_accessor
-					.room_state_get(&room_id, &StateEventType::RoomAvatar, "")?
-					.map(|s| {
-						serde_json::from_str(s.content.get())
-							.map(|c: RoomAvatarEventContent| c.url)
-							.map_err(|_| Error::bad_database("Invalid room avatar event in database."))
-					})
-					.transpose()?
-					// url is now an Option<String> so we must flatten
-					.flatten(),
+					.get_avatar(&room_id)?
+					.into_option()
+					.unwrap_or_default()
+					.url,
 				join_rule: services()
 					.rooms
 					.state_accessor
@@ -287,15 +278,7 @@ pub(crate) async fn get_public_rooms_filtered_helper(
 				room_type: services()
 					.rooms
 					.state_accessor
-					.room_state_get(&room_id, &StateEventType::RoomCreate, "")?
-					.map(|s| {
-						serde_json::from_str::<RoomCreateEventContent>(s.content.get()).map_err(|e| {
-							error!("Invalid room create event in database: {}", e);
-							Error::BadDatabase("Invalid room create event in database.")
-						})
-					})
-					.transpose()?
-					.and_then(|e| e.room_type),
+					.get_room_type(&room_id)?,
 				room_id,
 			};
 			Ok(chunk)

src/api/client/unstable.rs

@@ -106,7 +106,8 @@ pub(crate) async fn get_room_summary(
 		canonical_alias: services()
 			.rooms
 			.state_accessor
-			.get_canonical_alias(&room_id)?,
+			.get_canonical_alias(&room_id)
+			.unwrap_or(None),
 		avatar_url: services()
 			.rooms
 			.state_accessor

src/service/rooms/spaces/mod.rs

@@ -19,13 +19,7 @@ use ruma::{
 		},
 	},
 	events::{
-		room::{
-			avatar::RoomAvatarEventContent,
-			canonical_alias::RoomCanonicalAliasEventContent,
-			create::RoomCreateEventContent,
-			join_rules::{JoinRule, RoomJoinRulesEventContent},
-			topic::RoomTopicEventContent,
-		},
+		room::join_rules::{JoinRule, RoomJoinRulesEventContent},
 		space::child::{HierarchySpaceChildEvent, SpaceChildEventContent},
 		StateEventType,
 	},
@@ -409,19 +403,20 @@ impl Service {
 			canonical_alias: services()
 				.rooms
 				.state_accessor
-				.room_state_get(room_id, &StateEventType::RoomCanonicalAlias, "")?
-				.map_or(Ok(None), |s| {
-					serde_json::from_str(s.content.get())
-						.map(|c: RoomCanonicalAliasEventContent| c.alias)
-						.map_err(|_| Error::bad_database("Invalid canonical alias event in database."))
-				})?,
-			name: services().rooms.state_accessor.get_name(room_id)?,
+				.get_canonical_alias(room_id)
+				.unwrap_or(None),
+			name: services()
+				.rooms
+				.state_accessor
+				.get_name(room_id)
+				.unwrap_or(None),
 			num_joined_members: services()
 				.rooms
 				.state_cache
-				.room_joined_count(room_id)?
+				.room_joined_count(room_id)
+				.unwrap_or_default()
 				.unwrap_or_else(|| {
-					warn!("Room {} has no member count", room_id);
+					warn!("Room {room_id} has no member count");
 					0
 				})
 				.try_into()
@@ -430,42 +425,19 @@ impl Service {
 			topic: services()
 				.rooms
 				.state_accessor
-				.room_state_get(room_id, &StateEventType::RoomTopic, "")?
-				.map_or(Ok(None), |s| {
-					serde_json::from_str(s.content.get())
-						.map(|c: RoomTopicEventContent| Some(c.topic))
-						.map_err(|_| {
-							error!("Invalid room topic event in database for room {}", room_id);
-							Error::bad_database("Invalid room topic event in database.")
-						})
-				})?,
+				.get_room_topic(room_id)
+				.unwrap_or(None),
 			world_readable: services().rooms.state_accessor.is_world_readable(room_id)?,
 			guest_can_join: services().rooms.state_accessor.guest_can_join(room_id)?,
 			avatar_url: services()
 				.rooms
 				.state_accessor
-                .room_state_get(room_id, &StateEventType::RoomAvatar, "")?
-                .map(|s| {
-                    serde_json::from_str(s.content.get())
-                        .map(|c: RoomAvatarEventContent| c.url)
-                        .map_err(|_| Error::bad_database("Invalid room avatar event in database."))
-                })
-                .transpose()?
-                // url is now an Option<String> so we must flatten
-                .flatten(),
+				.get_avatar(room_id)?
+				.into_option()
+				.unwrap_or_default()
+				.url,
 			join_rule,
-			room_type: services()
-				.rooms
-				.state_accessor
-				.room_state_get(room_id, &StateEventType::RoomCreate, "")?
-				.map(|s| {
-					serde_json::from_str::<RoomCreateEventContent>(s.content.get()).map_err(|e| {
-						error!("Invalid room create event in database: {}", e);
-						Error::BadDatabase("Invalid room create event in database.")
-					})
-				})
-				.transpose()?
-				.and_then(|e| e.room_type),
+			room_type: services().rooms.state_accessor.get_room_type(room_id)?,
 			children_state,
 			allowed_room_ids,
 		})

src/service/rooms/state_accessor/mod.rs

@@ -422,10 +422,10 @@ impl Service {
 			)
 	}
 
-	/// Returns the join rule for a given room
-	pub fn get_join_rule(&self, current_room: &RoomId) -> Result<(SpaceRoomJoinRule, Vec<OwnedRoomId>), Error> {
+	/// Returns the join rule (`SpaceRoomJoinRule`) for a given room
+	pub fn get_join_rule(&self, room_id: &RoomId) -> Result<(SpaceRoomJoinRule, Vec<OwnedRoomId>), Error> {
 		Ok(self
-			.room_state_get(current_room, &StateEventType::RoomJoinRules, "")?
+			.room_state_get(room_id, &StateEventType::RoomJoinRules, "")?
 			.map(|s| {
 				serde_json::from_str(s.content.get())
 					.map(|c: RoomJoinRulesEventContent| {