mirror of https://gitlab.com/famedly/conduit
Nyaaori
2 years ago
commit
aca91db3f5
@ -0,0 +1,290 @@
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use std::{collections::HashSet, sync::Arc};
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use crate::{services, Error, PduEvent, Result, Ruma};
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use ruma::{
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api::client::{
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error::ErrorKind,
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space::{get_hierarchy, SpaceHierarchyRoomsChunk, SpaceRoomJoinRule},
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},
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events::{
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room::{
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avatar::RoomAvatarEventContent,
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canonical_alias::RoomCanonicalAliasEventContent,
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create::RoomCreateEventContent,
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guest_access::{GuestAccess, RoomGuestAccessEventContent},
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history_visibility::{HistoryVisibility, RoomHistoryVisibilityEventContent},
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join_rules::{JoinRule, RoomJoinRulesEventContent},
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name::RoomNameEventContent,
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topic::RoomTopicEventContent,
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},
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space::child::SpaceChildEventContent,
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StateEventType,
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},
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serde::Raw,
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MilliSecondsSinceUnixEpoch, OwnedRoomId, RoomId,
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};
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use serde_json::{self, json};
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use tracing::warn;
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use ruma::events::space::child::HierarchySpaceChildEvent;
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/// # `GET /_matrix/client/v1/rooms/{room_id}/hierarchy``
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///
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/// Paginates over the space tree in a depth-first manner to locate child rooms of a given space.
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///
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/// - TODO: Use federation for unknown room.
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///
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pub async fn get_hierarchy_route(
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body: Ruma<get_hierarchy::v1::Request>,
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) -> Result<get_hierarchy::v1::Response> {
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let sender_user = body.sender_user.as_ref().expect("user is authenticated");
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// Check if room is world readable
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let is_world_readable = services()
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.rooms
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.state_accessor
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.room_state_get(&body.room_id, &StateEventType::RoomHistoryVisibility, "")?
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.map_or(Ok(false), |s| {
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serde_json::from_str(s.content.get())
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.map(|c: RoomHistoryVisibilityEventContent| {
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c.history_visibility == HistoryVisibility::WorldReadable
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})
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.map_err(|_| {
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Error::bad_database("Invalid room history visibility event in database.")
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})
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})
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.unwrap_or(false);
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// Reject if user not in room and not world readable
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if !services()
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.rooms
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.state_cache
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.is_joined(sender_user, &body.room_id)?
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&& !is_world_readable
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{
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return Err(Error::BadRequest(
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ErrorKind::Forbidden,
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"You don't have permission to view this room.",
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));
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}
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// from format is '{suggested_only}|{max_depth}|{skip}'
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let (suggested_only, max_depth, start) = body
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.from
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.as_ref()
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.map_or(
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Some((
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body.suggested_only,
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body.max_depth
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.map_or(services().globals.hierarchy_max_depth(), |v| v.into())
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.min(services().globals.hierarchy_max_depth()),
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0,
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)),
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|from| {
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let mut p = from.split('|');
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Some((
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p.next()?.trim().parse().ok()?,
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p.next()?
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.trim()
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.parse::<u64>()
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.ok()?
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.min(services().globals.hierarchy_max_depth()),
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p.next()?.trim().parse().ok()?,
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))
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},
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)
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.ok_or(Error::BadRequest(ErrorKind::InvalidParam, "Invalid from"))?;
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let limit = body.limit.map_or(20u64, |v| v.into()) as usize;
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let mut skip = start;
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// Set for avoid search in loop.
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let mut room_set = HashSet::new();
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let mut rooms_chunk: Vec<SpaceHierarchyRoomsChunk> = vec![];
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let mut stack = vec![(0, body.room_id.clone())];
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while let (Some((depth, room_id)), true) = (stack.pop(), rooms_chunk.len() < limit) {
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let (childern, pdus): (Vec<_>, Vec<_>) = services()
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.rooms
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.state_accessor
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.room_state_full(&room_id)
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.await?
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.into_iter()
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.filter_map(|((e_type, key), pdu)| {
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(e_type == StateEventType::SpaceChild && !room_set.contains(&room_id))
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.then_some((key, pdu))
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})
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.unzip();
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if skip == 0 {
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if rooms_chunk.len() < limit {
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room_set.insert(room_id.clone());
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if let Ok(chunk) = get_room_chunk(room_id, suggested_only, pdus).await {
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rooms_chunk.push(chunk)
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};
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}
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} else {
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skip -= 1;
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}
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if depth < max_depth {
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childern.into_iter().rev().for_each(|key| {
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stack.push((depth + 1, RoomId::parse(key).unwrap()));
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});
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}
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}
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Ok(get_hierarchy::v1::Response {
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next_batch: (!stack.is_empty()).then_some(format!(
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"{}|{}|{}",
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suggested_only,
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max_depth,
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start + limit
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)),
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rooms: rooms_chunk,
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})
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}
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async fn get_room_chunk(
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room_id: OwnedRoomId,
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suggested_only: bool,
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pdus: Vec<Arc<PduEvent>>,
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) -> Result<SpaceHierarchyRoomsChunk> {
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Ok(SpaceHierarchyRoomsChunk {
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canonical_alias: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomCanonicalAlias, "")
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.ok()
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.and_then(|s| {
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serde_json::from_str(s?.content.get())
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.map(|c: RoomCanonicalAliasEventContent| c.alias)
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.ok()?
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}),
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name: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomName, "")
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.ok()
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.flatten()
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.and_then(|s| {
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serde_json::from_str(s.content.get())
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.map(|c: RoomNameEventContent| c.name)
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.ok()?
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}),
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num_joined_members: services()
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.rooms
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.state_cache
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.room_joined_count(&room_id)?
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.unwrap_or_else(|| {
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warn!("Room {} has no member count", &room_id);
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0
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})
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.try_into()
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.expect("user count should not be that big"),
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topic: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomTopic, "")
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.ok()
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.and_then(|s| {
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serde_json::from_str(s?.content.get())
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.ok()
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.map(|c: RoomTopicEventContent| c.topic)
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}),
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world_readable: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomHistoryVisibility, "")?
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.map_or(Ok(false), |s| {
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serde_json::from_str(s.content.get())
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.map(|c: RoomHistoryVisibilityEventContent| {
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c.history_visibility == HistoryVisibility::WorldReadable
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})
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.map_err(|_| {
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Error::bad_database("Invalid room history visibility event in database.")
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})
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})?,
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guest_can_join: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomGuestAccess, "")?
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.map_or(Ok(false), |s| {
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serde_json::from_str(s.content.get())
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.map(|c: RoomGuestAccessEventContent| c.guest_access == GuestAccess::CanJoin)
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.map_err(|_| {
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Error::bad_database("Invalid room guest access event in database.")
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})
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})?,
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avatar_url: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomAvatar, "")
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.ok()
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.and_then(|s| {
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serde_json::from_str(s?.content.get())
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.map(|c: RoomAvatarEventContent| c.url)
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.ok()?
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}),
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join_rule: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomJoinRules, "")?
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.map(|s| {
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serde_json::from_str(s.content.get())
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.map(|c: RoomJoinRulesEventContent| match c.join_rule {
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JoinRule::Invite => SpaceRoomJoinRule::Invite,
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JoinRule::Knock => SpaceRoomJoinRule::Knock,
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JoinRule::KnockRestricted(_) => SpaceRoomJoinRule::KnockRestricted,
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JoinRule::Private => SpaceRoomJoinRule::Private,
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JoinRule::Public => SpaceRoomJoinRule::Public,
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JoinRule::Restricted(_) => SpaceRoomJoinRule::Restricted,
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JoinRule::_Custom(_) => SpaceRoomJoinRule::from(c.join_rule.as_str()),
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})
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.map_err(|_| Error::bad_database("Invalid room join rules event in database."))
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})
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.ok_or_else(|| Error::bad_database("Invalid room join rules event in database."))??,
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room_type: services()
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.rooms
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.state_accessor
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.room_state_get(&room_id, &StateEventType::RoomCreate, "")
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.map(|s| {
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serde_json::from_str(s?.content.get())
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.map(|c: RoomCreateEventContent| c.room_type)
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.ok()?
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})
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.ok()
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.flatten(),
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children_state: pdus
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.into_iter()
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.flat_map(|pdu| {
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Some(HierarchySpaceChildEvent {
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// Ignore unsuggested rooms if suggested_only is set
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content: serde_json::from_str(pdu.content.get()).ok().filter(
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|pdu: &SpaceChildEventContent| {
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!suggested_only || pdu.suggested.unwrap_or(false)
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},
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)?,
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sender: pdu.sender.clone(),
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state_key: pdu.state_key.clone()?,
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origin_server_ts: MilliSecondsSinceUnixEpoch(pdu.origin_server_ts),
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})
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})
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.filter_map(|hsce| {
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Raw::<HierarchySpaceChildEvent>::from_json_string(
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json!(
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{
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"content": &hsce.content,
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"sender": &hsce.sender,
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"state_key": &hsce.state_key,
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"origin_server_ts": &hsce.origin_server_ts
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}
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)
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.to_string(),
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)
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.ok()
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})
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.collect::<Vec<_>>(),
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room_id,
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})
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}
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