132 lines
3.1 KiB
Rust
132 lines
3.1 KiB
Rust
use std::{
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borrow::Borrow,
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collections::{HashMap, HashSet},
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sync::Arc,
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};
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use conduwuit::{
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debug, err, implement,
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utils::stream::{automatic_width, IterStream, WidebandExt},
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Result,
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};
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use futures::{FutureExt, StreamExt, TryFutureExt};
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use ruma::{
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state_res::{self, StateMap},
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EventId, RoomId, RoomVersionId,
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};
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use crate::rooms::state_compressor::CompressedStateEvent;
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#[implement(super::Service)]
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#[tracing::instrument(skip_all, name = "resolve")]
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pub async fn resolve_state(
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&self,
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room_id: &RoomId,
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room_version_id: &RoomVersionId,
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incoming_state: HashMap<u64, Arc<EventId>>,
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) -> Result<Arc<HashSet<CompressedStateEvent>>> {
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debug!("Loading current room state ids");
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let current_sstatehash = self
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.services
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.state
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.get_room_shortstatehash(room_id)
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.await
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.map_err(|e| err!(Database(error!("No state for {room_id:?}: {e:?}"))))?;
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let current_state_ids = self
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.services
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.state_accessor
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.state_full_ids(current_sstatehash)
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.await?;
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let fork_states = [current_state_ids, incoming_state];
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let mut auth_chain_sets = Vec::with_capacity(fork_states.len());
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for state in &fork_states {
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let starting_events = state.values().map(Borrow::borrow);
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let auth_chain: HashSet<Arc<EventId>> = self
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.services
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.auth_chain
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.get_event_ids(room_id, starting_events)
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.await?
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.into_iter()
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.collect();
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auth_chain_sets.push(auth_chain);
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}
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debug!("Loading fork states");
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let fork_states: Vec<StateMap<Arc<EventId>>> = fork_states
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.into_iter()
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.stream()
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.wide_then(|fork_state| {
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fork_state
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.into_iter()
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.stream()
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.wide_filter_map(|(k, id)| {
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self.services
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.short
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.get_statekey_from_short(k)
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.map_ok_or_else(|_| None, move |(ty, st_key)| Some(((ty, st_key), id)))
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})
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.collect()
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})
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.collect()
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.await;
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debug!("Resolving state");
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let state = self
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.state_resolution(room_version_id, &fork_states, &auth_chain_sets)
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.boxed()
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.await?;
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debug!("State resolution done.");
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let state_events: Vec<_> = state
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.iter()
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.stream()
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.wide_then(|((event_type, state_key), event_id)| {
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self.services
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.short
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.get_or_create_shortstatekey(event_type, state_key)
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.map(move |shortstatekey| (shortstatekey, event_id))
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})
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.collect()
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.await;
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debug!("Compressing state...");
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let new_room_state: HashSet<_> = self
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.services
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.state_compressor
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.compress_state_events(
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state_events
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.iter()
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.map(|(ref ssk, eid)| (ssk, (*eid).borrow())),
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)
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.collect()
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.await;
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Ok(Arc::new(new_room_state))
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}
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#[implement(super::Service)]
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#[tracing::instrument(name = "ruma", level = "debug", skip_all)]
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pub async fn state_resolution(
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&self,
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room_version: &RoomVersionId,
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state_sets: &[StateMap<Arc<EventId>>],
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auth_chain_sets: &Vec<HashSet<Arc<EventId>>>,
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) -> Result<StateMap<Arc<EventId>>> {
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//TODO: ???
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let _lock = self.services.globals.stateres_mutex.lock();
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state_res::resolve(
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room_version,
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state_sets.iter(),
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auth_chain_sets,
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&|event_id| self.event_fetch(event_id),
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&|event_id| self.event_exists(event_id),
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automatic_width(),
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)
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.await
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.map_err(|e| err!(error!("State resolution failed: {e:?}")))
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}
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