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@ -1,120 +1,6 @@
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/// Builds a StateMap by iterating over all keys that start
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/// with state_hash, this gives the full state for the given state_hash.
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#[tracing::instrument(skip(self))]
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pub async fn state_full_ids(&self, shortstatehash: u64) -> Result<BTreeMap<u64, Arc<EventId>>> {
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let full_state = self
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.load_shortstatehash_info(shortstatehash)?
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.pop()
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.expect("there is always one layer")
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.1;
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let mut result = BTreeMap::new();
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let mut i = 0;
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for compressed in full_state.into_iter() {
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let parsed = self.parse_compressed_state_event(compressed)?;
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result.insert(parsed.0, parsed.1);
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i += 1;
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if i % 100 == 0 {
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tokio::task::yield_now().await;
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}
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}
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Ok(result)
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}
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#[tracing::instrument(skip(self))]
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pub async fn state_full(
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&self,
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shortstatehash: u64,
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) -> Result<HashMap<(StateEventType, String), Arc<PduEvent>>> {
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let full_state = self
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.load_shortstatehash_info(shortstatehash)?
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.pop()
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.expect("there is always one layer")
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.1;
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let mut result = HashMap::new();
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let mut i = 0;
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for compressed in full_state {
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let (_, eventid) = self.parse_compressed_state_event(compressed)?;
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if let Some(pdu) = self.get_pdu(&eventid)? {
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result.insert(
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(
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pdu.kind.to_string().into(),
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pdu.state_key
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.as_ref()
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.ok_or_else(|| Error::bad_database("State event has no state key."))?
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.clone(),
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),
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pdu,
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);
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}
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i += 1;
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if i % 100 == 0 {
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tokio::task::yield_now().await;
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}
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}
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Ok(result)
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}
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/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
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#[tracing::instrument(skip(self))]
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pub fn state_get_id(
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&self,
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shortstatehash: u64,
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event_type: &StateEventType,
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state_key: &str,
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) -> Result<Option<Arc<EventId>>> {
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let shortstatekey = match self.get_shortstatekey(event_type, state_key)? {
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Some(s) => s,
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None => return Ok(None),
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};
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let full_state = self
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.load_shortstatehash_info(shortstatehash)?
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.pop()
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.expect("there is always one layer")
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.1;
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Ok(full_state
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.into_iter()
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.find(|bytes| bytes.starts_with(&shortstatekey.to_be_bytes()))
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.and_then(|compressed| {
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self.parse_compressed_state_event(compressed)
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.ok()
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.map(|(_, id)| id)
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}))
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}
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/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
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#[tracing::instrument(skip(self))]
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pub fn state_get(
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&self,
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shortstatehash: u64,
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event_type: &StateEventType,
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state_key: &str,
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) -> Result<Option<Arc<PduEvent>>> {
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self.state_get_id(shortstatehash, event_type, state_key)?
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.map_or(Ok(None), |event_id| self.get_pdu(&event_id))
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}
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/// Returns the state hash for this pdu.
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pub fn pdu_shortstatehash(&self, event_id: &EventId) -> Result<Option<u64>> {
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self.eventid_shorteventid
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.get(event_id.as_bytes())?
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.map_or(Ok(None), |shorteventid| {
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self.shorteventid_shortstatehash
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.get(&shorteventid)?
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.map(|bytes| {
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utils::u64_from_bytes(&bytes).map_err(|_| {
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Error::bad_database(
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"Invalid shortstatehash bytes in shorteventid_shortstatehash",
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)
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})
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})
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.transpose()
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})
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}
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pub trait Data {
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fn get_room_shortstatehash(room_id: &RoomId);
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}
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/// Returns the last state hash key added to the db for the given room.
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#[tracing::instrument(skip(self))]
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@ -128,382 +14,3 @@
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})
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}
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/// Force the creation of a new StateHash and insert it into the db.
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///
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/// Whatever `state` is supplied to `force_state` becomes the new current room state snapshot.
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#[tracing::instrument(skip(self, new_state_ids_compressed, db))]
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pub fn force_state(
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&self,
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room_id: &RoomId,
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new_state_ids_compressed: HashSet<CompressedStateEvent>,
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db: &Database,
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) -> Result<()> {
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let previous_shortstatehash = self.current_shortstatehash(room_id)?;
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let state_hash = self.calculate_hash(
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&new_state_ids_compressed
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.iter()
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.map(|bytes| &bytes[..])
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.collect::<Vec<_>>(),
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);
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let (new_shortstatehash, already_existed) =
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self.get_or_create_shortstatehash(&state_hash, &db.globals)?;
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if Some(new_shortstatehash) == previous_shortstatehash {
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return Ok(());
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}
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let states_parents = previous_shortstatehash
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.map_or_else(|| Ok(Vec::new()), |p| self.load_shortstatehash_info(p))?;
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let (statediffnew, statediffremoved) = if let Some(parent_stateinfo) = states_parents.last()
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{
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let statediffnew: HashSet<_> = new_state_ids_compressed
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.difference(&parent_stateinfo.1)
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.copied()
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.collect();
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let statediffremoved: HashSet<_> = parent_stateinfo
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.1
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.difference(&new_state_ids_compressed)
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.copied()
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.collect();
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(statediffnew, statediffremoved)
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} else {
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(new_state_ids_compressed, HashSet::new())
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};
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if !already_existed {
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self.save_state_from_diff(
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new_shortstatehash,
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statediffnew.clone(),
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statediffremoved,
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2, // every state change is 2 event changes on average
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states_parents,
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)?;
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};
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for event_id in statediffnew.into_iter().filter_map(|new| {
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self.parse_compressed_state_event(new)
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.ok()
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.map(|(_, id)| id)
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}) {
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let pdu = match self.get_pdu_json(&event_id)? {
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Some(pdu) => pdu,
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None => continue,
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};
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if pdu.get("type").and_then(|val| val.as_str()) != Some("m.room.member") {
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continue;
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}
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let pdu: PduEvent = match serde_json::from_str(
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&serde_json::to_string(&pdu).expect("CanonicalJsonObj can be serialized to JSON"),
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) {
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Ok(pdu) => pdu,
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Err(_) => continue,
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};
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#[derive(Deserialize)]
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struct ExtractMembership {
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membership: MembershipState,
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}
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let membership = match serde_json::from_str::<ExtractMembership>(pdu.content.get()) {
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Ok(e) => e.membership,
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Err(_) => continue,
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};
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let state_key = match pdu.state_key {
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Some(k) => k,
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None => continue,
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};
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let user_id = match UserId::parse(state_key) {
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Ok(id) => id,
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Err(_) => continue,
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};
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self.update_membership(room_id, &user_id, membership, &pdu.sender, None, db, false)?;
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}
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self.update_joined_count(room_id, db)?;
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self.roomid_shortstatehash
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.insert(room_id.as_bytes(), &new_shortstatehash.to_be_bytes())?;
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Ok(())
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}
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/// Returns the full room state.
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#[tracing::instrument(skip(self))]
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pub async fn room_state_full(
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&self,
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room_id: &RoomId,
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) -> Result<HashMap<(StateEventType, String), Arc<PduEvent>>> {
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if let Some(current_shortstatehash) = self.current_shortstatehash(room_id)? {
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self.state_full(current_shortstatehash).await
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} else {
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Ok(HashMap::new())
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}
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}
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/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
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#[tracing::instrument(skip(self))]
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pub fn room_state_get_id(
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&self,
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room_id: &RoomId,
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event_type: &StateEventType,
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state_key: &str,
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) -> Result<Option<Arc<EventId>>> {
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if let Some(current_shortstatehash) = self.current_shortstatehash(room_id)? {
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self.state_get_id(current_shortstatehash, event_type, state_key)
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} else {
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Ok(None)
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}
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}
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/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
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#[tracing::instrument(skip(self))]
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pub fn room_state_get(
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&self,
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room_id: &RoomId,
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event_type: &StateEventType,
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state_key: &str,
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) -> Result<Option<Arc<PduEvent>>> {
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if let Some(current_shortstatehash) = self.current_shortstatehash(room_id)? {
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self.state_get(current_shortstatehash, event_type, state_key)
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} else {
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Ok(None)
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}
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}
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/// Returns the leaf pdus of a room.
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#[tracing::instrument(skip(self))]
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pub fn get_pdu_leaves(&self, room_id: &RoomId) -> Result<HashSet<Arc<EventId>>> {
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let mut prefix = room_id.as_bytes().to_vec();
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prefix.push(0xff);
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self.roomid_pduleaves
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.scan_prefix(prefix)
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.map(|(_, bytes)| {
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EventId::parse_arc(utils::string_from_bytes(&bytes).map_err(|_| {
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Error::bad_database("EventID in roomid_pduleaves is invalid unicode.")
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})?)
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.map_err(|_| Error::bad_database("EventId in roomid_pduleaves is invalid."))
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})
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.collect()
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}
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/// Replace the leaves of a room.
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///
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/// The provided `event_ids` become the new leaves, this allows a room to have multiple
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/// `prev_events`.
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#[tracing::instrument(skip(self))]
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pub fn replace_pdu_leaves<'a>(
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&self,
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room_id: &RoomId,
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event_ids: impl IntoIterator<Item = &'a EventId> + Debug,
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) -> Result<()> {
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let mut prefix = room_id.as_bytes().to_vec();
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prefix.push(0xff);
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for (key, _) in self.roomid_pduleaves.scan_prefix(prefix.clone()) {
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self.roomid_pduleaves.remove(&key)?;
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}
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for event_id in event_ids {
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let mut key = prefix.to_owned();
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key.extend_from_slice(event_id.as_bytes());
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self.roomid_pduleaves.insert(&key, event_id.as_bytes())?;
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}
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Ok(())
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}
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/// Generates a new StateHash and associates it with the incoming event.
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///
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/// This adds all current state events (not including the incoming event)
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/// to `stateid_pduid` and adds the incoming event to `eventid_statehash`.
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#[tracing::instrument(skip(self, state_ids_compressed, globals))]
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pub fn set_event_state(
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&self,
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event_id: &EventId,
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room_id: &RoomId,
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state_ids_compressed: HashSet<CompressedStateEvent>,
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globals: &super::globals::Globals,
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) -> Result<()> {
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let shorteventid = self.get_or_create_shorteventid(event_id, globals)?;
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let previous_shortstatehash = self.current_shortstatehash(room_id)?;
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let state_hash = self.calculate_hash(
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&state_ids_compressed
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.iter()
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.map(|s| &s[..])
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.collect::<Vec<_>>(),
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);
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let (shortstatehash, already_existed) =
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self.get_or_create_shortstatehash(&state_hash, globals)?;
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if !already_existed {
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let states_parents = previous_shortstatehash
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.map_or_else(|| Ok(Vec::new()), |p| self.load_shortstatehash_info(p))?;
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let (statediffnew, statediffremoved) =
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if let Some(parent_stateinfo) = states_parents.last() {
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let statediffnew: HashSet<_> = state_ids_compressed
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.difference(&parent_stateinfo.1)
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.copied()
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.collect();
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let statediffremoved: HashSet<_> = parent_stateinfo
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.1
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.difference(&state_ids_compressed)
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.copied()
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.collect();
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(statediffnew, statediffremoved)
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} else {
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(state_ids_compressed, HashSet::new())
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};
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self.save_state_from_diff(
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shortstatehash,
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statediffnew,
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statediffremoved,
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1_000_000, // high number because no state will be based on this one
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states_parents,
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)?;
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}
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self.shorteventid_shortstatehash
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.insert(&shorteventid.to_be_bytes(), &shortstatehash.to_be_bytes())?;
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Ok(())
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}
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/// Generates a new StateHash and associates it with the incoming event.
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///
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/// This adds all current state events (not including the incoming event)
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/// to `stateid_pduid` and adds the incoming event to `eventid_statehash`.
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#[tracing::instrument(skip(self, new_pdu, globals))]
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pub fn append_to_state(
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&self,
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new_pdu: &PduEvent,
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globals: &super::globals::Globals,
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) -> Result<u64> {
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let shorteventid = self.get_or_create_shorteventid(&new_pdu.event_id, globals)?;
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let previous_shortstatehash = self.current_shortstatehash(&new_pdu.room_id)?;
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if let Some(p) = previous_shortstatehash {
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self.shorteventid_shortstatehash
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.insert(&shorteventid.to_be_bytes(), &p.to_be_bytes())?;
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}
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if let Some(state_key) = &new_pdu.state_key {
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let states_parents = previous_shortstatehash
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.map_or_else(|| Ok(Vec::new()), |p| self.load_shortstatehash_info(p))?;
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let shortstatekey = self.get_or_create_shortstatekey(
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&new_pdu.kind.to_string().into(),
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state_key,
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globals,
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)?;
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let new = self.compress_state_event(shortstatekey, &new_pdu.event_id, globals)?;
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let replaces = states_parents
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.last()
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.map(|info| {
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info.1
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.iter()
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.find(|bytes| bytes.starts_with(&shortstatekey.to_be_bytes()))
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})
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.unwrap_or_default();
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if Some(&new) == replaces {
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return Ok(previous_shortstatehash.expect("must exist"));
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}
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// TODO: statehash with deterministic inputs
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let shortstatehash = globals.next_count()?;
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let mut statediffnew = HashSet::new();
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statediffnew.insert(new);
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let mut statediffremoved = HashSet::new();
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if let Some(replaces) = replaces {
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statediffremoved.insert(*replaces);
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}
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self.save_state_from_diff(
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shortstatehash,
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statediffnew,
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statediffremoved,
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2,
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states_parents,
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)?;
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Ok(shortstatehash)
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} else {
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Ok(previous_shortstatehash.expect("first event in room must be a state event"))
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}
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}
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#[tracing::instrument(skip(self, invite_event))]
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pub fn calculate_invite_state(
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&self,
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invite_event: &PduEvent,
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) -> Result<Vec<Raw<AnyStrippedStateEvent>>> {
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let mut state = Vec::new();
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// Add recommended events
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if let Some(e) =
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self.room_state_get(&invite_event.room_id, &StateEventType::RoomCreate, "")?
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{
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state.push(e.to_stripped_state_event());
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}
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if let Some(e) =
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self.room_state_get(&invite_event.room_id, &StateEventType::RoomJoinRules, "")?
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{
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state.push(e.to_stripped_state_event());
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}
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if let Some(e) = self.room_state_get(
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&invite_event.room_id,
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&StateEventType::RoomCanonicalAlias,
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"",
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)? {
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state.push(e.to_stripped_state_event());
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}
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if let Some(e) =
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self.room_state_get(&invite_event.room_id, &StateEventType::RoomAvatar, "")?
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{
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state.push(e.to_stripped_state_event());
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}
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if let Some(e) =
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self.room_state_get(&invite_event.room_id, &StateEventType::RoomName, "")?
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{
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state.push(e.to_stripped_state_event());
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}
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if let Some(e) = self.room_state_get(
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&invite_event.room_id,
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&StateEventType::RoomMember,
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invite_event.sender.as_str(),
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)? {
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state.push(e.to_stripped_state_event());
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}
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state.push(invite_event.to_stripped_state_event());
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Ok(state)
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}
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#[tracing::instrument(skip(self))]
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pub fn set_room_state(&self, room_id: &RoomId, shortstatehash: u64) -> Result<()> {
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self.roomid_shortstatehash
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.insert(room_id.as_bytes(), &shortstatehash.to_be_bytes())?;
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Ok(())
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}
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Timo Kösters
2 years ago
committed by
Nyaaori