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refactor: Preparation commit to split src/service/rooms/state.rs and src/api/server_server.rs

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Nyaaori/refactor-next
Nyaaori 2 years ago
parent 7d2b22f58d 9efd9f06c6 d0cbe46ff0 57c92f8044
commit 1b0477d569
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src/service/rooms/event_handler/mod.rs
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src/service/rooms/state/data.rs
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/// Builds a StateMap by iterating over all keys that start
/// with state_hash, this gives the full state for the given state_hash.
#[tracing::instrument(skip(self))]
pub async fn state_full_ids(&self, shortstatehash: u64) -> Result<BTreeMap<u64, Arc<EventId>>> {
let full_state = self
.load_shortstatehash_info(shortstatehash)?
.pop()
.expect("there is always one layer")
.1;
let mut result = BTreeMap::new();
let mut i = 0;
for compressed in full_state.into_iter() {
let parsed = self.parse_compressed_state_event(compressed)?;
result.insert(parsed.0, parsed.1);
i += 1;
if i % 100 == 0 {
tokio::task::yield_now().await;
}
}
Ok(result)
}
#[tracing::instrument(skip(self))]
pub async fn state_full(
&self,
shortstatehash: u64,
) -> Result<HashMap<(StateEventType, String), Arc<PduEvent>>> {
let full_state = self
.load_shortstatehash_info(shortstatehash)?
.pop()
.expect("there is always one layer")
.1;
let mut result = HashMap::new();
let mut i = 0;
for compressed in full_state {
let (_, eventid) = self.parse_compressed_state_event(compressed)?;
if let Some(pdu) = self.get_pdu(&eventid)? {
result.insert(
(
pdu.kind.to_string().into(),
pdu.state_key
.as_ref()
.ok_or_else(|| Error::bad_database("State event has no state key."))?
.clone(),
),
pdu,
);
}
i += 1;
if i % 100 == 0 {
tokio::task::yield_now().await;
}
}
Ok(result)
}
/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
#[tracing::instrument(skip(self))]
pub fn state_get_id(
&self,
shortstatehash: u64,
event_type: &StateEventType,
state_key: &str,
) -> Result<Option<Arc<EventId>>> {
let shortstatekey = match self.get_shortstatekey(event_type, state_key)? {
Some(s) => s,
None => return Ok(None),
};
let full_state = self
.load_shortstatehash_info(shortstatehash)?
.pop()
.expect("there is always one layer")
.1;
Ok(full_state
.into_iter()
.find(|bytes| bytes.starts_with(&shortstatekey.to_be_bytes()))
.and_then(|compressed| {
self.parse_compressed_state_event(compressed)
.ok()
.map(|(_, id)| id)
}))
}
/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
#[tracing::instrument(skip(self))]
pub fn state_get(
&self,
shortstatehash: u64,
event_type: &StateEventType,
state_key: &str,
) -> Result<Option<Arc<PduEvent>>> {
self.state_get_id(shortstatehash, event_type, state_key)?
.map_or(Ok(None), |event_id| self.get_pdu(&event_id))
}
/// Returns the state hash for this pdu.
pub fn pdu_shortstatehash(&self, event_id: &EventId) -> Result<Option<u64>> {
self.eventid_shorteventid
.get(event_id.as_bytes())?
.map_or(Ok(None), |shorteventid| {
self.shorteventid_shortstatehash
.get(&shorteventid)?
.map(|bytes| {
utils::u64_from_bytes(&bytes).map_err(|_| {
Error::bad_database(
"Invalid shortstatehash bytes in shorteventid_shortstatehash",
)
})
})
.transpose()
})
}
/// Returns the last state hash key added to the db for the given room.
#[tracing::instrument(skip(self))]
pub fn current_shortstatehash(&self, room_id: &RoomId) -> Result<Option<u64>> {
self.roomid_shortstatehash
.get(room_id.as_bytes())?
.map_or(Ok(None), |bytes| {
Ok(Some(utils::u64_from_bytes(&bytes).map_err(|_| {
Error::bad_database("Invalid shortstatehash in roomid_shortstatehash")
})?))
})
}
/// Force the creation of a new StateHash and insert it into the db.
///
/// Whatever `state` is supplied to `force_state` becomes the new current room state snapshot.
#[tracing::instrument(skip(self, new_state_ids_compressed, db))]
pub fn force_state(
&self,
room_id: &RoomId,
new_state_ids_compressed: HashSet<CompressedStateEvent>,
db: &Database,
) -> Result<()> {
let previous_shortstatehash = self.current_shortstatehash(room_id)?;
let state_hash = self.calculate_hash(
&new_state_ids_compressed
.iter()
.map(|bytes| &bytes[..])
.collect::<Vec<_>>(),
);
let (new_shortstatehash, already_existed) =
self.get_or_create_shortstatehash(&state_hash, &db.globals)?;
if Some(new_shortstatehash) == previous_shortstatehash {
return Ok(());
}
let states_parents = previous_shortstatehash
.map_or_else(|| Ok(Vec::new()), |p| self.load_shortstatehash_info(p))?;
let (statediffnew, statediffremoved) = if let Some(parent_stateinfo) = states_parents.last()
{
let statediffnew: HashSet<_> = new_state_ids_compressed
.difference(&parent_stateinfo.1)
.copied()
.collect();
let statediffremoved: HashSet<_> = parent_stateinfo
.1
.difference(&new_state_ids_compressed)
.copied()
.collect();
(statediffnew, statediffremoved)
} else {
(new_state_ids_compressed, HashSet::new())
};
if !already_existed {
self.save_state_from_diff(
new_shortstatehash,
statediffnew.clone(),
statediffremoved,
2, // every state change is 2 event changes on average
states_parents,
)?;
};
for event_id in statediffnew.into_iter().filter_map(|new| {
self.parse_compressed_state_event(new)
.ok()
.map(|(_, id)| id)
}) {
let pdu = match self.get_pdu_json(&event_id)? {
Some(pdu) => pdu,
None => continue,
};
if pdu.get("type").and_then(|val| val.as_str()) != Some("m.room.member") {
continue;
}
let pdu: PduEvent = match serde_json::from_str(
&serde_json::to_string(&pdu).expect("CanonicalJsonObj can be serialized to JSON"),
) {
Ok(pdu) => pdu,
Err(_) => continue,
};
#[derive(Deserialize)]
struct ExtractMembership {
membership: MembershipState,
}
let membership = match serde_json::from_str::<ExtractMembership>(pdu.content.get()) {
Ok(e) => e.membership,
Err(_) => continue,
};
let state_key = match pdu.state_key {
Some(k) => k,
None => continue,
};
let user_id = match UserId::parse(state_key) {
Ok(id) => id,
Err(_) => continue,
};
self.update_membership(room_id, &user_id, membership, &pdu.sender, None, db, false)?;
}
self.update_joined_count(room_id, db)?;
self.roomid_shortstatehash
.insert(room_id.as_bytes(), &new_shortstatehash.to_be_bytes())?;
Ok(())
}
/// Returns the full room state.
#[tracing::instrument(skip(self))]
pub async fn room_state_full(
&self,
room_id: &RoomId,
) -> Result<HashMap<(StateEventType, String), Arc<PduEvent>>> {
if let Some(current_shortstatehash) = self.current_shortstatehash(room_id)? {
self.state_full(current_shortstatehash).await
} else {
Ok(HashMap::new())
}
}
/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
#[tracing::instrument(skip(self))]
pub fn room_state_get_id(
&self,
room_id: &RoomId,
event_type: &StateEventType,
state_key: &str,
) -> Result<Option<Arc<EventId>>> {
if let Some(current_shortstatehash) = self.current_shortstatehash(room_id)? {
self.state_get_id(current_shortstatehash, event_type, state_key)
} else {
Ok(None)
}
}
/// Returns a single PDU from `room_id` with key (`event_type`, `state_key`).
#[tracing::instrument(skip(self))]
pub fn room_state_get(
&self,
room_id: &RoomId,
event_type: &StateEventType,
state_key: &str,
) -> Result<Option<Arc<PduEvent>>> {
if let Some(current_shortstatehash) = self.current_shortstatehash(room_id)? {
self.state_get(current_shortstatehash, event_type, state_key)
} else {
Ok(None)
}
}
/// Returns the leaf pdus of a room.
#[tracing::instrument(skip(self))]
pub fn get_pdu_leaves(&self, room_id: &RoomId) -> Result<HashSet<Arc<EventId>>> {
let mut prefix = room_id.as_bytes().to_vec();
prefix.push(0xff);
self.roomid_pduleaves
.scan_prefix(prefix)
.map(|(_, bytes)| {
EventId::parse_arc(utils::string_from_bytes(&bytes).map_err(|_| {
Error::bad_database("EventID in roomid_pduleaves is invalid unicode.")
})?)
.map_err(|_| Error::bad_database("EventId in roomid_pduleaves is invalid."))
})
.collect()
}
/// Replace the leaves of a room.
///
/// The provided `event_ids` become the new leaves, this allows a room to have multiple
/// `prev_events`.
#[tracing::instrument(skip(self))]
pub fn replace_pdu_leaves<'a>(
&self,
room_id: &RoomId,
event_ids: impl IntoIterator<Item = &'a EventId> + Debug,
) -> Result<()> {
let mut prefix = room_id.as_bytes().to_vec();
prefix.push(0xff);
for (key, _) in self.roomid_pduleaves.scan_prefix(prefix.clone()) {
self.roomid_pduleaves.remove(&key)?;
}
for event_id in event_ids {
let mut key = prefix.to_owned();
key.extend_from_slice(event_id.as_bytes());
self.roomid_pduleaves.insert(&key, event_id.as_bytes())?;
}
Ok(())
}
/// Generates a new StateHash and associates it with the incoming event.
///
/// This adds all current state events (not including the incoming event)
/// to `stateid_pduid` and adds the incoming event to `eventid_statehash`.
#[tracing::instrument(skip(self, state_ids_compressed, globals))]
pub fn set_event_state(
&self,
event_id: &EventId,
room_id: &RoomId,
state_ids_compressed: HashSet<CompressedStateEvent>,
globals: &super::globals::Globals,
) -> Result<()> {
let shorteventid = self.get_or_create_shorteventid(event_id, globals)?;
let previous_shortstatehash = self.current_shortstatehash(room_id)?;
let state_hash = self.calculate_hash(
&state_ids_compressed
.iter()
.map(|s| &s[..])
.collect::<Vec<_>>(),
);
let (shortstatehash, already_existed) =
self.get_or_create_shortstatehash(&state_hash, globals)?;
if !already_existed {
let states_parents = previous_shortstatehash
.map_or_else(|| Ok(Vec::new()), |p| self.load_shortstatehash_info(p))?;
let (statediffnew, statediffremoved) =
if let Some(parent_stateinfo) = states_parents.last() {
let statediffnew: HashSet<_> = state_ids_compressed
.difference(&parent_stateinfo.1)
.copied()
.collect();
let statediffremoved: HashSet<_> = parent_stateinfo
.1
.difference(&state_ids_compressed)
.copied()
.collect();
(statediffnew, statediffremoved)
} else {
(state_ids_compressed, HashSet::new())
};
self.save_state_from_diff(
shortstatehash,
statediffnew,
statediffremoved,
1_000_000, // high number because no state will be based on this one
states_parents,
)?;
}
self.shorteventid_shortstatehash
.insert(&shorteventid.to_be_bytes(), &shortstatehash.to_be_bytes())?;
Ok(())
}
/// Generates a new StateHash and associates it with the incoming event.
///
/// This adds all current state events (not including the incoming event)
/// to `stateid_pduid` and adds the incoming event to `eventid_statehash`.
#[tracing::instrument(skip(self, new_pdu, globals))]
pub fn append_to_state(
&self,
new_pdu: &PduEvent,
globals: &super::globals::Globals,
) -> Result<u64> {
let shorteventid = self.get_or_create_shorteventid(&new_pdu.event_id, globals)?;
let previous_shortstatehash = self.current_shortstatehash(&new_pdu.room_id)?;
if let Some(p) = previous_shortstatehash {
self.shorteventid_shortstatehash
.insert(&shorteventid.to_be_bytes(), &p.to_be_bytes())?;
}
if let Some(state_key) = &new_pdu.state_key {
let states_parents = previous_shortstatehash
.map_or_else(|| Ok(Vec::new()), |p| self.load_shortstatehash_info(p))?;
let shortstatekey = self.get_or_create_shortstatekey(
&new_pdu.kind.to_string().into(),
state_key,
globals,
)?;
let new = self.compress_state_event(shortstatekey, &new_pdu.event_id, globals)?;
let replaces = states_parents
.last()
.map(|info| {
info.1
.iter()
.find(|bytes| bytes.starts_with(&shortstatekey.to_be_bytes()))
})
.unwrap_or_default();
if Some(&new) == replaces {
return Ok(previous_shortstatehash.expect("must exist"));
}
// TODO: statehash with deterministic inputs
let shortstatehash = globals.next_count()?;
let mut statediffnew = HashSet::new();
statediffnew.insert(new);
let mut statediffremoved = HashSet::new();
if let Some(replaces) = replaces {
statediffremoved.insert(*replaces);
}
self.save_state_from_diff(
shortstatehash,
statediffnew,
statediffremoved,
2,
states_parents,
)?;
Ok(shortstatehash)
} else {
Ok(previous_shortstatehash.expect("first event in room must be a state event"))
}
}
#[tracing::instrument(skip(self, invite_event))]
pub fn calculate_invite_state(
&self,
invite_event: &PduEvent,
) -> Result<Vec<Raw<AnyStrippedStateEvent>>> {
let mut state = Vec::new();
// Add recommended events
if let Some(e) =
self.room_state_get(&invite_event.room_id, &StateEventType::RoomCreate, "")?
{
state.push(e.to_stripped_state_event());
}
if let Some(e) =
self.room_state_get(&invite_event.room_id, &StateEventType::RoomJoinRules, "")?
{
state.push(e.to_stripped_state_event());
}
if let Some(e) = self.room_state_get(
&invite_event.room_id,
&StateEventType::RoomCanonicalAlias,
"",
)? {
state.push(e.to_stripped_state_event());
}
if let Some(e) =
self.room_state_get(&invite_event.room_id, &StateEventType::RoomAvatar, "")?
{
state.push(e.to_stripped_state_event());
}
if let Some(e) =
self.room_state_get(&invite_event.room_id, &StateEventType::RoomName, "")?
{
state.push(e.to_stripped_state_event());
}
if let Some(e) = self.room_state_get(
&invite_event.room_id,
&StateEventType::RoomMember,
invite_event.sender.as_str(),
)? {
state.push(e.to_stripped_state_event());
}
state.push(invite_event.to_stripped_state_event());
Ok(state)
}
#[tracing::instrument(skip(self))]
pub fn set_room_state(&self, room_id: &RoomId, shortstatehash: u64) -> Result<()> {
self.roomid_shortstatehash
.insert(room_id.as_bytes(), &shortstatehash.to_be_bytes())?;
Ok(())
}

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