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Write all members of a sync in one go

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so state member events written but not causing a memberChange.hasJoined
don't prevent timeline member events for the same user from doing so
This commit is contained in:
Bruno Windels 2021-08-27 11:49:40 +02:00
parent d0c1ddb51b
commit 826de7e9cb
4 changed files with 332 additions and 162 deletions
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4
src/matrix/room/Room.js
View file

@ -30,6 +30,7 @@ const EVENT_ENCRYPTED_TYPE = "m.room.encrypted";
export class Room extends BaseRoom {
constructor(options) {
super(options);
// TODO: pass pendingEvents to start like pendingOperations?
const {pendingEvents} = options;
const relationWriter = new RelationWriter({
roomId: this.id,
@ -120,7 +121,8 @@ export class Room extends BaseRoom {
txn.roomMembers.removeAllForRoom(this.id);
}
const {entries: newEntries, updatedEntries, newLiveKey, memberChanges} =
await log.wrap("syncWriter", log => this._syncWriter.writeSync(roomResponse, isRejoin, txn, log), log.level.Detail);
await log.wrap("syncWriter", log => this._syncWriter.writeSync(
roomResponse, isRejoin, summaryChanges.hasFetchedMembers, txn, log), log.level.Detail);
if (decryptChanges) {
const decryption = await log.wrap("decryptChanges", log => decryptChanges.write(txn, log));
log.set("decryptionResults", decryption.results.size);

10
src/matrix/room/members/RoomMember.js
View file

@ -141,6 +141,16 @@ export class MemberChange {
return this.previousMembership === "join" && this.membership !== "join";
}
/** The result can be a false negative when all of these apply:
* - the complete set of room members hasn't been fetched yet.
* - the member event for this change was received in the
* state section and wasn't present in the timeline section.
* - the room response was limited, e.g. there was a gap.
*
* This is because during sync, in this case it is not possible
* to distinguish between a new member that joined the room
* during a gap and a lazy-loading member.
* */
get hasJoined() {
return this.previousMembership !== "join" && this.membership === "join";
}

361
src/matrix/room/timeline/persistence/MemberWriter.js
View file

@ -23,57 +23,27 @@ export class MemberWriter {
this._cache = new LRUCache(5, member => member.userId);
}
writeTimelineMemberEvent(event, txn) {
return this._writeMemberEvent(event, false, txn);
prepareMemberSync(stateEvents, timelineEvents, hasFetchedMembers) {
return new MemberSync(this, stateEvents, timelineEvents, hasFetchedMembers);
}
writeStateMemberEvent(event, isLimited, txn) {
// member events in the state section when the room response
// is not limited must always be lazy loaded members.
// If they are not, they will be repeated in the timeline anyway.
return this._writeMemberEvent(event, !isLimited, txn);
}
async _writeMemberEvent(event, isLazyLoadingMember, txn) {
const userId = event.state_key;
if (!userId) {
return;
}
const member = RoomMember.fromMemberEvent(this._roomId, event);
if (!member) {
return;
}
let existingMember = this._cache.get(userId);
async _writeMember(member, txn) {
let existingMember = this._cache.get(member.userId);
if (!existingMember) {
const memberData = await txn.roomMembers.get(this._roomId, userId);
const memberData = await txn.roomMembers.get(this._roomId, member.userId);
if (memberData) {
existingMember = new RoomMember(memberData);
}
}
// either never heard of the member, or something changed
if (!existingMember || !existingMember.equals(member)) {
txn.roomMembers.set(member.serialize());
this._cache.set(member);
// we also return a member change for lazy loading members if something changed,
// so when the dupe timeline event comes and it doesn't see a diff
// with the cache, we already returned the event here.
//
// it's just important that we don't consider the first LL event
// for a user we see as a membership change, or we'll share keys with
// them, etc...
if (isLazyLoadingMember && !existingMember) {
// we don't have a previous member, but we know this is not a
// membership change as it's a lazy loaded
// member so take the membership from the member
return new MemberChange(member, member.membership);
}
return new MemberChange(member, existingMember?.membership);
}
}
async lookupMember(userId, event, timelineEvents, txn) {
async lookupMember(userId, txn) {
let member = this._cache.get(userId);
if (!member) {
const memberData = await txn.roomMembers.get(this._roomId, userId);
@ -82,60 +52,170 @@ export class MemberWriter {
this._cache.set(member);
}
}
if (!member) {
// sometimes the member event isn't included in state, but rather in the timeline,
// even if it is not the first event in the timeline. In this case, go look for
// the last one before the event, or if none is found,
// the least recent matching member event in the timeline.
// The latter is needed because of new joins picking up their own display name
let foundEvent = false;
let memberEventBefore;
let firstMemberEvent;
for (let i = timelineEvents.length - 1; i >= 0; i -= 1) {
const e = timelineEvents[i];
let matchingEvent;
if (e.type === MEMBER_EVENT_TYPE && e.state_key === userId) {
matchingEvent = e;
firstMemberEvent = matchingEvent;
}
if (!foundEvent) {
if (e.event_id === event.event_id) {
foundEvent = true;
return member;
}
}
class MemberSync {
constructor(memberWriter, stateEvents, timelineEvents, hasFetchedMembers) {
this._memberWriter = memberWriter;
this._timelineEvents = timelineEvents;
this._hasFetchedMembers = hasFetchedMembers;
this._newStateMembers = stateEvents && this._stateEventsToMembers(stateEvents);
}
get _roomId() {
return this._memberWriter._roomId;
}
_stateEventsToMembers(stateEvents) {
let members;
for (const event of stateEvents) {
if (event.type === MEMBER_EVENT_TYPE) {
const member = RoomMember.fromMemberEvent(this._roomId, event);
if (member) {
if (!members) {
members = new Map();
}
} else if (matchingEvent) {
memberEventBefore = matchingEvent;
break;
members.set(member.userId, member);
}
}
}
return members;
}
_timelineEventsToMembers() {
let members;
// iterate backwards to only add the last member in the timeline
for (let i = this._timelineEvents.length - 1; i >= 0; i--) {
const e = this._timelineEvents[i];
const userId = e.state_key;
if (e.type === MEMBER_EVENT_TYPE && !members?.has(userId)) {
const member = RoomMember.fromMemberEvent(this._roomId, e);
if (member) {
if (!members) {
members = new Map();
}
members.set(member.userId, member);
}
}
}
return members;
}
async lookupMemberAtEvent(userId, event, txn) {
let member = this._findPrecedingMemberEventInTimeline(userId, event);
if (member) {
return member;
}
member = this._newStateMembers?.get(userId);
if (member) {
return member;
}
return await this._memberWriter.lookupMember(userId, txn);
}
async write(txn) {
const memberChanges = new Map();
const newTimelineMembers = this._timelineEventsToMembers();
if (this._newStateMembers) {
for (const member of this._newStateMembers.values()) {
if (!newTimelineMembers?.has(member.userId)) {
const memberChange = await this._memberWriter._writeMember(member, txn);
if (memberChange) {
// if the member event appeared only in the state section,
// AND we haven't heard about it AND we haven't fetched all members yet (to avoid #470),
// this may be a lazy loading member (if it's not in a gap, we are certain
// it is a ll member, in a gap, we can't tell), so we pass in our own membership as
// as the previous one so we won't consider it a join to not have false positives (to avoid #192).
// see also MemberChange.hasJoined
const maybeLazyLoadingMember = !this._hasFetchedMembers && !memberChange.previousMembership;
if (maybeLazyLoadingMember) {
memberChange.previousMembership = member.membership;
}
memberChanges.set(memberChange.userId, memberChange);
}
}
}
}
if (newTimelineMembers) {
for (const member of newTimelineMembers.values()) {
const memberChange = await this._memberWriter._writeMember(member, txn);
if (memberChange) {
memberChanges.set(memberChange.userId, memberChange);
}
}
}
return memberChanges;
}
// try to find the first member event before the given event,
// so we respect historical display names within the chunk of timeline
_findPrecedingMemberEventInTimeline(userId, event) {
let eventIndex = -1;
for (let i = this._timelineEvents.length - 1; i >= 0; i--) {
const e = this._timelineEvents[i];
if (e.event_id === event.event_id) {
eventIndex = i;
break;
}
}
for (let i = eventIndex - 1; i >= 0; i--) {
const e = this._timelineEvents[i];
if (e.type === MEMBER_EVENT_TYPE && e.state_key === userId) {
const member = RoomMember.fromMemberEvent(this._roomId, e);
if (member) {
return member;
}
}
// first see if we found a member event before the event we're looking up the sender for
if (memberEventBefore) {
member = RoomMember.fromMemberEvent(this._roomId, memberEventBefore);
}
// and only if we didn't, fall back to the first member event,
// regardless of where it is positioned relative to the lookup event
else if (firstMemberEvent) {
member = RoomMember.fromMemberEvent(this._roomId, firstMemberEvent);
}
}
return member;
}
}
export function tests() {
let idCounter = 0;
function createMemberEvent(membership, userId, displayName, avatarUrl) {
idCounter += 1;
return {
content: {
membership,
"displayname": displayName,
"avatar_url": avatarUrl
},
event_id: `$${idCounter}`,
sender: userId,
"state_key": userId,
type: "m.room.member"
};
}
function createRoomResponse(stateEvents, timelineEvents) {
if (!Array.isArray(timelineEvents)) {
timelineEvents = [timelineEvents];
}
if (!Array.isArray(stateEvents)) {
stateEvents = [stateEvents];
}
return {
timeline: {
limited: false,
events: timelineEvents,
},
state: {
events: stateEvents
}
};
}
function createTimelineResponse(timelineEvents) {
return createRoomResponse([], timelineEvents)
}
function createStateReponse(stateEvents) {
return createRoomResponse(stateEvents, []);
}
function createStorage(initialMembers = []) {
const members = new Map();
@ -163,81 +243,126 @@ export function tests() {
const alice = "@alice:hs.tld";
const avatar = "mxc://hs.tld/def";
/*
join without previous membership
join during gap with hasFetchedMembers=false
join during gap with hasFetchedMembers=true
join after invite
*/
return {
"new join through state": async assert => {
"new join": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage();
const change = await writer.writeStateMemberEvent(createMemberEvent("join", alice), true, txn);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("join", alice)], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(change.hasJoined);
assert.equal(txn.members.get(alice).membership, "join");
},
"accept invite through state": async assert => {
"accept invite": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("invite", alice)]);
const change = await writer.writeStateMemberEvent(createMemberEvent("join", alice), true, txn);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("join", alice)], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert.equal(change.previousMembership, "invite");
assert(change.hasJoined);
assert.equal(txn.members.get(alice).membership, "join");
},
"change display name through timeline": async assert => {
"change display name": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice")]);
const change = await writer.writeTimelineMemberEvent(createMemberEvent("join", alice, "Alies"), txn);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("join", alice, "Alies")], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(!change.hasJoined);
assert.equal(change.member.displayName, "Alies");
assert.equal(txn.members.get(alice).displayName, "Alies");
},
"set avatar through timeline": async assert => {
"set avatar": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice")]);
const change = await writer.writeTimelineMemberEvent(createMemberEvent("join", alice, "Alice", avatar), txn);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("join", alice, "Alice", avatar)], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(!change.hasJoined);
assert.equal(change.member.avatarUrl, avatar);
assert.equal(txn.members.get(alice).avatarUrl, avatar);
},
"ignore redundant member event": async assert => {
"ignore redundant member event in timeline": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice", avatar)]);
const change = await writer.writeTimelineMemberEvent(createMemberEvent("join", alice, "Alice", avatar), txn);
assert(!change);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("join", alice, "Alice", avatar)], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 0);
},
"ignore redundant member event in state": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice", avatar)]);
const memberSync = writer.prepareMemberSync([createMemberEvent("join", alice, "Alice", avatar)], [], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 0);
},
"leave": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice")]);
const change = await writer.writeTimelineMemberEvent(createMemberEvent("leave", alice, "Alice"), txn);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("leave", alice, "Alice")], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(change.hasLeft);
assert(!change.hasJoined);
},
"ban": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice")]);
const change = await writer.writeTimelineMemberEvent(createMemberEvent("ban", alice, "Alice"), txn);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("ban", alice, "Alice")], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(change.hasLeft);
assert(!change.hasJoined);
},
"reject invite": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("invite", alice, "Alice")]);
const change = await writer.writeTimelineMemberEvent(createMemberEvent("leave", alice, "Alice"), txn);
const memberSync = writer.prepareMemberSync([], [createMemberEvent("leave", alice, "Alice")], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(!change.hasLeft);
assert(!change.hasJoined);
},
"lazy loaded member we already know about doens't return change": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice")]);
const change = await writer.writeStateMemberEvent(createMemberEvent("join", alice, "Alice"), false, txn);
assert(!change);
const memberSync = writer.prepareMemberSync([createMemberEvent("join", alice, "Alice")], [], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 0);
},
"lazy loaded member we already know about changes display name": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage([member("join", alice, "Alice")]);
const change = await writer.writeStateMemberEvent(createMemberEvent("join", alice, "Alies"), false, txn);
const memberSync = writer.prepareMemberSync([createMemberEvent("join", alice, "Alies")], [], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(!change.hasJoined);
assert.equal(change.member.displayName, "Alies");
},
"unknown lazy loaded member returns change, but not considered a membership change": async assert => {
"unknown lazy loaded member returns change, but not considered a join": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage();
const change = await writer.writeStateMemberEvent(createMemberEvent("join", alice, "Alice"), false, txn);
const memberSync = writer.prepareMemberSync([createMemberEvent("join", alice, "Alice")], [], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(!change.hasJoined);
assert(!change.hasLeft);
assert.equal(change.member.membership, "join");
@ -247,30 +372,68 @@ export function tests() {
const writer = new MemberWriter(roomId);
const txn = createStorage();
const aliceJoin = createMemberEvent("join", alice, "Alice");
const change = await writer.writeStateMemberEvent(aliceJoin, false, txn);
assert(!change.hasJoined);
assert(!change.hasLeft);
const timelineChange = await writer.writeTimelineMemberEvent(aliceJoin, txn);
const memberSync = writer.prepareMemberSync([aliceJoin], [aliceJoin], false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(change.hasJoined);
assert(!change.hasLeft);
},
"newly joined member causes a change with lookup done first": async assert => {
const event = createMemberEvent("join", alice, "Alice");
"change display name in timeline with lazy loaded member in state": async assert => {
const writer = new MemberWriter(roomId);
const txn = createStorage();
const member = await writer.lookupMember(event.sender, event, [event], txn);
assert(member);
const change = await writer.writeTimelineMemberEvent(event, txn);
assert(change);
const memberSync = writer.prepareMemberSync(
[createMemberEvent("join", alice, "Alice")],
[createMemberEvent("join", alice, "Alies")],
false);
const changes = await memberSync.write(txn);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(change.hasJoined);
assert(!change.hasLeft);
assert.equal(change.member.displayName, "Alies");
},
"lookupMember returns closest member in the past": async assert => {
"lookupMemberAtEvent returns closest member in the past": async assert => {
const event1 = createMemberEvent("join", alice, "Alice");
const event2 = createMemberEvent("join", alice, "Alies");
const event3 = createMemberEvent("join", alice, "Alys");
const events = [event1, event2, event3];
// we write first because the MemberWriter assumes it is called before
// the SyncWriter does any lookups
const writer = new MemberWriter(roomId);
const txn = createStorage();
const member = await writer.lookupMember(event3.sender, event3, [event1, event2, event3], txn);
const memberSync = await writer.prepareMemberSync([], events, false);
let member = await memberSync.lookupMemberAtEvent(event1.sender, event1, txn);
assert.equal(member, undefined);
member = await memberSync.lookupMemberAtEvent(event2.sender, event2, txn);
assert.equal(member.displayName, "Alice");
member = await memberSync.lookupMemberAtEvent(event3.sender, event3, txn);
assert.equal(member.displayName, "Alies");
assert.equal(txn.members.size, 0);
const changes = await memberSync.write(txn);
assert.equal(txn.members.size, 1);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(change.hasJoined);
},
"lookupMemberAtEvent falls back on state event": async assert => {
const event1 = createMemberEvent("join", alice, "Alice");
const event2 = createMemberEvent("join", alice, "Alies");
// we write first because the MemberWriter assumes it is called before
// the SyncWriter does any lookups
const writer = new MemberWriter(roomId);
const txn = createStorage();
const memberSync = await writer.prepareMemberSync([event1], [event2], false);
const member = await memberSync.lookupMemberAtEvent(event2.sender, event2, txn);
assert.equal(member.displayName, "Alice");
assert.equal(txn.members.size, 0);
const changes = await memberSync.write(txn);
assert.equal(txn.members.size, 1);
assert.equal(changes.size, 1);
const change = changes.get(alice);
assert(change.hasJoined);
},
};
}

117
src/matrix/room/timeline/persistence/SyncWriter.js
View file

@ -133,66 +133,51 @@ export class SyncWriter {
return currentKey;
}
async _writeStateEvents(roomResponse, memberChanges, isLimited, txn, log) {
// persist state
const {state} = roomResponse;
if (Array.isArray(state?.events)) {
log.set("stateEvents", state.events.length);
for (const event of state.events) {
if (event.type === MEMBER_EVENT_TYPE) {
const memberChange = await this._memberWriter.writeStateMemberEvent(event, isLimited, txn);
if (memberChange) {
memberChanges.set(memberChange.userId, memberChange);
}
} else {
txn.roomState.set(this._roomId, event);
}
async _writeStateEvents(stateEvents, txn, log) {
let nonMemberStateEvents = 0;
for (const event of stateEvents) {
// member events are written prior by MemberWriter
if (event.type !== MEMBER_EVENT_TYPE) {
txn.roomState.set(this._roomId, event);
nonMemberStateEvents += 1;
}
}
log.set("stateEvents", nonMemberStateEvents);
}
async _writeTimeline(timeline, currentKey, memberChanges, txn, log) {
async _writeTimeline(timelineEvents, timeline, memberSync, currentKey, txn, log) {
const entries = [];
const updatedEntries = [];
if (Array.isArray(timeline?.events) && timeline.events.length) {
// only create a fragment when we will really write an event
currentKey = await this._ensureLiveFragment(currentKey, entries, timeline, txn, log);
const events = deduplicateEvents(timeline.events);
log.set("timelineEvents", events.length);
let timelineStateEventCount = 0;
for(const event of events) {
// store event in timeline
currentKey = currentKey.nextKey();
const storageEntry = createEventEntry(currentKey, this._roomId, event);
let member = await this._memberWriter.lookupMember(event.sender, event, events, txn);
if (member) {
storageEntry.displayName = member.displayName;
storageEntry.avatarUrl = member.avatarUrl;
}
txn.timelineEvents.insert(storageEntry);
const entry = new EventEntry(storageEntry, this._fragmentIdComparer);
entries.push(entry);
const updatedRelationTargetEntries = await this._relationWriter.writeRelation(entry, txn, log);
if (updatedRelationTargetEntries) {
updatedEntries.push(...updatedRelationTargetEntries);
}
// update state events after writing event, so for a member event,
// we only update the member info after having written the member event
// to the timeline, as we want that event to have the old profile info
if (typeof event.state_key === "string") {
timelineStateEventCount += 1;
if (event.type === MEMBER_EVENT_TYPE) {
const memberChange = await this._memberWriter.writeTimelineMemberEvent(event, txn);
if (memberChange) {
memberChanges.set(memberChange.userId, memberChange);
}
} else {
txn.roomState.set(this._roomId, event);
}
}
// only create a fragment when we will really write an event
currentKey = await this._ensureLiveFragment(currentKey, entries, timeline, txn, log);
log.set("timelineEvents", timelineEvents.length);
let timelineStateEventCount = 0;
for(const event of timelineEvents) {
// store event in timeline
currentKey = currentKey.nextKey();
const storageEntry = createEventEntry(currentKey, this._roomId, event);
let member = await memberSync.lookupMemberAtEvent(event.sender, event, txn);
if (member) {
storageEntry.displayName = member.displayName;
storageEntry.avatarUrl = member.avatarUrl;
}
txn.timelineEvents.insert(storageEntry);
const entry = new EventEntry(storageEntry, this._fragmentIdComparer);
entries.push(entry);
const updatedRelationTargetEntries = await this._relationWriter.writeRelation(entry, txn, log);
if (updatedRelationTargetEntries) {
updatedEntries.push(...updatedRelationTargetEntries);
}
// update state events after writing event, so for a member event,
// we only update the member info after having written the member event
// to the timeline, as we want that event to have the old profile info.
// member events are written prior by MemberWriter.
if (typeof event.state_key === "string" && event.type !== MEMBER_EVENT_TYPE) {
timelineStateEventCount += 1;
txn.roomState.set(this._roomId, event);
}
log.set("timelineStateEventCount", timelineStateEventCount);
}
log.set("timelineStateEventCount", timelineStateEventCount);
return {currentKey, entries, updatedEntries};
}
@ -224,14 +209,13 @@ export class SyncWriter {
* @type {SyncWriterResult}
* @property {Array<BaseEntry>} entries new timeline entries written
* @property {EventKey} newLiveKey the advanced key to write events at
* @property {Map<string, MemberChange>} memberChanges member changes in the processed sync ny user id
*
* @param {Object} roomResponse [description]
* @param {boolean} isRejoin whether the room was rejoined in the sync being processed
* @param {Transaction} txn
* @return {SyncWriterResult}
*/
async writeSync(roomResponse, isRejoin, txn, log) {
async writeSync(roomResponse, isRejoin, hasFetchedMembers, txn, log) {
let {timeline} = roomResponse;
// we have rejoined the room after having synced it before,
// check for overlap with the last synced event
@ -239,13 +223,24 @@ export class SyncWriter {
if (isRejoin) {
timeline = await this._handleRejoinOverlap(timeline, txn, log);
}
const memberChanges = new Map();
// important this happens before _writeTimeline so
// members are available in the transaction
await this._writeStateEvents(roomResponse, memberChanges, timeline?.limited, txn, log);
const {currentKey, entries, updatedEntries} =
await this._writeTimeline(timeline, this._lastLiveKey, memberChanges, txn, log);
log.set("memberChanges", memberChanges.size);
let timelineEvents;
if (Array.isArray(timeline?.events)) {
timelineEvents = deduplicateEvents(timeline.events);
}
const {state} = roomResponse;
let stateEvents;
if (Array.isArray(state?.events)) {
stateEvents = state.events;
}
const memberSync = this._memberWriter.prepareMemberSync(stateEvents, timelineEvents, hasFetchedMembers);
if (stateEvents) {
await this._writeStateEvents(roomResponse, txn, log);
}
if (timelineEvents?.length) {
const {currentKey, entries, updatedEntries} =
await this._writeTimeline(timelineEvents, timeline, memberSync, this._lastLiveKey, txn, log);
}
const memberChanges = await memberSync.write(txn);
return {entries, updatedEntries, newLiveKey: currentKey, memberChanges};
}