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write needsRoomKey flag when new members joins to tracked e2ee room

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This commit is contained in:
Bruno Windels 2020-09-08 14:22:11 +02:00
parent d184be2d22
commit bbaf3a5605
3 changed files with 60 additions and 27 deletions
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2
src/matrix/room/Room.js
View file

@ -127,7 +127,7 @@ export class Room extends EventEmitter {
isInitialSync, isTimelineOpen,
txn);
const {entries: encryptedEntries, newLiveKey, memberChanges} =
await this._syncWriter.writeSync(roomResponse, txn);
await this._syncWriter.writeSync(roomResponse, this.isTrackingMembers, txn);
// decrypt if applicable
let entries = encryptedEntries;
if (this._roomEncryption) {

12
src/matrix/room/members/RoomMember.js
View file

@ -67,6 +67,14 @@ export class RoomMember {
});
}
get needsRoomKey() {
return this._data.needsRoomKey;
}
set needsRoomKey(value) {
this._data.needsRoomKey = !!value;
}
get membership() {
return this._data.membership;
}
@ -138,4 +146,8 @@ export class MemberChange {
get hasLeft() {
return this.previousMembership === "join" && this.membership !== "join";
}
get hasJoined() {
return this.previousMembership !== "join" && this.membership === "join";
}
}

73
src/matrix/room/timeline/persistence/SyncWriter.js
View file

@ -98,39 +98,47 @@ export class SyncWriter {
return {oldFragment, newFragment};
}
_writeStateEvent(event, txn) {
if (event.type === MEMBER_EVENT_TYPE) {
const userId = event.state_key;
if (userId) {
const memberChange = new MemberChange(this._roomId, event);
if (memberChange.member) {
// as this is sync, we can just replace the member
// if it is there already
txn.roomMembers.set(memberChange.member.serialize());
return memberChange;
async _writeMember(event, trackNewlyJoined, txn) {
const userId = event.state_key;
if (userId) {
const memberChange = new MemberChange(this._roomId, event);
const {member} = memberChange;
if (member) {
if (trackNewlyJoined) {
const existingMemberData = await txn.roomMembers.get(this._roomId, userId);
// mark new members so we know who needs our the room key for our outbound megolm session
member.needsRoomKey = existingMemberData.needsRoomKey || memberChange.hasJoined;
}
txn.roomMembers.set(member.serialize());
return memberChange;
}
}
}
async _writeStateEvent(event, trackNewlyJoined, txn) {
if (event.type === MEMBER_EVENT_TYPE) {
return await this._writeMember(event, trackNewlyJoined, txn);
} else {
txn.roomState.set(this._roomId, event);
}
}
_writeStateEvents(roomResponse, txn) {
async _writeStateEvents(roomResponse, trackNewlyJoined, txn) {
const memberChanges = new Map();
// persist state
const {state} = roomResponse;
if (Array.isArray(state?.events)) {
for (const event of state.events) {
const memberChange = this._writeStateEvent(event, txn);
await Promise.all(state.events.map(async event => {
const memberChange = await this._writeStateEvent(event, trackNewlyJoined, txn);
if (memberChange) {
memberChanges.set(memberChange.userId, memberChange);
}
}
}));
}
return memberChanges;
}
async _writeTimeline(entries, timeline, currentKey, txn) {
async _writeTimeline(entries, timeline, currentKey, trackNewlyJoined, txn) {
const memberChanges = new Map();
if (timeline.events) {
const events = deduplicateEvents(timeline.events);
@ -145,15 +153,17 @@ export class SyncWriter {
}
txn.timelineEvents.insert(entry);
entries.push(new EventEntry(entry, this._fragmentIdComparer));
// process live state events first, so new member info is available
if (typeof event.state_key === "string") {
const memberChange = this._writeStateEvent(event, txn);
if (memberChange) {
memberChanges.set(memberChange.userId, memberChange);
}
}
}
// process live state events first, so new member info is available
// also run async state event writing in parallel
await Promise.all(events.filter(event => {
return typeof event.state_key === "string";
}).map(async stateEvent => {
const memberChange = await this._writeStateEvent(stateEvent, trackNewlyJoined, txn);
if (memberChange) {
memberChanges.set(memberChange.userId, memberChange);
}
}));
}
return {currentKey, memberChanges};
}
@ -176,7 +186,18 @@ export class SyncWriter {
}
}
async writeSync(roomResponse, txn) {
/**
* @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} trackNewlyJoined needed to know if we need to keep track whether a user needs keys when they join an encrypted room
* @param {Transaction} txn
* @return {SyncWriterResult}
*/
async writeSync(roomResponse, trackNewlyJoined, txn) {
const entries = [];
const {timeline} = roomResponse;
let currentKey = this._lastLiveKey;
@ -198,8 +219,8 @@ export class SyncWriter {
}
// important this happens before _writeTimeline so
// members are available in the transaction
const memberChanges = this._writeStateEvents(roomResponse, txn);
const timelineResult = await this._writeTimeline(entries, timeline, currentKey, txn);
const memberChanges = this._writeStateEvents(roomResponse, trackNewlyJoined, txn);
const timelineResult = await this._writeTimeline(entries, timeline, currentKey, trackNewlyJoined, txn);
currentKey = timelineResult.currentKey;
// merge member changes from state and timeline, giving precedence to the latter
for (const [userId, memberChange] of timelineResult.memberChanges.entries()) {