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Merge pull request #4940 from matrix-org/travis/room-list/sticky-rooms

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Improve safety of new rooms in the room list
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Travis Ralston 2020-07-09 12:25:47 -06:00 committed by GitHub
commit 8ca15d8185
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4 changed files with 44 additions and 24 deletions
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37
src/stores/room-list/algorithms/Algorithm.ts
View file

@ -41,6 +41,17 @@ import { getListAlgorithmInstance } from "./list-ordering";
*/
export const LIST_UPDATED_EVENT = "list_updated_event";
// These are the causes which require a room to be known in order for us to handle them. If
// a cause in this list is raised and we don't know about the room, we don't handle the update.
//
// Note: these typically happen when a new room is coming in, such as the user creating or
// joining the room. For these cases, we need to know about the room prior to handling it otherwise
// we'll make bad assumptions.
const CAUSES_REQUIRING_ROOM = [
RoomUpdateCause.Timeline,
RoomUpdateCause.ReadReceipt,
];
interface IStickyRoom {
room: Room;
position: number;
@ -666,18 +677,6 @@ export class Algorithm extends EventEmitter {
}
}
if (hasTags && isForLastSticky && !knownRoomRef) {
// we have a fairly good chance at losing a room right now. Under some circumstances,
// we can end up with a room which transitions references and tag changes, then gets
// lost when the sticky room changes. To counter this, we try and add the room to the
// list manually as the condition below to update the reference will fail.
//
// Other conditions *should* result in the room being sorted into the right place.
console.warn(`${room.roomId} was about to be lost - inserting at end of room list`);
this.rooms.push(room);
knownRoomRef = true;
}
// If we have tags for a room and don't have the room referenced, something went horribly
// wrong - the reference should have been updated above.
if (hasTags && !knownRoomRef && !isSticky) {
@ -690,6 +689,13 @@ export class Algorithm extends EventEmitter {
// to trigger a sticky room update ourselves.
this._stickyRoom.room = room;
}
// If after all that we're still a NewRoom update, add the room if applicable.
// We don't do this for the sticky room (because it causes duplication issues)
// or if we know about the reference (as it should be replaced).
if (cause === RoomUpdateCause.NewRoom && !isSticky && !knownRoomRef) {
this.rooms.push(room);
}
}
if (cause === RoomUpdateCause.PossibleTagChange) {
@ -704,6 +710,7 @@ export class Algorithm extends EventEmitter {
const algorithm: OrderingAlgorithm = this.algorithms[rmTag];
if (!algorithm) throw new Error(`No algorithm for ${rmTag}`);
await algorithm.handleRoomUpdate(room, RoomUpdateCause.RoomRemoved);
this.cachedRooms[rmTag] = algorithm.orderedRooms;
}
for (const addTag of diff.added) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
@ -711,6 +718,7 @@ export class Algorithm extends EventEmitter {
const algorithm: OrderingAlgorithm = this.algorithms[addTag];
if (!algorithm) throw new Error(`No algorithm for ${addTag}`);
await algorithm.handleRoomUpdate(room, RoomUpdateCause.NewRoom);
this.cachedRooms[addTag] = algorithm.orderedRooms;
}
// Update the tag map so we don't regen it in a moment
@ -755,6 +763,11 @@ export class Algorithm extends EventEmitter {
}
if (!this.roomIdsToTags[room.roomId]) {
if (CAUSES_REQUIRING_ROOM.includes(cause)) {
console.warn(`Skipping tag update for ${room.roomId} because we don't know about the room`);
return false;
}
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Updating tags for room ${room.roomId} (${room.name})`);

14
src/stores/room-list/algorithms/list-ordering/ImportanceAlgorithm.ts
View file

@ -160,7 +160,10 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
this.cachedOrderedRooms.splice(this.indices[category], 0, room); // splice in the new room (pre-adjusted)
} else if (cause === RoomUpdateCause.RoomRemoved) {
const roomIdx = this.getRoomIndex(room);
if (roomIdx === -1) return false; // no change
if (roomIdx === -1) {
console.warn(`Tried to remove unknown room from ${this.tagId}: ${room.roomId}`);
return false; // no change
}
const oldCategory = this.getCategoryFromIndices(roomIdx, this.indices);
this.alterCategoryPositionBy(oldCategory, -1, this.indices);
this.cachedOrderedRooms.splice(roomIdx, 1); // remove the room
@ -169,15 +172,6 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
}
}
private getRoomIndex(room: Room): number {
let roomIdx = this.cachedOrderedRooms.indexOf(room);
if (roomIdx === -1) { // can only happen if the js-sdk's store goes sideways.
console.warn(`Degrading performance to find missing room in "${this.tagId}": ${room.roomId}`);
roomIdx = this.cachedOrderedRooms.findIndex(r => r.roomId === room.roomId);
}
return roomIdx;
}
public async handleRoomUpdate(room: Room, cause: RoomUpdateCause): Promise<boolean> {
try {
await this.updateLock.acquireAsync();

8
src/stores/room-list/algorithms/list-ordering/NaturalAlgorithm.ts
View file

@ -50,8 +50,12 @@ export class NaturalAlgorithm extends OrderingAlgorithm {
if (cause === RoomUpdateCause.NewRoom) {
this.cachedOrderedRooms.push(room);
} else if (cause === RoomUpdateCause.RoomRemoved) {
const idx = this.cachedOrderedRooms.indexOf(room);
if (idx >= 0) this.cachedOrderedRooms.splice(idx, 1);
const idx = this.getRoomIndex(room);
if (idx >= 0) {
this.cachedOrderedRooms.splice(idx, 1);
} else {
console.warn(`Tried to remove unknown room from ${this.tagId}: ${room.roomId}`);
}
}
// TODO: Optimize this to avoid useless operations: https://github.com/vector-im/riot-web/issues/14035

9
src/stores/room-list/algorithms/list-ordering/OrderingAlgorithm.ts
View file

@ -70,4 +70,13 @@ export abstract class OrderingAlgorithm {
* @returns True if the update requires the Algorithm to update the presentation layers.
*/
public abstract handleRoomUpdate(room: Room, cause: RoomUpdateCause): Promise<boolean>;
protected getRoomIndex(room: Room): number {
let roomIdx = this.cachedOrderedRooms.indexOf(room);
if (roomIdx === -1) { // can only happen if the js-sdk's store goes sideways.
console.warn(`Degrading performance to find missing room in "${this.tagId}": ${room.roomId}`);
roomIdx = this.cachedOrderedRooms.findIndex(r => r.roomId === room.roomId);
}
return roomIdx;
}
}