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Handle NewRoom and PossibleTagChange updates correctly

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For new rooms, we need to append to our list of known rooms. For tag changes, we need to be sure to update our cache when the tag can reasonably be assumed to have changed.

Fixes https://github.com/vector-im/riot-web/issues/14389
This commit is contained in:
Travis Ralston 2020-07-09 12:08:40 -06:00
parent 00fc34924c
commit f8e1996e2f
4 changed files with 28 additions and 24 deletions
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21
src/stores/room-list/algorithms/Algorithm.ts
View file

@ -677,18 +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) {
@ -701,6 +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) {
@ -715,6 +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
@ -722,6 +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

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;
}
}