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Ensure we don't overinflate the total notification count (#3634)
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* Ensure we don't overinflate the total notification count

By correctly comparing push rules before & after decryption

* DRY the code

* Testsssss

* Update tests
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@t3chguy
t3chguy committed Jul 28, 2023
1 parent 615f7f9 commit fd0c4a7
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Showing 6 changed files with 81 additions and 58 deletions.
18 changes: 14 additions & 4 deletions spec/unit/event-timeline-set.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -303,8 +303,13 @@ describe("EventTimelineSet", () => {
messageEventIsDecryptionFailureSpy.mockReturnValue(true);
replyEventIsDecryptionFailureSpy.mockReturnValue(true);

messageEvent.emit(MatrixEventEvent.Decrypted, messageEvent);
replyEvent.emit(MatrixEventEvent.Decrypted, replyEvent);
messageEvent.emit(
MatrixEventEvent.Decrypted,
messageEvent,
undefined,
messageEvent.getPushDetails(),
);
replyEvent.emit(MatrixEventEvent.Decrypted, replyEvent, undefined, replyEvent.getPushDetails());

// simulate decryption
messageEventIsDecryptionFailureSpy.mockReturnValue(false);
Expand All @@ -313,8 +318,13 @@ describe("EventTimelineSet", () => {
messageEventShouldAttemptDecryptionSpy.mockReturnValue(false);
replyEventShouldAttemptDecryptionSpy.mockReturnValue(false);

messageEvent.emit(MatrixEventEvent.Decrypted, messageEvent);
replyEvent.emit(MatrixEventEvent.Decrypted, replyEvent);
messageEvent.emit(
MatrixEventEvent.Decrypted,
messageEvent,
undefined,
messageEvent.getPushDetails(),
);
replyEvent.emit(MatrixEventEvent.Decrypted, replyEvent, undefined, replyEvent.getPushDetails());
});

itShouldReturnTheRelatedEvents();
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31 changes: 21 additions & 10 deletions spec/unit/notifications.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,7 @@ describe("fixNotificationCountOnDecryption", () => {
mockClient = getMockClientWithEventEmitter({
...mockClientMethodsUser(),
isInitialSyncComplete: jest.fn().mockReturnValue(false),
getPushActionsForEvent: jest.fn().mockReturnValue(mkPushAction(true, true)),
getPushActionsForEvent: jest.fn((ev) => event.getPushActions() ?? mkPushAction(true, true)),
getRoom: jest.fn().mockImplementation(() => room),
decryptEventIfNeeded: jest.fn().mockResolvedValue(void 0),
supportsThreads: jest.fn().mockReturnValue(true),
Expand Down Expand Up @@ -125,15 +125,15 @@ describe("fixNotificationCountOnDecryption", () => {
room.setThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Total, 1);
room.setThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Highlight, 0);

event.getPushActions = jest.fn().mockReturnValue(mkPushAction(false, false));
threadEvent.getPushActions = jest.fn().mockReturnValue(mkPushAction(false, false));
event.getPushActions = jest.fn().mockReturnValue(mkPushAction(true, true));
threadEvent.getPushActions = jest.fn().mockReturnValue(mkPushAction(true, true));
});

it("changes the room count to highlight on decryption", () => {
expect(room.getUnreadNotificationCount(NotificationCountType.Total)).toBe(2);
expect(room.getUnreadNotificationCount(NotificationCountType.Highlight)).toBe(0);

fixNotificationCountOnDecryption(mockClient, event);
fixNotificationCountOnDecryption(mockClient, event, {});

expect(room.getUnreadNotificationCount(NotificationCountType.Total)).toBe(3);
expect(room.getUnreadNotificationCount(NotificationCountType.Highlight)).toBe(1);
Expand All @@ -143,7 +143,7 @@ describe("fixNotificationCountOnDecryption", () => {
room.setUnreadNotificationCount(NotificationCountType.Total, 0);
room.setUnreadNotificationCount(NotificationCountType.Highlight, 0);

fixNotificationCountOnDecryption(mockClient, event);
fixNotificationCountOnDecryption(mockClient, event, {});

expect(room.getRoomUnreadNotificationCount(NotificationCountType.Total)).toBe(1);
expect(room.getRoomUnreadNotificationCount(NotificationCountType.Highlight)).toBe(1);
Expand All @@ -153,7 +153,7 @@ describe("fixNotificationCountOnDecryption", () => {
expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Total)).toBe(1);
expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Highlight)).toBe(0);

fixNotificationCountOnDecryption(mockClient, threadEvent);
fixNotificationCountOnDecryption(mockClient, threadEvent, {});

expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Total)).toBe(2);
expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Highlight)).toBe(1);
Expand All @@ -163,7 +163,7 @@ describe("fixNotificationCountOnDecryption", () => {
room.setThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Total, 0);
room.setThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Highlight, 0);

fixNotificationCountOnDecryption(mockClient, event);
fixNotificationCountOnDecryption(mockClient, event, {});

expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Total)).toBe(0);
expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Highlight)).toBe(0);
Expand All @@ -187,7 +187,7 @@ describe("fixNotificationCountOnDecryption", () => {
event: true,
});

fixNotificationCountOnDecryption(mockClient, unknownThreadEvent);
fixNotificationCountOnDecryption(mockClient, unknownThreadEvent, {});

expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Total)).toBe(0);
expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Highlight)).toBe(0);
Expand All @@ -201,7 +201,7 @@ describe("fixNotificationCountOnDecryption", () => {
event.getPushActions = jest.fn().mockReturnValue(mkPushAction(true, false));
mockClient.getPushActionsForEvent = jest.fn().mockReturnValue(mkPushAction(false, false));

fixNotificationCountOnDecryption(mockClient, event);
fixNotificationCountOnDecryption(mockClient, event, {});
expect(room.getUnreadNotificationCount(NotificationCountType.Total)).toBe(0);
expect(room.getUnreadNotificationCount(NotificationCountType.Highlight)).toBe(0);
});
Expand All @@ -213,7 +213,7 @@ describe("fixNotificationCountOnDecryption", () => {
threadEvent.getPushActions = jest.fn().mockReturnValue(mkPushAction(true, false));
mockClient.getPushActionsForEvent = jest.fn().mockReturnValue(mkPushAction(false, false));

fixNotificationCountOnDecryption(mockClient, event);
fixNotificationCountOnDecryption(mockClient, event, {});
expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Total)).toBe(0);
expect(room.getThreadUnreadNotificationCount(THREAD_ID, NotificationCountType.Highlight)).toBe(0);
});
Expand All @@ -231,4 +231,15 @@ describe("fixNotificationCountOnDecryption", () => {
room.setThreadUnreadNotificationCount("$123", NotificationCountType.Highlight, 5);
expect(cb).toHaveBeenLastCalledWith({ highlight: 5 }, "$123");
});

it("should not increment notification count where event was already contributing notification", () => {
expect(room.getUnreadNotificationCount(NotificationCountType.Total)).toBe(2);
expect(room.getUnreadNotificationCount(NotificationCountType.Highlight)).toBe(0);

event.getPushActions = jest.fn().mockReturnValue(mkPushAction(true, false));
fixNotificationCountOnDecryption(mockClient, event, { actions: { notify: true, tweaks: {} } });

expect(room.getUnreadNotificationCount(NotificationCountType.Total)).toBe(2);
expect(room.getUnreadNotificationCount(NotificationCountType.Highlight)).toBe(0);
});
});
7 changes: 6 additions & 1 deletion spec/unit/room-state.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1037,7 +1037,12 @@ describe("RoomState", function () {

// this event is a message after decryption
decryptingRelatedEvent.event.type = EventType.RoomMessage;
decryptingRelatedEvent.emit(MatrixEventEvent.Decrypted, decryptingRelatedEvent);
decryptingRelatedEvent.emit(
MatrixEventEvent.Decrypted,
decryptingRelatedEvent,
undefined,
decryptingRelatedEvent.getPushDetails(),
);

expect(addLocationsSpy).not.toHaveBeenCalled();
});
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4 changes: 2 additions & 2 deletions spec/unit/room.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3428,13 +3428,13 @@ describe("Room", function () {
expect(room.polls.get(pollStartEventId)).toBeUndefined();

// now emit a Decrypted event but keep the decryption failure
pollStartEvent.emit(MatrixEventEvent.Decrypted, pollStartEvent);
pollStartEvent.emit(MatrixEventEvent.Decrypted, pollStartEvent, undefined, pollStartEvent.getPushDetails());
// still do not expect a poll to show up for the room
expect(room.polls.get(pollStartEventId)).toBeUndefined();

// clear decryption failure and emit a Decrypted event again
isDecryptionFailureSpy.mockRestore();
pollStartEvent.emit(MatrixEventEvent.Decrypted, pollStartEvent);
pollStartEvent.emit(MatrixEventEvent.Decrypted, pollStartEvent, undefined, pollStartEvent.getPushDetails());

// the poll should now show up in the room's polls
const poll = room.polls.get(pollStartEventId);
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73 changes: 34 additions & 39 deletions src/client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1371,8 +1371,8 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
// actions for themselves, so we have to kinda help them out when they are encrypted.
// We do this so that push rules are correctly executed on events in their decrypted
// state, such as highlights when the user's name is mentioned.
this.on(MatrixEventEvent.Decrypted, (event) => {
fixNotificationCountOnDecryption(this, event);
this.on(MatrixEventEvent.Decrypted, (event, _, pushDetails) => {
fixNotificationCountOnDecryption(this, event, pushDetails);
});

// Like above, we have to listen for read receipts from ourselves in order to
Expand Down Expand Up @@ -9851,26 +9851,23 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
* Servers do not have enough knowledge about encrypted events to calculate an
* accurate notification_count
*/
export function fixNotificationCountOnDecryption(cli: MatrixClient, event: MatrixEvent): void {
export function fixNotificationCountOnDecryption(
cli: MatrixClient,
event: MatrixEvent,
pushDetails: PushDetails,
): void {
const ourUserId = cli.getUserId();
const eventId = event.getId();

const room = cli.getRoom(event.getRoomId());
if (!room || !ourUserId || !eventId) return;

const oldActions = event.getPushActions();
// We cannot call event.getPushActions here as the decryption loop just nulled them for re-calculation
const oldActions = pushDetails.actions;
const actions = cli.getPushActionsForEvent(event, true);

const isThreadEvent = !!event.threadRootId && !event.isThreadRoot;

const currentHighlightCount = room.getUnreadCountForEventContext(NotificationCountType.Highlight, event);

// Ensure the unread counts are kept up to date if the event is encrypted
// We also want to make sure that the notification count goes up if we already
// have encrypted events to avoid other code from resetting 'highlight' to zero.
const oldHighlight = !!oldActions?.tweaks?.highlight;
const newHighlight = !!actions?.tweaks?.highlight;

let hasReadEvent;
if (isThreadEvent) {
const thread = room.getThread(event.threadRootId);
Expand All @@ -9892,37 +9889,35 @@ export function fixNotificationCountOnDecryption(cli: MatrixClient, event: Matri
return;
}

if (oldHighlight !== newHighlight || currentHighlightCount > 0) {
// TODO: Handle mentions received while the client is offline
// See also https://github.com/vector-im/element-web/issues/9069
let newCount = currentHighlightCount;
if (newHighlight && !oldHighlight) newCount++;
if (!newHighlight && oldHighlight) newCount--;

if (isThreadEvent) {
room.setThreadUnreadNotificationCount(event.threadRootId, NotificationCountType.Highlight, newCount);
// Ensure the unread counts are kept up to date if the event is encrypted
// We also want to make sure that the notification count goes up if we already
// have encrypted events to avoid other code from resetting 'highlight' to zero.
// TODO: Handle mentions received while the client is offline
// See also https://github.com/vector-im/element-web/issues/9069
for (const type of [NotificationCountType.Highlight, NotificationCountType.Total]) {
let count = room.getUnreadCountForEventContext(type, event);

let oldValue: boolean;
let newValue: boolean;
if (type === NotificationCountType.Total) {
// Total count is used to typically increment a room notification counter, but not loudly highlight it.
// `notify` is used in practice for incrementing the total count
oldValue = !!oldActions?.notify;
newValue = !!actions?.notify;
} else {
room.setUnreadNotificationCount(NotificationCountType.Highlight, newCount);
oldValue = !!oldActions?.tweaks?.highlight;
newValue = !!actions?.tweaks?.highlight;
}
}

// Total count is used to typically increment a room notification counter, but not loudly highlight it.
const currentTotalCount = room.getUnreadCountForEventContext(NotificationCountType.Total, event);
if (oldValue !== newValue || count > 0) {
if (newValue && !oldValue) count++;
if (!newValue && oldValue) count--;

// `notify` is used in practice for incrementing the total count
const newNotify = !!actions?.notify;

// The room total count is NEVER incremented by the server for encrypted rooms. We basically ignore
// the server here as it's always going to tell us to increment for encrypted events.
if (newNotify) {
if (isThreadEvent) {
room.setThreadUnreadNotificationCount(
event.threadRootId,
NotificationCountType.Total,
currentTotalCount + 1,
);
} else {
room.setUnreadNotificationCount(NotificationCountType.Total, currentTotalCount + 1);
if (isThreadEvent) {
room.setThreadUnreadNotificationCount(event.threadRootId, type, count);
} else {
room.setUnreadNotificationCount(type, count);
}
}
}
}
6 changes: 4 additions & 2 deletions src/models/event.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -226,7 +226,7 @@ export type MatrixEventHandlerMap = {
* @param event - The matrix event which has been decrypted
* @param err - The error that occurred during decryption, or `undefined` if no error occurred.
*/
[MatrixEventEvent.Decrypted]: (event: MatrixEvent, err?: Error) => void;
[MatrixEventEvent.Decrypted]: (event: MatrixEvent, err: Error | undefined, pushDetails: PushDetails) => void;
[MatrixEventEvent.BeforeRedaction]: (event: MatrixEvent, redactionEvent: MatrixEvent) => void;
[MatrixEventEvent.VisibilityChange]: (event: MatrixEvent, visible: boolean) => void;
[MatrixEventEvent.LocalEventIdReplaced]: (event: MatrixEvent) => void;
Expand Down Expand Up @@ -916,6 +916,8 @@ export class MatrixEvent extends TypedEventEmitter<MatrixEventEmittedEvents, Mat
this.retryDecryption = false;
this.setClearData(res);

const pushDetails = this.getPushDetails();

// Before we emit the event, clear the push actions so that they can be recalculated
// by relevant code. We do this because the clear event has now changed, making it
// so that existing rules can be re-run over the applicable properties. Stuff like
Expand All @@ -925,7 +927,7 @@ export class MatrixEvent extends TypedEventEmitter<MatrixEventEmittedEvents, Mat
this.setPushDetails();

if (options.emit !== false) {
this.emit(MatrixEventEvent.Decrypted, this, err);
this.emit(MatrixEventEvent.Decrypted, this, err, pushDetails);
}

return;
Expand Down

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