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Reapply "Distinguish room state and timeline events in embedded clients" (#4790)

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This reverts commit fd9a44e701.

We are ready to reintroduce support for the `update_state` widget action (https://github.com/matrix-org/matrix-spec-proposals/pull/4237) now that matrix-rust-sdk is about to gain support for it as well.
This commit is contained in:
Robin
2025-05-20 12:03:24 -04:00
committed by GitHub
parent c35c7d1a3b
commit b8903ddf3e
2 changed files with 81 additions and 64 deletions
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56
spec/unit/embedded.spec.ts
View File

@@ -28,7 +28,6 @@ import {
WidgetApiToWidgetAction,
MatrixCapabilities,
type ITurnServer,
type IRoomEvent,
type IOpenIDCredentials,
type ISendEventFromWidgetResponseData,
WidgetApiResponseError,
@@ -634,12 +633,20 @@ describe("RoomWidgetClient", () => {
});
it("receives", async () => {
await makeClient({ receiveState: [{ eventType: "org.example.foo", stateKey: "bar" }] });
const init = makeClient({ receiveState: [{ eventType: "org.example.foo", stateKey: "bar" }] });
expect(widgetApi.requestCapabilityForRoomTimeline).toHaveBeenCalledWith("!1:example.org");
expect(widgetApi.requestCapabilityToReceiveState).toHaveBeenCalledWith("org.example.foo", "bar");
// Client needs to be told that the room state is loaded
widgetApi.emit(
`action:${WidgetApiToWidgetAction.UpdateState}`,
new CustomEvent(`action:${WidgetApiToWidgetAction.UpdateState}`, { detail: { data: { state: [] } } }),
);
await init;
const emittedEvent = new Promise<MatrixEvent>((resolve) => client.once(ClientEvent.Event, resolve));
const emittedSync = new Promise<SyncState>((resolve) => client.once(ClientEvent.Sync, resolve));
// Let's assume that a state event comes in but it doesn't actually
// update the state of the room just yet (maybe it's unauthorized)
widgetApi.emit(
`action:${WidgetApiToWidgetAction.SendEvent}`,
new CustomEvent(`action:${WidgetApiToWidgetAction.SendEvent}`, { detail: { data: event } }),
@@ -648,26 +655,43 @@ describe("RoomWidgetClient", () => {
// The client should've emitted about the received event
expect((await emittedEvent).getEffectiveEvent()).toEqual(event);
expect(await emittedSync).toEqual(SyncState.Syncing);
// It should've also inserted the event into the room object
// However it should not have changed the room state
const room = client.getRoom("!1:example.org");
expect(room).not.toBeNull();
expect(room!.currentState.getStateEvents("org.example.foo", "bar")).toBe(null);
// Now assume that the state event becomes favored by state
// resolution for whatever reason and enters into the current state
// of the room
widgetApi.emit(
`action:${WidgetApiToWidgetAction.UpdateState}`,
new CustomEvent(`action:${WidgetApiToWidgetAction.UpdateState}`, {
detail: { data: { state: [event] } },
}),
);
// It should now have changed the room state
expect(room!.currentState.getStateEvents("org.example.foo", "bar")?.getEffectiveEvent()).toEqual(event);
});
it("backfills", async () => {
widgetApi.readStateEvents.mockImplementation(async (eventType, limit, stateKey) =>
eventType === "org.example.foo" && (limit ?? Infinity) > 0 && stateKey === "bar"
? [event as IRoomEvent]
: [],
it("ignores state updates for other rooms", async () => {
const init = makeClient({ receiveState: [{ eventType: "org.example.foo", stateKey: "bar" }] });
// Client needs to be told that the room state is loaded
widgetApi.emit(
`action:${WidgetApiToWidgetAction.UpdateState}`,
new CustomEvent(`action:${WidgetApiToWidgetAction.UpdateState}`, { detail: { data: { state: [] } } }),
);
await init;
await makeClient({ receiveState: [{ eventType: "org.example.foo", stateKey: "bar" }] });
expect(widgetApi.requestCapabilityForRoomTimeline).toHaveBeenCalledWith("!1:example.org");
expect(widgetApi.requestCapabilityToReceiveState).toHaveBeenCalledWith("org.example.foo", "bar");
const room = client.getRoom("!1:example.org");
expect(room).not.toBeNull();
expect(room!.currentState.getStateEvents("org.example.foo", "bar")?.getEffectiveEvent()).toEqual(event);
// Now a room we're not interested in receives a state update
widgetApi.emit(
`action:${WidgetApiToWidgetAction.UpdateState}`,
new CustomEvent(`action:${WidgetApiToWidgetAction.UpdateState}`, {
detail: { data: { state: [{ ...event, room_id: "!other-room:example.org" }] } },
}),
);
// No change to the room state
for (const room of client.getRooms()) {
expect(room.currentState.getStateEvents("org.example.foo", "bar")).toBe(null);
}
});
});

89
src/embedded.ts
View File

@@ -28,6 +28,7 @@ import {
type WidgetApiAction,
type IWidgetApiResponse,
type IWidgetApiResponseData,
type IUpdateStateToWidgetActionRequest,
} from "matrix-widget-api";
import { MatrixEvent, type IEvent, type IContent, EventStatus } from "./models/event.ts";
@@ -135,6 +136,7 @@ export type EventHandlerMap = { [RoomWidgetClientEvent.PendingEventsChanged]: ()
export class RoomWidgetClient extends MatrixClient {
private room?: Room;
private readonly widgetApiReady: Promise<void>;
private readonly roomStateSynced: Promise<void>;
private lifecycle?: AbortController;
private syncState: SyncState | null = null;
@@ -188,6 +190,11 @@ export class RoomWidgetClient extends MatrixClient {
};
this.widgetApiReady = new Promise<void>((resolve) => this.widgetApi.once("ready", resolve));
this.roomStateSynced = capabilities.receiveState?.length
? new Promise<void>((resolve) =>
this.widgetApi.once(`action:${WidgetApiToWidgetAction.UpdateState}`, resolve),
)
: Promise.resolve();
// Request capabilities for the functionality this client needs to support
if (
@@ -240,6 +247,7 @@ export class RoomWidgetClient extends MatrixClient {
widgetApi.on(`action:${WidgetApiToWidgetAction.SendEvent}`, this.onEvent);
widgetApi.on(`action:${WidgetApiToWidgetAction.SendToDevice}`, this.onToDevice);
widgetApi.on(`action:${WidgetApiToWidgetAction.UpdateState}`, this.onStateUpdate);
// Open communication with the host
widgetApi.start();
@@ -275,28 +283,6 @@ export class RoomWidgetClient extends MatrixClient {
await this.widgetApiReady;
// Backfill the requested events
// We only get the most recent event for every type + state key combo,
// so it doesn't really matter what order we inject them in
await Promise.all(
this.capabilities.receiveState?.map(async ({ eventType, stateKey }) => {
const rawEvents = await this.widgetApi.readStateEvents(eventType, undefined, stateKey, [this.roomId]);
const events = rawEvents.map((rawEvent) => new MatrixEvent(rawEvent as Partial<IEvent>));
if (this.syncApi instanceof SyncApi) {
// Passing undefined for `stateAfterEventList` allows will make `injectRoomEvents` run in legacy mode
// -> state events in `timelineEventList` will update the state.
await this.syncApi.injectRoomEvents(this.room!, undefined, events);
} else {
await this.syncApi!.injectRoomEvents(this.room!, events); // Sliding Sync
}
events.forEach((event) => {
this.emit(ClientEvent.Event, event);
logger.info(`Backfilled event ${event.getId()} ${event.getType()} ${event.getStateKey()}`);
});
}) ?? [],
);
if (opts.clientWellKnownPollPeriod !== undefined) {
this.clientWellKnownIntervalID = setInterval(() => {
this.fetchClientWellKnown();
@@ -304,8 +290,9 @@ export class RoomWidgetClient extends MatrixClient {
this.fetchClientWellKnown();
}
await this.roomStateSynced;
this.setSyncState(SyncState.Syncing);
logger.info("Finished backfilling events");
logger.info("Finished initial sync");
this.matrixRTC.start();
@@ -316,6 +303,7 @@ export class RoomWidgetClient extends MatrixClient {
public stopClient(): void {
this.widgetApi.off(`action:${WidgetApiToWidgetAction.SendEvent}`, this.onEvent);
this.widgetApi.off(`action:${WidgetApiToWidgetAction.SendToDevice}`, this.onToDevice);
this.widgetApi.off(`action:${WidgetApiToWidgetAction.UpdateState}`, this.onStateUpdate);
super.stopClient();
this.lifecycle!.abort(); // Signal to other async tasks that the client has stopped
@@ -600,36 +588,15 @@ export class RoomWidgetClient extends MatrixClient {
// Only inject once we have update the txId
await this.updateTxId(event);
// The widget API does not tell us whether a state event came from `state_after` or not so we assume legacy behaviour for now.
if (this.syncApi instanceof SyncApi) {
// The code will want to be something like:
// ```
// if (!params.addToTimeline && !params.addToState) {
// // Passing undefined for `stateAfterEventList` makes `injectRoomEvents` run in "legacy mode"
// // -> state events part of the `timelineEventList` parameter will update the state.
// this.injectRoomEvents(this.room!, [], undefined, [event]);
// } else {
// this.injectRoomEvents(this.room!, undefined, params.addToState ? [event] : [], params.addToTimeline ? [event] : []);
// }
// ```
// Passing undefined for `stateAfterEventList` allows will make `injectRoomEvents` run in legacy mode
// -> state events in `timelineEventList` will update the state.
await this.syncApi.injectRoomEvents(this.room!, [], undefined, [event]);
await this.syncApi.injectRoomEvents(this.room!, undefined, [], [event]);
} else {
// The code will want to be something like:
// ```
// if (!params.addToTimeline && !params.addToState) {
// this.injectRoomEvents(this.room!, [], [event]);
// } else {
// this.injectRoomEvents(this.room!, params.addToState ? [event] : [], params.addToTimeline ? [event] : []);
// }
// ```
await this.syncApi!.injectRoomEvents(this.room!, [], [event]); // Sliding Sync
// Sliding Sync
await this.syncApi!.injectRoomEvents(this.room!, [], [event]);
}
this.emit(ClientEvent.Event, event);
this.setSyncState(SyncState.Syncing);
logger.info(`Received event ${event.getId()} ${event.getType()} ${event.getStateKey()}`);
logger.info(`Received event ${event.getId()} ${event.getType()}`);
} else {
const { event_id: eventId, room_id: roomId } = ev.detail.data;
logger.info(`Received event ${eventId} for a different room ${roomId}; discarding`);
@@ -654,6 +621,32 @@ export class RoomWidgetClient extends MatrixClient {
await this.ack(ev);
};
private onStateUpdate = async (ev: CustomEvent<IUpdateStateToWidgetActionRequest>): Promise<void> => {
ev.preventDefault();
for (const rawEvent of ev.detail.data.state) {
// Verify the room ID matches, since it's possible for the client to
// send us state updates from other rooms if this widget is always
// on screen
if (rawEvent.room_id === this.roomId) {
const event = new MatrixEvent(rawEvent as Partial<IEvent>);
if (this.syncApi instanceof SyncApi) {
await this.syncApi.injectRoomEvents(this.room!, undefined, [event]);
} else {
// Sliding Sync
await this.syncApi!.injectRoomEvents(this.room!, [event]);
}
logger.info(`Updated state entry ${event.getType()} ${event.getStateKey()} to ${event.getId()}`);
} else {
const { event_id: eventId, room_id: roomId } = ev.detail.data;
logger.info(`Received state entry ${eventId} for a different room ${roomId}; discarding`);
}
}
await this.ack(ev);
};
private async watchTurnServers(): Promise<void> {
const servers = this.widgetApi.getTurnServers();
const onClientStopped = (): void => {