fixes for reading room state

Author: toger5

src/ClientWidgetApi.ts

@@ -520,14 +520,21 @@ export class ClientWidgetApi extends EventEmitter {
         // letting us know the currently viewed room via setViewedRoomId
         const events = request.data.room_ids === undefined && askRoomIds.length === 0
             ? await (
+                // This returns [] with the current driver of Element Web.
+                // Add default implementations of the `readRoomEvents` and `readStateEvents`
+                // methods to use `readRoomTimeline` and `readRoomState` if they are not overwritten.
                 request.data.state_key === undefined
                     ? this.driver.readRoomEvents(request.data.type, msgtype, limit, null, since)
                     : this.driver.readStateEvents(request.data.type, stateKey, limit, null)
             )
             : (
-                await Promise.all(askRoomIds.map(roomId =>
-                    this.driver.readRoomTimeline(roomId, request.data.type, msgtype, stateKey, limit, since),
-                ))
+                request.data.state_key === undefined
+                    ? await Promise.all(askRoomIds.map(roomId =>
+                        this.driver.readRoomTimeline(roomId, request.data.type, msgtype, stateKey, limit, since),
+                    ))
+                    : await Promise.all(askRoomIds.map(roomId =>
+                        this.driver.readRoomState(roomId, request.data.type, stateKey),
+                    ))
             ).flat(1);
         this.transport.reply<IReadEventFromWidgetResponseData>(request, { events });
     }