fixes for reading room state

Author: toger5

src/ClientWidgetApi.ts

@@ -530,18 +530,24 @@ export class ClientWidgetApi extends EventEmitter {
         // For backwards compatibility we still call the deprecated
         // readRoomEvents and readStateEvents methods in case the client isn't
         // letting us know the currently viewed room via setViewedRoomId
-        const events =
-            request.data.room_ids === undefined && askRoomIds.length === 0
-                ? await (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),
-                          ),
-                      )
-                  ).flat(1);
+        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)
+            )
+            : (
+                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 });
     }