Add fetching the well known in embedded mode. (#4259)

* Add fetching the well known in embedded mode.

This is used to load the focus from the well known in elment-call.

* revert what we dont want in this PR.

* Update src/client.ts

Co-authored-by: Andrew Ferrazzutti <andrewf@element.io>

---------

Co-authored-by: Andrew Ferrazzutti <andrewf@element.io>

src/client.ts

@@ -7410,7 +7410,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
         return this.http.authedRequest(Method.Post, path, undefined, undefined, { prefix: "" });
     }
 
-    private async fetchClientWellKnown(): Promise<void> {
+    protected async fetchClientWellKnown(): Promise<void> {
         // `getRawClientConfig` does not throw or reject on network errors, instead
         // it absorbs errors and returns `{}`.
         this.clientWellKnownPromise = AutoDiscovery.getRawClientConfig(this.getDomain() ?? undefined);

src/embedded.ts

@@ -218,6 +218,14 @@ export class RoomWidgetClient extends MatrixClient {
                 });
             }) ?? [],
         );
+
+        if (opts.clientWellKnownPollPeriod !== undefined) {
+            this.clientWellKnownIntervalID = setInterval(() => {
+                this.fetchClientWellKnown();
+            }, 1000 * opts.clientWellKnownPollPeriod);
+            this.fetchClientWellKnown();
+        }
+
         this.setSyncState(SyncState.Syncing);
         logger.info("Finished backfilling events");