feat(recording): Move RECORDER_STATE_CHANGED handling to Redux

conference.js

     redirectWithStoredParams,
     reloadWithStoredParams
 } from './react/features/app';
-import { updateRecordingSessionData } from './react/features/recording';
 
 import EventEmitter from 'events';
 
                     return;
                 }
 
-                if (recorderSession.getID()) {
-                    APP.store.dispatch(
-                        updateRecordingSessionData(recorderSession));
-
-                    return;
-                }
-
                 // These errors fire when the local participant has requested a
                 // recording but the request itself failed, hence the missing
                 // session ID because the recorder never started.

react/features/recording/index.js

 export * from './constants';
 export * from './functions';
 
+import './middleware';
 import './reducer';

react/features/recording/middleware.js

+/* @flow */
+
+import { CONFERENCE_WILL_JOIN } from '../base/conference';
+import { JitsiConferenceEvents } from '../base/lib-jitsi-meet';
+import { MiddlewareRegistry } from '../base/redux';
+
+import { updateRecordingSessionData } from './actions';
+
+/**
+ * The redux middleware to handle the recorder updates in a React way.
+ *
+ * @param {Store} store - The redux store.
+ * @returns {Function}
+ */
+MiddlewareRegistry.register(({ dispatch }) => next => action => {
+    const result = next(action);
+
+    switch (action.type) {
+    case CONFERENCE_WILL_JOIN: {
+        const { conference } = action;
+
+        conference.on(
+            JitsiConferenceEvents.RECORDER_STATE_CHANGED,
+            recorderSession => {
+
+                if (recorderSession && recorderSession.getID()) {
+                    dispatch(
+                        updateRecordingSessionData(recorderSession));
+
+                    return;
+                }
+            });
+
+        break;
+    }
+    }
+
+    return result;
+});