[RN] Move all mobile only features to a subdirectory

react/features/mobile/audio-mode/middleware.js

@@ -0,0 +1,61 @@
+/* @flow */
+
+import { NativeModules } from 'react-native';
+
+import { APP_WILL_MOUNT } from '../../app';
+import {
+    CONFERENCE_FAILED,
+    CONFERENCE_LEFT,
+    CONFERENCE_WILL_JOIN
+} from '../../base/conference';
+import { MiddlewareRegistry } from '../../base/redux';
+
+/**
+ * Middleware that captures conference actions and sets the correct audio mode
+ * based on the type of conference. Audio-only conferences don't use the speaker
+ * by default, and video conferences do.
+ *
+ * @param {Store} store - Redux store.
+ * @returns {Function}
+ */
+MiddlewareRegistry.register(store => next => action => {
+    const AudioMode = NativeModules.AudioMode;
+
+    // The react-native module AudioMode is implemented on iOS at the time of
+    // this writing.
+    if (AudioMode) {
+        let mode;
+
+        switch (action.type) {
+        case APP_WILL_MOUNT:
+        case CONFERENCE_FAILED:
+        case CONFERENCE_LEFT:
+            mode = AudioMode.DEFAULT;
+            break;
+
+        case CONFERENCE_WILL_JOIN: {
+            const conference = store.getState()['features/base/conference'];
+
+            mode
+                = conference.audioOnly
+                    ? AudioMode.AUDIO_CALL
+                    : AudioMode.VIDEO_CALL;
+            break;
+        }
+
+        default:
+            mode = null;
+            break;
+        }
+
+        if (mode !== null) {
+            AudioMode.setMode(mode)
+                .catch(err =>
+                    console.error(
+                            `Failed to set audio mode ${String(mode)}: `
+                                + `${err}`));
+        }
+    }
+
+    return next(action);
+});