[RN] Move all mobile only features to a subdirectory

react/features/mobile/wake-lock/middleware.js

@@ -0,0 +1,54 @@
+import KeepAwake from 'react-native-keep-awake';
+
+import {
+    CONFERENCE_FAILED,
+    CONFERENCE_JOINED,
+    CONFERENCE_LEFT
+} from '../../base/conference';
+import { MiddlewareRegistry } from '../../base/redux';
+
+/**
+ * Middleware that captures conference actions and activates or deactivates the
+ * wake lock accordingly. If the wake lock is active, it will prevent the screen
+ * from dimming.
+ *
+ * @param {Store} store - Redux store.
+ * @returns {Function}
+ */
+MiddlewareRegistry.register(store => next => action => {
+    switch (action.type) {
+    case CONFERENCE_JOINED: {
+        const state = store.getState()['features/base/conference'];
+
+        // TODO(saghul): Implement audio-only mode.
+        if (!state.audioOnly) {
+            _setWakeLock(true);
+        }
+        break;
+    }
+
+    case CONFERENCE_FAILED:
+    case CONFERENCE_LEFT:
+        _setWakeLock(false);
+        break;
+    }
+
+    return next(action);
+});
+
+/**
+ * Activates/deactivates the wake lock. If the wake lock is active, it will
+ * prevent the screen from dimming.
+ *
+ * @param {boolean} wakeLock - True to active the wake lock or false to
+ * deactivate it.
+ * @private
+ * @returns {void}
+ */
+function _setWakeLock(wakeLock) {
+    if (wakeLock) {
+        KeepAwake.activate();
+    } else {
+        KeepAwake.deactivate();
+    }
+}