[No QA] Background refresh for Android

src/libs/Notification/PushNotification/backgroundRefresh/index.android.js

@@ -0,0 +1,40 @@
+import Onyx from 'react-native-onyx';
+import * as App from '../../../actions/App';
+import Visibility from '../../../Visibility';
+import ONYXKEYS from '../../../../ONYXKEYS';
+
+function getLastOnyxUpdateID() {
+    return new Promise((resolve) => {
+        const connectionID = Onyx.connect({
+            key: ONYXKEYS.ONYX_UPDATES.LAST_UPDATE_ID,
+            callback: (lastUpdateID) => {
+                Onyx.disconnect(connectionID);
+                resolve(lastUpdateID);
+            },
+        });
+    });
+}
+
+/**
+ * Runs our reconnectApp action if the app is in the background.
+ *
+ * We use this to refresh the app in the background after receiving a push notification (native only). Since the full app
+ * wakes on iOS and by extension runs reconnectApp already, this is a no-op on everything but Android.
+ */
+export default function backgroundRefresh() {
+    if (Visibility.isVisible()) {
+        return;
+    }
+
+    getLastOnyxUpdateID().then((lastUpdateID) => {
+        /**
+         * ReconnectApp waits on the isReadyToOpenApp promise to resolve and this normally only resolves when the LHN is rendered.
+         * However on Android, this callback is run in the background using a Headless JS task which does not render the React UI,
+         * so we must manually run confirmReadyToOpenApp here instead.
+         *
+         * See more here: https://reactnative.dev/docs/headless-js-android
+         */
+        App.confirmReadyToOpenApp();
+        App.reconnectApp(lastUpdateID);
+    });
+}

src/libs/Notification/PushNotification/backgroundRefresh/index.js

@@ -0,0 +1,7 @@
+/**
+ * Runs our reconnectApp action if the app is in the background.
+ *
+ * We use this to refresh the app in the background after receiving a push notification (native only). Since the full app
+ * wakes on iOS and by extension runs reconnectApp already, this is a no-op on everything but Android.
+ */
+export default function backgroundRefresh() {}

src/libs/Notification/PushNotification/subscribeToReportCommentPushNotifications.js

@@ -4,6 +4,7 @@ import ROUTES from '../../../ROUTES';
 import Log from '../../Log';
 import Navigation from '../../Navigation/Navigation';
 import Visibility from '../../Visibility';
+import backgroundRefresh from './backgroundRefresh';
 
 /**
  * Setup reportComment push notification callbacks.
@@ -12,6 +13,7 @@ export default function subscribeToReportCommentPushNotifications() {
     PushNotification.onReceived(PushNotification.TYPE.REPORT_COMMENT, ({reportID, reportActionID, onyxData}) => {
         Log.info(`[PushNotification] received report comment notification in the ${Visibility.isVisible() ? 'foreground' : 'background'}`, false, {reportID, reportActionID});
         Onyx.update(onyxData);
+        backgroundRefresh();
     });
 
     // Open correct report when push notification is clicked