Background sync support

ReactNativeClient/lib/poor-man-intervals.js

@@ -0,0 +1,50 @@
+import { time } from 'lib/time-utils.js';
+
+class PoorManIntervals {
+
+	static setInterval(callback, interval) {
+		PoorManIntervals.intervalId_++;
+
+		PoorManIntervals.intervals_.push({
+			id: PoorManIntervals.intervalId_,
+			callback: callback,
+			interval: interval,
+			lastIntervalTime: time.unixMs(),
+		});
+
+		return PoorManIntervals.intervalId_;
+	}
+
+	static intervalById(id) {
+		for (let i = 0; i < PoorManIntervals.intervals_.length; i++) {
+			if (PoorManIntervals.intervals_[i].id == id) return PoorManIntervals.intervals_[id];
+		}
+		return null;
+	}
+
+	static clearInterval(id) {
+		for (let i = 0; i < PoorManIntervals.intervals_.length; i++) {
+			if (PoorManIntervals.intervals_[i].id == id) {
+				PoorManIntervals.intervals_.splice(i, 1);
+				break;
+			}
+		}
+	}
+
+	static update() {
+		for (let i = 0; i < PoorManIntervals.intervals_.length; i++) {
+			let interval = PoorManIntervals.intervals_[i];
+			const now = time.unixMs();
+			if (now - interval.lastIntervalTime >= interval.interval) {
+				interval.lastIntervalTime = now;
+				interval.callback();
+			}
+		}
+	}
+
+}
+
+PoorManIntervals.intervalId_ = 0;
+PoorManIntervals.intervals_ = [];
+
+export { PoorManIntervals }

ReactNativeClient/root.js

@@ -34,6 +34,7 @@ import { DatabaseDriverReactNative } from 'lib/database-driver-react-native';
 import { reg } from 'lib/registry.js';
 import { _, setLocale } from 'lib/locale.js';
 import RNFetchBlob from 'react-native-fetch-blob';
+import { PoorManIntervals } from 'lib/poor-man-intervals.js';
 
 let defaultState = {
 	notes: [],
@@ -303,6 +304,10 @@ const reducer = (state = defaultState, action) => {
 		throw error;
 	}
 
+	// Check the registered intervals here since we know this function
+	// will be called regularly.
+	PoorManIntervals.update();
+
 	return newState;
 }
 
@@ -410,6 +415,11 @@ async function initialize(dispatch, backButtonHandler) {
 		return backButtonHandler();
 	});
 
+	PoorManIntervals.setInterval(() => {
+		reg.logger().info('Running background sync on timer...');
+		reg.scheduleSync(1);
+	}, 1000 * 60 * 5);
+
 	initializationState_ = 'done';
 
 	reg.logger().info('Application initialized');