Implemented version checking

ios/Podfile.lock

@@ -75,9 +75,9 @@ PODS:
   - FMDB (2.7.5):
     - FMDB/standard (= 2.7.5)
   - FMDB/standard (2.7.5)
-  - geolocator (5.3.1):
+  - geolocator (5.3.0):
     - Flutter
-  - google_api_availability (2.0.4):
+  - google_api_availability (2.0.3):
     - Flutter
   - google_maps_flutter (0.0.1):
     - Flutter
@@ -260,8 +260,8 @@ SPEC CHECKSUMS:
   Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
   flutter_plugin_android_lifecycle: 47de533a02850f070f5696a623995e93eddcdb9b
   FMDB: 2ce00b547f966261cd18927a3ddb07cb6f3db82a
-  geolocator: 460cc8e850b616f8c0e90944c86517d91ccbb686
-  google_api_availability: 15fa42a8cd83c0a6738507ffe6e87096f12abcb8
+  geolocator: 7cdcf71180b80913b3cd84ab715d3b5365b378af
+  google_api_availability: 526574c9a5a0ae541e18c65f98e47afc11f53c8b
   google_maps_flutter: d0dd62f5a7d39bae61057eb9f52dd778d99c7c6c
   GoogleAppMeasurement: 434cc7be25e71dc04b8d0e3079125127b330e84a
   GoogleDataTransport: 166f9b9f82cbf60a204e8fe2daa9db3e3ec1fb15

lib/constants.dart

@@ -1,3 +1,11 @@
 final bool debugRelease = false;
 //final String testingServer = "https://test.covid-19.health.gov.lk/api";
 final String testingServer = "https://test.covid-19.health.gov.lk/api";
+
+//Constants defined for version checking
+const String ANDROID_APP_BUILD_NUMBER_KEY = "android_app_builder_number_Key";
+const String IOS_APP_BUILD_NUMBER_KEY = "ios_app_builder_number_key";
+const String ANDROID_APP_URL =
+    "https://play.google.com/store/apps/details?id=app.ceylon.selftrackingapp";
+const String IOS_APP_URL =
+    "https://apps.apple.com/us/app/myhealth-sri-lanka/id1503349513";

lib/main.dart

@@ -1,9 +1,10 @@
 import 'dart:async';
 
-import 'dart:async';
-import 'dart:io';
-
+import 'package:connectivity/connectivity.dart';
+import 'package:dropdown_banner/dropdown_banner.dart';
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:get_it/get_it.dart';
 import 'package:selftrackingapp/app_localizations.dart';
@@ -12,10 +13,8 @@ import 'package:selftrackingapp/networking/db.dart';
 import 'package:selftrackingapp/page/screen/root_screen.dart';
 import 'package:selftrackingapp/page/screen/welcome_screen.dart';
 import 'package:shared_preferences/shared_preferences.dart';
-import 'package:connectivity/connectivity.dart';
-import 'package:flutter/services.dart';
+
 import 'utils/tracker_colors.dart';
-import 'package:dropdown_banner/dropdown_banner.dart';
 
 void main() {
   runApp(MyApp());
@@ -79,6 +78,7 @@ class _HomeScreenState extends State<HomeScreen> {
   @override
   void initState() {
     super.initState();
+
     _isTimeoutCompleted = false;
     SystemChrome.setPreferredOrientations([
       DeviceOrientation.portraitUp,

lib/page/screen/root_screen.dart

@@ -1,5 +1,9 @@
+import 'dart:io';
+
 import 'package:async/async.dart';
 import 'package:firebase_messaging/firebase_messaging.dart';
+import 'package:firebase_remote_config/firebase_remote_config.dart';
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:package_info/package_info.dart';
 import 'package:provider/provider.dart';
@@ -8,20 +12,17 @@ import 'package:selftrackingapp/models/news_article.dart';
 import 'package:selftrackingapp/networking/api_client.dart';
 import 'package:selftrackingapp/notifiers/registered_cases_model.dart';
 import 'package:selftrackingapp/notifiers/stories_model.dart';
-import 'package:selftrackingapp/page/screen/case_list_screen.dart';
-import 'package:selftrackingapp/page/screen/contact_us_screen.dart';
 import 'package:selftrackingapp/page/screen/dashboard_screen.dart';
 import 'package:selftrackingapp/page/screen/faq_screen.dart';
 import 'package:selftrackingapp/page/screen/privacy_policy_screen.dart';
 import 'package:selftrackingapp/page/screen/welcome_screen.dart';
 import 'package:selftrackingapp/utils/tracker_colors.dart';
-import 'package:selftrackingapp/widgets/custom_text.dart';
 import 'package:titled_navigation_bar/titled_navigation_bar.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 import '../../app_localizations.dart';
-import '../ios_faq.dart';
-import 'case_details_screen.dart';
 import 'case_details_map_screen.dart';
+import 'case_details_screen.dart';
 
 enum RootTab { HomeTab, CaseTab, ContactTab, RegisterTab }
 
@@ -67,6 +68,7 @@ class _RootScreenState extends State<RootScreen> {
       }
     });
     _fetchCaseLatest();
+    _appVersionCheck();
   }
 
   void _handleFCM(Map<String, dynamic> message) async {
@@ -240,4 +242,99 @@ class _RootScreenState extends State<RootScreen> {
       ];
     }
   }
+
+//check for the latest build number set in the firebase remote config
+//and show update dialog if necessary
+  void _appVersionCheck() async {
+    String key = Platform.isIOS
+        ? IOS_APP_BUILD_NUMBER_KEY
+        : ANDROID_APP_BUILD_NUMBER_KEY;
+
+    //Get Current buildNumber of the app
+    final PackageInfo info = await PackageInfo.fromPlatform();
+
+    //In Android this refers to [versionCode]. In iOS [CFBundleVersion]
+    int currentBuildNumber = int.parse(info.buildNumber);
+
+    //Get Latest version info from firebase config
+    final RemoteConfig remoteConfig = await RemoteConfig.instance;
+
+    try {
+      await remoteConfig
+          .setDefaults(<String, dynamic>{key: currentBuildNumber});
+
+      // Using default duration to force fetching from remote server.
+      await remoteConfig.fetch(expiration: const Duration(seconds: 0));
+      await remoteConfig.activateFetched();
+
+      int remoteBuildNumber = remoteConfig.getInt(key);
+
+      if (remoteBuildNumber > currentBuildNumber) {
+        _showUpdateDialog();
+      }
+    } on FetchThrottledException catch (exception) {
+      // Fetch throttled.
+      print(exception);
+    } catch (exception) {
+      print('Unable to fetch remote config. Default value will be used');
+    }
+  }
+
+  void _showUpdateDialog() async {
+    bool isIOS = Platform.isIOS;
+    String title = "New Update Available";
+    String message =
+        "There is a newer version of the app available. Please update now.";
+    String affirmativeLabel = "Update Now";
+    String negativeLabel = "Later";
+
+    isIOS
+        ? showCupertinoDialog(
+        context: context,
+        builder: (context) {
+          return CupertinoAlertDialog(
+            title: Text(title),
+            content: Text(message),
+            actions: <Widget>[
+              CupertinoDialogAction(
+                isDefaultAction: true,
+                child: Text(affirmativeLabel),
+                onPressed: () => launchAppStore(IOS_APP_URL),
+              ),
+              CupertinoDialogAction(
+                child: Text(negativeLabel),
+                onPressed: () => Navigator.pop(context),
+              ),
+            ],
+          );
+        })
+        : showDialog(
+      context: context,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          title: Text(title),
+          content: Text(message),
+          actions: <Widget>[
+            FlatButton(
+              child: Text(
+                affirmativeLabel.toUpperCase(),
+                style: TextStyle(color: Colors.blue),
+              ),
+              onPressed: () => launchAppStore(ANDROID_APP_URL),
+            ),
+            FlatButton(
+              child: Text(negativeLabel.toUpperCase()),
+              onPressed: () => Navigator.pop(context),
+            ),
+          ],
+        );
+      },
+    );
+  }
+
+  void launchAppStore(String url) async {
+    if (await canLaunch(url)) {
+      launch(url);
+    }
+  }
 }

pubspec.yaml

@@ -11,7 +11,7 @@ description: Self tracking app
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 1.14.0+31
+version: 1.14.0+32
 
 environment:
     sdk: ">=2.1.0 <3.0.0"