✨ (feat) Auto update screen added

lib/page/common/splash.dart

@@ -1,13 +1,18 @@
+import 'dart:convert';
 import 'dart:io';
-
+import 'package:firebase_remote_config/firebase_remote_config.dart';
 import 'package:flutter/cupertino.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_twitter_clone/helper/enum.dart';
 import 'package:flutter_twitter_clone/helper/theme.dart';
+import 'package:flutter_twitter_clone/helper/utility.dart';
 import 'package:flutter_twitter_clone/page/Auth/selectAuthMethod.dart';
+import 'package:flutter_twitter_clone/page/common/updateApp.dart';
 import 'package:flutter_twitter_clone/page/homePage.dart';
 import 'package:flutter_twitter_clone/state/authState.dart';
 import 'package:flutter_twitter_clone/widgets/customWidgets.dart';
+import 'package:package_info/package_info.dart';
 import 'package:provider/provider.dart';
 
 class SplashPage extends StatefulWidget {
@@ -27,11 +32,73 @@ class _SplashPageState extends State<SplashPage> {
   }
 
   void timer() async {
-    Future.delayed(Duration(seconds: 1)).then((_) {
-      var state = Provider.of<AuthState>(context, listen: false);
-      // state.authStatus = AuthStatus.NOT_DETERMINED;
-      state.getCurrentUser();
-    });
+    final isAppUpdated = await _checkAppVersion();
+    if (isAppUpdated) {
+      print("App is updated");
+      Future.delayed(Duration(seconds: 1)).then((_) {
+        var state = Provider.of<AuthState>(context, listen: false);
+        // state.authStatus = AuthStatus.NOT_DETERMINED;
+        state.getCurrentUser();
+      });
+    }
+  }
+  /// Return installed app version 
+  /// For testing purpose in debug mode update screen will not be open up
+  /// In  an old version of  realease app is installed on user's device then 
+  /// User will not be able to see home screen 
+  /// User will redirected to update app screen.
+  /// Once user update app with latest verson and back to app then user automatically redirected to welcome / Home page
+  Future<bool> _checkAppVersion() async {
+    PackageInfo packageInfo = await PackageInfo.fromPlatform();
+    final currentAppVersion = "${packageInfo.version}";
+    final appVersion = await _getAppVersionFromFirebaseConfig();
+    if (appVersion != currentAppVersion) {
+      if(kDebugMode){
+        cprint("Latest version of app is not installed on your system");
+        cprint("In debug mode we are not restrict devlopers to redirect to update screen");
+        cprint("Redirect devs to update screen can put other devs in confusion");
+        return true;
+      }
+      Navigator.pushReplacement(
+        context,
+        MaterialPageRoute(
+          builder: (_) => UpdateApp(),
+        ),
+      );
+      return false;
+    } else {
+      return true;
+    }
+  }
+
+  /// Returns app version from firebase config
+  /// Fecth Latest app version from firebase Remote config
+  /// To check current installed app version check [version] in pubspec.yaml
+  /// you have to add latest app version in firebase remote config
+  /// To fetch this key go to project setting in firebase
+  /// Click on `cloud messaging` tab
+  /// Copy server key from `Project credentials`
+  /// Now goto `Remote Congig` section in fireabse
+  /// Add [appVersion]  as paramerter key and below json in Default vslue
+  ///  ``` json
+  ///  {
+  ///    "key": "1.0.0"
+  ///  } ```
+  /// After adding app version key click on Publish Change button
+  /// For package detail check:-  https://pub.dev/packages/firebase_remote_config#-readme-tab-
+  Future<String> _getAppVersionFromFirebaseConfig() async {
+    final RemoteConfig remoteConfig = await RemoteConfig.instance;
+    await remoteConfig.fetch(expiration: const Duration(minutes: 1));
+    await remoteConfig.activateFetched();
+    var data = remoteConfig.getString('appVersion');
+    if (data != null && data.isNotEmpty) {
+      return jsonDecode(data)["key"];
+    } else {
+      cprint(
+          "Please add your app's current version into Remote config in firebase",
+          errorIn: "_getAppVersionFromFirebaseConfig");
+      return null;
+    }
   }
 
   Widget _body() {

lib/page/common/updateApp.dart

@@ -0,0 +1,79 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_twitter_clone/helper/theme.dart';
+import 'package:flutter_twitter_clone/helper/utility.dart';
+import 'package:flutter_twitter_clone/page/common/splash.dart';
+import 'package:flutter_twitter_clone/widgets/customWidgets.dart';
+import 'package:flutter_twitter_clone/widgets/newWidget/title_text.dart';
+
+class UpdateApp extends StatefulWidget {
+  const UpdateApp({Key key}) : super(key: key);
+
+  @override
+  _UpdateAppState createState() => _UpdateAppState();
+}
+
+class _UpdateAppState extends State<UpdateApp> with WidgetsBindingObserver {
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addObserver(this);
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.dispose();
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      Navigator.pushReplacement(
+          context, MaterialPageRoute(builder: (context) => SplashPage()));
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: TwitterColor.mystic,
+      body: Container(
+        margin: EdgeInsets.symmetric(horizontal: 36),
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Image.asset("assets/images/icon-480.png"),
+            TitleText(
+              "New Update is available",
+              fontSize: 25,
+              textAlign: TextAlign.center,
+            ),
+            SizedBox(height: 20),
+            TitleText(
+              "The current version of app is no longer supported. We aploigize for any inconveiience we may have caused you",
+              fontSize: 14,
+              color: AppColor.darkGrey,
+              textAlign: TextAlign.center,
+            ),
+            SizedBox(height: 30),
+            Container(
+              width: fullWidth(context),
+              margin: EdgeInsets.symmetric(vertical: 35),
+              child: FlatButton(
+                shape: RoundedRectangleBorder(
+                    borderRadius: BorderRadius.circular(30)),
+                color: TwitterColor.dodgetBlue,
+                onPressed: () {
+                  launchURL(
+                      "https://play.google.com/store/apps/details?id=com.thealphamerc.flutter_twitter_clone");
+                },
+                padding: EdgeInsets.symmetric(horizontal: 30, vertical: 10),
+                child: TitleText('Update now', color: Colors.white),
+              ),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/state/chats/chatState.dart

@@ -81,7 +81,7 @@ class ChatState extends AppState {
   /// For package detail check:-  https://pub.dev/packages/firebase_remote_config#-readme-tab-
   void getFCMServerKey() async {
     final RemoteConfig remoteConfig = await RemoteConfig.instance;
-    await remoteConfig.fetch(expiration: const Duration(hours: 5));
+    await remoteConfig.fetch(expiration: const Duration(days: 5));
     await remoteConfig.activateFetched();
     var data = remoteConfig.getString('FcmServerKey');
     if (data != null && data.isNotEmpty) {

pubspec.lock

@@ -361,6 +361,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.9.3"
+  package_info:
+    dependency: "direct main"
+    description:
+      name: package_info
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.1"
   package_resolver:
     dependency: transitive
     description:
@@ -669,4 +676,4 @@ packages:
     version: "2.2.0"
 sdks:
   dart: ">=2.7.0 <3.0.0"
-  flutter: ">=1.12.13+hotfix.4 <2.0.0"
+  flutter: ">=1.12.13+hotfix.5 <2.0.0"

pubspec.yaml

@@ -31,16 +31,16 @@ dependencies:
   firebase_auth:
   firebase_database:
   firebase_analytics:
-
   cloud_firestore:
   firebase_storage: 
-  image_picker: ^0.6.2
   uuid: ^2.0.0
+  intl: ^0.15.8
   http: 
+  google_sign_in: 
+  image_picker: ^0.6.2
+  package_info: ^0.4.1
   shared_preferences: ^0.5.1+2
   firebase_messaging: ^6.0.13
-  google_sign_in: 
-  intl: ^0.15.8
   url_launcher:
   share: ^0.6.3
   google_fonts: ^0.3.9