Added app updater for Android

android/app/src/main/AndroidManifest.xml

@@ -38,6 +38,16 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+
+       <provider
+           android:name="sk.fourq.otaupdate.OtaUpdateFileProvider"
+           android:authorities="${applicationId}.ota_update_provider"
+           android:exported="false"
+           android:grantUriPermissions="true">
+           <meta-data
+               android:name="android.support.FILE_PROVIDER_PATHS"
+               android:resource="@xml/filepaths" />
+       </provider>
     </application>
     <uses-permission android:name="android.permission.VIBRATE"/>
     <uses-permission android:name="android.permission.INTERNET" />

android/app/src/main/res/xml/filepaths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-path name="external_download" path="Download"/>
+</paths>

assets/translations/de.json

@@ -167,5 +167,14 @@
   "Color validation without guarantee": "Farbliche Validierung ohne Gewähr",
 
   "Outdated app version": "Veraltete App-Version",
-  "Your app version is outdated, so certificate checking and color validation have been disabled. To re-enable these features, you need to update the app.": "Deine App-Version ist veraltet, daher wurde das Prüfen von Pässen und die Farbvalidierung deaktiviert. Um diese Funktionen wieder zu aktivieren, musst du die App aktualisieren."
+  "Your app version is outdated, so certificate checking and color validation have been disabled. To re-enable these features, you need to update the app.": "Deine App-Version ist veraltet, daher wurde das Prüfen von Pässen und die Farbvalidierung deaktiviert. Um diese Funktionen wieder zu aktivieren, musst du die App aktualisieren.",
+
+  "Update available": "Update verfügbar",
+  "A new version of the app is available. Would you like to update now?": "Eine neue Version der App ist verfügbar. Möchtest du jetzt aktualisieren?",
+  "New version: {} (Last update: {})": "Neue Version: {} (Stand: {})",
+  "Visit our website if you want to update manually": "Besuche unsere Webseite, wenn du manuell aktualisieren möchtest",
+  "Not now": "Nicht jetzt",
+  "Download update": "Update herunterladen",
+  "Downloading...": "Lade herunter...",
+  "An error occurred while downloading the update. Please try again later.": "Beim Herunterladen des Updates ist ein Fehler aufgetreten. Bitte versuche es später erneut."
 }

assets/translations/en.json

@@ -167,5 +167,14 @@
   "Color validation without guarantee": "Color validation without guarantee",
 
   "Outdated app version": "Outdated app version",
-  "Your app version is outdated, so certificate checking and color validation have been disabled. To re-enable these features, you need to update the app.": "Your app version is outdated, so certificate checking and color validation have been disabled. To re-enable these features, you need to update the app."
+  "Your app version is outdated, so certificate checking and color validation have been disabled. To re-enable these features, you need to update the app.": "Your app version is outdated, so certificate checking and color validation have been disabled. To re-enable these features, you need to update the app.",
+
+  "Update available": "Update available",
+  "A new version of the app is available. Would you like to update now?": "A new version of the app is available. Would you like to update now?",
+  "New version: {} (Last update: {})": "New version: {} (Last update: {})",
+  "Visit our website if you want to update manually": "Visit our website if you want to update manually",
+  "Not now": "Not now",
+  "Download update": "Download update",
+  "Downloading...": "Downloading...",
+  "An error occurred while downloading the update. Please try again later.": "An error occurred while downloading the update. Please try again later."
 }

lib/consts/configuration.dart

@@ -0,0 +1,3 @@
+class Configuration {
+  static const bool enable_android_updater = true;
+}

lib/main.dart

@@ -1,9 +1,13 @@
+import 'dart:io';
+
 import 'package:country_codes/country_codes.dart';
 import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_statusbarcolor_ns/flutter_statusbarcolor_ns.dart';
 import 'package:flutter_vector_icons/flutter_vector_icons.dart';
+import 'package:greenpass_app/consts/configuration.dart';
 import 'package:greenpass_app/elements/platform_alert_dialog.dart';
 import 'package:greenpass_app/services/detect_country.dart';
 import 'package:greenpass_app/consts/colors.dart';
@@ -15,16 +19,19 @@ import 'package:greenpass_app/services/my_certs/my_certs.dart';
 import 'package:greenpass_app/services/outdated_check.dart';
 import 'package:greenpass_app/services/pub_certs/pub_certs.dart';
 import 'package:greenpass_app/services/settings.dart';
+import 'package:greenpass_app/services/update_check/update_check.dart';
 import 'package:greenpass_app/views/country_selection_page.dart';
 import 'package:greenpass_app/views/settings_page.dart';
 import 'package:greenpass_app/views/my_passes_page.dart';
 import 'package:greenpass_app/views/scan_others_pass.dart';
+import 'package:greenpass_app/views/update_notification.dart';
 import 'package:hive_flutter/hive_flutter.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await Hive.initFlutter();
   await OutdatedCheck.initAppStart();
+  if (Platform.isAndroid && kReleaseMode && Configuration.enable_android_updater) await UpdateCheck.initAppStart();
   await CountryCodes.init();
   await PubCerts.initAppStart();
   await RegulationsProvider.initAppStart();
@@ -110,6 +117,14 @@ class _HomePageState extends State<MyHomePage> with SingleTickerProviderStateMix
           )
       );
     }
+
+    if (UpdateCheck.updateAvailable) {
+      Future.delayed(Duration.zero, () =>
+          Navigator.push(context, MaterialPageRoute(
+            builder: (context) => UpdateNotification()
+          ))
+      );
+    }
   }
 
   @override
@@ -120,6 +135,7 @@ class _HomePageState extends State<MyHomePage> with SingleTickerProviderStateMix
     ];
 
     FlutterStatusbarcolor.setStatusBarColor(Colors.transparent);
+    FlutterStatusbarcolor.setStatusBarWhiteForeground(_currentPageIdx != 0);
     FlutterStatusbarcolor.setNavigationBarWhiteForeground(Theme.of(context).brightness == Brightness.dark);
     FlutterStatusbarcolor.setNavigationBarColor(Theme.of(context).scaffoldBackgroundColor);
 

lib/services/update_check/android_update_check_result.dart

@@ -0,0 +1,19 @@
+class AndroidUpdateCheckResult {
+  String installedVersion;
+  String newestVersion;
+  DateTime updatedAt;
+  String downloadUrl;
+  String sha256Checksum;
+  Map<String, dynamic>? changelog;
+
+  AndroidUpdateCheckResult({
+    required this.installedVersion,
+    required this.newestVersion,
+    required this.updatedAt,
+    required this.downloadUrl,
+    required this.sha256Checksum,
+    this.changelog,
+  });
+
+  get updateAvailable => this.installedVersion != this.newestVersion;
+}

lib/services/update_check/update_check.dart

@@ -0,0 +1,35 @@
+import 'dart:convert';
+import 'package:greenpass_app/services/update_check/android_update_check_result.dart';
+import 'package:http/http.dart';
+import 'package:package_info/package_info.dart';
+
+class UpdateCheck {
+  static const String _currentVersionUrl = 'https://raw.githubusercontent.com/GreenPassApp/shared-data/main/current-app-version.json';
+
+  static AndroidUpdateCheckResult? androidUpdateCheckResult;
+  static bool updateAvailable = androidUpdateCheckResult?.updateAvailable ?? false;
+
+  static Future<void> initAppStart() async {
+    try {
+      Response res = await get(Uri.parse(_currentVersionUrl));
+      Map<String, dynamic> parsedJson = jsonDecode(res.body);
+      Map<String, dynamic> androidVerInfo = parsedJson['android'];
+
+      androidUpdateCheckResult = AndroidUpdateCheckResult(
+        installedVersion: await _getVersionCode(),
+        newestVersion: androidVerInfo['version'],
+        updatedAt: DateTime.parse(androidVerInfo['updated_at']),
+        downloadUrl: androidVerInfo['download']['url'],
+        sha256Checksum: androidVerInfo['download']['sha256'],
+        changelog: androidVerInfo.containsKey('changelog') ? androidVerInfo['changelog'] : null,
+      );
+    } catch (_) {
+      return null;
+    }
+  }
+
+  static Future<String> _getVersionCode() async {
+    PackageInfo packageInfo = await PackageInfo.fromPlatform();
+    return packageInfo.version;
+  }
+}