added go_router for deeplinking

lib/main.dart

@@ -1,12 +1,18 @@
 import 'package:crab_ui/contact.dart';
+import 'package:crab_ui/email.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 import 'home_page.dart';
 import 'login.dart';
-
+import 'package:go_router/go_router.dart';
+import 'routingHandler.dart';
 
 void main() {
   WidgetsFlutterBinding.ensureInitialized();
-  runApp(HyM());
+  runApp(ChangeNotifierProvider(
+    create: (context) => AuthService(),
+    child: HyM(),
+  ));
 }
 
 class HyM extends StatelessWidget {
@@ -15,22 +21,56 @@ class HyM extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    final GoRouter _router = GoRouter(
+        // refreshListenable: ,
+        initialLocation: '/',
+        routes: [
+          GoRoute(
+            path: "/",
+            builder: (context, state) => SplashScreen(),
+          ),
+          GoRoute(
+            path: "/login",
+            builder: (context, state) => const LoginPage(),
+          ),
+          GoRoute(
+            path: "/home",
+            builder: (context, state) => HomeScreen(),
+          ),
+          GoRoute(
+            path: "/contacts",
+            builder: (context, state) => ContactsPage(),
+          ),
+          GoRoute(
+              path: "/email/:subject/:target/:viewspecs/:emailID",
+              builder: (context, state) {
+                final subject = state.pathParameters['subject']!;
+                final target = state.pathParameters['target']!;
+                final viewspecs = state.pathParameters['viewspecs']!;
+                final emailId = state.pathParameters['emailID']!;
+                return Routinghandler.fromParameters("main anchor", subject, target, viewspecs, emailId);
+              }),
+        ]);
+    return MaterialApp.router(
       debugShowCheckedModeBanner: false,
       theme: ThemeData(
         colorScheme: ColorScheme.light(),
         useMaterial3: true,
       ),
       title: 'HyM',
+      routerConfig: _router,
       // home: HomeScreen(),
-      initialRoute: "/",
 
-      routes: {
-        "/": (context) => SplashScreen(),
-        "/login": (context) => const LoginPage(),
-        "/home": (context) => HomeScreen(),
-        "/contacts": (context) => ContactsPage(),
-      },
+      // routes: {
+      //   "/": (context) => SplashScreen(),
+      //   "/login": (context) => const LoginPage(),
+      //   "/home": (context) => HomeScreen(),
+      //   "/contacts": (context) => ContactsPage(),
+      //   GoRoute(
+      //     path:
+      //   )
+      //   "/email": (context) => EmailListScreen(),
+      // },
     );
   }
 }

pubspec.yaml

@@ -30,6 +30,7 @@ dependencies:
   html2md: ^1.3.2
   markdown_widget: ^2.3.2+8
   markdown: ^7.3.0
+  go_router: ^16.0.0
 
 dev_dependencies:
   flutter_test: