statetless user state seite, jobs page

lib/jobs/jobs_screen.dart

@@ -0,0 +1,65 @@
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:flutter/material.dart';
+
+import '../services/global_variables.dart';
+import '../user_state.dart';
+
+class JobScreen extends StatefulWidget {
+  @override
+  State<JobScreen> createState() => _JobScreenState();
+}
+
+final _auth = FirebaseAuth.instance;
+
+class _JobScreenState extends State<JobScreen> {
+  @override
+  Widget build(BuildContext context) {
+    Size size = MediaQuery.of(context).size;
+
+    return Scaffold(
+      body: Stack(
+        children: [
+          Image.network(
+            signupUrlImage,
+            fit: BoxFit.cover,
+            width: double.infinity,
+            height: double.infinity,
+          ),
+          SingleChildScrollView(
+            child: SizedBox(
+              height: size.height - 18, // Adjust for bottom overflow
+              child: Column(
+                children: [
+                  AppBar(
+                    backgroundColor: Colors.cyan,
+                    title: const Text('Job Screen'),
+                    actions: [
+                      IconButton(
+                        icon: Icon(Icons.search),
+                        onPressed: () {
+                          // Action when the search icon is clicked
+                        },
+                      ),
+                    ],
+                  ),
+                  const SizedBox(height: 80),
+                  ElevatedButton(
+                    onPressed: () {
+                      _auth.signOut();
+                      Navigator.canPop(context) ? Navigator.pop(context) : null;
+                      Navigator.pushReplacement(
+                        context,
+                        MaterialPageRoute(builder: (_) => UserState()),
+                      );
+                    },
+                    child: const Text("Log Out"),
+                  ),
+                ],
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/main.dart

@@ -1,5 +1,6 @@
 import 'package:cpd_ss23/login_page/login_screen.dart';
 import 'package:cpd_ss23/test.dart';
+import 'package:cpd_ss23/user_state.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'package:cpd_ss23/firebase_options.dart'; // Importieren Sie die Firebase-Optionen
 
@@ -82,7 +83,7 @@ class MyApp extends StatelessWidget {
             scaffoldBackgroundColor: Colors.grey,
             primarySwatch: Colors.blue,
           ),
-          home: Login(),
+          home: UserState(),
         );
       },
     );

lib/user_state.dart

@@ -0,0 +1,44 @@
+import 'package:cpd_ss23/jobs/jobs_screen.dart';
+import 'package:cpd_ss23/services/global_methods.dart';
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:flutter/material.dart';
+
+import 'login_page/login_screen.dart';
+
+class UserState extends StatelessWidget {//  enthält keine internen Variablen, die sich während der Laufzeit ändern können.
+
+
+  @override
+  Widget build(BuildContext context) {
+    return StreamBuilder(
+      stream:FirebaseAuth.instance.authStateChanges(),builder: (context, userSnapshot){
+        if(userSnapshot.data == null){
+          print('user isnt logged in yet');
+          return Login();
+        }
+        else if(userSnapshot.hasData){
+          print('user is already logged in ');
+          return JobScreen();
+        }
+        else if(userSnapshot.hasError){
+          return const Scaffold(
+            body: Center(
+              child:Text("An Error ossured"),
+            )
+          );
+        }
+        else if(userSnapshot.connectionState == ConnectionState.waiting){
+          return const Scaffold(
+              body: Center(
+                child:CircularProgressIndicator(),
+              )
+          );
+        }
+        return const Scaffold(body:Center(
+          child:Text( "Smt went wrong"),
+        ));
+    },
+
+    );
+  }
+}