cpd_job_app/lib/Widgets/bottom_nav_bar.dart

import 'package:cpd_ss23/Search/profile_company.dart';
import 'package:cpd_ss23/Search/search_companies.dart';
import 'package:cpd_ss23/jobs/upload_job.dart';
import 'package:cpd_ss23/user_state.dart';
import 'package:curved_navigation_bar/curved_navigation_bar.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import '../jobs/jobs_screen.dart';

class BottomNavigationBarForApp extends StatelessWidget {

  int indexNum = 0;

  BottomNavigationBarForApp({required this.indexNum});

  void _logout(context) {
    final FirebaseAuth _auth = FirebaseAuth.instance;

    showDialog(
        context: context,
        builder: (context){
          return AlertDialog(
            backgroundColor: Colors.black54,
            title: const Row(
              children: [
                Padding(
                  padding: EdgeInsets.all(8.0),
                  child: Icon(
                    Icons.logout,
                    color: Colors.white,
                    size: 36
                  ),
                ),
                Padding(
                    padding: EdgeInsets.all(8.0),
                  child: Text(
                    "Sign Out",
                    style: TextStyle(color: Colors.white, fontSize: 28),
                ),
                ),
              ],
            ),
          content: const Text(
          "Do you want to Log Out?",
          style: TextStyle(
          color: Colors.white, fontSize: 20
          ),
          ),
            actions: [
              TextButton(
                onPressed: (){
                  Navigator.canPop(context) ? Navigator.pop(context) : null;
                },
                child: const Text("No", style: TextStyle(color: Colors.green, fontSize: 18),),
              ),
              TextButton(
                onPressed: (){
                  _auth.signOut();
                  Navigator.canPop(context) ? Navigator.pop(context) : null;
                  Navigator.pushReplacement(context, MaterialPageRoute(builder: (_) => UserState()));
                },
                child: const Text("Yes", style: TextStyle(color: Colors.green, fontSize: 18),),
              )
            ],
          );
        }
        );
  }

  @override
  Widget build(BuildContext context) {
    return CurvedNavigationBar(
      color: Colors.cyan,
        backgroundColor: Colors.black,
        buttonBackgroundColor: Colors.white,
        height: 50,
        index: indexNum,
        items: const [
          Icon(Icons.list, size: 19, color: Colors.black,),
          Icon(Icons.search, size: 19, color: Colors.black,),
          Icon(Icons.add, size: 19, color: Colors.black,),
          Icon(Icons.person_pin, size: 19, color: Colors.black,),
          Icon(Icons.exit_to_app, size: 19, color: Colors.black,),
        ],
      animationDuration: const Duration(
        milliseconds: 300,
      ),
      animationCurve: Curves.bounceInOut,
      onTap: (index){
          if(index == 0){
            Navigator.pushReplacement(context, MaterialPageRoute(builder: (_) => JobScreen()));
          } else if (index == 1){
            Navigator.pushReplacement(context, MaterialPageRoute(builder: (_) => AllWorkersScreen()));
          } else if (index == 2){
            Navigator.pushReplacement(context, MaterialPageRoute(builder: (_) => UploadJobNow()));
          } else if (index == 3){
            final FirebaseAuth _auth=FirebaseAuth.instance;
            final User? user = _auth.currentUser;
            final String uid = user!.uid;
            Navigator.pushReplacement(context, MaterialPageRoute(builder: (_) => ProfileScreen(userId: uid)));
          }
          else if (index == 4){
            _logout(context);
          }
      },
    );
  }
}