Task 4 CMD

task4flutter-registration.dart

import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:modal_progress_hud/modal_progress_hud.dart';

class SignUpUsingEmail extends StatefulWidget {
  @override
  _SignUpUsingEmailState createState() => _SignUpUsingEmailState();
}

class _SignUpUsingEmailState extends State<SignUpUsingEmail> {
  final _formKey = GlobalKey<FormState>();
  FirebaseAuth firebaseAuth = FirebaseAuth.instance;
  TextEditingController emailController = TextEditingController();
  TextEditingController passwordController = TextEditingController();
  bool isLoading = false;

  registerUser({String email, String password}) async {
    try {
      await FirebaseAuth.instance
          .createUserWithEmailAndPassword(email: email, password: password);
      Navigator.pushNamedAndRemoveUntil(context, 'Home', (route) => false);
    } on FirebaseAuthException catch (e) {
      if (e.code == 'weak-password') {
        print('The password provided is too weak.');
        _showDialog('Weak Password');
        setState(() {
          isLoading = false;
        });
      } else if (e.code == 'email-already-in-use') {
        print('The account already exists for that email.');
        _showDialog('Account already exist');
        setState(() {
          isLoading = false;
        });
      }
    } catch (e) {
      print(e.toString());
    }
  }

  void _showDialog(String errorInfo) {
    showDialog(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
            title: Text("Error"),
            content: Text(errorInfo),
            actions: <Widget>[
              FlatButton(
                  onPressed: () {
                    Navigator.of(context).pop();
                  },
                  child: Text("Close"))
            ],
          );
        });
  }

  @override
  Widget build(BuildContext context) {
    return ModalProgressHUD(
      inAsyncCall: isLoading,
      child: Scaffold(
        resizeToAvoidBottomPadding: false,
        appBar: AppBar(
            title: Text("Registration Page"), backgroundColor: Colors.black),
        body: Form(
          key: _formKey,
          child: SingleChildScrollView(
            child: Column(children: <Widget>[
              SizedBox(
                height: 120.0,
              ),
              Text(
                'Registration Page',
                style: TextStyle(fontSize: 44.0, fontWeight: FontWeight.bold),
              ),
              Column(
                children: <Widget>[
                  SizedBox(
                    height: 10,
                  ),
                  Padding(
                    padding: EdgeInsets.fromLTRB(20, 0, 20, 0),
                    child: TextFormField(
                      controller: emailController,
                      decoration: InputDecoration(
                          labelText: 'EMAIL',
                          labelStyle: TextStyle(
                              fontFamily: 'Montserrat',
                              fontWeight: FontWeight.bold,
                              color: Colors.grey),
                          // hintText: 'EMAIL',
                          // hintStyle: ,
                          focusedBorder: UnderlineInputBorder(
                              borderSide: BorderSide(color: Colors.green))),
                      validator: (value) {
                        if (value.isEmpty) {
                          return 'Enter Email id';
                        }
                        return null;
                      },
                    ),
                  ),
                  SizedBox(height: 10.0),
                  Padding(
                    padding: EdgeInsets.fromLTRB(20, 0, 20, 0),
                    child: TextFormField(
                        controller: passwordController,
                        obscureText: true,
                        decoration: InputDecoration(
                            labelText: 'PASSWORD ',
                            labelStyle: TextStyle(
                                fontFamily: 'Montserrat',
                                fontWeight: FontWeight.bold,
                                color: Colors.grey),
                            focusedBorder: UnderlineInputBorder(
                                borderSide: BorderSide(color: Colors.green))),
                        validator: (value) {
                          if (value.isEmpty) {
                            return 'Enter Password';
                          }
                          return null;
                        }),
                  ),
                  SizedBox(height: 50.0),
                  Container(
                      padding: EdgeInsets.fromLTRB(20, 0, 20, 0),
                      height: 40.0,
                      child: Material(
                        borderRadius: BorderRadius.circular(20.0),
                        shadowColor: Colors.greenAccent,
                        color: Colors.green,
                        elevation: 7.0,
                        child: GestureDetector(
                          onTap: () {
                            if (_formKey.currentState.validate()) {
                              registerUser(
                                  email: emailController.text,
                                  password: passwordController.text);
                            }
                            setState(() {
                              isLoading = true;
                            });
                            Future.delayed(const Duration(seconds: 5), () {
                              if (mounted) {
                                setState(() {
                                  isLoading = false;
                                });
                              }
                            });
                          },
                          child: Center(
                            child: Text(
                              'SIGNUP',
                              style: TextStyle(
                                  color: Colors.white,
                                  fontWeight: FontWeight.bold,
                                  fontFamily: 'Montserrat'),
                            ),
                          ),
                        ),
                      )),
                  SizedBox(height: 20.0),
                  Container(
                    padding: EdgeInsets.fromLTRB(20, 0, 20, 0),
                    height: 40.0,
                    color: Colors.transparent,
                    child: Container(
                      decoration: BoxDecoration(
                          border: Border.all(
                              color: Colors.black,
                              style: BorderStyle.solid,
                              width: 1.0),
                          color: Colors.transparent,
                          borderRadius: BorderRadius.circular(20.0)),
                      child: InkWell(
                        onTap: () {
                          Navigator.of(context).pop();
                        },
                        child: Center(
                          child: Text('Go Back',
                              style: TextStyle(
                                  fontWeight: FontWeight.bold,
                                  fontFamily: 'Montserrat')),
                        ),
                      ),
                    ),
                  ),
                ],
              ),
            ]),
          ),
        ),
      ),
    );
  }

  @override
  void dispose() {
    super.dispose();
    emailController.dispose();
    passwordController.dispose();
  }
}