Merge pull request #18 from k5924/HP-76

HP-76: Implemented Update User Profiles

lib/src/providers/auth_provider.dart

@@ -139,4 +139,41 @@ class AuthProvider {
       return exceptionsFactory.exceptionCaught()!;
     }
   }
+
+  Future<String?> changeEmail(String newEmail, String password) async {
+    try {
+      user = _auth.currentUser;
+      final currentEmail = user!.email;
+      final credential = EmailAuthProvider.credential(
+        email: currentEmail!,
+        password: password,
+      );
+      await user!
+          .reauthenticateWithCredential(credential)
+          .then((value) => user!.updateEmail(newEmail));
+      await user!.sendEmailVerification();
+      logout();
+    } on FirebaseAuthException catch (e) {
+      exceptionsFactory = ExceptionsFactory(e.code);
+      return exceptionsFactory.exceptionCaught()!;
+    }
+  }
+
+  Future<String?> changePassword(String oldPassword, String newPassword) async {
+    try {
+      user = _auth.currentUser;
+      final currentEmail = user!.email;
+      final credential = EmailAuthProvider.credential(
+        email: currentEmail!,
+        password: oldPassword,
+      );
+      await user!
+          .reauthenticateWithCredential(credential)
+          .then((value) => user!.updatePassword(newPassword));
+      logout();
+    } on FirebaseAuthException catch (e) {
+      exceptionsFactory = ExceptionsFactory(e.code);
+      return exceptionsFactory.exceptionCaught()!;
+    }
+  }
 }

lib/src/screens/change_email/change_email_screen.dart

@@ -0,0 +1,190 @@
+// ignore_for_file: use_build_context_synchronously
+
+import 'package:flutter/material.dart';
+import 'package:flutter_easyloading/flutter_easyloading.dart';
+import 'package:monerate/src/providers/export.dart';
+import 'package:monerate/src/screens/export.dart';
+import 'package:monerate/src/utilities/export.dart';
+import 'package:monerate/src/widgets/export.dart';
+
+class ChangeEmailScreen extends StatefulWidget {
+  static const kID = 'change_email_screen';
+  const ChangeEmailScreen({Key? key}) : super(key: key);
+
+  @override
+  _ChangeEmailScreenState createState() => _ChangeEmailScreenState();
+}
+
+class _ChangeEmailScreenState extends State<ChangeEmailScreen> {
+  final TextEditingController newEmailController = TextEditingController();
+  final TextEditingController confirmEmailController = TextEditingController();
+  final TextEditingController passwordController = TextEditingController();
+  final _formKey = GlobalKey<FormState>();
+
+  bool _showPassword = false;
+
+  final AuthProvider authProvider = AuthProvider();
+
+  @override
+  void dispose() {
+    // Clean up controllers when form is disposed
+    newEmailController.dispose();
+    confirmEmailController.dispose();
+    passwordController.dispose();
+    super.dispose();
+  }
+
+  void closeDialogBox() {
+    return Navigator.pop(context);
+  }
+
+  Future<String?> _updateEmail() async {
+    return authProvider.changeEmail(
+      confirmEmailController.text,
+      passwordController.text,
+    );
+  }
+
+  Future<String?> displayConfirmationDialog() {
+    return customAlertDialog(
+      context: context,
+      title: "Confirmation Required",
+      content:
+          "By continuing with this action, you will be signed out of the current session. A verification email will be sent to the provided email which must be verified before logging in with your new credentials. Do you wish to continue?",
+      actions: [
+        OutlinedButton(
+          onPressed: () => closeDialogBox(),
+          child: const Text(
+            "Cancel",
+          ),
+        ),
+        ElevatedButton(
+          onPressed: () async {
+            EasyLoading.show(status: 'loading...');
+            final result = await _updateEmail();
+            if (result != null) {
+              closeDialogBox();
+              EasyLoading.showError(result);
+            } else {
+              Navigator.pushReplacementNamed(
+                context,
+                LoginScreen.kID,
+              );
+              EasyLoading.dismiss();
+            }
+          },
+          child: const Text("Update Email"),
+        ),
+      ],
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text(
+          "Change Email Address",
+        ),
+        centerTitle: true,
+      ),
+      body: Center(
+        child: SingleChildScrollView(
+          child: Padding(
+            padding: const EdgeInsets.all(25.0),
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                Form(
+                  key: _formKey,
+                  child: Column(
+                    children: [
+                      TextFormField(
+                        controller: newEmailController,
+                        keyboardType: TextInputType.emailAddress,
+                        validator: EmailValidator().validateEmail,
+                        onSaved: (value) {
+                          newEmailController.text = value!;
+                        },
+                        decoration: const InputDecoration(
+                          hintText: 'New Email Address',
+                        ),
+                      ),
+                      const SizedBox(
+                        height: 20,
+                      ),
+                      TextFormField(
+                        controller: confirmEmailController,
+                        keyboardType: TextInputType.emailAddress,
+                        validator: (value) {
+                          return EmailValidator().confirmEmail(
+                            newEmailController.text,
+                            confirmEmailController.text,
+                          );
+                        },
+                        onSaved: (value) {
+                          confirmEmailController.text = value!;
+                        },
+                        decoration: const InputDecoration(
+                          hintText: 'Confirm New Email Address',
+                        ),
+                      ),
+                      const SizedBox(
+                        height: 20,
+                      ),
+                      TextFormField(
+                        controller: passwordController,
+                        validator: PasswordValidator().validatePassword,
+                        obscureText: !_showPassword,
+                        textInputAction: TextInputAction.done,
+                        onSaved: (password) {
+                          passwordController.text = password!;
+                        },
+                        decoration: InputDecoration(
+                          hintText: 'Password',
+                          suffixIcon: GestureDetector(
+                            onTap: () => setState(() {
+                              _showPassword = !_showPassword;
+                            }),
+                            child: Icon(
+                              _showPassword
+                                  ? Icons.visibility
+                                  : Icons.visibility_off,
+                            ),
+                          ),
+                        ),
+                      ),
+                      const SizedBox(
+                        height: 20,
+                      ),
+                      ElevatedButton(
+                        onPressed: () async {
+                          if (_formKey.currentState!.validate()) {
+                            FocusScope.of(context).unfocus();
+                            await displayConfirmationDialog();
+                          }
+                        },
+                        style: ElevatedButton.styleFrom(
+                          padding: const EdgeInsets.symmetric(
+                            horizontal: 40,
+                            vertical: 10,
+                          ),
+                        ),
+                        child: const Text(
+                          "Submit",
+                          style: TextStyle(
+                            fontSize: 24,
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/src/screens/change_email/export.dart

@@ -0,0 +1 @@
+export 'change_email_screen.dart';