Flutter ve Firebase ile Kimlik Doğrulama

dependencies:
  firebase_core: latest_version
  firebase_auth: latest_version

flutter pub get

import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

import 'package:firebase_auth/firebase_auth.dart';

Future<User?> registerUsingEmailPassword({
  required String email,
  required String password,
}) async {
  FirebaseAuth auth = FirebaseAuth.instance;
  
  try {
    UserCredential userCredential = await auth.createUserWithEmailAndPassword(
      email: email,
      password: password,
    );
    User? user = userCredential.user;
    
    // E-posta doğrulama göndermek için
    await user?.sendEmailVerification();

    return user;
  } catch (e) {
    print("Hata: $e");
    return null;
  }
}

Future<User?> signInUsingEmailPassword({
  required String email,
  required String password,
}) async {
  FirebaseAuth auth = FirebaseAuth.instance;

  try {
    UserCredential userCredential = await auth.signInWithEmailAndPassword(
      email: email,
      password: password,
    );
    return userCredential.user;
  } catch (e) {
    print("Hata: $e");
    return null;
  }
}

void signOut() async {
  await FirebaseAuth.instance.signOut();
}

FirebaseAuth.instance.authStateChanges().listen((User? user) {
  if (user == null) {
    print("Kullanıcı çıkış yaptı");
  } else {
    print("Kullanıcı giriş yaptı");
  }
});

class Validator {
  static String? validateEmail(String email) {
    if (email.isEmpty) return 'E-posta boş olamaz';
    final RegExp emailRegex = RegExp(r'^[\w-]+@([\w-]+\.)+[\w-]{2,4}$');
    if (!emailRegex.hasMatch(email)) return 'Geçerli bir e-posta girin';
    return null;
  }

  static String? validatePassword(String password) {
    if (password.isEmpty) return 'Şifre boş olamaz';
    if (password.length < 6) return 'Şifre en az 6 karakter olmalıdır';
    return null;
  }
}

FirebaseFirestore.instance.collection('users').doc(user.uid).set({
  'email': user.email,
  'roles': {'admin': false}
});

exports.setCustomAdminClaim = functions.firestore.document('users/{userId}')
  .onWrite(async (change, context) => {
    const newValue = change.after.data();
    const isAdmin = newValue.roles.admin;

    if (isAdmin) {
      await admin.auth().setCustomUserClaims(context.params.userId, { admin: true });
    } else {
      await admin.auth().setCustomUserClaims(context.params.userId, { admin: false });
    }
});

match /somePrivateData/{docId} {
  allow read, write: if request.auth.token.admin == true;
}

await user.sendEmailVerification();