Flutter Firebase Entegrasyonu: Tam Rehber

1# FlutterFire CLI yukle
2dart pub global activate flutterfire_cli
3 
4# Firebase projesini baglat
5flutterfire configure --project=my-flutter-app
6 
7# Gerekli paketleri ekle
8flutter pub add firebase_core
9flutter pub add firebase_auth
10flutter pub add cloud_firestore
11flutter pub add firebase_storage
12flutter pub add firebase_analytics
13flutter pub add firebase_crashlytics

1// main.dart - Firebase baslatma
2import 'package:firebase_core/firebase_core.dart';
3import 'package:firebase_crashlytics/firebase_crashlytics.dart';
4import 'package:flutter/foundation.dart';
5import 'package:flutter/material.dart';
6import 'firebase_options.dart';
7 
8Future main() async {
9  WidgetsFlutterBinding.ensureInitialized();
10 
11  await Firebase.initializeApp(
12    options: DefaultFirebaseOptions.currentPlatform,
13  );
14 
15  // Crashlytics: yakalanmamis hatalari otomatik raporla
16  FlutterError.onError = FirebaseCrashlytics.instance.recordFlutterFatalError;
17  PlatformDispatcher.instance.onError = (error, stack) {
18    FirebaseCrashlytics.instance.recordError(error, stack, fatal: true);
19    return true;
20  };
21 
22  runApp(const MyApp());
23}

1import 'package:firebase_auth/firebase_auth.dart';
2 
3class AuthService {
4  final FirebaseAuth _auth = FirebaseAuth.instance;
5 
6  // Mevcut kullanici stream'i
7  Stream get authStateChanges => _auth.authStateChanges();
8 
9  // Email ile kayit
10  Future signUp({
11    required String email,
12    required String password,
13  }) async {
14    try {
15      final credential = await _auth.createUserWithEmailAndPassword(
16        email: email,
17        password: password,
18      );
19      // Profil guncelle
20      await credential.user?.updateDisplayName(email.split('@').first);
21      return credential;
22    } on FirebaseAuthException catch (e) {
23      throw _handleAuthError(e);
24    }
25  }
26 
27  // Email ile giris
28  Future signIn({
29    required String email,
30    required String password,
31  }) async {
32    try {
33      return await _auth.signInWithEmailAndPassword(
34        email: email,
35        password: password,
36      );
37    } on FirebaseAuthException catch (e) {
38      throw _handleAuthError(e);
39    }
40  }
41 
42  // Google ile giris
43  Future signInWithGoogle() async {
44    final GoogleSignInAccount? googleUser = await GoogleSignIn().signIn();
45    if (googleUser == null) throw Exception('Google sign-in iptal edildi');
46 
47    final GoogleSignInAuthentication googleAuth =
48        await googleUser.authentication;
49 
50    final credential = GoogleAuthProvider.credential(
51      accessToken: googleAuth.accessToken,
52      idToken: googleAuth.idToken,
53    );
54 
55    return _auth.signInWithCredential(credential);
56  }
57 
58  // Cikis yap
59  Future signOut() async {
60    await _auth.signOut();
61  }
62 
63  // Hata yonetimi
64  String _handleAuthError(FirebaseAuthException e) {
65    switch (e.code) {
66      case 'email-already-in-use':
67        return 'Bu email zaten kayitli';
68      case 'invalid-email':
69        return 'Gecersiz email adresi';
70      case 'weak-password':
71        return 'Sifre cok zayif (en az 6 karakter)';
72      case 'user-not-found':
73        return 'Kullanici bulunamadi';
74      case 'wrong-password':
75        return 'Hatali sifre';
76      default:
77        return 'Bir hata olustu: ${e.message}';
78    }
79  }
80}

1import 'package:cloud_firestore/cloud_firestore.dart';
2 
3class ProductRepository {
4  final FirebaseFirestore _firestore = FirebaseFirestore.instance;
5  late final CollectionReference> _collection;
6 
7  ProductRepository() {
8    _collection = _firestore.collection('products');
9  }
10 
11  // Urun ekle
12  Future addProduct(Product product) async {
13    final doc = await _collection.add(product.toMap());
14    return doc.id;
15  }
16 
17  // Urun guncelle
18  Future updateProduct(String id, Map data) async {
19    await _collection.doc(id).update(data);
20  }
21 
22  // Urun sil
23  Future deleteProduct(String id) async {
24    await _collection.doc(id).delete();
25  }
26 
27  // Tekil urun getir
28  Future getProduct(String id) async {
29    final doc = await _collection.doc(id).get();
30    if (!doc.exists) return null;
31    return Product.fromMap(doc.data()!, doc.id);
32  }
33 
34  // Gercek zamanli liste dinle
35  Stream> watchProducts({
36    String? category,
37    int limit = 20,
38  }) {
39    Query> query = _collection;
40 
41    if (category != null) {
42      query = query.where('category', isEqualTo: category);
43    }
44 
45    return query
46        .orderBy('createdAt', descending: true)
47        .limit(limit)
48        .snapshots()
49        .map((snapshot) {
50      return snapshot.docs
51          .map((doc) => Product.fromMap(doc.data(), doc.id))
52          .toList();
53    });
54  }
55 
56  // Sayfalama ile listeleme
57  Future> getProductsPaginated({
58    DocumentSnapshot? lastDocument,
59    int pageSize = 10,
60  }) async {
61    Query> query = _collection
62        .orderBy('createdAt', descending: true)
63        .limit(pageSize);
64 
65    if (lastDocument != null) {
66      query = query.startAfterDocument(lastDocument);
67    }
68 
69    final snapshot = await query.get();
70    return snapshot.docs
71        .map((doc) => Product.fromMap(doc.data(), doc.id))
72        .toList();
73  }
74 
75  // Toplu islem (batch write)
76  Future batchUpdatePrices(Map priceUpdates) async {
77    final batch = _firestore.batch();
78 
79    for (final entry in priceUpdates.entries) {
80      batch.update(
81        _collection.doc(entry.key),
82        {'price': entry.value, 'updatedAt': FieldValue.serverTimestamp()},
83      );
84    }
85 
86    await batch.commit();
87  }
88}

1import 'package:firebase_storage/firebase_storage.dart';
2import 'dart:io';
3 
4class StorageService {
5  final FirebaseStorage _storage = FirebaseStorage.instance;
6 
7  // Dosya yukle (progress ile)
8  Future uploadFile({
9    required File file,
10    required String path,
11    void Function(double)? onProgress,
12  }) async {
13    final ref = _storage.ref(path);
14    final uploadTask = ref.putFile(file);
15 
16    uploadTask.snapshotEvents.listen((event) {
17      final progress = event.bytesTransferred / event.totalBytes;
18      onProgress?.call(progress);
19    });
20 
21    await uploadTask;
22    return ref.getDownloadURL();
23  }
24 
25  // Resim yukle (boyut sinirlamasi ile)
26  Future uploadImage({
27    required File imageFile,
28    required String userId,
29    int maxSizeBytes = 5 * 1024 * 1024, // 5MB
30  }) async {
31    final fileSize = await imageFile.length();
32    if (fileSize > maxSizeBytes) {
33      throw Exception('Dosya boyutu cok buyuk (maks 5MB)');
34    }
35 
36    final fileName = DateTime.now().millisecondsSinceEpoch.toString();
37    final path = 'users/$userId/images/$fileName.jpg';
38 
39    return uploadFile(file: imageFile, path: path);
40  }
41 
42  // Dosya sil
43  Future deleteFile(String path) async {
44    await _storage.ref(path).delete();
45  }
46}

1import 'package:cloud_functions/cloud_functions.dart';
2 
3class FunctionsService {
4  final FirebaseFunctions _functions = FirebaseFunctions.instance;
5 
6  // Callable function cagir
7  Future> callFunction(
8    String name,
9    Map data,
10  ) async {
11    try {
12      final result = await _functions.httpsCallable(name).call(data);
13      return Map.from(result.data as Map);
14    } on FirebaseFunctionsException catch (e) {
15      throw Exception('Cloud Function hatasi: ${e.message}');
16    }
17  }
18 
19  // Ornek: Odeme islemi baslat
20  Future createPaymentIntent(double amount, String currency) async {
21    final result = await callFunction('createPaymentIntent', {
22      'amount': (amount * 100).toInt(),
23      'currency': currency,
24    });
25    return result['clientSecret'] as String;
26  }
27}

1import 'package:firebase_analytics/firebase_analytics.dart';
2 
3class AnalyticsService {
4  final FirebaseAnalytics _analytics = FirebaseAnalytics.instance;
5 
6  // Sayfa goruntulenme
7  Future logScreenView(String screenName) async {
8    await _analytics.logScreenView(screenName: screenName);
9  }
10 
11  // Ozel event
12  Future logEvent(String name, Map params) async {
13    await _analytics.logEvent(name: name, parameters: params);
14  }
15 
16  // Satin alma
17  Future logPurchase(double value, String currency) async {
18    await _analytics.logPurchase(value: value, currency: currency);
19  }
20 
21  // Kullanici ozelligi
22  Future setUserProperty(String name, String value) async {
23    await _analytics.setUserProperty(name: name, value: value);
24  }
25}

1import 'package:firebase_crashlytics/firebase_crashlytics.dart';
2 
3class CrashlyticsService {
4  final FirebaseCrashlytics _crashlytics = FirebaseCrashlytics.instance;
5 
6  // Kullanici bilgisi ekle
7  Future setUser(String userId) async {
8    await _crashlytics.setUserIdentifier(userId);
9  }
10 
11  // Non-fatal hata raporla
12  Future reportError(dynamic error, StackTrace stack) async {
13    await _crashlytics.recordError(error, stack);
14  }
15 
16  // Ozel anahtar ekle
17  Future setCustomKey(String key, String value) async {
18    await _crashlytics.setCustomKey(key, value);
19  }
20 
21  // Log mesaji ekle (crash raporunda gorunur)
22  Future log(String message) async {
23    await _crashlytics.log(message);
24  }
25}

1import 'package:firebase_remote_config/firebase_remote_config.dart';
2 
3class RemoteConfigService {
4  final FirebaseRemoteConfig _config = FirebaseRemoteConfig.instance;
5 
6  Future initialize() async {
7    await _config.setConfigSettings(RemoteConfigSettings(
8      fetchTimeout: const Duration(minutes: 1),
9      minimumFetchInterval: const Duration(hours: 1),
10    ));
11 
12    await _config.setDefaults({
13      'feature_new_ui': false,
14      'max_upload_size_mb': 5,
15      'maintenance_mode': false,
16      'welcome_message': 'Hosgeldiniz!',
17    });
18 
19    await _config.fetchAndActivate();
20  }
21 
22  bool getBool(String key) => _config.getBool(key);
23  int getInt(String key) => _config.getInt(key);
24  String getString(String key) => _config.getString(key);
25}