前言
Hi, 今天要把登入的Repository寫好備用，教學內容只會擷取片段程式碼，建議大家搭配完整程式碼來練習。
完整程式碼
安裝
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| google_sign_in: ^5.0.5
firebase_auth: ^3.0.1
firebase_core: ^1.4.0
|
Google 登入
在登入時會有三個功能，第一個是按按鈕的時候觸發的google登入和第二個登出，第三個則是在開啟app時檢查有沒有登入過，有的話就可以跳過登入畫面，如果還不知道Google登入怎麼設定的可以到Day16 - Google登入教學。
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| abstract class AuthRepositoryImpl {
Future<bool> signInWithGoogle();
Future<void> signOut();
Future<bool> isSignedIn();
}
class AuthRepository implements AuthRepositoryImpl {
final FirebaseAuth _firebaseAuth;
final GoogleSignIn _googleSignIn;
AuthRepository()
: _firebaseAuth = FirebaseAuth.instance,
_googleSignIn = GoogleSignIn();
@override
Future<bool> signInWithGoogle() async {
final GoogleSignInAccount? googleUser = await _googleSignIn.signIn();
if (googleUser == null) {
return false;
}
final GoogleSignInAuthentication googleAuth =
await googleUser.authentication;
final AuthCredential credential = GoogleAuthProvider.credential(
accessToken: googleAuth.accessToken,
idToken: googleAuth.idToken,
);
await _firebaseAuth.signInWithCredential(credential);
return true;
}
@override
Future<void> signOut() async {
Future.wait([
_firebaseAuth.signOut(),
_googleSignIn.signOut(),
]);
}
@override
Future<bool> isSignedIn() async {
try {
final User? currentUser = _firebaseAuth.currentUser;
if (currentUser != null) {
return true;
} else {
return false;
}
} catch (_) {
return false;
}
}
}
|