add flutterfire_authenticator (#9)

.vscode/settings.json

@@ -40,6 +40,7 @@
 		".vscode",
 		".vscode-insiders",
 	],
+	"dart.projectSearchDepth": 3,
 	// ONLY GLOBAL: When reaching a Breakpoint, the debug view is automatically displayed.
 	"debug.openDebug": "openOnDebugBreak",
 	// Execute format on save if true.

packages/flutterfire_authenticator/.gitignore

@@ -0,0 +1,30 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+.packages
+build/

packages/flutterfire_authenticator/.metadata

@@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: ffccd96b62ee8cec7740dab303538c5fc26ac543
+  channel: stable
+
+project_type: package

packages/flutterfire_authenticator/CHANGELOG.md

@@ -0,0 +1,3 @@
+## 0.1.0
+
+* initial release.

packages/flutterfire_authenticator/README.md

@@ -0,0 +1,39 @@
+<!--
+This README describes the package. If you publish this package to pub.dev,
+this README's contents appear on the landing page for your package.
+
+For information about how to write a good package README, see the guide for
+[writing package pages](https://dart.dev/guides/libraries/writing-package-pages).
+
+For general information about developing packages, see the Dart guide for
+[creating packages](https://dart.dev/guides/libraries/create-library-packages)
+and the Flutter guide for
+[developing packages and plugins](https://flutter.dev/developing-packages).
+-->
+
+TODO: Put a short description of the package here that helps potential users
+know whether this package might be useful for them.
+
+## Features
+
+TODO: List what your package can do. Maybe include images, gifs, or videos.
+
+## Getting started
+
+TODO: List prerequisites and provide or point to information on how to
+start using the package.
+
+## Usage
+
+TODO: Include short and useful examples for package users. Add longer examples
+to `/example` folder.
+
+```dart
+const like = 'sample';
+```
+
+## Additional information
+
+TODO: Tell users more about the package: where to find more information, how to
+contribute to the package, how to file issues, what response they can expect
+from the package authors, and more.

packages/flutterfire_authenticator/analysis_options.yaml

@@ -0,0 +1 @@
+include: package:altive_lints/altive_lints.yaml

packages/flutterfire_authenticator/lib/authenticator.dart

@@ -0,0 +1,15 @@
+/// flutterfire_authenticator with FlutterFire Authentication.
+library flutterfire_authenticator;
+
+export 'package:firebase_auth/firebase_auth.dart'
+    show
+        AuthCredential,
+        OAuthCredential,
+        OAuthProvider,
+        PhoneAuthProvider,
+        UserCredential;
+
+export 'src/auth_exception.dart';
+export 'src/authenticator.dart';
+export 'src/signing_method.dart';
+export 'src/user_extension.dart';

packages/flutterfire_authenticator/lib/src/apple_authenticator.dart

@@ -0,0 +1,45 @@
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:flutter/foundation.dart';
+
+import '../authenticator.dart';
+import 'authenticatable.dart';
+
+class AppleAuthenticator implements Authenticatable {
+  AppleAuthenticator(this._auth);
+
+  final FirebaseAuth _auth;
+
+  final authProvider = AppleAuthProvider();
+
+  User get _user => _auth.currentUser!;
+
+  /// 既にAppleでサインイン済みなら`true`
+  @override
+  bool get alreadySigned => _auth.currentUser?.hasAppleSigning ?? false;
+
+  @override
+  Future<UserCredential> signIn([AuthCredential? credential]) async {
+    if (kIsWeb) {
+      final userCredential = await _auth.signInWithPopup(authProvider);
+      return userCredential;
+    } else {
+      final userCredential = await _auth.signInWithProvider(authProvider);
+      return userCredential;
+    }
+  }
+
+  @override
+  Future<UserCredential> reauthenticate([AuthCredential? credential]) async {
+    return _auth.currentUser!.reauthenticateWithProvider(authProvider);
+  }
+
+  @override
+  Future<UserCredential> link([AuthCredential? credential]) async {
+    return _user.linkWithProvider(authProvider);
+  }
+
+  @override
+  Future<User> unlink() async {
+    return _user.unlink(SigningMethod.apple.providerId);
+  }
+}

packages/flutterfire_authenticator/lib/src/auth_exception.dart

@@ -0,0 +1,71 @@
+import 'package:firebase_auth/firebase_auth.dart';
+
+/// 認証で発生したエラーを判別するためのエラークラス。
+/// FirebaseAuthExceptionから生成する。
+sealed class AuthException implements Exception {
+  factory AuthException.fromError(FirebaseAuthException e) {
+    return switch (e.code) {
+      // Google認証でキャンセルした場合は「cancel」が返ってくる
+      // Apple認証でキャンセルした場合は「canceled」が返ってくる
+      'cancel' || 'canceled' => const AuthCancelled(),
+      'requires-recent-login' => const AuthRequiresReLogin(),
+      'invalid-phone-number' => const AuthInvalidPhoneNumber(),
+      'credential-already-in-use' => const AuthCredentialAlreadyInUse(),
+      'network-request-failed' => const AuthNetworkError(),
+      // 'email-already-in-use' => const ,
+      // 'provider-already-linked' => const ,
+      // 'too-many-requests' => const ,
+      // 'account-exists-with-different-credential' => const ,
+      // 'invalid-credential' => const ,
+      // 'user-disabled' => const ,
+      _ => const AuthUndefinedError(),
+    };
+  }
+
+  @override
+  String toString() => message;
+
+  String get message;
+}
+
+class AuthCancelled implements AuthException {
+  const AuthCancelled();
+
+  @override
+  String get message => '認証がキャンセルされました';
+}
+
+class AuthRequiresReLogin implements AuthException {
+  const AuthRequiresReLogin();
+
+  @override
+  String get message => '再ログインが必要です';
+}
+
+class AuthInvalidPhoneNumber implements AuthException {
+  const AuthInvalidPhoneNumber();
+
+  @override
+  String get message => '電話番号が不正です';
+}
+
+class AuthCredentialAlreadyInUse implements AuthException {
+  const AuthCredentialAlreadyInUse();
+
+  @override
+  String get message => 'この認証情報はすでに使用されています';
+}
+
+class AuthNetworkError implements AuthException {
+  const AuthNetworkError();
+
+  @override
+  String get message => 'ネットワークエラーが発生しました';
+}
+
+class AuthUndefinedError implements AuthException {
+  const AuthUndefinedError();
+
+  @override
+  String get message => '予期せぬエラーが発生しました';
+}

packages/flutterfire_authenticator/lib/src/authenticatable.dart

@@ -0,0 +1,30 @@
+import 'package:firebase_auth/firebase_auth.dart';
+
+abstract class Authenticatable {
+  /// すでにサインイン済みかどうか。
+  bool get alreadySigned;
+
+  /// サインイン。
+  ///
+  /// 電話番号認証ではサインイン処理が2STEPに分かれており、
+  /// [AuthCredential]を外から渡す必要があるため、
+  /// オプショナル引数として[AuthCredential]を受け取る形にしている。
+  Future<UserCredential> signIn([AuthCredential? credential]);
+
+  /// 再認証する。
+  ///
+  /// 電話番号認証ではサインイン処理が2STEPに分かれており、
+  /// [AuthCredential]を外から渡す必要があるため、
+  /// オプショナル引数として[AuthCredential]を受け取る形にしている。
+  Future<UserCredential> reauthenticate([AuthCredential? credential]);
+
+  /// ユーザーにAppleを紐付ける。
+  ///
+  /// 電話番号認証ではサインイン処理が2STEPに分かれており、
+  /// [AuthCredential]を外から渡す必要があるため、
+  /// オプショナル引数として[AuthCredential]を受け取る形にしている。
+  Future<UserCredential> link([AuthCredential? credential]);
+
+  /// Apple IDをリンク解除。
+  Future<User> unlink();
+}