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1// Copyright 2019 The Flutter Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5import 'dart:async';
6
7import 'package:flutter/material.dart';
8import 'package:google_sign_in/google_sign_in.dart';
9
10import 'package:extension_google_sign_in_as_googleapis_auth/extension_google_sign_in_as_googleapis_auth.dart';
11import 'package:googleapis/people/v1.dart';
12import 'package:googleapis/admob/v1.dart';
13import 'package:googleapis/youtube/v3.dart';
14
15final GoogleSignIn _googleSignIn = GoogleSignIn(
16  scopes: <String>[PeopleServiceApi.contactsReadonlyScope, YouTubeApi.youtubeReadonlyScope, AdMobApi.admobReadonlyScope, AdMobApi.admobReportScope],
17);
18
19void main() {
20  runApp(
21    const MaterialApp(
22      title: 'Google Sign In',
23      home: SignInDemo(),
24    ),
25  );
26}
27
28/// The main widget of this demo.
29class SignInDemo extends StatefulWidget {
30  /// Creates the main widget of this demo.
31  const SignInDemo({Key? key}) : super(key: key);
32
33  @override
34  State createState() => SignInDemoState();
35}
36
37/// The state of the main widget.
38class SignInDemoState extends State<SignInDemo> {
39  GoogleSignInAccount? _currentUser;
40  String? _contactText;
41
42  @override
43  void initState() {
44    super.initState();
45    print(AdMobApi.admobReadonlyScope);
46    print(AdMobApi.admobReportScope);
47    _googleSignIn.onCurrentUserChanged.listen((GoogleSignInAccount? account) {
48      setState(() {
49        _currentUser = account;
50      });
51      if (_currentUser != null) {
52        _handleGetContact();
53      }
54    });
55    _googleSignIn.signInSilently();
56  }
57
58  Future<void> _handleGetContact() async {
59    setState(() {
60      _contactText = 'Loading contact info...';
61    });
62    // TEST USAGE OF PEOPLE API - WORKS
63    final PeopleServiceApi peopleApi = PeopleServiceApi((await _googleSignIn.authenticatedClient())!);
64    final ListConnectionsResponse response = await peopleApi.people.connections.list(
65      'people/me',
66      personFields: 'names',
67    );
68    // TEST USAGE OF YOUTUBE API - WORKS
69    final YouTubeApi youTubeApi = YouTubeApi((await _googleSignIn.authenticatedClient())!);
70    print(await youTubeApi.playlistItems.list(
71      ['snippet'],
72      playlistId: 'LL', // Liked List
73    ));
74    // TEST USAGE OF ADMOB API - DOES NOT WORK, why?
75    final AdMobApi admobApi = AdMobApi((await _googleSignIn.authenticatedClient())!);
76    print(await admobApi.accounts.list(pageSize: 1));
77
78    final String? firstNamedContactName = _pickFirstNamedContact(response.connections);
79
80    setState(() {
81      if (firstNamedContactName != null) {
82        _contactText = 'I see you know $firstNamedContactName!';
83      } else {
84        _contactText = 'No contacts to display.';
85      }
86    });
87  }
88
89  String? _pickFirstNamedContact(List<Person>? connections) {
90    return connections
91        ?.firstWhere(
92          (Person person) => person.names != null,
93        )
94        .names
95        ?.firstWhere(
96          (Name name) => name.displayName != null,
97        )
98        .displayName;
99  }
100
101  Future<void> _handleSignIn() async {
102    try {
103      await _googleSignIn.signIn();
104    } catch (error) {
105      print(error);
106    }
107  }
108
109  Future<void> _handleSignOut() => _googleSignIn.disconnect();
110
111  Widget _buildBody() {
112    if (_currentUser != null) {
113      return Column(
114        mainAxisAlignment: MainAxisAlignment.spaceAround,
115        children: <Widget>[
116          ListTile(
117            leading: GoogleUserCircleAvatar(
118              identity: _currentUser!,
119            ),
120            title: Text(_currentUser!.displayName ?? ''),
121            subtitle: Text(_currentUser!.email),
122          ),
123          const Text('Signed in successfully.'),
124          Text(_contactText ?? ''),
125          ElevatedButton(
126            child: const Text('SIGN OUT'),
127            onPressed: _handleSignOut,
128          ),
129          ElevatedButton(
130            child: const Text('REFRESH'),
131            onPressed: _handleGetContact,
132          ),
133        ],
134      );
135    } else {
136      return Column(
137        mainAxisAlignment: MainAxisAlignment.spaceAround,
138        children: <Widget>[
139          const Text('You are not currently signed in.'),
140          ElevatedButton(
141            child: const Text('SIGN IN'),
142            onPressed: _handleSignIn,
143          ),
144        ],
145      );
146    }
147  }
148
149  @override
150  Widget build(BuildContext context) {
151    return Scaffold(
152        appBar: AppBar(
153          title: const Text('Google Sign In'),
154        ),
155        body: ConstrainedBox(
156          constraints: const BoxConstraints.expand(),
157          child: _buildBody(),
158        ));
159  }
160}