Added google signin(#27)

lib/services/google_auth.dart

@@ -0,0 +1,32 @@
+import 'package:firebase_core/firebase_core.dart';
+import 'package:google_sign_in/google_sign_in.dart';
+import 'package:firebase_auth/firebase_auth.dart';
+
+final FirebaseAuth _auth = FirebaseAuth.instance;
+final GoogleSignIn googleSignIn = GoogleSignIn();
+
+
+Future<String> signInWithGoogle() async {
+  await Firebase.initializeApp();
+
+  final GoogleSignInAccount googleSignInAccount = await googleSignIn.signIn();
+  final GoogleSignInAuthentication googleSignInAuthentication = await googleSignInAccount.authentication;
+
+  final AuthCredential credential = GoogleAuthProvider.credential(
+    accessToken: googleSignInAuthentication.accessToken,
+    idToken: googleSignInAuthentication.idToken,
+  );
+
+  final UserCredential authResult = await _auth.signInWithCredential(credential);
+  final User user = authResult.user;
+  assert(!user.isAnonymous);
+
+  final User currentUser = _auth.currentUser;
+  assert(user.uid == currentUser.uid);
+
+  return '$user';
+}
+
+Future<void> signOutGoogle() async {
+  await googleSignIn.signOut();
+}

lib/views/drawer.dart

@@ -1,8 +1,10 @@
 import 'package:flutter/material.dart';
+import 'package:retro_shopping/services/google_auth.dart';
 import 'package:retro_shopping/views/orders.dart';
 //import 'package:retro_shopping/views/profile.dart';
 import '../widgets/drawer_item.dart';
-import 'wishlist.dart';
+import 'Wishlist.dart';
+import 'package:retro_shopping/views/login.dart';
 
 class DrawerWidget extends StatelessWidget {
   const DrawerWidget({
@@ -49,7 +51,15 @@ class DrawerWidget extends StatelessWidget {
           DrawerItem(
             icon: Icons.logout,
             title: 'LOG OUT',
-            onTap: () {},
+            onTap: () {
+              signOutGoogle().then(
+                    (res) {
+                  Navigator.pushReplacement(
+                      context,
+                      MaterialPageRoute(builder: (BuildContext context) => LoginScreen()),);
+                },
+              );
+            },
           ),
         ],
       ),

lib/views/login.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:retro_shopping/helpers/constants.dart';
 import 'package:retro_shopping/widgets/retro_button.dart';
 import 'package:retro_shopping/dashboard.dart';
+import 'package:retro_shopping/services/google_auth.dart';
 
 class LoginScreen extends StatefulWidget{
   @override
@@ -195,6 +196,19 @@ class LoginScreenState extends State<LoginScreen>{
                           InkWell(
                             onTap: (){
                               debugPrint('Navigate to google!');
+                              signInWithGoogle().then(
+                                    (result) {
+                                  if (result != null) {
+                                    Navigator.of(context).pushReplacement(
+                                      MaterialPageRoute(
+                                        builder: (context) {
+                                          return Dashboard();
+                                        },
+                                      ),
+                                    );
+                                  };
+                                },
+                              );
                             },
                             // ignore: sized_box_for_whitespace
                             child: Container(

pubspec.yaml

@@ -29,15 +29,17 @@ dependencies:
   adobe_xd: ^1.1.0+1
   cupertino_icons: ^0.1.3
   fluttertoast: ^7.1.8
-  firebase_core: ^1.0.0
+  firebase_core:
   google_fonts: ^1.1.0
   razorpay_flutter: 1.1.0
   google_mobile_ads: ^0.11.0+3
   geolocator: 5.3.2+2
   geocoder: 0.2.1
   flutter_svg: ^0.20.0-nullsafety.3
-  provider: ^5.0.0
-  advance_pdf_viewer: ^1.2.2
+  provider:
+  advance_pdf_viewer:
+  firebase_auth:
+  google_sign_in:
 
 dev_dependencies:
   flutter_test: