From d9ee788bbe7d786e3450ca8b1cee3e1b5b84d1f9 Mon Sep 17 00:00:00 2001
From: Marin Basic <marin.basic02@gmail.com>
Date: Tue, 16 Feb 2021 16:32:49 +0100
Subject: [PATCH] PIN Lock added

---
 lib/views/home.dart     | 37 +++++++++++++++++++++++++++++++++++++
 lib/views/settings.dart | 36 ++++++++++++++++++++++++++++++++++++
 pubspec.lock            | 14 ++++++++++++++
 pubspec.yaml            |  4 +++-
 4 files changed, 90 insertions(+), 1 deletion(-)

diff --git a/lib/views/home.dart b/lib/views/home.dart
index 8408399..a911833 100644
--- a/lib/views/home.dart
+++ b/lib/views/home.dart
@@ -1,7 +1,10 @@
 import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:yapgp/models/config.dart';
 import 'package:yapgp/views/decrypt.dart';
 import 'package:yapgp/views/settings.dart';
+import 'package:flutter_screen_lock/lock_screen.dart';
+import 'package:local_auth/local_auth.dart';
 
 import 'contacts.dart';
 import 'keys.dart';
@@ -13,9 +16,43 @@ class Home extends StatefulWidget {
 }
 
 class HomeState extends State<Home> {
+  Future<SharedPreferences> _prefs = SharedPreferences.getInstance();
+
+  @override
+  void initState() {
+    super.initState();
+
+    _prefs.then((SharedPreferences prefs){
+      String isLocked = prefs.getString("pinlock");
+      if(isLocked != null && isLocked.isNotEmpty) {
+        Future.delayed(Duration.zero, (){
+          showLockScreen(
+              context: context,
+              correctString: isLocked,
+              canBiometric: true,
+              showBiometricFirst: true,
+              biometricAuthenticate: (context) async {
+                final localAuth = LocalAuthentication();
+                final didAuthenticate =
+                await localAuth.authenticateWithBiometrics(
+                    localizedReason: 'Please authenticate');
+                if (didAuthenticate) {
+                  return true;
+                }
+                return false;
+              },
+              onUnlocked: () => {},
+              canCancel: false
+          );
+        });
+      }
+    });
+
+  }
 
   @override
   Widget build(BuildContext context) {
+
     return DefaultTabController(
       length: 2,
       child: Scaffold(
diff --git a/lib/views/settings.dart b/lib/views/settings.dart
index 4ccd37f..7aa8780 100644
--- a/lib/views/settings.dart
+++ b/lib/views/settings.dart
@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:yapgp/main.dart';
 import 'package:yapgp/models/config.dart';
+import 'package:flutter_screen_lock/lock_screen.dart';
 
 class Settings extends StatefulWidget {
 
@@ -16,6 +17,7 @@ class SettingsState extends State<Settings> {
   bool useLightTheme = false;
   String _keyType = Config.DEFAULT_KEY_TYPE;
   int _keyLength = Config.DEFAULT_KEY_LENGTH;
+  String _pinLock = "";
 
   @override
   void initState() {
@@ -25,6 +27,10 @@ class SettingsState extends State<Settings> {
         useLightTheme = (prefs.getInt("light_mode") != null) as bool;
         _keyLength = prefs.getInt("keyLength");
         _keyType = prefs.getString("keyType");
+        _pinLock = prefs.getString("pinlock");
+        if(_pinLock == null) {
+          _pinLock = "";
+        }
       });
     });
   }
@@ -151,6 +157,29 @@ class SettingsState extends State<Settings> {
     );
   }
 
+  Future<void>  _changePinLock(BuildContext context) async {
+    final SharedPreferences prefs = await _prefs;
+    if(_pinLock.isEmpty) {
+      showConfirmPasscode(
+        context: context,
+        confirmTitle: 'Confirm the passcode.',
+        onCompleted: (context, verifyCode) {
+          setState(() {
+            _pinLock = verifyCode;
+          });
+          // Please close yourself
+          Navigator.of(context).maybePop();
+          prefs.setString("pinlock", _pinLock);
+        },
+      );
+      return;
+    }
+    setState(() {
+      _pinLock = "";
+    });
+    prefs.remove("pinlock");
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -192,6 +221,13 @@ class SettingsState extends State<Settings> {
                  _changeKeyLengthDialog(context);
                },
              ),
+             ListTile(
+               title: Text("PIN Lock"),
+               subtitle: Text(_pinLock.isEmpty ? "Not set" : _pinLock),
+               onTap: () {
+                 _changePinLock(context);
+               },
+             ),
         ],
       )
     );
diff --git a/pubspec.lock b/pubspec.lock
index db53ab8..11194ab 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -195,6 +195,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.11"
+  flutter_screen_lock:
+    dependency: "direct main"
+    description:
+      name: flutter_screen_lock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.6"
   flutter_secure_storage:
     dependency: "direct main"
     description:
@@ -289,6 +296,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
+  local_auth:
+    dependency: "direct main"
+    description:
+      name: local_auth
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.3+4"
   logging:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index a9071c7..24866bf 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -15,7 +15,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 1.0.5+9
+version: 1.0.5+10
 
 environment:
   sdk: ">=2.7.0 <3.0.0"
@@ -25,6 +25,8 @@ dependencies:
   shared_preferences: ^0.5.12+4
   flutter_form_builder: ^3.13.2
   flutter_secure_storage: ^3.3.5
+  flutter_screen_lock: ^1.2.6
+  local_auth: ^0.6.3+4
   flutter:
     sdk: flutter