From 6f905319c365a0cbc13814612d426bea2d2e9dad Mon Sep 17 00:00:00 2001
From: Kyle Spearrin <kyle.spearrin@gmail.com>
Date: Thu, 6 Jun 2019 08:04:54 -0400
Subject: [PATCH] prompt fignerprint on resume of lock page

---
 src/App/App.xaml.cs                     |  4 ++++
 src/App/Pages/Accounts/LockPage.xaml.cs | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/App/App.xaml.cs b/src/App/App.xaml.cs
index 240b6f288..43aab025f 100644
--- a/src/App/App.xaml.cs
+++ b/src/App/App.xaml.cs
@@ -184,6 +184,10 @@ namespace Bit.App
             {
                 SyncIfNeeded();
             }
+            if(Current.MainPage is NavigationPage navPage && navPage.CurrentPage is LockPage lockPage)
+            {
+                await lockPage.PromptFingerprintAfterResumeAsync();
+            }
         }
 
         private void SetCulture()
diff --git a/src/App/Pages/Accounts/LockPage.xaml.cs b/src/App/Pages/Accounts/LockPage.xaml.cs
index 2950d6352..f8a7c2aa5 100644
--- a/src/App/Pages/Accounts/LockPage.xaml.cs
+++ b/src/App/Pages/Accounts/LockPage.xaml.cs
@@ -11,6 +11,9 @@ namespace Bit.App.Pages
         private readonly bool _autoPromptFingerprint;
         private readonly LockPageViewModel _vm;
 
+        private bool _promptedAfterResume;
+        private bool _appeared;
+
         public LockPage(AppOptions appOptions = null, bool autoPromptFingerprint = true)
         {
             _appOptions = appOptions;
@@ -42,9 +45,24 @@ namespace Bit.App.Pages
         public Entry MasterPasswordEntry { get; set; }
         public Entry PinEntry { get; set; }
 
+        public async Task PromptFingerprintAfterResumeAsync()
+        {
+            await Task.Delay(500);
+            if(!_promptedAfterResume)
+            {
+                _promptedAfterResume = true;
+                await _vm?.PromptFingerprintAsync();
+            }
+        }
+
         protected override async void OnAppearing()
         {
             base.OnAppearing();
+            if(_appeared)
+            {
+                return;
+            }
+            _appeared = true;
             await _vm.InitAsync(_autoPromptFingerprint);
             if(!_vm.FingerprintLock)
             {