Client connected to the Registration page. LocalSettings are now saved and can be used.

QRBee/QRBee.Android/QRBee.Android.csproj

@@ -78,6 +78,7 @@
     <Compile Include="MainActivity.cs" />
     <Compile Include="Resources\Resource.designer.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Services\LocalSettings.cs" />
     <Compile Include="Services\QRScannerService.cs" />
   </ItemGroup>
   <ItemGroup>

QRBee/QRBee.Android/Services/LocalSettings.cs

@@ -0,0 +1,31 @@
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using QRBee.Services;
+using Xamarin.Forms;
+
+[assembly: Dependency(typeof(QRBee.Droid.Services.LocalSettings))]
+
+namespace QRBee.Droid.Services
+{
+    internal class LocalSettings : ILocalSettings
+    {
+        public string QRBeeApiUrl => "https://localhost:5000";
+
+        public async Task SaveSettings(Settings settings)
+        {
+            var json = JsonConvert.SerializeObject(settings, Formatting.Indented);
+            Application.Current.Properties["Settings"] = json;
+            await Application.Current.SavePropertiesAsync();
+        }
+
+        public Task<Settings> LoadSettings()
+        {
+            if (!Application.Current.Properties.ContainsKey("Settings"))
+                return Task.FromResult(new Settings());
+
+            var json = Application.Current.Properties["Settings"].ToString();
+            var settings = JsonConvert.DeserializeObject<Settings>(json);
+            return Task.FromResult(settings);
+        }
+    }
+}

QRBee/QRBee/QRBee.csproj

@@ -5,6 +5,14 @@
     <ProduceReferenceAssembly>true</ProduceReferenceAssembly>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
   <ItemGroup>
     <PackageReference Include="Plugin.Fingerprint" Version="2.1.4" />
     <PackageReference Include="Xamarin.Forms" Version="5.0.0.2244" />  

QRBee/QRBee/Services/ILocalSettings.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace QRBee.Services
+{
+    public class Settings
+    {
+        public string PIN            { get; set; }
+        public bool IsRegistered     { get; set; }
+
+        public string Name           { get; set; }
+        public string Email          { get; set; }
+        public string DateOfBirth    { get; set; }
+        public string CardNumber     { get; set; }
+        public string ValidFrom      { get; set; }
+        public string ExpirationDate { get; set; }
+        public string CardHolderName { get; set; }
+        public string CVC            { get; set; }
+        public string IssueNo        { get; set; }
+        public string Password       { get; set; }
+    }
+
+    public interface ILocalSettings
+    {
+        string QRBeeApiUrl { get; }
+        Task SaveSettings(Settings settings);
+        Task<Settings> LoadSettings();
+
+
+    }
+}

QRBee/QRBee/ViewModels/LoginViewModel.cs

@@ -1,15 +1,15 @@
-using QRBee.Views;
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Linq;
+using QRBee.Views;
 using Plugin.Fingerprint;
 using Plugin.Fingerprint.Abstractions;
+using QRBee.Services;
 using Xamarin.Forms;
 
 namespace QRBee.ViewModels
 {
     public class LoginViewModel : BaseViewModel
     {
+        private bool _isPinVisible;
         public Command LoginCommand
         {
             get;
@@ -22,7 +22,9 @@ namespace QRBee.ViewModels
         {
             LoginCommand = new Command(OnLoginClicked);
             RegisterCommand = new Command(OnRegisterClicked);
+            
         }
+        public string PinCode { get; }
 
         /// <summary>
         /// Reaction on Login button
@@ -30,11 +32,23 @@ namespace QRBee.ViewModels
         /// <param name="obj"></param>
         private async void OnLoginClicked(object obj)
         {
-            bool isFingerprintAvailable = await CrossFingerprint.Current.IsAvailableAsync(false);
+            var isFingerprintAvailable = await CrossFingerprint.Current.IsAvailableAsync(false);
             if (!isFingerprintAvailable)
             {
                 //Insert PIN
-                return;
+                IsPinVisible = true;
+                var localSettings = DependencyService.Resolve<ILocalSettings>();
+                var pin = (await localSettings.LoadSettings()).PIN;
+
+                if (!string.IsNullOrEmpty(pin) && pin.Equals(PinCode))
+                {
+                    await Shell.Current.GoToAsync($"//{nameof(MainPage)}");
+                }
+                else
+                {
+                    await Shell.Current.GoToAsync($"{nameof(RegisterPage)}");
+                }
+
             }
 
             var conf = new AuthenticationRequestConfiguration("Authentication", "Authenticate access to your personal data");
@@ -53,6 +67,20 @@ namespace QRBee.ViewModels
             }
         }
 
+        public bool IsPinVisible
+        {
+            get => _isPinVisible;
+            set
+            {
+                if (value == _isPinVisible)
+                {
+                    return;
+                }
+                _isPinVisible = value;
+                OnPropertyChanged(nameof(IsPinVisible));
+            }
+        }
+
         /// <summary>
         /// Reaction on Register button
         /// </summary>

QRBee/QRBee/ViewModels/RegisterViewModel.cs

@@ -1,6 +1,8 @@
 using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Linq;
+using System.Net.Http;
+using QRBee.Core;
+using QRBee.Services;
 using QRBee.Views;
 using Xamarin.Forms;
 
@@ -62,12 +64,49 @@ namespace QRBee.ViewModels
                 OnPropertyChanged(nameof(Password2Color));
             }
         }
-
-
+        public string Pin { get; set; }
 
         private async void OnRegisterClicked(object obj)
         {
-            await Shell.Current.GoToAsync($"//{nameof(MainPage)}");
+            using var client = new HttpClient();
+            var localSettings = DependencyService.Resolve<ILocalSettings>();
+
+            var service = new Core.Client.Client(localSettings.QRBeeApiUrl,client);
+
+            try
+            {
+                await service.RegisterAsync(new RegistrationRequest
+                {
+                    DateOfBirth        = DateOfBirth,
+                    Email              = Email,
+                    Name               = Name,
+                    RegisterAsMerchant = false
+                });
+
+                //save local settings
+                var settings = new Settings
+                {
+                    CardHolderName = CardHolderName, 
+                    CardNumber     = CardNumber, 
+                    CVC            = CVC, 
+                    DateOfBirth    = DateOfBirth, 
+                    Email          = Email, 
+                    ExpirationDate = ExpirationDate,
+                    IsRegistered   = true,
+                    IssueNo        = IssueNo,
+                    ValidFrom      = ValidFrom,
+                    Name           = Name, 
+                    PIN            = Pin
+                };
+                await localSettings.SaveSettings(settings);
+
+                await Shell.Current.GoToAsync($"//{nameof(MainPage)}");
+            }
+            catch (Exception)
+            {
+                var page = Application.Current.MainPage.Navigation.NavigationStack.LastOrDefault();
+                await page.DisplayAlert("Error", "The Backend isn't working", "Ok");
+            }
         }
 
     }

QRBee/QRBee/Views/LoginPage.xaml

@@ -10,13 +10,10 @@
     <ContentPage.Content>
 
         <StackLayout Padding="10,0,10,0" VerticalOptions="Center">
-            <!-- <StackLayout Orientation="Vertical"> -->
-            <!--     <Label Text="Login: " Padding="5,10,0,0"/> -->
-            <!--     <Entry HorizontalOptions="FillAndExpand" Keyboard="Text"/> -->
-            <!-- -->
-            <!--     <Label Text="Password: "  Padding="5,0,0,0" /> -->
-            <!--     <Entry HorizontalOptions="FillAndExpand" IsPassword="True"/> -->
-            <!-- </StackLayout> -->
+            <StackLayout Orientation="Vertical" IsVisible="{Binding IsPinVisible}">
+                <Label Text="PIN code: "  Padding="5,0,0,0" />
+                <Entry HorizontalOptions="FillAndExpand" IsPassword="True" Text="{Binding PinCode}" Keyboard="Numeric" MaxLength="4"/>
+            </StackLayout>
 
             <Button VerticalOptions="Center" Text="Login" Command="{Binding LoginCommand}"/>
             <Button VerticalOptions="Center" Text="Register new user" Command="{Binding RegisterCommand}"/>

QRBee/QRBee/Views/RegisterPage.xaml

@@ -23,6 +23,9 @@
 
                     <Label Text="Confirm password: " Padding="5,5,0,0" />
                     <Entry HorizontalOptions="FillAndExpand" IsPassword="True" Text="{Binding Password2}" TextColor="{Binding Password2Color}"/>
+
+                    <Label Text="Login PIN: " Padding="5,5,0,0" />
+                    <Entry HorizontalOptions="FillAndExpand" IsPassword="True" Text="{Binding Pin}" Keyboard="Numeric" MaxLength="4"/>
                 </StackLayout>
 
                 <StackLayout Orientation="Vertical">