From 9347a6160fff17cf4bc0019043f0cd6b30c8bd44 Mon Sep 17 00:00:00 2001
From: TheJoKlLa <thejoklla@gmail.com>
Date: Sun, 24 Jan 2021 23:56:27 +0100
Subject: [PATCH] Added: BFFHInstanceService

---
 Borepin/Borepin/App.xaml.cs                   |   8 +-
 Borepin/Borepin/Borepin.csproj                |   8 +
 Borepin/Borepin/Model/BFFHInstance.cs         |  12 +
 Borepin/Borepin/Page/MainPage.xaml            |   1 +
 Borepin/Borepin/Page/ServerInstancesPage.xaml |  12 +
 .../Borepin/Page/ServerInstancesPage.xaml.cs  |  20 ++
 .../Borepin/PageModel/HostSelectPageModel.cs  |  15 +-
 Borepin/Borepin/PageModel/MachinePageModel.cs | 184 +++++++------
 .../Borepin/PageModel/MachinesPageModel.cs    |   6 -
 .../PageModel/ServerInstancesPageModel.cs     |  35 +++
 Borepin/Borepin/Service/BFFHService.cs        |  22 +-
 Borepin/Borepin/Service/Hosts/HostService.cs  |  75 ------
 Borepin/Borepin/Service/Hosts/IHostService.cs |  15 --
 Borepin/Borepin/Service/MachineService.cs     | 250 ------------------
 .../ServerInstances/BFFHInstanceService.cs    |  98 +++++++
 .../ServerInstances/IBFFHInstanceService.cs   |  18 ++
 Borepin/Borepin/View/HostView.xaml            |  10 +
 Borepin/Borepin/View/HostView.xaml.cs         |  20 ++
 Borepin/Borepin/ViewModel/HostViewModel.cs    |  12 +
 19 files changed, 357 insertions(+), 464 deletions(-)
 create mode 100644 Borepin/Borepin/Model/BFFHInstance.cs
 create mode 100644 Borepin/Borepin/Page/ServerInstancesPage.xaml
 create mode 100644 Borepin/Borepin/Page/ServerInstancesPage.xaml.cs
 create mode 100644 Borepin/Borepin/PageModel/ServerInstancesPageModel.cs
 delete mode 100644 Borepin/Borepin/Service/Hosts/HostService.cs
 delete mode 100644 Borepin/Borepin/Service/Hosts/IHostService.cs
 delete mode 100644 Borepin/Borepin/Service/MachineService.cs
 create mode 100644 Borepin/Borepin/Service/ServerInstances/BFFHInstanceService.cs
 create mode 100644 Borepin/Borepin/Service/ServerInstances/IBFFHInstanceService.cs
 create mode 100644 Borepin/Borepin/View/HostView.xaml
 create mode 100644 Borepin/Borepin/View/HostView.xaml.cs
 create mode 100644 Borepin/Borepin/ViewModel/HostViewModel.cs

diff --git a/Borepin/Borepin/App.xaml.cs b/Borepin/Borepin/App.xaml.cs
index d27bb64..4e3cb66 100644
--- a/Borepin/Borepin/App.xaml.cs
+++ b/Borepin/Borepin/App.xaml.cs
@@ -4,6 +4,7 @@ using Borepin.PageModel;
 using Borepin.Page;
 using Xamarin.Forms;
 using Borepin.Service;
+using Borepin.Service.ServerInstances;
 
 namespace Borepin
 {
@@ -36,8 +37,13 @@ namespace Borepin
             containerRegistry.RegisterForNavigation<LoginPasswordPage, LoginPasswordPageModel>();
             containerRegistry.RegisterForNavigation<HostSelectPage, HostSelectPageModel>();
             containerRegistry.RegisterForNavigation<LoginChoosePage, LoginChoosePageModel>();
+            containerRegistry.RegisterForNavigation<ServerInstancesPage, ServerInstancesPageModel>();
+            
+
+            BFFHInstanceService bffhInstanceService = new BFFHInstanceService();
+            containerRegistry.RegisterInstance<IBFFHInstanceService>(bffhInstanceService);
+            containerRegistry.RegisterInstance<BFFHService>(new BFFHService(bffhInstanceService));
 
-            containerRegistry.RegisterInstance<BFFHService>(new BFFHService());
         }
     }
 }
diff --git a/Borepin/Borepin/Borepin.csproj b/Borepin/Borepin/Borepin.csproj
index 3aee9d7..7673c6f 100644
--- a/Borepin/Borepin/Borepin.csproj
+++ b/Borepin/Borepin/Borepin.csproj
@@ -20,6 +20,7 @@
     <Warning Text="$(MSBuildProjectFile) is Multilingual build enabled, but the Multilingual App Toolkit is unavailable during the build. If building with Visual Studio, please check to ensure that toolkit is properly installed." />
   </Target>
   <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="Prism.DryIoc.Forms" Version="8.0.0.1909" />
     <PackageReference Include="Xamarin.Forms" Version="4.8.0.1687" />
     <PackageReference Include="Xamarin.Essentials" Version="1.5.3.2" />
@@ -66,6 +67,9 @@
     <EmbeddedResource Update="Page\MainPage.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Update="Page\ServerInstancesPage.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
     <EmbeddedResource Update="Page\SettingsPage.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
@@ -80,10 +84,14 @@
     <EmbeddedResource Update="Styles\LightTheme.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Update="View\HostView.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Base\" />
     <Folder Include="Behaviour\" />
+    <Folder Include="Page\LoginDialog\" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\FabAccessAPI\FabAccessAPI.csproj" />
diff --git a/Borepin/Borepin/Model/BFFHInstance.cs b/Borepin/Borepin/Model/BFFHInstance.cs
new file mode 100644
index 0000000..c924f8a
--- /dev/null
+++ b/Borepin/Borepin/Model/BFFHInstance.cs
@@ -0,0 +1,12 @@
+using System;
+namespace Borepin.Model
+{
+    public class BFFHInstance
+    {
+        public Uri Address { get; set; }
+
+        public string Name { get; set; } = "";
+
+        public string Description { get; set; } = "";
+    }
+}
diff --git a/Borepin/Borepin/Page/MainPage.xaml b/Borepin/Borepin/Page/MainPage.xaml
index c5e610b..48d67aa 100644
--- a/Borepin/Borepin/Page/MainPage.xaml
+++ b/Borepin/Borepin/Page/MainPage.xaml
@@ -9,6 +9,7 @@
             <StackLayout>
                 <Button Text="Machines" Command="{Binding NavigateCommand}" CommandParameter="MachinesPage" />
                 <Button Text="Settings" Command="{Binding NavigateCommand}" CommandParameter="SettingsPage" />
+                <Button Text="Servers" Command="{Binding NavigateCommand}" CommandParameter="ServerInstancesPage" />
             </StackLayout>
         </ContentPage>
     </MasterDetailPage.Master>
diff --git a/Borepin/Borepin/Page/ServerInstancesPage.xaml b/Borepin/Borepin/Page/ServerInstancesPage.xaml
new file mode 100644
index 0000000..8961d0e
--- /dev/null
+++ b/Borepin/Borepin/Page/ServerInstancesPage.xaml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Borepin.Page.ServerInstancesPage">
+    <ContentPage.Content>
+        <StackLayout>
+            <Label Text="Welcome to Xamarin.Forms!"
+                VerticalOptions="CenterAndExpand" 
+                HorizontalOptions="CenterAndExpand" />
+        </StackLayout>
+    </ContentPage.Content>
+</ContentPage>
\ No newline at end of file
diff --git a/Borepin/Borepin/Page/ServerInstancesPage.xaml.cs b/Borepin/Borepin/Page/ServerInstancesPage.xaml.cs
new file mode 100644
index 0000000..04df04e
--- /dev/null
+++ b/Borepin/Borepin/Page/ServerInstancesPage.xaml.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace Borepin.Page
+{
+    [XamlCompilation(XamlCompilationOptions.Compile)]
+    public partial class ServerInstancesPage : ContentPage
+    {
+        public ServerInstancesPage()
+        {
+            InitializeComponent();
+        }
+    }
+}
\ No newline at end of file
diff --git a/Borepin/Borepin/PageModel/HostSelectPageModel.cs b/Borepin/Borepin/PageModel/HostSelectPageModel.cs
index 95453a5..44c7f9d 100644
--- a/Borepin/Borepin/PageModel/HostSelectPageModel.cs
+++ b/Borepin/Borepin/PageModel/HostSelectPageModel.cs
@@ -1,4 +1,5 @@
 using Borepin.Service;
+using Borepin.Service.ServerInstances;
 using Prism.Mvvm;
 using Prism.Navigation;
 using System;
@@ -14,11 +15,13 @@ namespace Borepin.PageModel
     public class HostSelectPageModel : BindableBase
     {
         private INavigationService _NavigationService;
+        private IBFFHInstanceService _BFFHInstanceService;
         private BFFHService _BFFHService;
 
-        public HostSelectPageModel(INavigationService navigationService, BFFHService bffhService)
+        public HostSelectPageModel(INavigationService navigationService, BFFHService bffhService, IBFFHInstanceService bffhInstanceService)
         {
             _NavigationService = navigationService;
+            _BFFHInstanceService = bffhInstanceService;
             _BFFHService = bffhService;
 
             UseHostCommand = new Command(UseHostCommandExecuted);
@@ -29,15 +32,7 @@ namespace Borepin.PageModel
 
         private async Task LoadData()
         {
-            ObservableCollection<Uri> hosts_list = await _BFFHService.GetKnownHostsAsync();
-
-            ObservableCollection<string> host_string_list = new ObservableCollection<string>();
-            foreach(Uri host in hosts_list)
-            {
-                host_string_list.Add(host.ToString());
-            }
-
-            KnownHost_List = host_string_list;
+            
         }
 
         private string _Host;
diff --git a/Borepin/Borepin/PageModel/MachinePageModel.cs b/Borepin/Borepin/PageModel/MachinePageModel.cs
index 00713a4..851c015 100644
--- a/Borepin/Borepin/PageModel/MachinePageModel.cs
+++ b/Borepin/Borepin/PageModel/MachinePageModel.cs
@@ -2,10 +2,6 @@
 using Borepin.Service;
 using Prism.Mvvm;
 using Prism.Navigation;
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Input;
 using Xamarin.Forms;
 
@@ -14,12 +10,12 @@ namespace Borepin.PageModel
     public class MachinePageModel : BindableBase, INavigationAware
     {
         private INavigationService _NavigationService;
-        private BFFHInterface _BFFHInterface;
+        private BFFHService _BFFHService;
 
-        public MachinePageModel(INavigationService navigationService)
+        public MachinePageModel(INavigationService navigationService, BFFHService bffhService)
         {
             _NavigationService = navigationService;
-            _BFFHInterface = BFFHActiveInterface.Interface;
+            _BFFHService = bffhService;
 
             ReserveMachineCommand = new Command(ReserveMachineCommandExecuted);
             UseMachineCommand = new Command(UseMachineCommandExecuted);
@@ -51,8 +47,8 @@ namespace Borepin.PageModel
 
         private void ReserveMachineCommandExecuted()
         {
-            _BFFHInterface.ReserveMachine(Machine.ID);
-            UpdateMachine();
+            //_BFFHInterface.ReserveMachine(Machine.ID);
+            //UpdateMachine();
         }
 
 
@@ -65,8 +61,8 @@ namespace Borepin.PageModel
 
         private void UseMachineCommandExecuted()
         {
-            _BFFHInterface.UseMachine(Machine.ID);
-            UpdateMachine();
+            //_BFFHInterface.UseMachine(Machine.ID);
+            //UpdateMachine();
         }
 
         private ICommand _GiveBackMachineCommand;
@@ -78,8 +74,8 @@ namespace Borepin.PageModel
 
         private void GiveBackMachineCommandExecuted()
         {
-            _BFFHInterface.GiveBackMachine(Machine.ID);
-            UpdateMachine();
+            //_BFFHInterface.GiveBackMachine(Machine.ID);
+            //UpdateMachine();
         }
 
         private ICommand _DisableMachineCommand;
@@ -91,16 +87,16 @@ namespace Borepin.PageModel
 
         private void DisableMachineCommandExecuted()
         {
-            if(Machine.State == MachineStates.Disabled)
-            {
-                _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Free);
-            }
-            else
-            {
-                _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Disabled);
-            }
+            //if(Machine.State == MachineStates.Disabled)
+            //{
+            //    _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Free);
+            //}
+            //else
+            //{
+            //    _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Disabled);
+            //}
 
-            UpdateMachine();
+            //UpdateMachine();
         }
 
         private ICommand _BlockMachineCommand;
@@ -112,43 +108,43 @@ namespace Borepin.PageModel
 
         private void BlockMachineCommandExecuted()
         {
-            if (Machine.State == MachineStates.Blocked)
-            {
-                _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Free);
-            }
-            else
-            {
-                _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Blocked);
-            }
+            //if (Machine.State == MachineStates.Blocked)
+            //{
+            //    _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Free);
+            //}
+            //else
+            //{
+            //    _BFFHInterface.SetStateForce(Machine.ID, MachineStates.Blocked);
+            //}
 
-            UpdateMachine();
+            //UpdateMachine();
         }
 
         public bool CanUse
         {
             get
             {
-                if(Machine == null)
-                {
-                    return false;
-                }
+                //if(Machine == null)
+                //{
+                //    return false;
+                //}
 
-                if(Machine.State == MachineStates.Free)
-                {
-                    return true;
-                }
+                //if(Machine.State == MachineStates.Free)
+                //{
+                //    return true;
+                //}
 
-                if(Machine.State == MachineStates.Reserved)
-                {
-                    if(Machine.User == _BFFHInterface.ActiveUser)
-                    {
-                        return true;
-                    }
-                    else if(_BFFHInterface.IsAdmin())
-                    {
-                        return true;
-                    }
-                }
+                //if(Machine.State == MachineStates.Reserved)
+                //{
+                //    if(Machine.User == _BFFHInterface.ActiveUser)
+                //    {
+                //        return true;
+                //    }
+                //    else if(_BFFHInterface.IsAdmin())
+                //    {
+                //        return true;
+                //    }
+                //}
 
                 return false;
             }
@@ -158,15 +154,15 @@ namespace Borepin.PageModel
         {
             get
             {
-                if (Machine == null)
-                {
-                    return false;
-                }
+                //if (Machine == null)
+                //{
+                //    return false;
+                //}
 
-                if (Machine.State == MachineStates.Free)
-                {
-                    return true;
-                }
+                //if (Machine.State == MachineStates.Free)
+                //{
+                //    return true;
+                //}
 
                 return false;
             }
@@ -176,15 +172,15 @@ namespace Borepin.PageModel
         {
             get
             {
-                if (Machine == null)
-                {
-                    return false;
-                }
+                //if (Machine == null)
+                //{
+                //    return false;
+                //}
 
-                if (Machine.State == MachineStates.InUse && Machine.User == _BFFHInterface.ActiveUser)
-                {
-                    return true;
-                }
+                //if (Machine.State == MachineStates.InUse && Machine.User == _BFFHInterface.ActiveUser)
+                //{
+                //    return true;
+                //}
 
                 return false;
             }
@@ -194,15 +190,15 @@ namespace Borepin.PageModel
         {
             get
             {
-                if (_BFFHInterface == null)
-                {
-                    return false;
-                }
+                //if (_BFFHInterface == null)
+                //{
+                //    return false;
+                //}
 
-                if (_BFFHInterface.IsAdmin())
-                {
-                    return true;
-                }
+                //if (_BFFHInterface.IsAdmin())
+                //{
+                //    return true;
+                //}
 
                 return false;
             }
@@ -210,11 +206,11 @@ namespace Borepin.PageModel
 
         public void UpdateMachine()
         {
-            Machine = BFFHService_OLD.GetMachine(Machine.ID);
+            //Machine = BFFHService_OLD.GetMachine(Machine.ID);
 
-            OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("CanUse"));
-            OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("CanReserve"));
-            OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("CanGiveBack"));
+            //OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("CanUse"));
+            //OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("CanReserve"));
+            //OnPropertyChanged(new System.ComponentModel.PropertyChangedEventArgs("CanGiveBack"));
         }
 
         public void OnNavigatedFrom(INavigationParameters parameters)
@@ -224,25 +220,25 @@ namespace Borepin.PageModel
 
         public void OnNavigatedTo(INavigationParameters parameters)
         {
-            string machineID = parameters["machineID"] as string;
+            //string machineID = parameters["machineID"] as string;
 
-            if(machineID == null)
-            {
-                _IsValid = false;
-                return;
-            }
+            //if(machineID == null)
+            //{
+            //    _IsValid = false;
+            //    return;
+            //}
 
-            try
-            {
-                Machine = BFFHService_OLD.GetMachine(machineID);
-                IsValid = true;
+            //try
+            //{
+            //    Machine = BFFHService_OLD.GetMachine(machineID);
+            //    IsValid = true;
 
-                UpdateMachine();
-            }
-            catch
-            {
-                _IsValid = false;
-            }
+            //    UpdateMachine();
+            //}
+            //catch
+            //{
+            //    _IsValid = false;
+            //}
         }
     }
 }
diff --git a/Borepin/Borepin/PageModel/MachinesPageModel.cs b/Borepin/Borepin/PageModel/MachinesPageModel.cs
index 4a6f3aa..1be6b2c 100644
--- a/Borepin/Borepin/PageModel/MachinesPageModel.cs
+++ b/Borepin/Borepin/PageModel/MachinesPageModel.cs
@@ -1,11 +1,7 @@
 using Borepin.Model;
-using Borepin.Service;
 using Prism.Mvvm;
 using Prism.Navigation;
-using System;
-using System.Collections.Generic;
 using System.Collections.ObjectModel;
-using System.Text;
 using System.Windows.Input;
 using Xamarin.Forms;
 
@@ -19,8 +15,6 @@ namespace Borepin.PageModel
         {
             _NavigationService = navigationService;
             GoToMachineCommand = new Command<object>(GoToMachineCommandExecuted);
-
-            MachineList = new ObservableCollection<Machine>(BFFHService_OLD.GetMachines());
         }
 
         private ICommand _GoToMachineCommand;
diff --git a/Borepin/Borepin/PageModel/ServerInstancesPageModel.cs b/Borepin/Borepin/PageModel/ServerInstancesPageModel.cs
new file mode 100644
index 0000000..b455f70
--- /dev/null
+++ b/Borepin/Borepin/PageModel/ServerInstancesPageModel.cs
@@ -0,0 +1,35 @@
+using Borepin.Model;
+using Borepin.Service.ServerInstances;
+using Prism.Mvvm;
+using Prism.Navigation;
+using System.Collections.ObjectModel;
+using System.Threading.Tasks;
+
+namespace Borepin.PageModel
+{
+    public class ServerInstancesPageModel : BindableBase
+    {
+        private INavigationService _NavigationService;
+        private IBFFHInstanceService _BFFHInstanceService;
+
+        public ServerInstancesPageModel(INavigationService navigationService, IBFFHInstanceService bffhInstanceService)
+        {
+            _NavigationService = navigationService;
+            _BFFHInstanceService = bffhInstanceService;
+
+            LoadData();
+        }
+
+        private async Task LoadData()
+        {
+            _ServerInstance_List = new ObservableCollection<BFFHInstance>(await _BFFHInstanceService.GetBFFHInstances());
+        }
+
+        private ObservableCollection<BFFHInstance> _ServerInstance_List;
+        public ObservableCollection<BFFHInstance> ServerInstance_List
+        {
+            get => _ServerInstance_List;
+            set => SetProperty(ref _ServerInstance_List, value);
+        }
+    }
+}
diff --git a/Borepin/Borepin/Service/BFFHService.cs b/Borepin/Borepin/Service/BFFHService.cs
index ef917dd..8cfe1c3 100644
--- a/Borepin/Borepin/Service/BFFHService.cs
+++ b/Borepin/Borepin/Service/BFFHService.cs
@@ -2,30 +2,26 @@
 using System.Collections.Generic;
 using FabAccessAPI;
 using Capnp.Rpc;
-using Borepin.Service.Hosts;
 using Borepin.Service.Credentials;
 using Borepin.Model;
 using System.Threading.Tasks;
-using System.Collections.ObjectModel;
+using Borepin.Service.ServerInstances;
 
 namespace Borepin.Service
 {
     public class BFFHService
     {
-        public Uri ConnectedHost;
-        private Connection _Connection;
-        private HostService _HostService;
+        private IBFFHInstanceService _BFFHInstanceService;
         private CredentialsService _CredentialsService;
 
-        public BFFHService()
-        {
-            _HostService = new HostService();
-            _CredentialsService = new CredentialsService();
-        }
+        private Connection _Connection;
 
-        public async Task<ObservableCollection<Uri>> GetKnownHostsAsync()
+        public Uri ConnectedHost { get; private set; }
+        
+        public BFFHService(IBFFHInstanceService bffhInstanceService)
         {
-            return await _HostService.GetKnownHostsAsync();
+            _BFFHInstanceService = bffhInstanceService;
+            _CredentialsService = new CredentialsService();
         }
 
         public void Connect(Uri host)
@@ -40,7 +36,7 @@ namespace Borepin.Service
 
             Connection connection_test = new Connection(rpcClient);
 
-            _HostService.LogHostAsync(host);
+            _BFFHInstanceService.AddBFFHInstance(new BFFHInstance() { Address = host });
 
             _Connection = connection_test;
             ConnectedHost = host;
diff --git a/Borepin/Borepin/Service/Hosts/HostService.cs b/Borepin/Borepin/Service/Hosts/HostService.cs
deleted file mode 100644
index 7ac167e..0000000
--- a/Borepin/Borepin/Service/Hosts/HostService.cs
+++ /dev/null
@@ -1,75 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Text;
-using System.Threading.Tasks;
-using Xamarin.Essentials;
-
-namespace Borepin.Service.Hosts
-{
-    public class HostService : IHostService
-    {
-        public List<Uri> KnownHosts { get; set; }
-
-        public HostService()
-        {
-            KnownHosts = new List<Uri>();
-
-            LoadKnownHosts();
-        }
-            
-        public Task<ObservableCollection<Uri>> GetKnownHostsAsync()
-        {
-            return Task.FromResult(new ObservableCollection<Uri>(KnownHosts));
-        }
-
-        public Task<bool> LogHostAsync(Uri host)
-        {
-            if (KnownHosts.Contains(host))
-            {
-                return Task.FromResult(true);
-            }
-
-            KnownHosts.Add(host);
-            return SaveKnownHosts();
-        }
-
-        public Task<bool> LoadKnownHosts()
-        {
-            string knownhosts = Preferences.Get("bffh_knownhost", "");
-
-            List<Uri> knownhost_list = new List<Uri>();
-
-            string[] split = knownhosts.Split(',');
-
-            foreach (string host in split)
-            {
-                if (host == "")
-                {
-                    continue;
-                }
-
-                Uri host_new = new Uri(host);
-                knownhost_list.Add(host_new);
-            }
-
-            KnownHosts = knownhost_list;
-
-            return Task.FromResult(true);
-        }
-
-        public Task<bool> SaveKnownHosts()
-        {
-            string knownhosts = "";
-
-            foreach(Uri host in KnownHosts)
-            {
-                knownhosts += "," + host.ToString();
-            }
-                
-            Preferences.Set("knownhosts", knownhosts);
-
-            return Task.FromResult(true);
-        }
-    }
-}
diff --git a/Borepin/Borepin/Service/Hosts/IHostService.cs b/Borepin/Borepin/Service/Hosts/IHostService.cs
deleted file mode 100644
index 8c69064..0000000
--- a/Borepin/Borepin/Service/Hosts/IHostService.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Borepin.Service.Hosts
-{
-    public interface IHostService
-    {
-        Task<ObservableCollection<Uri>> GetKnownHostsAsync();
-
-        Task<bool> LogHostAsync(Uri host);
-    }
-}
diff --git a/Borepin/Borepin/Service/MachineService.cs b/Borepin/Borepin/Service/MachineService.cs
deleted file mode 100644
index 711175f..0000000
--- a/Borepin/Borepin/Service/MachineService.cs
+++ /dev/null
@@ -1,250 +0,0 @@
-using Borepin.Model;
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace Borepin.Service
-{
-    public static class BFFHDataService
-    {
-        public static List<Machine> _Machines;
-        public static List<User> _Users;
-
-        static BFFHDataService()
-        {
-            _Users = new List<User>()
-            {
-                new User()
-                {
-                    ID = "0",
-                    Name = "Nick Wise (Admin)",
-                    OriginalWorkshop = "fvm.fab-access.org"
-                },
-                new User()
-                {
-                    ID = "1",
-                    Name = "Tamia Langley",
-                    OriginalWorkshop = "fvm.fab-access.org"
-                },
-                new User()
-                {
-                    ID = "2",
-                    Name = "Jay James",
-                    OriginalWorkshop = "fvm.fab-access.org"
-                },
-                new User()
-                {
-                    ID = "3",
-                    Name = "Darragh Ellwood",
-                    OriginalWorkshop = "happylab.fab-access.org"
-                },
-                new User()
-                {
-                    ID = "4",
-                    Name = "Mila-Rose Mcknight",
-                    OriginalWorkshop = "motionlab.fab-access.org"
-                }
-            };
-
-            _Machines = new List<Machine>()
-            {
-                new Machine()
-                {
-                    ID = "MakerRobo UP",
-                    Description = "MakerRobo UP is a 3D Printer from Bangladesh",
-                    State = MachineStates.Free,
-                    User = null
-                },
-                new Machine()
-                {
-                    ID = "LS-1080-K 150W",
-                    Description = "Laser cutting and engraving" + "\n" +
-                                  "Cutting Area: 1000 x 800 mm" + "\n" +
-                                  "Materials: wood, cardboard, PMMA, textiles, etc." + "\n" +
-                                  "Supported files: DXF, AI, EPS, JPG, BMP",
-                    State = MachineStates.InUse,
-                    User = _Users.Find(x => x.ID == "1")
-                },
-                new Machine()
-                {
-                    ID = "Fireball V90",
-                    Description = "The V90 is a high performance, general purpose machine, suitable for many uses such as clock making, plaques, RC aircraft parts and more. 12x18x3 working space.",
-                    State = MachineStates.ToCheck,
-                    User = _Users.Find(x => x.ID == "0")
-                },
-                new Machine()
-                {
-                    ID = "IRB 1600-145 kg",
-                    Description = "Robotic Arm",
-                    State = MachineStates.Blocked,
-                    User = null
-                },
-                new Machine()
-                {
-                    ID = "Carmine 1.09",
-                    Description = "Primesense",
-                    State = MachineStates.Disabled,
-                    User = null
-                },
-                new Machine()
-                {
-                    ID = "Zmorph 2.0SX Multitool",
-                    Description = "FabLab in a box ",
-                    State = MachineStates.Reserved,
-                    User = _Users.Find(x => x.ID == "2")
-                },
-                new Machine()
-                {
-                    ID = "CubePro Duo",
-                    Description = "The CubePro features the largest-in-class build platform with ultra high-resolution. With prints 2.5 times larger than any other desktop prosumer and hobbyist printer (11.2 x 10.6 x 9.06 or 285.4mm x 270.4mm x 230mm) with ultra high-resolution settings of 70-micron thin print layers, professional quality printing has never been so large or easy.",
-                    State = MachineStates.Free,
-                    User = null
-                },
-            };
-        }
-    }
-
-    public static class BFFHActiveInterface
-    {
-        public static BFFHInterface Interface;
-    }
-
-    public class BFFHInterface
-    {
-        public readonly User ActiveUser;
-        public BFFHInterface(string userID)
-        {
-            ActiveUser = BFFHDataService._Users.Find(x => x.ID == userID);
-        }
-
-        public void UseMachine(string machineID)
-        {
-            Machine machinetouse = BFFHDataService._Machines.Find(x => x.ID == machineID);
-            
-            if (machinetouse == null)
-            {
-                throw new Exception("Unknown Machine");
-            }
-
-            int index = BFFHDataService._Machines.IndexOf(machinetouse);
-
-            if (machinetouse.State == MachineStates.Free)
-            {
-                machinetouse.State = MachineStates.InUse;
-                machinetouse.User = ActiveUser;
-            }
-
-            if(machinetouse.State == MachineStates.Reserved && machinetouse.User == ActiveUser)
-            {
-                machinetouse.State = MachineStates.InUse;
-                machinetouse.User = ActiveUser;
-            }
-
-            BFFHDataService._Machines[index] = machinetouse;
-        }
-
-        public void ReserveMachine(string machineID)
-        {
-            Machine machinetouse = BFFHDataService._Machines.Find(x => x.ID == machineID);
-            if (machinetouse == null)
-            {
-                throw new Exception("Unknown Machine");
-            }
-
-            int index = BFFHDataService._Machines.IndexOf(machinetouse);
-
-            if (machinetouse.State == MachineStates.Free)
-            {
-                machinetouse.State = MachineStates.Reserved;
-                machinetouse.User = ActiveUser;
-            }
-
-            BFFHDataService._Machines[index] = machinetouse;
-        }
-
-        public void GiveBackMachine(string machineID)
-        {
-            Machine machinetogiveback = BFFHDataService._Machines.Find(x => x.ID == machineID);
-            if (machinetogiveback == null)
-            {
-                throw new Exception("Unknown Machine");
-            }
-
-            int index = BFFHDataService._Machines.IndexOf(machinetogiveback);
-
-            if (machinetogiveback.State == MachineStates.InUse)
-            {
-                machinetogiveback.State = MachineStates.Free;
-                machinetogiveback.User = null;
-            }
-
-            BFFHDataService._Machines[index] = machinetogiveback;
-        }
-
-        public void SetStateForce(string machineID, MachineStates state)
-        {
-            if(IsAdmin())
-            {
-                Machine machinetosetstate = BFFHDataService._Machines.Find(x => x.ID == machineID);
-                if (machinetosetstate == null)
-                {
-                    throw new Exception("Unknown Machine");
-                }
-
-                int index = BFFHDataService._Machines.IndexOf(machinetosetstate);
-
-                machinetosetstate.State = state;
-
-                BFFHDataService._Machines[index] = machinetosetstate;
-            }
-            else
-            {
-                throw new Exception("Forbidden");
-            }
-        }
-
-        public bool IsAdmin()
-        {
-            return ActiveUser.ID == BFFHService_OLD.AdminID;
-        }
-    }
-
-
-    public static class BFFHService_OLD
-    {
-        public static readonly string Host = "fvm.fab-access.org";
-        public static readonly string AdminID = "0";
-
-        public static BFFHInterface Auth(string userID)
-        {
-            if(BFFHDataService._Users.Find(x => x.ID == userID) == null)
-            {
-                throw new Exception("Authentication failed");
-            }
-
-            return new BFFHInterface(userID);
-        }
-
-        public static List<Machine> GetMachines()
-        {
-            return BFFHDataService._Machines;
-        }
-
-        public static List<User> GetUsers()
-        {
-            return BFFHDataService._Users;
-        }
-
-        public static Machine GetMachine(string machineID)
-        {
-            Machine m = BFFHDataService._Machines.Find(x => x.ID == machineID);
-
-            if (m == null)
-            {
-                throw new Exception("Unknown Machine");
-            }
-
-            return m;
-        }
-    }
-}
diff --git a/Borepin/Borepin/Service/ServerInstances/BFFHInstanceService.cs b/Borepin/Borepin/Service/ServerInstances/BFFHInstanceService.cs
new file mode 100644
index 0000000..5183d75
--- /dev/null
+++ b/Borepin/Borepin/Service/ServerInstances/BFFHInstanceService.cs
@@ -0,0 +1,98 @@
+using Borepin.Model;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Xamarin.Essentials;
+
+namespace Borepin.Service.ServerInstances
+{
+    /// <summary>
+    /// Save connected BFFHInstances in Xamarin.Essentials.Preferences
+    /// </summary>
+    public class BFFHInstanceService : IBFFHInstanceService
+    {
+        private List<BFFHInstance> _BFFHInstance_List;
+
+        public Task<List<BFFHInstance>> GetBFFHInstances()
+        {
+            List<BFFHInstance> bffhInstances = JsonConvert.DeserializeObject<List<BFFHInstance>>(Preferences.Get("bffhinstances", "[]"));
+
+            _BFFHInstance_List = bffhInstances;
+
+            return Task.FromResult(bffhInstances);
+        }
+
+        public Task<bool> AddBFFHInstance(BFFHInstance instance)
+        {
+            if(_BFFHInstance_List == null)
+            {
+                GetBFFHInstances();
+            }
+
+            if(_BFFHInstance_List.Find(x => x.Address == instance.Address) != null)
+            {
+                return Task.FromResult(true);
+            }
+
+            _BFFHInstance_List.Add(instance);
+
+            SaveList();
+
+            return Task.FromResult(true);
+        }
+        
+        public Task<bool> UpdateBFFHInstance(BFFHInstance instance)
+        {
+            if (_BFFHInstance_List == null)
+            {
+                GetBFFHInstances();
+            }
+
+            if (_BFFHInstance_List.Find(x => x.Address == instance.Address) == null)
+            {
+                throw new ArgumentException("BFFH Instance does not exist");
+            }
+
+            foreach (BFFHInstance bffh in _BFFHInstance_List.Where(x => x.Address == instance.Address))
+            {
+                bffh.Name = instance.Name;
+                bffh.Description = instance.Description;
+            }
+
+            SaveList();
+
+            return Task.FromResult(true);
+        }
+
+        private Task<bool> SaveList()
+        {
+            Preferences.Set("bffhinstances", JsonConvert.SerializeObject(_BFFHInstance_List));
+
+            return Task.FromResult(true);
+        }
+
+        public Task<bool> RemoveBFFHInstance(BFFHInstance instance)
+        {
+            if (_BFFHInstance_List == null)
+            {
+                GetBFFHInstances();
+            }
+
+            _BFFHInstance_List.RemoveAll(x => x.Address == instance.Address);
+
+            SaveList();
+
+            return Task.FromResult(true);
+        }
+
+        public Task<bool> RemoveAllBFFHInstances()
+        {
+            Preferences.Remove("bffhinstances");
+            _BFFHInstance_List.Clear();
+
+            return Task.FromResult(true);
+        }
+    }
+}
diff --git a/Borepin/Borepin/Service/ServerInstances/IBFFHInstanceService.cs b/Borepin/Borepin/Service/ServerInstances/IBFFHInstanceService.cs
new file mode 100644
index 0000000..f9678ff
--- /dev/null
+++ b/Borepin/Borepin/Service/ServerInstances/IBFFHInstanceService.cs
@@ -0,0 +1,18 @@
+using Borepin.Model;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Borepin.Service.ServerInstances
+{
+    public interface IBFFHInstanceService
+    {
+        Task<List<BFFHInstance>> GetBFFHInstances();
+
+        Task<bool> AddBFFHInstance(BFFHInstance instance);
+        Task<bool> UpdateBFFHInstance(BFFHInstance instance);
+
+        Task<bool> RemoveBFFHInstance(BFFHInstance instance);
+
+        Task<bool> RemoveAllBFFHInstances();
+    }
+}
diff --git a/Borepin/Borepin/View/HostView.xaml b/Borepin/Borepin/View/HostView.xaml
new file mode 100644
index 0000000..f7b8e71
--- /dev/null
+++ b/Borepin/Borepin/View/HostView.xaml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ContentView xmlns="http://xamarin.com/schemas/2014/forms" 
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Borepin.View.HostView">
+  <ContentView.Content>
+      <StackLayout>
+          <Label Text="Hello Xamarin.Forms!" />
+      </StackLayout>
+  </ContentView.Content>
+</ContentView>
\ No newline at end of file
diff --git a/Borepin/Borepin/View/HostView.xaml.cs b/Borepin/Borepin/View/HostView.xaml.cs
new file mode 100644
index 0000000..f44d443
--- /dev/null
+++ b/Borepin/Borepin/View/HostView.xaml.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace Borepin.View
+{
+    [XamlCompilation(XamlCompilationOptions.Compile)]
+    public partial class HostView : ContentView
+    {
+        public HostView()
+        {
+            InitializeComponent();
+        }
+    }
+}
\ No newline at end of file
diff --git a/Borepin/Borepin/ViewModel/HostViewModel.cs b/Borepin/Borepin/ViewModel/HostViewModel.cs
new file mode 100644
index 0000000..05ada16
--- /dev/null
+++ b/Borepin/Borepin/ViewModel/HostViewModel.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xamarin.Forms;
+
+namespace Borepin.ViewModel
+{
+    public class HostViewModel : BindableObject
+    {
+
+    }
+}