Add dialog box and check permissions

Checks if user if authorized if not message box poppes up

RMWPFUserInterface/RMWPFUserInterface.csproj

@@ -91,6 +91,7 @@
     <Compile Include="ViewModels\LoginViewModel.cs" />
     <Compile Include="ViewModels\SalesViewModel.cs" />
     <Compile Include="ViewModels\ShellViewModel.cs" />
+    <Compile Include="ViewModels\StatusInfoViewModel.cs" />
     <Compile Include="Views\LoginView.xaml.cs">
       <DependentUpon>LoginView.xaml</DependentUpon>
     </Compile>
@@ -104,6 +105,9 @@
       <DependentUpon>App.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="Views\StatusInfoView.xaml.cs">
+      <DependentUpon>StatusInfoView.xaml</DependentUpon>
+    </Compile>
     <Page Include="Views\LoginView.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -116,6 +120,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="Views\StatusInfoView.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs">

RMWPFUserInterface/ViewModels/SalesViewModel.cs

@@ -7,9 +7,11 @@ using RMWPFUserInterface.Models;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.Dynamic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Windows;
 
 namespace RMWPFUserInterface.ViewModels
 {
@@ -19,20 +21,47 @@ namespace RMWPFUserInterface.ViewModels
         IConfigHelper _configHelper;
         ISaleEndPoint _saleEndPoint;
         IMapper _mapper;
+        private readonly StatusInfoViewModel _status;
+        private readonly IWindowManager _window;
 
         public SalesViewModel(IProductEndPoint productEndPoint, IConfigHelper configHelper, 
-            ISaleEndPoint saleEndPoint, IMapper mapper)
+            ISaleEndPoint saleEndPoint, IMapper mapper, StatusInfoViewModel status, IWindowManager window)
         {
             _productEndPoint = productEndPoint;
             _configHelper = configHelper;
             _saleEndPoint = saleEndPoint;
             _mapper = mapper;
+            _status = status;
+            _window = window;
         }
 
         protected override async void OnViewLoaded(object view)
         {
             base.OnViewLoaded(view);
-            await LoadProducts();
+            try
+            {
+                await LoadProducts();
+            }
+            catch (Exception ex)
+            {
+                dynamic settings = new ExpandoObject();
+                settings.WindowStartUpLocation = WindowStartupLocation.CenterOwner;
+                settings.ResizeMode = ResizeMode.NoResize;
+                settings.Title = "System Error";
+
+                if (ex.Message == "Unauthorized")
+                {
+                    _status.UpdateMessage("Unauthorized Access", "You do not have permission to interact with Sales Form.");
+                    _window.ShowDialogAsync(_status, null, settings);
+                }
+                else
+                {
+                    _status.UpdateMessage("Fatal exception", ex.Message);
+                    _window.ShowDialogAsync(_status, null, settings);
+                }
+
+                TryCloseAsync();
+            }
         }
 
         private async Task LoadProducts()

RMWPFUserInterface/ViewModels/StatusInfoViewModel.cs

@@ -0,0 +1,28 @@
+using Caliburn.Micro;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RMWPFUserInterface.ViewModels
+{
+    public class StatusInfoViewModel : Screen
+    {
+        public string Header { get; private set; }
+        public string Message { get; private set; }
+        public void UpdateMessage(string header, string message)
+        {
+            Header = header;
+            Message = message;
+
+            NotifyOfPropertyChange(() => Header);
+            NotifyOfPropertyChange(() => Message);
+        }
+
+        public void Close()
+        {
+            TryCloseAsync();
+        }
+    }
+}

RMWPFUserInterface/Views/StatusInfoView.xaml

@@ -0,0 +1,16 @@
+<UserControl x:Class="RMWPFUserInterface.Views.StatusInfoView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:local="clr-namespace:RMWPFUserInterface.Views"
+             mc:Ignorable="d" 
+             d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <StackPanel Orientation="Vertical">
+            <TextBlock x:Name="Header" FontSize="20" FontWeight="Bold" Margin="10" />
+            <TextBlock x:Name="Message" FontSize="18" Margin="10" />
+            <Button x:Name="Close" Padding="10" Margin="20">Close</Button>
+        </StackPanel>
+    </Grid>
+</UserControl>

RMWPFUserInterface/Views/StatusInfoView.xaml.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace RMWPFUserInterface.Views
+{
+    /// <summary>
+    /// Interaction logic for StatusInfoView.xaml
+    /// </summary>
+    public partial class StatusInfoView : UserControl
+    {
+        public StatusInfoView()
+        {
+            InitializeComponent();
+        }
+    }
+}