ShowErrorWindow now actually shows the ErrorWindow

PcgsInvUi/ViewModels/MainWindowViewModel.cs

@@ -41,12 +41,11 @@ public class MainWindowViewModel : ViewModelBase {
     public Interaction<DeleteWindowViewModel, Boolean> ShowDeleteWindow { get; }
     public ReactiveCommand<Unit, Unit> ExportCommand { get; }
     public Interaction<Unit, Uri> ShowExportWindow { get; }
-    public Interaction<Unit, Unit> ShowErrorWindow { get; }
+    public Interaction<ErrorWindowViewModel, Unit> ShowErrorWindow { get; }
 
     private ViewModelBase _sideContent;
     private Coin? _selectedCoin;
     private double _totalValue;
-    private PcgsClient _pcgsClient;
     
     public MainWindowViewModel(CoinDatabase coins) {
         ConnectedCoinDatabase = coins;
@@ -57,7 +56,7 @@ public class MainWindowViewModel : ViewModelBase {
         TotalValue = DisplayedList.Sum(x => x.TotalPrice);
         
         // Set up the ability to show the error window.
-        ShowErrorWindow = new Interaction<Unit, Unit>();
+        ShowErrorWindow = new Interaction<ErrorWindowViewModel, Unit>();
         
         // Set up the ability to open the delete window.
         ShowDeleteWindow = new Interaction<DeleteWindowViewModel, bool>();
@@ -84,8 +83,10 @@ public class MainWindowViewModel : ViewModelBase {
             catch (IOException e) {
                 // Something is wrong with the file after it's been created.
                 Console.WriteLine(e.Message);
+                ShowErrorWindow.Handle(new ErrorWindowViewModel(e.Message));
             } catch (Exception e) {
                 Console.WriteLine(e.Message);
+                ShowErrorWindow.Handle(new ErrorWindowViewModel(e.Message));
             }
         });
         
@@ -93,19 +94,29 @@ public class MainWindowViewModel : ViewModelBase {
         // This is the same as the above, but with a different syntax.
         newViewModel.OkCommand
             .Subscribe(async requestStructure => {
-                try {
-                    ConnectedCoinDatabase.CreateCoin(requestStructure.Item1, requestStructure.Item2,
-                        requestStructure.Item3);
-                }
-                catch (Exception e) {
-                    // TODO Error handling - create a popup window.
-                    Console.WriteLine(e.Message);
+                var result = await ConnectedCoinDatabase.CreateCoin(requestStructure.Item1, requestStructure.Item2,
+                    requestStructure.Item3);
+                
+                switch (result) {
+                    case PcgsClient.ErrorType.ApiKeyInvalid:
+                        Console.WriteLine("API key is invalid - showing window.");
+                        await ShowErrorWindow.Handle(new ErrorWindowViewModel("API key is invalid - authorization failed."));
+                        break;
+                    case PcgsClient.ErrorType.InvalidRequestFormat:
+                        Console.WriteLine("Request format is invalid - showing window.");
+                        await ShowErrorWindow.Handle(new ErrorWindowViewModel("Request format is invalid."));
+                        break;
+                    case PcgsClient.ErrorType.NoCoinFound:
+                        Console.WriteLine("No coin was found with the given parameters.");
+                        await ShowErrorWindow.Handle(new ErrorWindowViewModel("No coin was found with the given parameters."));
+                        break;
                 }
+                
                 // TODO Clear the text boxes.
             });
 
         // Change TotalValue anytime SelectedCoin.TotalPrice changes.
-        // Possible null deref - ignored due to null values summing to 0.
+        // Possible null deref - how do you remove this?
         this.WhenAnyValue(x => x.SelectedCoin.TotalPrice)
             .Subscribe(_ => TotalValue = ConnectedCoinDatabase.Collection.Sum(x => x.TotalPrice));
     }