Fix RadioBrowser crashes if no internet connection

Views/MainWindow.xaml

@@ -117,7 +117,7 @@
                         <TextBlock x:Name="SnapcastText" Text="{x:Static properties:Resources.StartSnapcast}" Margin="5, 0, 0, 0"/>
                     </StackPanel>
                 </Button>
-                <Button x:Name="Radio" Padding="5, 2" HorizontalAlignment="Left" Click="Radios_Clicked"  Margin="5,0,10,0" Background="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" FocusVisualStyle="{x:Null}">
+                <Button x:Name="Radio" Padding="5, 2" HorizontalAlignment="Left" Click="Radios_Clicked"  Margin="5,0,10,0" Background="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" FocusVisualStyle="{x:Null}" IsEnabled="False">
                     <StackPanel Orientation="Horizontal">
                         <emoji:TextBlock Text="📻" Padding="0,0,0,2"/>
                         <TextBlock Text="{x:Static properties:Resources.Radios}" Margin="5, 0, 0, 0"/>

Views/MainWindow.xaml.cs

@@ -188,6 +188,11 @@ namespace unison
                 SnapcastText.Text = unison.Resources.Resources.StartSnapcast;
         }
 
+        public void OnRadioBrowserConnected()
+        {
+            Radio.IsEnabled = true;
+        }
+
         public void UpdateButton(ref Border border, bool b)
         {
             border.Style = b ? (Style)Resources["SelectedButton"] : (Style)Resources["UnselectedButton"];

Views/Radios.xaml.cs

@@ -59,9 +59,22 @@ namespace unison
         {
             InitializeComponent();
 
+            try
+            {
                 _radioBrowser = new RadioBrowserClient();
                 Initialize();
             }
+            catch (Exception e)
+            {
+                Debug.WriteLine("Exception while connecting to RadioBrowser: " + e.Message);
+                return;
+            }
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                MainWindow MainWin = (MainWindow)Application.Current.MainWindow;
+                MainWin.OnRadioBrowserConnected();
+            });
+        }
 
         public async void Initialize()
         {
@@ -84,6 +97,8 @@ namespace unison
         }
 
         public async Task SearchAdvanced(string name, string country, string tags)
+        {
+            try
             {
                 SearchStatus.Text = unison.Resources.Resources.Radio_Loading;
 
@@ -115,6 +130,11 @@ namespace unison
                 else
                     SearchStatus.Text = unison.Resources.Resources.Radio_NotFound;
             }
+            catch (Exception except)
+            {
+                Debug.WriteLine("Error on RadioBrowser search advanced: " + except.Message);
+            }
+        }
 
         private void FitToContent()
         {
@@ -147,10 +167,17 @@ namespace unison
         }
 
         private async void Search_Clicked(object sender, RoutedEventArgs e)
+        {
+            try
             {
                 CountryListItem a = (CountryListItem)CountryList.SelectedItem;
                 await SearchAdvanced(NameSearch.Text, a?.Name, TagSearch.Text);
             }
+            catch (Exception except)
+            {
+                Debug.WriteLine("Error on RadioBrowser search: " + except.Message);
+            }
+        }
 
         private void Reset_Clicked(object sender, RoutedEventArgs e)
         {