Ensure only a single instance of this app can be run at the same time

haefele · Oct 15, 2023 · abc7ef1 · abc7ef1
1 parent 7070542
commit abc7ef1
Show file tree

Hide file tree

Showing 3 changed files with 18 additions and 3 deletions.
diff --git a/src/ChatPrisma/App.xaml.cs b/src/ChatPrisma/App.xaml.cs
@@ -17,19 +17,25 @@
 using Onova;
 using Onova.Models;
 using Onova.Services;
+using SingleInstanceCore;
 
 namespace ChatPrisma;
 
-public partial class App
+public partial class App : ISingleInstance
 {
     private IHost? _host;
 
-    public new static App Current => (App)System.Windows.Application.Current;
-
     private async void App_OnStartup(object sender, StartupEventArgs e)
     {
         try
         {
+            // Allow only a single instance of this application to run at a time
+            if (SingleInstance.InitializeAsFirstInstance(this, "Chat Prisma") is false)
+            {
+                this.Shutdown();
+                return;
+            }
+
             this._host = this.CreateHostBuilder(e.Args).Build();
             await this._host.StartAsync();
 
@@ -54,6 +60,8 @@ private async void App_OnExit(object sender, ExitEventArgs e)
         {
             await this._host.StopAsync();
             this._host.Dispose();
+
+            SingleInstance.Cleanup();
         }
     }
 
@@ -63,6 +71,11 @@ private void App_OnDispatcherUnhandledException(object sender, DispatcherUnhandl
         logger?.LogError(e.Exception, "An unhandled exception occurred.");
     }
 
+    public void OnInstanceInvoked(string[] args)
+    {
+        // Right now we don't care about startup args
+    }
+
     private IHostBuilder CreateHostBuilder(string[] args) => Microsoft.Extensions.Hosting.Host
         .CreateDefaultBuilder(args)
         .ConfigureServices((context, services) =>

diff --git a/src/ChatPrisma/ChatPrisma.csproj b/src/ChatPrisma/ChatPrisma.csproj
@@ -20,6 +20,7 @@
         <PackageReference Include="NLog.Extensions.Hosting" Version="5.3.4" />
         <PackageReference Include="FluentIcons.WPF" Version="1.1.220" />
         <PackageReference Include="Onova" Version="2.6.10" />
+        <PackageReference Include="SingleInstanceCore" Version="2.2.2" />
     </ItemGroup>
 
     <ItemGroup Label="Versioning">

diff --git a/src/ChatPrisma/Views/About/AboutViewModel.cs b/src/ChatPrisma/Views/About/AboutViewModel.cs
@@ -35,6 +35,7 @@ public partial class AboutViewModel(IOptions<ApplicationOptions> options) : Obse
         new ThirdPartyLibrary("Emoji.Wpf",                            new("https://github.com/samhocevar/emoji.wpf"),                                      "WTFPL",        new Uri("https://github.com/samhocevar/emoji.wpf/blob/main/COPYING")),
         new ThirdPartyLibrary("DevExpress.Mvvm",                      new("https://github.com/DevExpress/DevExpress.Mvvm.Free"),                           "MIT",          new Uri("https://github.com/DevExpress/DevExpress.Mvvm.Free/blob/main/LICENSE")),
         new ThirdPartyLibrary("Nerdbank.GitVersioning",               new("https://github.com/dotnet/Nerdbank.GitVersioning"),                             "MIT",          new Uri("https://github.com/dotnet/Nerdbank.GitVersioning/blob/main/LICENSE")),
+        new ThirdPartyLibrary("SingleInstanceCore",                   new("https://github.com/soheilkd/SingleInstanceCore"),                               "MIT",          new Uri("https://github.com/soheilkd/SingleInstanceCore/blob/master/LICENSE")),
     };
 }