package.nix: fixed pname

package.nix

@@ -1,6 +1,26 @@
-{ lib, fetchFromGitHub, flutter319 }:
+{ lib
+, makeDesktopItem
+, copyDesktopItems
+, wrapGAppsHook3
+, fetchFromGitHub
+, flutter319
+}:
 
 let
+    desktopFile = makeDesktopItem rec {
+        name = "Invoice Ninja";
+        desktopName = name;
+        exec = "invoiceninja";
+        icon = "invoiceninja";
+        startupWMClass = "invoiceninja";
+        categories = [ "Office" ];
+        terminal = false;
+        extraConfig = {
+            X-MultipleArgs = "false";
+        };
+    };
+
+in flutter319.buildFlutterApplication rec {
   version = "5.0.172";
 
   src = fetchFromGitHub {
@@ -10,10 +30,7 @@ let
     hash = "sha256-yYGGmF0XiixDi/OuLdlKwN685BUsxcIFzIqXkJi4KMs=";
   };
 
-in flutter319.buildFlutterApplication {
+  pname = "invoiceninja-desktop";
-  inherit version src;
-
-  pname = "invoice-ninja-desktop";
 
   targetFlutterPlatform = "linux";
 
@@ -29,10 +46,22 @@ in flutter319.buildFlutterApplication {
     super_text_layout = "sha256-SGWTs2zHObYAC8J/LdtdmoDtI/EQZr0fJoYMpGcyGWE=";
   };
 
+  nativeBuildInputs = [
+    copyDesktopItems
+    wrapGAppsHook3
+  ];
+
   postUnpack = ''
     mv $sourceRoot/lib/.env.dart.example $sourceRoot/lib/.env.dart
   '';
 
+  postInstall = ''
+    mkdir -p $out/share/icons
+    mv $out/app/invoice-ninja-desktop/data/flutter_assets/assets/images/icon.png $out/share/icons/invoiceninja.png
+  '';
+
+  desktopItems = [ desktopFile ];
+
   meta = {
     description = "Invoice Ninja desktop client";
     homepage = "https://github.com/invoiceninja/admin-portal";