show a notification if window rules JSON invalid

package/contents/code/main.qml

@@ -1,5 +1,6 @@
 import QtQuick 2.15
 import org.kde.kwin 3.0
+import org.kde.notification 1.0
 import "./main.js" as Karousel
 
 Item {
@@ -16,4 +17,14 @@ Item {
         qmlBase.karouselInstance.destroy();
         print("script stopped");
     }
+
+    Notification {
+        id: notificationInvalidWindowRules
+        componentName: "plasma_workspace"
+        eventId: "notification"
+        title: "Karousel"
+        text: "Your Window Rules JSON is malformed, please review your Karousel configuration"
+        flags: Notification.Persistent
+        urgency: Notification.HighUrgency
+    }
 }

src/extern.d.ts

@@ -1,4 +1,5 @@
 declare const qmlBase;
+declare const notificationInvalidWindowRules;
 declare const console;
 declare const KWin;
 declare const Qt;

src/world/ClientManager.ts

@@ -15,6 +15,7 @@ class ClientManager {
         try {
             parsedWindowRules = JSON.parse(config.windowRules);
         } catch (error: any) {
+            notificationInvalidWindowRules.sendEvent();
             console.log("failed to parse windowRules:", error);
         }
         this.windowRuleEnforcer = new WindowRuleEnforcer(parsedWindowRules);