Only register event listener when the service is configured

Also added helper methods for checking if the service is enabled / configured

src/GA4.php

@@ -90,13 +90,15 @@ class GA4
         'google_',
     ];
 
-    public function __construct()
+    public function isConfigured(): bool
     {
-        if (config('ga4-event-tracking.measurement_id') === null
-            || config('ga4-event-tracking.api_secret') === null
-        ) {
-            throw new \Exception('GA4 cannot be used without a Measurement ID and API Secret. Check your .env file or config/ga4-event-tracking.php.');
-        }
+        return config('ga4-event-tracking.measurement_id') !== null
+            && config('ga4-event-tracking.api_secret') !== null;
+    }
+
+    public function isEnabled(): bool
+    {
+        return $this->isConfigured() && config('ga4-event-tracking.is_enabled', true);
     }
 
     public function setClientId(string $clientId): static
@@ -155,10 +157,10 @@ public function sendEvent(array $eventData): array
      */
     public function sendEvents(array $events): array
     {
-        if (!config('ga4-event-tracking.is_enabled', true)) {
+        if (!$this->isEnabled()) {
             return [
                 'status' => false,
-                'message' => 'GA4 Event Tracking is disabled.',
+                'message' => 'GA4 Event Tracking is not configured.',
             ];
         }
 

src/ServiceProvider.php

@@ -8,6 +8,7 @@
 use DevPro\GA4EventTracking\Http\ClientIdSession;
 use DevPro\GA4EventTracking\Http\StoreClientIdInSession;
 use DevPro\GA4EventTracking\Listeners\DispatchAnalyticsJob;
+use GA4;
 use Illuminate\Support\Facades\Blade;
 use Illuminate\Support\Facades\Event;
 use Illuminate\Support\Facades\Route;
@@ -29,7 +30,13 @@ public function boot(): void
             $this->bootForConsole();
         }
 
-        Event::listen(ShouldBroadcastToAnalytics::class, DispatchAnalyticsJob::class);
+        // Only register the listener if the measurement_id and api_secret are set
+        // to avoid unnecessary overhead.
+        if (config('ga4-event-tracking.measurement_id') !== null
+            && !config('ga4-event-tracking.api_secret') !== null
+        ) {
+            Event::listen(ShouldBroadcastToAnalytics::class, DispatchAnalyticsJob::class);
+        }
 
         Blade::directive('sendGA4ClientID', function () {
             return "<?php echo view('ga4-event-tracking::sendClientID'); ?>";