Start webhook implementation

Observer/ConfigChangeObserver.php

@@ -52,6 +52,7 @@ class ConfigChangeObserver implements ObserverInterface
     {
         $changedPaths = $observer->getEvent()->getData('changed_paths');
 
+        // Test for rates at checkout
         if (is_array($changedPaths) && in_array('carriers/bobgo/active', $changedPaths)) {
             if ($this->bobGo->isActive()) {
                 $result = $this->bobGo->triggerRatesTest();
@@ -70,5 +71,23 @@ class ConfigChangeObserver implements ObserverInterface
                 }
             }
         }
+
+        // Test for webhooks
+        if ((is_array($changedPaths) && in_array('carriers/bobgo/enable_webhooks', $changedPaths)) || (is_array($changedPaths) && in_array('carriers/bobgo/webhook_key', $changedPaths))) {
+            $result = $this->bobGo->triggerWebhookTest();
+
+            if ($this->bobGo->isWebhookEnabled()) {
+                if ($result) {
+                    $this->messageManager->addSuccessMessage(
+                        __('Webhook validation successful.')
+                    );
+                } else {
+                    $this->messageManager->addErrorMessage(
+                        __('Webhook validation failed. Please check your internet connection
+                        and use your Bob Go integration consumer secret key for webhook validation.')
+                    );
+                }
+            }
+        }
     }
 }