Add ingress feature to controller (#5)

Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>

internal/webhook/v1/nbroutingpeer_webhook.go

@@ -0,0 +1,76 @@
+package v1
+
+import (
+	"context"
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	logf "sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
+	"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
+
+	netbirdiov1 "github.com/netbirdio/kubernetes-operator/api/v1"
+	netbird "github.com/netbirdio/netbird/management/client/rest"
+)
+
+// nolint:unused
+// log is for logging in this package.
+var nbroutingpeerlog = logf.Log.WithName("nbroutingpeer-resource")
+
+// SetupNBRoutingPeerWebhookWithManager registers the webhook for NBRoutingPeer in the manager.
+func SetupNBRoutingPeerWebhookWithManager(mgr ctrl.Manager, managementURL, apiKey string) error {
+	return ctrl.NewWebhookManagedBy(mgr).For(&netbirdiov1.NBRoutingPeer{}).
+		WithValidator(&NBRoutingPeerCustomValidator{netbird: netbird.New(managementURL, apiKey), client: mgr.GetClient()}).
+		Complete()
+}
+
+// NBRoutingPeerCustomValidator struct is responsible for validating the NBRoutingPeer resource
+// when it is created, updated, or deleted.
+type NBRoutingPeerCustomValidator struct {
+	netbird *netbird.Client
+	client  client.Client
+}
+
+var _ webhook.CustomValidator = &NBRoutingPeerCustomValidator{}
+
+// ValidateCreate implements webhook.CustomValidator so a webhook will be registered for the type NBRoutingPeer.
+func (v *NBRoutingPeerCustomValidator) ValidateCreate(ctx context.Context, obj runtime.Object) (admission.Warnings, error) {
+	return nil, nil
+}
+
+// ValidateUpdate implements webhook.CustomValidator so a webhook will be registered for the type NBRoutingPeer.
+func (v *NBRoutingPeerCustomValidator) ValidateUpdate(ctx context.Context, oldObj, newObj runtime.Object) (admission.Warnings, error) {
+	return nil, nil
+}
+
+// ValidateDelete implements webhook.CustomValidator so a webhook will be registered for the type NBRoutingPeer.
+func (v *NBRoutingPeerCustomValidator) ValidateDelete(ctx context.Context, obj runtime.Object) (admission.Warnings, error) {
+	nbroutingpeer, ok := obj.(*netbirdiov1.NBRoutingPeer)
+	if !ok {
+		return nil, fmt.Errorf("expected a NBRoutingPeer object but got %T", obj)
+	}
+	nbroutingpeerlog.Info("Validation for NBRoutingPeer upon deletion", "name", nbroutingpeer.GetName())
+
+	if nbroutingpeer.Status.NetworkID == nil {
+		return nil, nil
+	}
+
+	var nbResources netbirdiov1.NBResourceList
+	err := v.client.List(ctx, &nbResources)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, r := range nbResources.Items {
+		if r.Spec.NetworkID == *nbroutingpeer.Status.NetworkID {
+			err = v.client.Delete(ctx, &r, client.DryRunAll)
+			if err != nil {
+				return nil, fmt.Errorf("%s/%s: %w", r.Namespace, r.Name, err)
+			}
+		}
+	}
+
+	return nil, nil
+}