fix: validating tcp name

internal/webhook/handlers/tcp_name.go

@@ -0,0 +1,40 @@
+// Copyright 2022 Clastix Labs
+// SPDX-License-Identifier: Apache-2.0
+
+package handlers
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"gomodules.xyz/jsonpatch/v2"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/validation"
+	"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
+
+	kamajiv1alpha1 "github.com/clastix/kamaji/api/v1alpha1"
+	"github.com/clastix/kamaji/internal/webhook/utils"
+)
+
+type TenantControlPlaneName struct{}
+
+func (t TenantControlPlaneName) OnCreate(object runtime.Object) AdmissionResponse {
+	return func(ctx context.Context, req admission.Request) ([]jsonpatch.JsonPatchOperation, error) {
+		tcp := object.(*kamajiv1alpha1.TenantControlPlane) //nolint:forcetypeassert
+
+		if errs := validation.IsDNS1035Label(tcp.Name); len(errs) > 0 {
+			return nil, fmt.Errorf("the provided name is invalid, %s", strings.Join(errs, ","))
+		}
+
+		return nil, nil
+	}
+}
+
+func (t TenantControlPlaneName) OnDelete(runtime.Object) AdmissionResponse {
+	return utils.NilOp()
+}
+
+func (t TenantControlPlaneName) OnUpdate(runtime.Object, runtime.Object) AdmissionResponse {
+	return utils.NilOp()
+}