move Pauser and Resumer from the factory

pkg/kubectl/polymorphichelpers/objectpauser.go

@@ -0,0 +1,46 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package polymorphichelpers
+
+import (
+	"errors"
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/kubernetes/pkg/api/legacyscheme"
+	"k8s.io/kubernetes/pkg/apis/extensions"
+)
+
+// Currently only supports Deployments.
+func defaultObjectPauser(obj runtime.Object) ([]byte, error) {
+	switch obj := obj.(type) {
+	case *extensions.Deployment:
+		if obj.Spec.Paused {
+			return nil, errors.New("is already paused")
+		}
+		obj.Spec.Paused = true
+		return runtime.Encode(internalVersionJSONEncoder(), obj)
+	default:
+		return nil, fmt.Errorf("pausing is not supported")
+	}
+}
+
+func internalVersionJSONEncoder() runtime.Encoder {
+	encoder := legacyscheme.Codecs.LegacyCodec(legacyscheme.Scheme.PrioritizedVersionsAllGroups()...)
+	return unstructured.JSONFallbackEncoder{Encoder: encoder}
+}