/*
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 pod

import (
	apiv1 "k8s.io/api/core/v1"
)

// PreProcessor processes the pods before building patches.
type PreProcessor interface {
	Process(apiv1.Pod) (apiv1.Pod, error)
}

// NoopPreProcessor leaves pods unchanged when processing
type NoopPreProcessor struct{}

// Process leaves the pod unchanged
func (p *NoopPreProcessor) Process(pod apiv1.Pod) (apiv1.Pod, error) {
	return pod, nil
}

// NewDefaultPreProcessor creates a default PreProcessor
func NewDefaultPreProcessor() PreProcessor {
	return &NoopPreProcessor{}
}