ContainerImage.Pinniped/internal/controllerlib/filter.go

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// Copyright 2020 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package controllerlib
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
)
type Filter interface {
Add(obj metav1.Object) bool
Update(oldObj, newObj metav1.Object) bool
Delete(obj metav1.Object) bool
Parent(obj metav1.Object) Key
}
var _ Filter = FilterFuncs{}
type ParentFunc func(obj metav1.Object) Key
type FilterFuncs struct {
ParentFunc ParentFunc
AddFunc func(obj metav1.Object) bool
UpdateFunc func(oldObj, newObj metav1.Object) bool
DeleteFunc func(obj metav1.Object) bool
}
func (f FilterFuncs) Parent(obj metav1.Object) Key {
if f.ParentFunc == nil {
return Key{
Namespace: obj.GetNamespace(),
Name: obj.GetName(),
}
}
return f.ParentFunc(obj)
}
func (f FilterFuncs) Add(obj metav1.Object) bool {
if f.AddFunc == nil {
return false
}
return f.AddFunc(obj)
}
func (f FilterFuncs) Update(oldObj, newObj metav1.Object) bool {
if f.UpdateFunc == nil {
return false
}
return f.UpdateFunc(oldObj, newObj)
}
func (f FilterFuncs) Delete(obj metav1.Object) bool {
if f.DeleteFunc == nil {
return false
}
return f.DeleteFunc(obj)
}
func FilterByNames(parentFunc ParentFunc, names ...string) Filter {
set := sets.NewString(names...)
has := func(obj metav1.Object) bool {
return set.Has(obj.GetName())
}
return FilterFuncs{
ParentFunc: parentFunc,
AddFunc: has,
UpdateFunc: func(oldObj, newObj metav1.Object) bool {
return has(newObj)
},
DeleteFunc: has,
}
}