/
utils.go
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/
utils.go
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// Copyright 2022 OnMetal 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 utils
import (
"context"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime/schema"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type ObjectPtr[E any] interface {
*E
client.Object
}
func ObjectSliceToMapByName[S ~[]E, ObjPtr ObjectPtr[E], E any](objs S) map[string]ObjPtr {
res := make(map[string]ObjPtr)
for i := range objs {
obj := ObjPtr(&objs[i])
res[obj.GetName()] = obj
}
return res
}
func ObjectByNameGetter[Obj client.Object](resource schema.GroupResource, objectByName map[string]Obj) func(name string) (Obj, error) {
return func(name string) (Obj, error) {
object, ok := objectByName[name]
if !ok {
var zero Obj
return zero, apierrors.NewNotFound(resource, name)
}
return object, nil
}
}
func ObjectSliceToByNameGetter[S ~[]E, ObjPtr ObjectPtr[E], E any](resource schema.GroupResource, objs S) func(name string) (ObjPtr, error) {
objectByName := ObjectSliceToMapByName[S, ObjPtr](objs)
return ObjectByNameGetter(resource, objectByName)
}
func ClientObjectGetter[ObjPtr ObjectPtr[Obj], Obj any](
ctx context.Context,
c client.Client,
namespace string,
) func(name string) (ObjPtr, error) {
return func(name string) (ObjPtr, error) {
objPtr := ObjPtr(new(Obj))
if err := c.Get(ctx, client.ObjectKey{Namespace: namespace, Name: name}, objPtr); err != nil {
return nil, err
}
return objPtr, nil
}
}