grafana/pkg/registry/apis/scope/storage.go

package scope

import (
	"fmt"

	"k8s.io/apimachinery/pkg/fields"
	"k8s.io/apimachinery/pkg/labels"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apiserver/pkg/registry/generic"
	genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
	apistore "k8s.io/apiserver/pkg/storage"

	scope "github.com/grafana/grafana/pkg/apis/scope/v0alpha1"
	grafanaregistry "github.com/grafana/grafana/pkg/apiserver/registry/generic"
	grafanarest "github.com/grafana/grafana/pkg/apiserver/rest"
)

var _ grafanarest.Storage = (*storage)(nil)

type storage struct {
	*genericregistry.Store
}

func newScopeStorage(scheme *runtime.Scheme, optsGetter generic.RESTOptionsGetter) (*storage, error) {
	resourceInfo := scope.ScopeResourceInfo
	strategy := grafanaregistry.NewStrategy(scheme, resourceInfo.GroupVersion())
	store := &genericregistry.Store{
		NewFunc:                   resourceInfo.NewFunc,
		NewListFunc:               resourceInfo.NewListFunc,
		KeyRootFunc:               grafanaregistry.KeyRootFunc(resourceInfo.GroupResource()),
		KeyFunc:                   grafanaregistry.NamespaceKeyFunc(resourceInfo.GroupResource()),
		PredicateFunc:             Matcher,
		DefaultQualifiedResource:  resourceInfo.GroupResource(),
		SingularQualifiedResource: resourceInfo.SingularGroupResource(),
		TableConvertor:            resourceInfo.TableConverter(),
		CreateStrategy:            strategy,
		UpdateStrategy:            strategy,
		DeleteStrategy:            strategy,
	}
	options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: GetAttrs}
	if err := store.CompleteWithOptions(options); err != nil {
		return nil, err
	}
	return &storage{Store: store}, nil
}

func newScopeDashboardBindingStorage(scheme *runtime.Scheme, optsGetter generic.RESTOptionsGetter) (*storage, *grafanaregistry.StatusREST, error) {
	resourceInfo := scope.ScopeDashboardBindingResourceInfo
	strategy := grafanaregistry.NewStrategy(scheme, resourceInfo.GroupVersion())

	store := &genericregistry.Store{
		NewFunc:                   resourceInfo.NewFunc,
		NewListFunc:               resourceInfo.NewListFunc,
		KeyRootFunc:               grafanaregistry.KeyRootFunc(resourceInfo.GroupResource()),
		KeyFunc:                   grafanaregistry.NamespaceKeyFunc(resourceInfo.GroupResource()),
		PredicateFunc:             Matcher,
		DefaultQualifiedResource:  resourceInfo.GroupResource(),
		SingularQualifiedResource: resourceInfo.SingularGroupResource(),
		TableConvertor:            resourceInfo.TableConverter(),
		CreateStrategy:            strategy,
		UpdateStrategy:            strategy,
		DeleteStrategy:            strategy,
	}
	options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: GetAttrs}
	if err := store.CompleteWithOptions(options); err != nil {
		return nil, nil, err
	}

	statusStrategy := grafanaregistry.NewStatusStrategy(scheme, resourceInfo.GroupVersion())
	statusREST := grafanaregistry.NewStatusREST(store, statusStrategy)
	return &storage{Store: store}, statusREST, nil
}

func newScopeNodeStorage(scheme *runtime.Scheme, optsGetter generic.RESTOptionsGetter) (*storage, error) {
	resourceInfo := scope.ScopeNodeResourceInfo
	strategy := grafanaregistry.NewStrategy(scheme, resourceInfo.GroupVersion())

	store := &genericregistry.Store{
		NewFunc:                   resourceInfo.NewFunc,
		NewListFunc:               resourceInfo.NewListFunc,
		KeyRootFunc:               grafanaregistry.KeyRootFunc(resourceInfo.GroupResource()),
		KeyFunc:                   grafanaregistry.NamespaceKeyFunc(resourceInfo.GroupResource()),
		PredicateFunc:             Matcher,
		DefaultQualifiedResource:  resourceInfo.GroupResource(),
		SingularQualifiedResource: resourceInfo.SingularGroupResource(),
		TableConvertor:            resourceInfo.TableConverter(),
		CreateStrategy:            strategy,
		UpdateStrategy:            strategy,
		DeleteStrategy:            strategy,
	}
	options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: GetAttrs}
	if err := store.CompleteWithOptions(options); err != nil {
		return nil, err
	}
	return &storage{Store: store}, nil
}

func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
	if s, ok := obj.(*scope.Scope); ok {
		return labels.Set(s.Labels), SelectableScopeFields(s), nil
	}
	if s, ok := obj.(*scope.ScopeDashboardBinding); ok {
		return labels.Set(s.Labels), SelectableScopeDashboardBindingFields(s), nil
	}
	if s, ok := obj.(*scope.ScopeNode); ok {
		return labels.Set(s.Labels), SelectableScopeNodeFields(s), nil
	}
	return nil, nil, fmt.Errorf("not a scope or ScopeDashboardBinding object")
}

// Matcher returns a generic.SelectionPredicate that matches on label and field selectors.
func Matcher(label labels.Selector, field fields.Selector) apistore.SelectionPredicate {
	return apistore.SelectionPredicate{
		Label:    label,
		Field:    field,
		GetAttrs: GetAttrs,
	}
}

func SelectableScopeFields(obj *scope.Scope) fields.Set {
	return generic.MergeFieldsSets(generic.ObjectMetaFieldsSet(&obj.ObjectMeta, false), fields.Set{
		"spec.title": obj.Spec.Title,
	})
}

func SelectableScopeDashboardBindingFields(obj *scope.ScopeDashboardBinding) fields.Set {
	return generic.MergeFieldsSets(generic.ObjectMetaFieldsSet(&obj.ObjectMeta, false), fields.Set{
		"spec.scope": obj.Spec.Scope,
	})
}

func SelectableScopeNodeFields(obj *scope.ScopeNode) fields.Set {
	parentName := ""

	if obj != nil {
		parentName = obj.Spec.ParentName
	}

	return generic.MergeFieldsSets(generic.ObjectMetaFieldsSet(&obj.ObjectMeta, false), fields.Set{
		"spec.parentName": parentName,
	})
}