grafana/pkg/registry/apis/datasource/connections.go

package datasource

import (
	"context"
	"fmt"

	"k8s.io/apimachinery/pkg/apis/meta/internalversion"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apiserver/pkg/endpoints/request"
	"k8s.io/apiserver/pkg/registry/rest"

	common "github.com/grafana/grafana/pkg/apis/common/v0alpha1"
	"github.com/grafana/grafana/pkg/apis/datasource/v0alpha1"
	"github.com/grafana/grafana/pkg/services/datasources"
	"github.com/grafana/grafana/pkg/services/grafana-apiserver/utils"
)

var (
	_ rest.Scoper               = (*connectionAccess)(nil)
	_ rest.SingularNameProvider = (*connectionAccess)(nil)
	_ rest.Getter               = (*connectionAccess)(nil)
	_ rest.Lister               = (*connectionAccess)(nil)
	_ rest.Storage              = (*connectionAccess)(nil)
)

type connectionAccess struct {
	resourceInfo   common.ResourceInfo
	tableConverter rest.TableConvertor
	builder        *DataSourceAPIBuilder
}

func (s *connectionAccess) New() runtime.Object {
	return s.resourceInfo.NewFunc()
}

func (s *connectionAccess) Destroy() {}

func (s *connectionAccess) NamespaceScoped() bool {
	return true
}

func (s *connectionAccess) GetSingularName() string {
	return s.resourceInfo.GetSingularName()
}

func (s *connectionAccess) ShortNames() []string {
	return s.resourceInfo.GetShortNames()
}

func (s *connectionAccess) NewList() runtime.Object {
	return s.resourceInfo.NewListFunc()
}

func (s *connectionAccess) ConvertToTable(ctx context.Context, object runtime.Object, tableOptions runtime.Object) (*metav1.Table, error) {
	return s.tableConverter.ConvertToTable(ctx, object, tableOptions)
}

func (s *connectionAccess) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
	ns := request.NamespaceValue(ctx)
	ds, err := s.builder.getDataSource(ctx, name)
	if err != nil {
		return nil, err
	}
	return s.asConnection(ds, ns)
}

func (s *connectionAccess) List(ctx context.Context, options *internalversion.ListOptions) (runtime.Object, error) {
	ns := request.NamespaceValue(ctx)
	if ns == "" {
		// require a namespace so we do not need to support reverse mappings (yet)
		return nil, fmt.Errorf("missing namespace in request URL")
	}
	result := &v0alpha1.DataSourceConnectionList{
		Items: []v0alpha1.DataSourceConnection{},
	}
	vals, err := s.builder.getDataSources(ctx)
	if err == nil {
		for _, ds := range vals {
			v, _ := s.asConnection(ds, ns)
			result.Items = append(result.Items, *v)
		}
	}
	return result, err
}

func (s *connectionAccess) asConnection(ds *datasources.DataSource, ns string) (*v0alpha1.DataSourceConnection, error) {
	v := &v0alpha1.DataSourceConnection{
		TypeMeta: s.resourceInfo.TypeMeta(),
		ObjectMeta: metav1.ObjectMeta{
			Name:              ds.UID,
			Namespace:         ns,
			CreationTimestamp: metav1.NewTime(ds.Created),
			ResourceVersion:   fmt.Sprintf("%d", ds.Updated.UnixMilli()),
		},
		Title: ds.Name,
	}
	v.UID = utils.CalculateClusterWideUID(v) // indicates if the value changed on the server
	meta, err := utils.MetaAccessor(v)
	if err != nil {
		meta.SetUpdatedTimestamp(&ds.Updated)
	}
	return v, err
}