K8s: Add resource type helper to avoid so many hardcoded names (#79344)

pkg/apis/example/v0alpha1/types.go

@@ -2,6 +2,26 @@ package v0alpha1
 
 import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+
+	"github.com/grafana/grafana/pkg/apis"
+)
+
+const (
+	GROUP      = "example.grafana.app"
+	VERSION    = "v0alpha1"
+	APIVERSION = GROUP + "/" + VERSION
+)
+
+var RuntimeResourceInfo = apis.NewResourceInfo(GROUP, VERSION,
+	"runtime", "runtime", "RuntimeInfo",
+	func() runtime.Object { return &RuntimeInfo{} },
+	func() runtime.Object { return &RuntimeInfo{} },
+)
+var DummyResourceInfo = apis.NewResourceInfo(GROUP, VERSION,
+	"dummy", "dummy", "DummyResource",
+	func() runtime.Object { return &DummyResource{} },
+	func() runtime.Object { return &DummyResourceList{} },
 )
 
 // Mirrors the info exposed in "github.com/grafana/grafana/pkg/setting"

pkg/apis/playlist/v0alpha1/types.go

@@ -2,6 +2,21 @@ package v0alpha1
 
 import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+
+	"github.com/grafana/grafana/pkg/apis"
+)
+
+const (
+	GROUP      = "playlist.grafana.app"
+	VERSION    = "v0alpha1"
+	APIVERSION = GROUP + "/" + VERSION
+)
+
+var PlaylistResourceInfo = apis.NewResourceInfo(GROUP, VERSION,
+	"playlists", "playlist", "Playlist",
+	func() runtime.Object { return &Playlist{} },
+	func() runtime.Object { return &PlaylistList{} },
 )
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

pkg/apis/types.go

@@ -0,0 +1,87 @@
+package apis
+
+import (
+	"k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// ResourceInfo helps define a k8s resource
+type ResourceInfo struct {
+	group        string
+	version      string
+	resourceName string
+	singularName string
+	kind         string
+	newObj       func() runtime.Object
+	newList      func() runtime.Object
+}
+
+func NewResourceInfo(group, version, resourceName, singularName, kind string,
+	newObj func() runtime.Object, newList func() runtime.Object) ResourceInfo {
+	return ResourceInfo{group, version, resourceName, singularName, kind, newObj, newList}
+}
+
+func (info *ResourceInfo) GetSingularName() string {
+	return info.singularName
+}
+
+// TypeMeta returns k8s type
+func (info *ResourceInfo) TypeMeta() metav1.TypeMeta {
+	return metav1.TypeMeta{
+		Kind:       info.kind,
+		APIVersion: info.group + "/" + info.version,
+	}
+}
+
+func (info *ResourceInfo) GroupVersion() schema.GroupVersion {
+	return schema.GroupVersion{
+		Group:   info.group,
+		Version: info.version,
+	}
+}
+
+func (info *ResourceInfo) GroupResource() schema.GroupResource {
+	return schema.GroupResource{
+		Group:    info.group,
+		Resource: info.resourceName,
+	}
+}
+
+func (info *ResourceInfo) SingularGroupResource() schema.GroupResource {
+	return schema.GroupResource{
+		Group:    info.group,
+		Resource: info.singularName,
+	}
+}
+
+func (info *ResourceInfo) GroupVersionResource() schema.GroupVersionResource {
+	return schema.GroupVersionResource{
+		Group:    info.group,
+		Version:  info.version,
+		Resource: info.resourceName,
+	}
+}
+
+func (info *ResourceInfo) StoragePath(sub ...string) string {
+	switch len(sub) {
+	case 0:
+		return info.resourceName
+	case 1:
+		return info.resourceName + "/" + sub[0]
+	}
+	panic("invalid subresource path")
+}
+
+func (info *ResourceInfo) NewFunc() runtime.Object {
+	return info.newObj()
+}
+
+func (info *ResourceInfo) NewListFunc() runtime.Object {
+	return info.newList()
+}
+
+func (info *ResourceInfo) NewNotFound(name string) *errors.StatusError {
+	return errors.NewNotFound(info.SingularGroupResource(), name)
+}