// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action Action) (runtime.Object, error) {
_, kind, err := mapper.VersionAndKindForResource(action.GetResource())
if err != nil {
return nil, fmt.Errorf("unrecognized action %s: %v", action.GetResource(), err)
}
// TODO: have mapper return a Kind for a subresource?
switch castAction := action.(type) {
case ListAction:
return o.Kind(kind+"List", "")
case GetAction:
return o.Kind(kind, castAction.GetName())
case DeleteAction:
return o.Kind(kind, castAction.GetName())
case CreateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return nil, err
}
return o.Kind(kind, meta.Name)
case UpdateAction:
meta, err := api.ObjectMetaFor(castAction.GetObject())
if err != nil {
return nil, err
}
return o.Kind(kind, meta.Name)
default:
return nil, fmt.Errorf("no reaction implemented for %s", action)
}
}
}
// ObjectReaction returns a ReactionFunc that takes a generic action string of the form
// <verb>-<resource> or <verb>-<subresource>-<resource> and attempts to return a runtime
// Object or error that matches the requested action. For instance, list-replicationControllers
// should attempt to return a list of replication controllers. This method delegates to the
// ObjectRetriever interface to satisfy retrieval of lists or retrieval of single items.
// TODO: add support for sub resources
func ObjectReaction(o ObjectRetriever, mapper meta.RESTMapper) ReactionFunc {
return func(action FakeAction) (runtime.Object, error) {
segments := strings.Split(action.Action, "-")
var verb, resource string
switch len(segments) {
case 3:
verb, _, resource = segments[0], segments[1], segments[2]
case 2:
verb, resource = segments[0], segments[1]
default:
return nil, fmt.Errorf("unrecognized action, need two or three segments <verb>-<resource> or <verb>-<subresource>-<resource>: %s", action.Action)
}
_, kind, err := mapper.VersionAndKindForResource(resource)
if err != nil {
return nil, fmt.Errorf("unrecognized action %s: %v", resource, err)
}
// TODO: have mapper return a Kind for a subresource?
switch verb {
case "list", "search":
return o.Kind(kind+"List", "")
case "get", "create", "update", "delete":
// TODO: handle sub resources
if s, ok := action.Value.(string); ok && action.Value != nil {
return o.Kind(kind, s)
}
return o.Kind(kind, "unknown")
default:
return nil, fmt.Errorf("no reaction implemented for %s", action.Action)
}
return nil, nil
}
}
// ResolveResource returns the resource type and name of the resourceString.
// If the resource string has no specified type, defaultResource will be returned.
func ResolveResource(defaultResource, resourceString string, mapper meta.RESTMapper) (string, string, error) {
if mapper == nil {
return "", "", errors.New("mapper cannot be nil")
}
var name string
parts := strings.Split(resourceString, "/")
switch len(parts) {
case 1:
name = parts[0]
case 2:
_, kind, err := mapper.VersionAndKindForResource(parts[0])
if err != nil {
return "", "", err
}
name = parts[1]
resource, _ := meta.KindToResource(kind, false)
return resource, name, nil
default:
return "", "", fmt.Errorf("invalid resource format: %s", resourceString)
}
return defaultResource, name, nil
}
