package goap

// Interface for every struct that can be part of an ActivityPub object
type BaseApChain interface {
	// Get the next "object" in the chain (or self if last element in chain)
	// Though preferably the last element should always be a BaseObject
	// The 2nd parameter indicates whether the returned value is different from the one the function is called on
	// So true => Is a different object, false => is self
	GetSelfOrBase() (BaseApChain, bool)
	// Convert the chain to a map
	// Should include the rest of the chain (extend the map the underlying object returns)
	MarshalToMap() map[string]any
}

// Func used to add parsers for other attributes not yet included in the library
// It is expected that, on success, the function removes its key from the raw map
type UnmarshalFunc func(map[string]any, BaseApChain) (BaseApChain, error)

type EmptyBaseObject struct{}

func (e *EmptyBaseObject) GetSelfOrBase() (BaseApChain, bool) {
	return e, false
}

func (e *EmptyBaseObject) MarshalToMap() map[string]any {
	return map[string]any{}
}