actor

type Action ¶

type Action struct {
	Query   []StateQuery
	Perform *types.Command
}

Action is composed of a list of Queries and a Command to perform in case the AND composition of queries returns true

type MixedQuery ¶

type MixedQuery struct {
	Field    string
	Operator string
	Constant interface{}
}

MixedQuery compares an element of State.Current with a constant only if that element is different from the same in State.Previous

func (q *MixedQuery) Execute(state *State) (bool, error)

type State ¶

type State struct {
	Current  interface{}
	Previous interface{}
}

func (s *State) GetField(key string) (interface{}, error)

type StateQuery ¶

type StateQuery interface {
	Execute(state *State) (bool, error)
}

type StructQuery ¶

type StructQuery struct {
	FirstField  string
	Operator    string
	SecondField string
}

StructQuery compares two elements of the State oin every state change

func (q *StructQuery) Execute(state *State) (bool, error)