Fire Event function

main.go

func (s *StateMachine) FireEvent(e Event) error {
	presentNode := s.PresentState

	it := s.g.From(presentNode.Id)

	for it.Next() {
		n := s.g.Node(it.Node().ID()).(State)
		line := graph.LinesOf(s.g.Lines(presentNode.Id, n.Id))[0].(Link) // There can be one defined path between two distinct states

		for key, val := range line.Rules {
			k := string(key)
			switch k {
			case "eq":
				if val == e {
					s.PresentState = n
					return nil
				}
			default:
				fmt.Printf("Sorry, the comparison operator '%s' is not supported\n", k)
				return errors.New("UNSUPPORTED_COMPARISON_OPERATOR")
			}
		}
	}
	return nil
}