//This function returns the next state for the elevator
func Nextstate(myip string, elevators []extra.Elevator, mystate string) (string, []Network.Request) {
if Elevator.GetElevObstructionSignal() {
Elevator.SetElevStopLamp(1)
return "ERROR", nil
} else if mystate == "ERROR" {
Elevator.SetElevStopLamp(0)
return "INIT", nil
}
stop := Stop(myip, mystate)
if len(stop) != 0 {
return "DOOR_OPEN", stop
}
next := Nextrequest(myip, elevators)
if Elevator.AtFloor() && next.Floor == Elevator.CurrentFloor() {
return "DOOR_OPEN", append(stop, next)
}
if next.Floor > Elevator.CurrentFloor() {
return "UP", nil
} else if next.Floor < Elevator.CurrentFloor() && next.Floor != 0 {
return "DOWN", nil
} else if Elevator.AtFloor() {
return "IDLE", nil
} else {
return mystate, nil
}
}
//This function return orders the elevator should stop for
func Stop(myip string, mystate string) []Network.Request {
var takerequest []Network.Request
requestlist := Network.GetRequestList()
for _, request := range requestlist {
if (request.Direction == Elevator.BUTTON_COMMAND && request.Source == myip) || (request.Direction == Elevator.BUTTON_CALL_UP && mystate == "UP") || (request.Direction == Elevator.BUTTON_CALL_DOWN && mystate == "DOWN") {
if request.Floor == Elevator.CurrentFloor() && Elevator.AtFloor() {
takerequest = append(takerequest, request)
}
}
}
return takerequest
}