//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
}
// Nextrequest will provide the best elevator for each request, using the three above functions
func Nextrequest(localip string, Elevatorlist []extra.Elevator) Network.Request {
var statelist = make(map[string]Network.Info)
infolist := Network.GetInfoList()
for host, info := range infolist {
statelist[host] = info
}
requestlist := Network.GetRequestList()
loop:
for _, request := range requestlist {
if !InternalOrExternal(request) {
go Externalrequest(localip, Elevatorlist, request)
return externalrequest
continue loop
} else {
go Internalrequest(localip, Elevatorlist, request)
return internalrequest
continue loop
}
}
return Network.NoRequest[0]
}
//This function does a BFS-search through all orders to find the most effective solution
func Nextrequest(myip string, Elevatorlist []misc.Elevator) Network.Request {
var statelist = make(map[string]Network.Info)
infolist := Network.GetInfoList()
for host, info := range infolist {
statelist[host] = info
}
requestlist := Network.GetRequestList()
insideloop:
for _, request := range requestlist {
if request.Direction != Elevator.BUTTON_COMMAND {
continue insideloop
}
for _, elevator := range Elevatorlist {
if info, ok := statelist[Elevator.Address]; ok {
if ((info.State == "UP" || info.State == "IDLE") && info.LastFloor <= request.Floor) || ((info.State == "DOWN" || info.State == "IDLE") && info.LastFloor >= request.Floor) {
if info.Source == request.Source {
if info.Source == myip {
return request
} else {
delete(statelist, Elevator.Address)
continue insideloop
}
}
}
}
}
for _, elevator := range Elevatorlist {
if info, ok := statelist[Elevator.Address]; ok {
if (info.State == "UP" && info.LastFloor >= request.Floor) || (info.State == "DOWN" && info.LastFloor <= request.Floor) {
if info.Source == request.Source {
if info.Source == myip {
return request
} else {
delete(statelist, Elevator.Address)
continue insideloop
}
}
}
}
}
}
requestloop:
for _, request := range requestlist {
if request.Direction == Elevator.BUTTON_COMMAND {
continue requestloop
}
for i := 0; i < Elevator.N_FLOORS; i++ {
for _, elevator := range Elevatorlist {
if info, ok := statelist[Elevator.Address]; ok {
if i != 0 && (info.State == "UP" && info.LastFloor+i == request.Floor) || (info.State == "DOWN" && info.LastFloor-i == request.Floor) {
if statelist[Elevator.Address].Source == myip {
return request
} else {
delete(statelist, Elevator.Address)
continue requestloop
}
}
}
}
for _, elevator := range Elevatorlist {
if info, ok := statelist[Elevator.Address]; ok {
if info.State == "IDLE" && (info.LastFloor == request.Floor+i || info.LastFloor == request.Floor-i) {
if statelist[Elevator.Address].Source == myip {
return request
} else {
delete(statelist, Elevator.Address)
continue requestloop
}
}
}
}
}
}
return Network.EmptyRequest[0]
}