Elevator Saga Take Two

elevator2.js

{
    init: function(elevators, floors) {
        var waiting_up = new Array(floors.length).fill(0);
        var waiting_down = new Array(floors.length).fill(0);

        function bestFloor(waiting) {
            var selected_floor = {num_waiting: 0, floor: 0};
            for(var floor = 0; floor < waiting.length; floor++) {
                var num_waiting = waiting[floor];
                if(num_waiting > 0 && num_waiting > selected_floor.num_waiting) {
                    selected_floor.floor = floor;
                    selected_floor.num_waiting = num_waiting;
                }
            }
            return selected_floor;
        }  

        function nextFloor(current) {
            var best_up = bestFloor(waiting_up);
            var best_down = bestFloor(waiting_down);
            console.log("best down = " + JSON.stringify(best_down) + " best up = " + JSON.stringify(best_up));
            if(best_down.num_waiting > best_up.num_waiting) {
                var floor = best_down.floor;
                waiting_down[floor] = 0;
                return floor;
            } else {
                var floor = best_up.floor;
                waiting_up[floor] = 0;
                return floor;
            }
        }  

        elevators.forEach(function(elevator) {
            elevator.on("idle", function() {
                var destinations = elevator.getPressedFloors()
                if(destinations.length > 0) {
                    destinations.forEach(function(d) {
                        elevator.goToFloor(d); 
                    });
                } else {
                    elevator.goToFloor(nextFloor(elevator.currentFloor()));               
                }     
            });          
        });
        floors.forEach(function(floor) {
            floor.on("up_button_pressed", function(f) {
                var n = f.floorNum();
                waiting_up[n] += 1;
                console.log("up queue:" + waiting_up);

            });
            floor.on("down_button_pressed", function(f) {
                var n = f.floorNum();
                waiting_down[n] += 1;
                console.log("down queue:" + waiting_down);
            });
        });                
    },
        update: function(dt, elevators, floors) {
            // We normally don't need to do anything here
        }
}

todo:

• pickup people on way to best floor if in same direction
• log elevator number and decision for each