http://play.elevatorsaga.com Chalenge

elevator.js

{
    init: function(elevators, floors) {
        Array.prototype.getMaxValue = function() {
            return Math.max.apply(null, this);
        };
        Array.prototype.getMinValue = function() {
            return Math.min.apply(null, this);
        };
        Array.prototype.removeValue = function(what) {
            while ((ax = this.indexOf(what)) !== -1) {
                this.splice(ax, 1);
            }
            return this;
        };
        Array.prototype.addValue = function(what) {
            if (!this.hasValue(what)) {
                this.push(what);
            }
        };
        Array.prototype.hasValue = function(what) {
            return this.indexOf(what) != -1;
        };
        Array.prototype.sortByInteger = function() {
            return this.sort(function (a, b) {
                if (a < b)
                    return -1;
                if (a > b)
                    return 1;
                return 0;
            })
        };
        var floorsThatWantUp = [];
        var floorsThatWantDown = [];
        elevators[0].goToFloor(100);
        for (elevatorId in elevators) {
            elevator = elevators[elevatorId];
            if (typeof elevator != 'object') {
                continue;
            }
            elevator.reordQueue = function (floor)  {
                this.destinationQueue.sortByInteger();
                if (this.goingDownIndicator()) {
                    this.destinationQueue.reverse();
                }
                this.checkDestinationQueue();
            }
            elevator.addFloor = function(floor) {
                this.goToFloor(floor);
                this.reordQueue();
            }
            elevator.removeFloor = function(floor) {
                this.destinationQueue.removeValue(floor);
                this.checkDestinationQueue();
            }
            elevator.changeDirection = function (direction) {
                direction = typeof direction != "undefined" ? direction : this.goingDownIndicator();
                this.goingDownIndicator(!direction);
                this.goingUpIndicator(direction);
            }
            elevator.changeDirection(true);
            elevator.on("floor_button_pressed", function(floor) {
                this.addFloor(floor);
            });
            elevator.on("passing_floor", function(floor) {
                if (this.loadFactor() >= .8) {
                    return;
                }
                if (this.goingUpIndicator() && floorsThatWantUp.hasValue(floor)) {
                    this.goToFloor(floor, true);
                    floorsThatWantUp.removeValue(floor);
                }
                if (this.goingDownIndicator() && floorsThatWantDown.hasValue(floor)) {
                    this.goToFloor(floor, true);
                    floorsThatWantDown.removeValue(floor);
                }
            });
            elevator.on("stopped_at_floor", function(floor) {
                if (this.goingUpIndicator()) {
                    floorsThatWantUp.removeValue(floor);
                }
                if (this.goingDownIndicator()) {
                    floorsThatWantDown.removeValue(floor);
                }
                if (floor == 0) {
                    this.changeDirection(true);
                }
            });
            elevator.on("idle", function() {
                this.changeDirection(false);
                var highestWanted = floorsThatWantDown.getMaxValue();
                this.goToFloor(highestWanted ? highestWanted : 0);
                floorsThatWantDown.removeValue(highestWanted);
            });
        }
        for (floorId in floors) {
            floor = floors[floorId];
            if (typeof floor != 'object') {
                continue;
            }
            floor.on("up_button_pressed", function() {
                floorsThatWantUp.addValue(this.floorNum());
            });
            floor.on("down_button_pressed", function() {
                floorsThatWantDown.addValue(this.floorNum());
            });
        }
    },
    update: function(dt, elevators, floors) {
        // We normally don't need to do anything here
    }
}