Elevator Saga (play.elevatorsaga.com)

elevator_saga.js

{
    init: function(elevators, floors) {
        var closestToFloor = function (floor) {
            var elevator = null;
            var distance = 1000;

            console.log("Call to floor " + floor + "...");

            elevators.forEach(function (cur_elevator) {
                var cur_distance = Math.abs(cur_elevator.currentFloor() - floor);

                if (cur_distance >= distance) {
                    return;
                }

                distance = cur_distance;
                elevator = cur_elevator;
            });

            return elevator;
        };

        var travel = function(elevator, floor) {
            elevator.goToFloor(floor);

            var direction = elevator.destinationDirection();

            elevator.goingUpIndicator(direction != "down");
            elevator.goingDownIndicator(direction != "up");
        }

        elevators.forEach(function (elevator) {
            elevator.on("idle", function () {
                travel(elevator, 0);
            });

            elevator.on("floor_button_pressed", function (floor) {
                travel(elevator, floor);
            });
        });

        floors.forEach(function(floor) {
            floor.on("up_button_pressed", function () {
                var curFloor = floor.floorNum();
                var elevator = closestToFloor(curFloor);
                if (elevator !== null) {
                    travel(elevator, curFloor);
                }
            });

            floor.on("down_button_pressed", function () {
                var curFloor = floor.floorNum();
                var elevator = closestToFloor(curFloor);
                if (elevator !== null) {
                    travel(elevator, curFloor);
                }
            });
        });
    },

    update: function(dt, elevators, floors) {
        // We normally don't need to do anything here
    }
}