Elevatorsaga

gistfile1.js

{
    init: function(elevators, floors) {
        var queue = [];
        elevators.forEach(function (elevator) {
            elevator.on("idle", function() {
                // If there is a floor in the queue, go there.
                if (queue.length > 0) {
                    var floor = queue.shift();
                    goToFloor(elevator, floor);
                }
                else {
                    // Turn our lights on. We can go anywhere!
                    elevator.goingUpIndicator(true);
                    elevator.goingDownIndicator(true);
                    // If we remain stationary people don't get on unless we "go to our own floor".
                    // Presumably this causes the doors to open.
                    elevator.goToFloor(0);
                }
            });

            elevator.on('floor_button_pressed', function (floor) {             
                goToFloor(elevator, floor);
            });
            
            elevator.on('stopped_at_floor', function(floor) {
                // If we stop and are empty, turn our lights back on.
                if (elevator.loadFactor() == 0) {
                    elevator.goingUpIndicator(true);
                    elevator.goingDownIndicator(true);
                }
            });
        });
        
        floors.forEach(function(floor) {
            floor.on('up_button_pressed', function() {
                queue.push(floor.floorNum());
            });
            floor.on('down_button_pressed', function() {
                queue.push(floor.floorNum());
            });
        });

        var goToFloor = function(elevator, floor) {
            if (floor > elevator.currentFloor()) {
                elevator.goingDownIndicator(false);
                elevator.goingUpIndicator(true);
            }
            else {
                elevator.goingDownIndicator(true);
                elevator.goingUpIndicator(false);
            }
            elevator.goToFloor(floor);
        }
    },
    update: function(dt, elevators, floors) {
        // We normally don't need to do anything here
    }
}