elevatorsaga.js

{
    init: function(elevators, floors) {
        const TOP_FLOOR = floors.length-1;
        
        var downFloors = [];
        var upFloors = [];
        
        function add_to_queue_sorted(elevator, floorNum) {
            elevator.destinationQueue.push(floorNum);
            elevator.destinationQueue = $.unique(elevator.destinationQueue);
            elevator.destinationQueue.sort((a, b) => a - b);
            if (elevator.goingDownIndicator()) {
                elevator.destinationQueue.reverse();
            }
            elevator.checkDestinationQueue();
        }
        
        function get_highest_waiting_floor() {
            var floorNum;
            if (upFloors.length > 0 && downFloors.length > 0) {
                if (upFloors[upFloors.length - 1] > downFloors[0]) {
                    floorNum = upFloors.pop();
                } else {
                    floorNum = downFloors.shift();
                }
            } else if (upFloors.length > 0 && downFloors.length === 0) {
                floorNum = upFloors.pop();
            } else if (upFloors.length === 0 && downFloors.length > 0) {
                floorNum = downFloors.shift();
            } else {
                floorNum = 0;
            }
            
            return floorNum;
        }
        
        function get_lowest_waiting_floor() {
            var floorNum;
            if (upFloors.length > 0 && downFloors.length > 0) {
                if (upFloors[0] < downFloors[downFloors.length - 1]) {
                    floorNum = upFloors.shift();
                } else {
                    floorNum = downFloors.pop();
                }
            } else if (upFloors.length > 0 && downFloors.length === 0) {
                floorNum = upFloors.shift();
            } else if (upFloors.length === 0 && downFloors.length > 0) {
                floorNum = downFloors.pop();
            } else {
                floorNum = 0;
            }

            return floorNum;
        }

        floors.forEach(function(floor) {
            floor.on("up_button_pressed", function() {
                upFloors.push(floor.floorNum());
                upFloors = $.unique(upFloors);
                upFloors.sort();
            });

            floor.on("down_button_pressed", function() {
                downFloors.push(floor.floorNum());
                downFloors = $.unique(downFloors);
                downFloors.sort();
                downFloors.reverse();
            });
        });
        
        elevators.forEach( function(elevator) {
            elevator.on("passing_floor", function(floorNum) {
                if (elevator.loadFactor === 1) {
                    return;
                }

                if (elevator.goingUpIndicator() && upFloors.includes(floorNum)) {
                    upFloors.splice(upFloors.indexOf(floorNum), 1);
                    add_to_queue_sorted(elevator, floorNum);
                }

                if (elevator.goingDownIndicator() && downFloors.includes(floorNum)) {
                    downFloors.splice(downFloors.indexOf(floorNum), 1);
                    add_to_queue_sorted(elevator, floorNum);
                }
            });
            
            elevator.on("floor_button_pressed", function(floorNum) {
                add_to_queue_sorted(elevator, floorNum); 
            });

            
            elevator.on("stopped_at_floor", function(floorNum) {
                if (floorNum === 0) {
                    elevator.goingUpIndicator(true);
                    elevator.goingDownIndicator(false);
                    add_to_queue_sorted(elevator, TOP_FLOOR);
                }

                if (floorNum === TOP_FLOOR) {
                    elevator.goingUpIndicator(false);
                    elevator.goingDownIndicator(true);
                    add_to_queue_sorted(elevator, 0);
                }
            });
            
            elevator.goingUpIndicator(true);
            elevator.goingDownIndicator(false);
        });
        
        elevators.slice(-1).forEach((e) => e.goToFloor(TOP_FLOOR));
    },
    update: function(dt, elevators, floors) {
        // We normally don't need to do anything here
    }
}