elevator_saga.js

{
    init: function (elevators, floors) {
        const floor_up_pressed = {};
        const floor_down_pressed = {};
        
        floors.forEach(floor => {
            const f = floor;
            f.on('up_button_pressed', () => {
                floor_up_pressed[f.floorNum()] = true;
            });
            f.on('down_button_pressed', () => {
                floor_down_pressed[f.floorNum()] = true;
            });
        });
        
        elevators.forEach((elevator, id) => {
            const e = elevator;
            e.restFloor = Math.floor(floors.length / elevators.length * id);
            e.dir = 1;
            e.floor_pressed = {};
            
            e.on('floor_button_pressed', fn => {
                e.floor_pressed[fn] = true;
            });
            
            e.on('idle', () => {
                if (e.currentFloor() === floors.length - 1) {
                    e.dir = -1;
                } else if (e.currentFloor() === 0) {
                    e.dir = 1;
                }
                
                let targetFloor = null;
                if (e.dir < 0) {
                    for (let i = e.currentFloor() - 1; i >= 0; i--) {
                        if (floor_down_pressed[i] || e.floor_pressed[i]) {
                            targetFloor = i;
                            break;
                        }
                    }
                    if (targetFloor == null) {
                        for (let i = 0; i < floors.length; i++) {
                            if (floor_up_pressed[i]) {
                                targetFloor = i;
                                e.dir = 1;
                                break;
                            }
                        }
                    }
                } else if (e.dir > 0) {
                    for (let i = e.currentFloor() + 1; i < floors.length; i++) {
                        if (floor_up_pressed[i] || e.floor_pressed[i]) {
                            targetFloor = i;
                            break;
                        }
                    }
                    if (targetFloor == null) {
                        for (let i = floors.length - 1; i >= 0; i--) {
                            if (floor_down_pressed[i]) {
                                targetFloor = i;
                                e.dir = -1;
                                break;
                            }
                        }
                    }
                }
                
                if (targetFloor == null) {
                    targetFloor = e.restFloor;
                }
                
                floor_down_pressed[targetFloor] = false;
                floor_up_pressed[targetFloor] = false;
                e.floor_pressed[targetFloor] = false;
                
                e.goToFloor(targetFloor);
            });
        });
    },
    update: function (dt, elevators, floors) {},
}