Elevator saga engine http://play.elevatorsaga.com/

Readme.md

Elevator Saga program

My elevator control program for the elevator saga game.

Iterations

1. Listen to all button presses and play them back in order.

• Beat level 1.

2. Add going up / down indicators and drive all the way to the specific direction.

• Beat level 3.

3. Multiple elevators. Track idle elevators, send closest to pressed floor. Take passenger to destination.

• Beat level 5.

elevator.js

{
  init: function(elevators, floors) {
    var idleElevators = elevators.slice();
    var waitingPassengers = [];

    var sendNextIdleElevator = function () {
      if (idleElevators.length == 0) {
        return
      }
      if (waitingPassengers.length == 0) {
        return;
      }
      var closest, targetFloor;
      targetFloor = waitingPassengers.shift();
      closest = idleElevators.reduce(function (cur, elevator) {
        if (!cur) {
          return elevator;
        }
        if (Math.abs(cur.currentFloor() - targetFloor) < Math.abs(elevator.currentFloor() - targetFloor)) {
          return cur;
        } else {
          return elevator;
        }
      });
      closest.goToFloor(targetFloor);
      idleElevators = idleElevators.filter(function (e) { return e != closest; });
    };

    elevators.forEach(function (elevator, num) {
      elevator.on('floor_button_pressed', function (floorNumber) {
        elevator.goToFloor(floorNumber);
        if (idleElevators.indexOf(elevator) >= 0) {
          idleElevators = idleElevators.filter(function (e) { return e != elevator; });
        }
        console.log("Elevator", num, "going to floor", floorNumber);
      });

      elevator.on('stopped_at_floor', function (floorNumber) {
        console.log('Elevator', num ,'stopped at floor', floorNumber);
        waitingPassengers = waitingPassengers.filter(function (f) { return f != floorNumber; });
      });

      elevator.on('idle', function() {
        console.log('Elevator', num, 'idle');
        idleElevators.push(elevator);
        sendNextIdleElevator();
      });
    });

    floors.forEach(function (floor) {
      var floorNumber = floor.floorNum();
      floor.on('up_button_pressed', function () {
        console.log('Passenger at floor', floorNumber, 'wants to go up.');
        if (waitingPassengers.indexOf(floorNumber) < 0) {
          waitingPassengers.push(floorNumber);
        }
        sendNextIdleElevator();
      });
      floor.on('down_button_pressed', function () {
        console.log('Passenger at floor', floorNumber, 'wants to go down.');
        if (waitingPassengers.indexOf(floorNumber) < 0) {
          waitingPassengers.push(floorNumber);
        }
        sendNextIdleElevator();
      });
    });
  },
  update: function(dt, elevators, floors) {
    // We normally don't need to do anything here
  }
}