Ken Elevator Interview

elevator.py

events:
  - floorReached, {floor=2}
  - buttonPressedInside, {floor=1}
  - buttonPressedOutside, {floor=3, 
                           direction=UP|DOWN}
  
def moveUp()
def moveDown()
def stop()
def doorOpen()
def doorClose()
def currentFloor()

int floorGoal = []
int OPEN_TIME = 5

def buttonPressedOutsideHandler(event):
  if event.floor > currentFloor():
    doorClose()
    floorGoal.append( event.floor )
    floorGoal.sort()
    moveUp()
  elif event.floor == currentFloor():
    doorOpen()
    sleep(OPEN_TIME)
    doorClose()
  else:
    doorClose()
    floorGoal.append( event.floor )
    floorGoal.sort()
    moveDown()
    
def floorReachedHandler(event):
  if not floorGoal:
    return
  if event.floor == floorGoal[0]:
    stop()
    doorOpen()
    sleep(OPEN_TIME)
    doorClose()
    floorGoal.pop()
    
def buttonPressedInsideHandler(event):
  doorClose()
  if event.floor > currentFloor():
    moveUp()
    floorGoal.append( event.floor )
  elif event.floor < currentFloor():
    moveDown()
    floorGoal.append( event.floor )
  else:
    doorOpen()
    sleep(OPEN_TIME)
    doorClose()

listen("floorReached", 
        floorReachedHandler)
listen("buttonPressedOutside",
        buttonPressedOutsideHandler)
listen("buttonPressedInside",
        buttonPressedInsideHandler)

# 20 minutes for part 1

# buttonPressedOutside(floor=3,direction="UP")
# buttonPressedOutside(floor=2,direction="DOWN")
# buttonPressedOutside(floor=5,direction="DOWN")
# floorReached(floor=2)

#41 minutes for part 2, but incomplete