class ShipBoard(PrintableBoard):
"""A board to track a fleet of ships"""
def __init__(self, fleet):
super(ShipBoard, self).__init__()
self.fleet = fleet
self.grid = Grid()
self.recordedStrikes = set()
if type(fleet) is not Fleet:
raise Exception("Expected a Fleet of ships, and instead got: ", type(fleet))
for ship in fleet:
self.addShip(ship)
def addShip(self, ship):
for point in ship:
x, y = point.x, point.y
ok = self.grid.Put(x, y, ship)
if not ok:
raise Exception("Unable to place ship at", x, y, ". Grid contains", self.grid.Get(x, y))
"""True iff we've received a strike for every ship in the fleet.
"""
def IsFleetSunk(self):
for ship in self.fleet:
for point in ship:
if point not in self.recordedStrikes:
return False
return True
""" Receive a strike at the given coordinates:
Args:
x - a valid x coordinate
y - a valid y coordinate
Returns:
True iff the point corresponds to a hit ship.
"""
def RecordStrike(self, x, y):
strike = Point(x, y)
self.recordedStrikes.add(strike)
value = self.grid.Get(x, y)
return (value is not None)
def getPositionType(self, point):
isStrike = point in self.recordedStrikes
gridValue = self.grid.Get(point.x, point.y)
isShip = type(gridValue) == Ship
if isStrike and isShip:
return STRUCK_SHIP
elif isShip and not isStrike:
return SHIP
elif not isShip and isStrike:
return STRIKE
else:
return NONE
def test_Grid_Get(self):
g = Grid()
self.assertIsNone(g.Get(1, "A"))
self.assertTrue(g.Put(1, "A", "value"))
self.assertEqual("value", g.Get(1, "A"))