class RemoteControlWithUndo:
def __init__(self):
self.onCommands = [NoCommand()] * 7
self.offCommands = [NoCommand()] * 7
self.undoCommand = NoCommand()
def setCommand(self, slot, onCommand, offCommand):
# type: (int, Command, Command) -> None
assert isinstance(onCommand, Command)
assert isinstance(offCommand, Command)
self.onCommands[slot] = onCommand
self.offCommands[slot] = offCommand
def onButtonWasPushed(self, slot):
self.onCommands[slot].execute()
self.undoCommand = self.onCommands[slot]
def offButtonWasPushed(self, slot):
self.offCommands[slot].execute()
self.undoCommand = self.offCommands[slot]
def undoButtonWasPushed(self):
self.undoCommand.undo()
def __str__(self):
stringBuffer = "\n------- Remote Control -------\n"
index = 0
for command in self.onCommands:
stringBuffer += "[slot " + str(index) + "]" + command.__class__.__name__ + ",\t " + \
self.offCommands[index].__class__.__name__ + "\n"
index += 1
stringBuffer += "[undo]" + self.undoCommand.__class__.__name__ + "\n"
return stringBuffer
class RemoteControl():
SLOT_COUNT = 7
def __init__(self):
self.on_commands = []
self.off_commands = []
self.undo_command = NoCommand()
for i in range(0, RemoteControl.SLOT_COUNT):
self.on_commands.append(NoCommand())
self.off_commands.append(NoCommand())
def set_command(self, slot, on_command, off_command):
if slot >= RemoteControl.SLOT_COUNT:
print('Slot Range is 0 ~ 6')
return
self.on_commands[slot] = on_command
self.off_commands[slot] = off_command
def on_button_pushed(self, slot):
self.on_commands[slot].execute()
self.undo_command = self.on_commands[slot]
def off_button_pushed(self, slot):
self.off_commands[slot].execute()
self.undo_command = self.off_commands[slot]
def undo_button_pushed(self):
self.undo_command.undo()
def __init__(self):
self.on_commands = []
self.off_commands = []
self.undo_command = NoCommand()
for i in range(0, RemoteControl.SLOT_COUNT):
self.on_commands.append(NoCommand())
self.off_commands.append(NoCommand())
def __init__(self):
self.onCommands = []
self.offCommands = []
noCommand = NoCommand()
for i in range(7):
self.onCommands.append(noCommand)
self.offCommands.append(noCommand)
self.undoCommand = noCommand
from command import Command, NoCommand
no_command = NoCommand()
# NullObject pattern is here.
# It is used when we don't have anything to return
# and to remove the responsibility from the client to handle None value
class Remote:
def __init__(self, capacity):
self.capacity = capacity
self.on_commands: list[Command] = [
no_command for _ in range(0, self.capacity)
] # NullObject
self.off_commands: list[Command] = [
no_command for _ in range(0, self.capacity)
] # NullObject
self.recent_command: Command = no_command # NullObject
def set_command(self, position: int, on_command: Command,
off_command: Command):
self.on_commands[position] = on_command
self.off_commands[position] = off_command
def on_button_was_pushed(self, position: int):
self.on_commands[position].execute()
self.recent_command = self.on_commands[position]
def off_button_was_pushed(self, position: int):
self.off_commands[position].execute()
self.recent_command = self.off_commands[position]
def __init__(self):
self.onCommands = [NoCommand()] * 7
self.offCommands = [NoCommand()] * 7
self.undoCommand = NoCommand()