Appendix

Author: rebuild-123

README.md

@@ -20,6 +20,8 @@ chapter 13 (No code)
 [Appendix (collections)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/collections) 
 [Appendix (ducks)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/ducks) 
 [Appendix (iterenum)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/iterenum) 
+[Appendix (bridge)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/bridge) 
+[Appendix (builder)](https://github.com/rebuild-123/Python-Head-First-Design-Patterns/tree/main/builder) 
 
 ## Introduction 
 1. Translated from [Head-First-Design-Patterns](https://github.com/bethrobson/Head-First-Design-Patterns) (java) 

bridge/remote/Client.py

@@ -0,0 +1,27 @@
+from GenericRemote import GenericRemote
+from SpecialRemote import SpecialRemote
+from TVFactory import TVFactory
+
+
+class Client:
+ @staticmethod
+ def main(*args) -> None:
+ tvFactory: TVFactory = TVFactory()
+ remoteSony: SpecialRemote = SpecialRemote(tvFactory)
+ print("Connect your remote to the TV")
+ remoteSony.setTV("Sony")
+ remoteSony.on()
+ remoteSony.up()
+ remoteSony.down()
+ remoteSony.off()
+ 
+ remoteLG: GenericRemote = GenericRemote(tvFactory)
+ print("Connect your remote to the TV")
+ remoteLG.setTV("LG")
+ remoteLG.on()
+ remoteLG.nextChannel()
+ remoteLG.prevChannel()
+ remoteLG.off()
+ 
+if __name__ == "__main__":
+ Client.main()

bridge/remote/GenericRemote.py

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+from RemoteControl import RemoteControl
+from TVFactory import TVFactory
+
+
+class GenericRemote(RemoteControl):
+ def __init__(self, tvFactory: TVFactory):
+ super().__init__(tvFactory)
+ def nextChannel(self) -> None:
+ channel: int = self.getChannel()
+ self.setChannel(channel+1)
+ def prevChannel(self) -> None:
+ channel: int = self.getChannel()
+ self.setChannel(channel-1)

bridge/remote/LG.py

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+from TV import TV
+
+
+class LG(TV):
+ channel: int = 1
+ def on(self) -> None:
+ print("Turning on the LG TV")
+ def off(self) -> None:
+ print("Turning off the LG TV")
+ def tuneChannel(self, channel: int) -> None:
+ self.channel = channel
+ print(f"Set the LG TV Channel to {self.channel}")
+ def getChannel(self) -> int:
+ return self.channel

bridge/remote/RemoteControl.py

@@ -0,0 +1,24 @@
+from abc import ABC, abstractmethod
+
+from TV import TV
+from TVFactory import TVFactory
+
+
+class RemoteControl(ABC):
+ tv: TV
+ tvFactory: TVFactory
+ def __init__(self, tvFactory: TVFactory):
+ self.tvFactory = tvFactory
+ def on(self) -> None:
+ self.tv.on()
+ def off(self) -> None:
+ self.tv.off()
+ def setChannel(self, channel: int) -> None:
+ self.tv.tuneChannel(channel)
+ def getChannel(self) -> int:
+ return self.tv.getChannel()
+ def setTV(self, type_: str) -> None:
+ try:
+ self.tv = self.tvFactory.getTV(type_)
+ except Exception as e:
+ print(e)

bridge/remote/Sony.py

@@ -0,0 +1,14 @@
+from TV import TV
+
+
+class Sony(TV):
+ station: int = 0
+ def on(self) -> None:
+ print("Turning on the Sony TV")
+ def off(self) -> None:
+ print("Turning off the Sony TV");
+ def tuneChannel(self, channel: int) -> None:
+ self.station = channel
+ print(f"Set the Sony TV station to {self.station}")
+ def getChannel(self) -> int:
+ return self.station

bridge/remote/SpecialRemote.py

@@ -0,0 +1,13 @@
+from RemoteControl import RemoteControl
+from TVFactory import TVFactory
+
+
+class SpecialRemote(RemoteControl):
+ def __init__(self, tvFactory: TVFactory):
+ super().__init__(tvFactory)
+ def up(self) -> None:
+ channel: int = self.getChannel()
+ self.setChannel(channel+1)
+ def down(self) -> None:
+ channel: int = self.getChannel()
+ self.setChannel(channel-1)

bridge/remote/TV.py

@@ -0,0 +1,16 @@
+from abc import ABC, abstractmethod
+
+
+class TV(ABC):
+ @abstractmethod
+ def on(self) -> None:
+ pass
+ @abstractmethod
+ def off(self) -> None:
+ pass
+ @abstractmethod
+ def tuneChannel(self, channel: int) -> None:
+ pass
+ @abstractmethod
+ def getChannel(self) -> int:
+ pass

bridge/remote/TVFactory.py

@@ -0,0 +1,13 @@
+from LG import LG
+from Sony import Sony
+from TV import TV
+
+
+class TVFactory:
+ def getTV(self, type_: str) -> TV:
+ if type_ == 'LG':
+ return LG()
+ elif type_ == 'Sony':
+ return Sony()
+ else:
+ raise Exception("Invalid TV Type")

builder/house/GingerbreadHouseBuilder.py

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+from House import House
+from HouseBuilder import HouseBuilder
+from InteriorWall import InteriorWall
+from Roof import Roof
+from Wall import Wall
+from Window import Window
+
+
+class GingerbreadHouseBuilder(HouseBuilder):
+ numWalls: int = 4
+ numWindows: int = 4
+ windowMaterial: str = "Sugar"
+ wallMaterial: str = "Gingerbread and icing"
+ roofMaterial: str = "Twizzlers"
+ def __init__(self) -> None:
+ self.builderName = "Gingerbread House Builder"
+ self.setHouseType(self.HouseType.GINGERBREAD)
+ self.house.name = "Gingerbread House" # Not in the authors' code.
+ def addWalls(self) -> HouseBuilder:
+ # add exterior walls
+ for i in range(4):
+ print(f"Adding wall made out of {self.wallMaterial}")
+ self.house.addWall(Wall(self.wallMaterial))
+ return self
+ def addWindows(self) -> HouseBuilder:
+ for i in range(self.numWindows):
+ print(f"Adding window made out of {self.windowMaterial}")
+ self.house.addWindow(Window(self.windowMaterial))
+ return self
+ def addRoof(self) -> HouseBuilder:
+ self.house.addRoof(Roof(self.roofMaterial))
+ return self
+ def build(self) -> House:
+ print("Stick everything together with icing")
+ return self.house