working on patterns

Author: Joshua Goller

patterns/creational/abstract_factory.py

@@ -0,0 +1,84 @@
+class MazeGame():
+    def create_maze(self):
+        maze = Maze()
+        room1 = Room(1)
+        room2 = Room(2)
+        door = Door(room1, room2)
+
+        room1.set_side('N', Wall())
+        room1.set_side('E', door)
+        room1.set_side('S', Wall())
+        room1.set_side('W', Wall())
+
+        room1.set_side('N', Wall())
+        room1.set_side('E', Wall())
+        room1.set_side('S', Wall())
+        room2.set_side('W', door)
+
+        maze.add_room(Room(1))
+        maze.add_room(Room(2))
+
+
+class Maze():
+    def __init__(self):
+        self.rooms = {}
+
+    def add_room(self, room):
+        self.rooms[room.room_no] = room
+
+    def room_no(self, no):
+        return self.rooms[no]
+
+
+class MapSite():
+    def enter(self):
+        raise NotImplementedError
+
+
+class Room(MapSite):
+    def __init__(self, room_no):
+        self.room_no = room_no
+        self.sides = {'N': None,
+                      'E': None,
+                      'S': None,
+                      'W': None}
+
+    def enter(self):
+        print("Now standing room {0}".format(self.room_no))
+        return
+
+    def set_side(self, side, target):
+        if side not in self.sides:
+            raise ValueError
+        self.sides[side] = target
+
+    def get_side(self, side):
+        if side not in self.sides:
+            raise ValueError
+        return self.sides[side]
+
+
+class Wall(MapSite):
+    def enter(self):
+        print("Ouch, my nose! I hit a wall.")
+        return
+
+
+class Door(MapSite):
+    def __init__(self, room1=None, room2=None):
+        self.room1 = room1
+        self.room2 = room2
+        self.is_open = False
+
+    def enter(self):
+        if self.is_open:
+            print("Passing through a door...")
+        else:
+            print("Ouch! I banged my nose on a door. :(")
+        return
+
+    def other_side_from(self, side):
+        if side not in [self.room1, self.room2]:
+            raise ValueError
+        else:
+            return self.room1 if side == self.room2 else self.room2