Added Design Patterns

Author: MitkoVtori

OOP/B.Design Patterns/# TODO.txt

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+from abc import ABC, abstractmethod
+
+
+class AbstractFactory(ABC):
+    @abstractmethod
+    def create_chair(self):
+        raise NotImplementedError()
+
+    @abstractmethod
+    def create_sofa(self):
+        raise NotImplementedError()
+
+    @abstractmethod
+    def create_table(self):
+        raise NotImplementedError()
+
+
+class Chair:
+
+    def __init__(self, name):
+        self._name = name
+
+    def __str__(self):
+        return self._name
+
+
+class Sofa:
+
+    def __init__(self, name):
+        self._name = name
+
+    def __str__(self):
+        return self._name
+
+
+class Table:
+
+    def __init__(self, name):
+        self._name = name
+
+    def __str__(self):
+        return self._name
+
+
+class VictorianFactory(AbstractFactory):
+
+    def create_chair(self):
+        return Chair("victorian chair")
+
+    def create_sofa(self):
+        return Sofa("victorian sofa")
+
+    def create_table(self):
+        return Table("victorian table")
+
+
+class ModernFactory(AbstractFactory):
+
+    def create_chair(self):
+        return Chair("modern chair")
+
+    def create_sofa(self):
+        return Sofa("modern sofa")
+
+    def create_table(self):
+        return Table("modern table")
+
+
+class FuturisticFactory(AbstractFactory):
+
+    def create_chair(self):
+        return Chair("futuristic chair")
+
+    def create_sofa(self):
+        return Sofa("futuristic sofa")
+
+    def create_table(self):
+        return Table("futuristic table")
+

OOP/B.Design Patterns/01. Abstract Factory.py

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+class Component:
+
+    def __init__(self, name):
+        self.name = name
+        self.parent = None
+
+    def move(self, new_path):
+        new_folder = get_path(new_path)
+        del self.parent.children[self.name]
+        new_folder.children[self.name] = self
+        self.parent = new_folder
+
+    def delete(self):
+        del self.parent.children[self.name]
+
+
+class Folder(Component):
+
+    def __init__(self, name):
+        super().__init__(name)
+        self.children = {}
+
+    def add_child(self, child):
+        self.parent = self
+        self.children[child.name] = child
+
+
+class File(Component):
+
+    def __init__(self, name, contents):
+        super().__init__(name)
+        self.contents = contents
+
+
+root = Folder('')
+
+def get_path(path):
+    names = path.split('/')[1:]
+    node = root
+    for name in names:
+        node = node.children[name]
+    return node
+

OOP/B.Design Patterns/02. Composite.py

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+import sys
+
+
+class Window:
+
+    def exit(self):
+        sys.exit(0)
+
+
+class Document:
+
+    def __init__(self, filename):
+        self.filename = filename
+        self.contents = "This file cannot be modified"
+
+    def save(self):
+        with open(self.filename, "w") as file:
+            file.write(self.contents)
+
+
+class ToolbarDocument:
+
+    def __init__(self, name, iconname):
+        self.name = name
+        self.iconname = iconname
+
+    def click(self):
+        self.command.execute()
+
+
+class MenuItem:
+
+    def __init__(self, menu_name, item_name):
+        self.menu = menu_name
+        self.item = item_name
+
+    def click(self):
+        self.command.execute()
+
+
+class KeyboardShortcut:
+
+    def __init__(self, key, modifier):
+        self.key = key
+        self.modifier = modifier
+
+    def keypress(self):
+        self.command.execute()
+
+
+class SaveCommand:
+
+    def __init__(self, document):
+        self.document = document
+
+    def execute(self):
+        self.document.save()
+
+
+class ExitCommand:
+
+    def __init__(self, window):
+        self.window = window
+
+    def execute(self):
+        self.window.exit()
+
+