Introduced Abstract Base Classes

Introduced Abstract Base Classes to ease the process of adding another platform.

Also some minor documentation.

main.py

@@ -2,33 +2,55 @@
 """Main asteroid-automator script."""
 
 import platform
+from abc import ABC, abstractmethod
+
+import pyautogui
 
 PLATFORM_SYS = platform.system()
 
 if PLATFORM_SYS == "Windows":
     import d3dshot
-elif PLATFORM_SYS == "Linux":
-    import pyautogui
 
 
-class AutomatableGame:
+class AbstractAutomatableGame(ABC):
     """Base class for each platform."""
 
+    @abstractmethod
     def __init__(self):
+        """Initializes components needed for the I/O to operate."""
         self.loc = pyautogui.locateOnScreen("images/app.png")
 
+    @abstractmethod
     def fetch_sshot(self):
         """Creates a screenshot, and returns it in Pillow format."""
         return pyautogui.screenshot(region=self.loc)
 
-    def send_key(self, key):
+    @abstractmethod
+    def send_key(self, key: str):
+        """Presses a key on a virtual keyboard."""
         pass
 
 
-class AutomatableGame__Windows(AutomatableGame):
+class AutomatableGame__Windows(AbstractAutomatableGame):
     def __init__(self):
         super().__init__(self)
         self.d = d3dshot.create()
 
     def fetch_sshot(self):
         return self.d.screenshot()  # TODO: Cut this to self.loc(x, y, w, h)
+
+    def send_key(self, key: str):
+        pass  # TODO: Add send_key method
+
+
+class AutomatableGame__Linux(AbstractAutomatableGame):
+    """Base class for each platform."""
+
+    def __init__(self):
+        super().__init__(self)
+
+    def fetch_sshot(self):
+        return pyautogui.screenshot(region=self.loc)
+
+    def send_key(self, key: str):
+        pass  # TODO: Add send_key method