Add new game manager

GhostBallBot/game/manager.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+# Copyright 2022 - c0de <c0de@c0de.dev>
+# Licensed under the MIT License (https://opensource.org/licenses/MIT)
+
+# pylint: disable=no-member
+
+"""
+    A Context Manager / State Machine that keeps track of
+    a single game instance (there should only be one) in a
+    Discord channel
+"""
+
+from database.models import database, GameModel as Game
+
+class BaseGameManager:
+    """Base Game Manager for each Game Manager class to inherit"""
+
+    def __init__(self):
+        # Only one game should run at at time
+        self.is_running = False
+
+        self.commands = []
+
+        self.game = Game
+
+        # Discord message
+        self.message = None
+
+        # Discord client instance
+        self.discord = None
+
+    def __enter__(self):
+        """
+        Allows use of `with Game() as game` for try/except statements
+        (https://peps.python.org/pep-0343/)
+        """
+
+        database.connect()
+        return self
+
+    def __exit__(self, exception_type, exception_value, exception_traceback):
+        """
+        Automagically close the database
+        when this class has ended execution
+        """
+        database.close()
+