Begin refactoring gui

This begins a big refactor of moving more code out of the Gui struct into contexts, controllers, and helpers. We also move some code into structs in the
gui package purely for the sake of better encapsulation

pkg/gui/controllers/snake_controller.go

@@ -8,20 +8,16 @@ import (
 type SnakeController struct {
 	baseController
 	*controllerCommon
-
-	getGame func() *snake.Game
 }
 
 var _ types.IController = &SnakeController{}
 
 func NewSnakeController(
 	common *controllerCommon,
-	getGame func() *snake.Game,
 ) *SnakeController {
 	return &SnakeController{
 		baseController:   baseController{},
 		controllerCommon: common,
-		getGame:          getGame,
 	}
 }
 
@@ -56,9 +52,24 @@ func (self *SnakeController) Context() types.Context {
 	return self.contexts.Snake
 }
 
+func (self *SnakeController) GetOnFocus() func(types.OnFocusOpts) error {
+	return func(types.OnFocusOpts) error {
+		self.helpers.Snake.StartGame()
+		return nil
+	}
+}
+
+func (self *SnakeController) GetOnFocusLost() func(types.OnFocusLostOpts) error {
+	return func(types.OnFocusLostOpts) error {
+		self.helpers.Snake.ExitGame()
+		self.helpers.Window.MoveToTopOfWindow(self.contexts.Submodules)
+		return nil
+	}
+}
+
 func (self *SnakeController) SetDirection(direction snake.Direction) func() error {
 	return func() error {
-		self.getGame().SetDirection(direction)
+		self.helpers.Snake.SetDirection(direction)
 		return nil
 	}
 }