Snake: Move geometry types into Geometry.h and add Direction enum

Userland/Games/Snake/Game.cpp

@@ -290,7 +290,7 @@ void Game::queue_velocity(int v, int h)
     m_velocity_queue.enqueue({ v, h });
 }
 
-Game::Velocity const& Game::last_velocity() const
+Velocity const& Game::last_velocity() const
 {
     if (!m_velocity_queue.is_empty())
         return m_velocity_queue.last();

Userland/Games/Snake/Game.h

@@ -1,12 +1,14 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
  * Copyright (c) 2022, the SerenityOS developers.
+ * Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
 #pragma once
 
+#include "Geometry.h"
 #include <AK/CircularQueue.h>
 #include <LibGUI/Frame.h>
 
@@ -36,21 +38,6 @@ private:
     virtual void keydown_event(GUI::KeyEvent&) override;
     virtual void timer_event(Core::TimerEvent&) override;
 
-    struct Coordinate {
-        int row { 0 };
-        int column { 0 };
-
-        bool operator==(Coordinate const& other) const
-        {
-            return row == other.row && column == other.column;
-        }
-    };
-
-    struct Velocity {
-        int vertical { 0 };
-        int horizontal { 0 };
-    };
-
     void game_over();
     void spawn_fruit();
     bool is_available(Coordinate const&);

Userland/Games/Snake/Geometry.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2022, the SerenityOS developers.
+ * Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Format.h>
+
+namespace Snake {
+
+enum class Direction {
+    Up,
+    Right,
+    Down,
+    Left,
+};
+
+struct Coordinate {
+    int row { 0 };
+    int column { 0 };
+
+    bool operator==(Coordinate const& other) const
+    {
+        return row == other.row && column == other.column;
+    }
+};
+
+struct Velocity {
+    int vertical { 0 };
+    int horizontal { 0 };
+
+    Direction as_direction() const
+    {
+        if (vertical > 0)
+            return Direction::Down;
+        if (vertical < 0)
+            return Direction::Up;
+        if (horizontal > 0)
+            return Direction::Right;
+        if (horizontal < 0)
+            return Direction::Left;
+
+        return Direction::Up;
+    }
+};
+
+}