Satchel f mouse input (#28)

* add basics for mouse input.

* basic class for MouseInput

src/Client/Systems/MouseInput.cs

@@ -1,10 +1,65 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Input;
+using Shared.Entities;
 using System;
+using System.Collections.Generic;
+using Shared.Components;
 
-namespace Client.Systems;
-
-public class MouseInput : Shared.Systems.System
+namespace Client.Systems
 {
-    public override void update(TimeSpan elapsedTime)
+    public class MouseInput : Shared.Systems.System
     {
+        private MouseState previousMouseState = Mouse.GetState();
+        private Controls m_controls;
+
+        public MouseInput(Controls controls) : base(typeof(Shared.Components.Input))
+        {
+            m_controls = controls; 
+        }
+
+        public override void update(TimeSpan elapsedTime)
+        {
+            var mouseState = Mouse.GetState();
+            var currentPosition = new Vector2(mouseState.X, mouseState.Y);
+
+            foreach (var entityPair in m_entities)
+            {
+                var entity = entityPair.Value;
+                // Try to get the Position component safely
+                try
+                {
+                    var positionComponent = entity.get<Position>();
+
+                    var wormHeadPosition = positionComponent.position;
+                    var direction = currentPosition - wormHeadPosition;
+
+                    // Check mouse movement relative to the worm head's position to decide on turn direction
+                    if (direction.X < 0 && currentPosition != previousMouseState.Position.ToVector2()) // Mouse moved left
+                    {
+                        HandleTurnLeft(entity, elapsedTime);
+                    }
+                    else if (direction.X > 0 && currentPosition != previousMouseState.Position.ToVector2()) // Mouse moved right
+                    {
+                        HandleTurnRight(entity, elapsedTime);
+                    }
+                }
+                catch (KeyNotFoundException)
+                {
+                    // Component not found, skip this entity
+                }
+            }
+
+            previousMouseState = mouseState; 
+        }
+
+        private void HandleTurnLeft(Entity entity, TimeSpan elapsedTime)
+        {
+            // Logic for left turn
+        }
+
+        private void HandleTurnRight(Entity entity, TimeSpan elapsedTime)
+        {
+            // Logic for right turn
+        }
     }
-}
+}