Split the PlayerMovement class into mulltiple files

Assets/Scripts/Player/PlayerState.cs

@@ -0,0 +1,58 @@
+using UnityEngine;
+
+public enum PlayerState
+{
+    RUNNING,
+    SLIDING,
+    WALL_RUNNING
+}
+
+public partial class PlayerMovement : MonoBehaviour
+{
+    private void UpdatePlayerState()
+    {
+        // Stores previous state
+        PlayerState previous = m_State;
+
+        // Works out wether the player's velocity is high enough to slide
+        Vector3 vel = m_Body.velocity;
+        bool canSlide = !(Mathf.Abs(vel.x) < m_SlideRequiredSpeed && Mathf.Abs(vel.z) < m_SlideRequiredSpeed);
+
+        // Checks if the player is in the wall running state
+        if (m_HitLhsWall || m_HitRhsWall)
+            { m_State = PlayerState.WALL_RUNNING; }
+
+        // Checks if the player is in the wall riding state
+        else if (m_SlidingKeyPressed && (canSlide || m_OnSlope) && m_Grounded)
+            { m_State = PlayerState.SLIDING; }
+
+        // Defaults to ruuning
+        else { m_State = PlayerState.RUNNING; }
+
+        // Exits early if the state has not changed
+        if (previous == m_State)
+            { return; }
+
+        // Calls exit function of old state
+        switch (previous)
+        {
+            case PlayerState.SLIDING:
+                StopSlide();
+                break;
+
+            default:
+                break;
+        }
+
+        // Calls entry function of new state
+        switch (m_State)
+        {
+            case PlayerState.SLIDING:
+                StartSlide();
+                break;
+
+            default:
+                break;
+        }
+    }
+}