feat: Player

Assets/_Content/Scripts/Characters/PlayerEvent.cs

@@ -0,0 +1,96 @@
+using UnityEngine;
+using UnityEngine.Events;
+using Arena.Characters;
+
+namespace Arena.Interactions
+{
+	/// <summary>
+	/// Zone that raises OnPlayer when the player enters it, or when the player interacts inside it.
+	/// It never acts on the player itself: the actions are set up in the Inspector.
+	/// </summary>
+	[RequireComponent(typeof(Collider))]
+	public class PlayerEvent : MonoBehaviour
+	{
+		public enum Trigger
+		{
+			OnPlayerEnter,
+			OnPlayerInteract
+		}
+
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("OnPlayerEnter: as soon as the player enters. OnPlayerInteract: when the player interacts inside the zone.")]
+			public Trigger Trigger;
+		}
+
+		#region Fields
+
+		[SerializeField] private Settings _settings;
+
+		[Tooltip("Actions raised for the player: heal, ammo, sound, hide this object...")]
+		[SerializeField] private UnityEvent _onPlayer;
+
+		private bool _isListening;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		private void OnDisable()
+		{
+			// The object can be hidden while the player is inside
+			StopListening();
+		}
+
+		private void OnTriggerEnter(Collider other)
+		{
+			if (!IsPlayer(other))
+				return;
+
+			if (_settings.Trigger == Trigger.OnPlayerEnter)
+				_onPlayer.Invoke();
+			else
+				StartListening();
+		}
+
+		private void OnTriggerExit(Collider other)
+		{
+			if (IsPlayer(other))
+				StopListening();
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private bool IsPlayer(Collider other)
+		{
+			return Player.Instance != null && other.gameObject == Player.Instance.gameObject;
+		}
+
+		private void StartListening()
+		{
+			Player.Instance.OnInteract += HandleInteract;
+			_isListening = true;
+		}
+
+		private void StopListening()
+		{
+			if (!_isListening)
+				return;
+
+			if (Player.Instance != null)
+				Player.Instance.OnInteract -= HandleInteract;
+
+			_isListening = false;
+		}
+
+		private void HandleInteract()
+		{
+			_onPlayer.Invoke();
+		}
+
+		#endregion
+	}
+}