Starter

Assets/_Content/Scripts/Interactions/AmmoEffect.cs

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+using UnityEngine;
+using Arena.Characters;
+
+namespace Arena.Interactions
+{
+    /// <summary>
+    /// Gives ammo to the player. Apply is meant to be linked to a PlayerEvent.
+    /// </summary>
+    public class AmmoEffect : MonoBehaviour
+    {
+        [System.Serializable]
+        public class Settings
+        {
+            [Tooltip("Ammo given to the player.")]
+            [Min(1)] public int Amount = 10;
+        }
+
+        #region FIELDS
+
+        [SerializeField] private Settings _settings;
+
+        #endregion
+
+        #region PUBLIC METHODS
+
+        public void Apply()
+        {
+            if (Player.Instance != null)
+                Player.Instance.Launcher.AddAmmo(_settings.Amount);
+        }
+
+        #endregion
+    }
+}

Assets/_Content/Scripts/Interactions/AmmoEffect.cs.meta

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+fileFormatVersion: 2
+guid: 6739c594c812f4a4a84f51156853fc45

Assets/_Content/Scripts/Interactions/HealEffect.cs

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+using UnityEngine;
+using Arena.Characters;
+
+namespace Arena.Interactions
+{
+    /// <summary>
+    /// Heals the player. Apply is meant to be linked to a PlayerEvent.
+    /// </summary>
+    public class HealEffect : MonoBehaviour
+    {
+        [System.Serializable]
+        public class Settings
+        {
+            [Tooltip("Health points given to the player.")]
+            [Min(1)] public int Amount = 25;
+        }
+
+        #region FIELDS
+
+        [SerializeField] private Settings _settings;
+
+        #endregion
+
+        #region PUBLIC METHODS
+
+        public void Apply()
+        {
+            if (Player.Instance != null)
+                Player.Instance.Health.Heal(_settings.Amount);
+        }
+
+        #endregion
+    }
+}

Assets/_Content/Scripts/Interactions/HealEffect.cs.meta

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+fileFormatVersion: 2
+guid: 4f7b07697ca242a4cbfd52a7158769ef

Assets/_Content/Scripts/Interactions/PlayerEvent.cs

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+using UnityEngine;
+using UnityEngine.Events;
+using Arena.Characters;
+
+namespace Arena.Interactions
+{
+    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;
+        }
+
+        [SerializeField] private Settings _settings;
+        [SerializeField] private UnityEvent _onPlayer;
+
+        private bool _isListening;
+
+        #region UNITY LIFECYCLES
+
+        private void OnDisable()
+        {
+            // The object can be hidden while the player is inside
+            StopListening();
+        }
+
+        void OnTriggerEnter(Collider other)
+        {
+            if (!IsPlayer(other))
+                return;
+
+            if (_settings.Trigger == Trigger.OnPlayerEnter)
+                _onPlayer.Invoke();
+            else
+                StartListening();
+        }
+
+        void OnTriggerExit(Collider other)
+        {
+            if (IsPlayer(other))
+                StopListening();
+        }
+
+        #endregion
+
+        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();
+        }
+
+        public void Teleport(Transform target)
+        {
+            if (!Player.Instance)
+                return;
+
+            StopListening();
+            Player.Instance.Teleport(target);
+        }
+    }
+}

Assets/_Content/Scripts/Interactions/PlayerEvent.cs.meta

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+fileFormatVersion: 2
+guid: 7bed1a9cab72cda46bb8e8dd2d8c60a3