added encounter system

Packages/com.jovian.encounter-system/Runtime/EncounterRegistry.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.AddressableAssets;
+
+namespace Jovian.EncounterSystem {
+    /// <summary>id → encounter cache. Editor auto-repopulates on asset changes; runtime must call <see cref="PopulateEncounters"/>.</summary>
+    [CreateAssetMenu(fileName = "EncounterRegistry", menuName = "Jovian/Encounter System/Encounter Registry")]
+    public class EncounterRegistry : ScriptableObject {
+        public EncountersCollection[] encounterCollections = Array.Empty<EncountersCollection>();
+
+        private readonly Dictionary<string, IEncounter> encounters = new();
+
+        public Dictionary<string, IEncounter> GetEncounters() => encounters;
+
+        public void RegisterEncounter(IEncounter encounter) {
+            encounters?.TryAdd(encounter?.EncounterDefinition?.internalId, encounter);
+        }
+
+        public void UnregisterEncounter(IEncounter encounter) {
+            encounters.Remove(encounter.EncounterDefinition.internalId);
+        }
+
+        public void ClearEncounters() {
+            encounters.Clear();
+        }
+
+        public void PopulateEncounters() {
+            foreach(var collection in encounterCollections) {
+                foreach(var encounter in collection.encounterTables) {
+                    foreach(var encounterInstance in encounter.encounters) {
+                        RegisterEncounter(encounterInstance);
+                    }
+                }
+            }
+        }
+    }
+
+#if UNITY_EDITOR
+    /// <summary>Rebuilds the registry (Addressables key "EncounterRegistry") on any asset import/move/delete.</summary>
+    public class EncounterRegister : UnityEditor.AssetPostprocessor {
+        private static EncounterRegistry registryCache;
+
+        private static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets, string[] movedAssets, string[] movedFromAssetPaths) {
+            registryCache ??= Addressables.LoadAssetAsync<EncounterRegistry>("EncounterRegistry").WaitForCompletion();
+            registryCache.ClearEncounters();
+            registryCache.PopulateEncounters();
+        }
+    }
+#endif
+}