refactor: simplified interest management

Assets/Mirage/Components/Visibility/Inspectors/DistanceVisibilityFactory.cs

@@ -0,0 +1,20 @@
+using Mirage.InterestManagement;
+using UnityEngine;
+
+namespace Mirage.Components
+{
+    [DisallowMultipleComponent]
+    public class DistanceVisibilityFactory : VisibilitySystemFactory
+    {
+        /// <summary>
+        /// How often (in seconds) that this object should update the list of observers that can see it.
+        /// </summary>
+        [Tooltip("How often (in seconds) that this object should update the list of observers that can see it.")]
+        public float VisibilityUpdateInterval = 1;
+
+        protected override VisibilitySystem CreateSystem(ServerObjectManager serverObjectManager)
+        {
+            return new DistanceVisibilitySystem(serverObjectManager, VisibilityUpdateInterval);
+        }
+    }
+}

Assets/Mirage/Components/Visibility/Inspectors/SceneVisibilityFactory.cs

@@ -0,0 +1,14 @@
+using Mirage.InterestManagement;
+using UnityEngine;
+
+namespace Mirage.Components
+{
+    [DisallowMultipleComponent]
+    public class SceneVisibilityFactory : VisibilitySystemFactory
+    {
+        protected override VisibilitySystem CreateSystem(ServerObjectManager serverObjectManager)
+        {
+            return new SceneVisibilitySystem(serverObjectManager);
+        }
+    }
+}

Assets/Mirage/Components/Visibility/Inspectors/VisibilitySystemFactory.cs

@@ -0,0 +1,26 @@
+using Mirage.InterestManagement;
+using UnityEngine;
+
+namespace Mirage.Components
+{
+    public abstract class VisibilitySystemFactory : MonoBehaviour
+    {
+        public NetworkServer Server;
+        public VisibilitySystem System { get; private set; }
+
+        private void Awake()
+        {
+            System = CreateSystem(Server.GetComponent<ServerObjectManager>());
+        }
+        private void OnDestroy()
+        {
+            System?.ShutDown();
+            System = null;
+        }
+
+        /// <summary>
+        /// Do initialization of data inside of here.
+        /// </summary>
+        protected abstract VisibilitySystem CreateSystem(ServerObjectManager serverObjectManager);
+    }
+}