Reorganizes Project (#41)

Projects/Scripts/Items/Misc/EffectItem.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+
+namespace Server.Items
+{
+  public class EffectItem : Item
+  {
+    private static List<EffectItem> m_Free = new List<EffectItem>(); // List of available EffectItems
+
+    public static readonly TimeSpan DefaultDuration = TimeSpan.FromSeconds(5.0);
+
+    private EffectItem() : base(1) // nodraw
+    {
+      Movable = false;
+    }
+
+    public EffectItem(Serial serial) : base(serial)
+    {
+    }
+
+    public override bool Decays => true;
+
+    public static EffectItem Create(Point3D p, Map map, TimeSpan duration)
+    {
+      EffectItem item = null;
+
+      for (int i = m_Free.Count - 1; item == null && i >= 0; --i) // We reuse new entries first so decay works better
+      {
+        EffectItem free = m_Free[i];
+
+        m_Free.RemoveAt(i);
+
+        if (!free.Deleted && free.Map == Map.Internal)
+          item = free;
+      }
+
+      if (item == null)
+        item = new EffectItem();
+      else
+        item.ItemID = 1;
+
+      item.MoveToWorld(p, map);
+      item.BeginFree(duration);
+
+      return item;
+    }
+
+    public void BeginFree(TimeSpan duration)
+    {
+      new FreeTimer(this, duration).Start();
+    }
+
+    public override void Serialize(GenericWriter writer)
+    {
+      base.Serialize(writer);
+
+      writer.Write(0); // version
+    }
+
+    public override void Deserialize(GenericReader reader)
+    {
+      base.Deserialize(reader);
+
+      int version = reader.ReadInt();
+
+      Delete();
+    }
+
+    private class FreeTimer : Timer
+    {
+      private EffectItem m_Item;
+
+      public FreeTimer(EffectItem item, TimeSpan delay) : base(delay)
+      {
+        m_Item = item;
+        Priority = TimerPriority.OneSecond;
+      }
+
+      protected override void OnTick()
+      {
+        m_Item.Internalize();
+
+        m_Free.Add(m_Item);
+      }
+    }
+  }
+}