#W# Initial Commit: Avatars Conquest

Scripts/Commands/Generic/Extensions/SortExtension.cs

@@ -0,0 +1,109 @@
+using System;
+using System.Reflection;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Server.Commands.Generic
+{
+	public sealed class SortExtension : BaseExtension
+	{
+		public static ExtensionInfo ExtInfo = new ExtensionInfo( 40, "Order", -1, delegate() { return new SortExtension(); } );
+
+		public static void Initialize()
+		{
+			ExtensionInfo.Register( ExtInfo );
+		}
+
+		public override ExtensionInfo Info
+		{
+			get { return ExtInfo; }
+		}
+
+		private List<OrderInfo> m_Orders;
+
+		private IComparer m_Comparer;
+
+		public SortExtension()
+		{
+			m_Orders = new List<OrderInfo>();
+		}
+
+		public override void Optimize( Mobile from, Type baseType, ref AssemblyEmitter assembly )
+		{
+			if ( baseType == null )
+				throw new Exception( "The ordering extension may only be used in combination with an object conditional." );
+
+			foreach ( OrderInfo order in m_Orders )
+			{
+				order.Property.BindTo( baseType, PropertyAccess.Read );
+				order.Property.CheckAccess( from );
+			}
+
+			if ( assembly == null )
+				assembly = new AssemblyEmitter( "__dynamic", false );
+
+			m_Comparer = SortCompiler.Compile( assembly, baseType, m_Orders.ToArray() );
+		}
+
+		public override void Parse( Mobile from, string[] arguments, int offset, int size )
+		{
+			if ( size < 1 )
+				throw new Exception( "Invalid ordering syntax." );
+
+			if ( Insensitive.Equals( arguments[offset], "by" ) )
+			{
+				++offset;
+				--size;
+
+				if ( size < 1 )
+					throw new Exception( "Invalid ordering syntax." );
+			}
+
+			int end = offset + size;
+
+			while ( offset < end )
+			{
+				string binding = arguments[offset++];
+
+				bool isAscending = true;
+
+				if ( offset < end )
+				{
+					string next = arguments[offset];
+
+					switch ( next.ToLower() )
+					{
+						case "+":
+						case "up":
+						case "asc":
+						case "ascending":
+							isAscending = true;
+							++offset;
+							break;
+
+						case "-":
+						case "down":
+						case "desc":
+						case "descending":
+							isAscending = false;
+							++offset;
+							break;
+					}
+				}
+
+				Property property = new Property( binding );
+
+				m_Orders.Add( new OrderInfo( property, isAscending ) );
+			}
+		}
+
+		public override void Filter( ArrayList list )
+		{
+			if ( m_Comparer == null )
+				throw new InvalidOperationException( "The extension must first be optimized." );
+
+			list.Sort( m_Comparer );
+		}
+	}
+}