142 lines
2.9 KiB
C#
142 lines
2.9 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace Server.Commands.Generic
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{
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public delegate BaseExtension ExtensionConstructor();
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public sealed class ExtensionInfo
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{
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public static Dictionary<string, ExtensionInfo> Table { get; } = new Dictionary<string, ExtensionInfo>( StringComparer.InvariantCultureIgnoreCase );
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public static void Register( ExtensionInfo ext )
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{
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Table[ext.Name] = ext;
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}
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public int Order { get; }
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public string Name { get; }
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public int Size { get; }
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public bool IsFixedSize => ( Size >= 0 );
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public ExtensionConstructor Constructor { get; }
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public ExtensionInfo( int order, string name, int size, ExtensionConstructor constructor )
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{
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Name = name;
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Size = size;
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Order = order;
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Constructor = constructor;
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}
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}
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public sealed class Extensions : List<BaseExtension>
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{
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public Extensions()
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{
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}
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public bool IsValid( object obj )
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{
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for ( int i = 0; i < Count; ++i )
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{
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if ( !this[i].IsValid( obj ) )
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return false;
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}
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return true;
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}
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public void Filter( ArrayList list )
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{
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for ( int i = 0; i < Count; ++i )
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this[i].Filter( list );
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}
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public static Extensions Parse( Mobile from, ref string[] args )
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{
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Extensions parsed = new Extensions();
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int size = args.Length;
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Type baseType = null;
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for ( int i = args.Length - 1; i >= 0; --i )
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{
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if ( !ExtensionInfo.Table.TryGetValue( args[i], out ExtensionInfo extInfo ) )
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continue;
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if ( extInfo.IsFixedSize && i != ( size - extInfo.Size - 1 ) )
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throw new Exception( "Invalid extended argument count." );
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BaseExtension ext = extInfo.Constructor();
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ext.Parse( from, args, i + 1, size - i - 1 );
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if ( ext is WhereExtension extension )
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baseType = extension.Conditional.Type;
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parsed.Add( ext );
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size = i;
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}
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parsed.Sort( delegate( BaseExtension a, BaseExtension b )
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{
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return ( a.Order - b.Order );
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} );
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AssemblyEmitter emitter = null;
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foreach ( BaseExtension update in parsed )
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update.Optimize( from, baseType, ref emitter );
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if ( size != args.Length )
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{
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string[] old = args;
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args = new string[size];
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for ( int i = 0; i < args.Length; ++i )
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args[i] = old[i];
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}
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return parsed;
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}
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}
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public abstract class BaseExtension
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{
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public abstract ExtensionInfo Info { get; }
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public string Name => Info.Name;
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public int Size => Info.Size;
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public bool IsFixedSize => Info.IsFixedSize;
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public int Order => Info.Order;
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public virtual void Optimize( Mobile from, Type baseType, ref AssemblyEmitter assembly )
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{
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}
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public virtual void Parse( Mobile from, string[] arguments, int offset, int size )
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{
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}
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public virtual bool IsValid( object obj )
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{
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return true;
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}
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public virtual void Filter( ArrayList list )
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{
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}
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}
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}
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