CentrED

(*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License, Version 1.0 only

 * (the "License").  You may not use this file except in compliance

 * with the License.

 *

 * You can obtain a copy of the license at

 * http://www.opensource.org/licenses/cddl1.php.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at

 * http://www.opensource.org/licenses/cddl1.php.  If applicable,

 * add the following below this CDDL HEADER, with the fields enclosed

 * by brackets "[]" replaced with your own identifying * information:

 *      Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 *

 *

 *      Portions Copyright 2007 Andreas Schneider

 *)

unit UPackets;

interface

uses

  Classes, dzlib, UEnhancedMemoryStream, UPacket, UMap, UStatics;

type

  TBlockCoords = packed record

    X: Word;

    Y: Word;

  end;

  TBlockCoordsArray = array of TBlockCoords;

  { TCompressedPacket }

  TCompressedPacket = class(TPacket)

    constructor Create(APacket: TPacket);

  end;

  { TLoginRequestPacket }

  TLoginRequestPacket = class(TPacket)

    constructor Create(AUsername, APassword: string);

  end;

  { TQuitPacket }

  TQuitPacket = class(TPacket)

    constructor Create;

  end;

  { TRequestBlocksPacket }

  TRequestBlocksPacket = class(TPacket)

    constructor Create(ACoords: TBlockCoordsArray);

  end;

  { TFreeBlockPacket }

  TFreeBlockPacket = class(TPacket)

    constructor Create(AX, AY: Word);

  end;

  { TDrawMapPacket }

  TDrawMapPacket = class(TPacket)

    constructor Create(AX, AY: Word; AZ: ShortInt; ATileID: Word);

  end;

  { TInsertStaticPacket }

  TInsertStaticPacket = class(TPacket)

    constructor Create(AX, AY: Word; AZ: ShortInt; ATileID: Word; AHue: Word);

  end;

  { TDeleteStaticPacket }

  TDeleteStaticPacket = class(TPacket)

    constructor Create(AStaticItem: TStaticItem);

  end;

  { TElevateStaticPacket }

  TElevateStaticPacket = class(TPacket)

    constructor Create(AStaticItem: TStaticItem; ANewZ: ShortInt);

  end;

  { TMoveStaticPacket }

  TMoveStaticPacket = class(TPacket)

    constructor Create(AStaticItem: TStaticItem; ANewX, ANewY: Word);

  end;

  { THueStaticPacket }

  THueStaticPacket = class(TPacket)

    constructor Create(AStaticItem: TStaticItem; ANewHue: Word);

  end;

  { TUpdateClientPosPacket }

  TUpdateClientPosPacket = class(TPacket)

    constructor Create(AX, AY: Word);

  end;

  { TChatMessagePacket }

  TChatMessagePacket = class(TPacket)

    constructor Create(AMessage: string);

  end;

  { TGotoClientPosPacket }

  TGotoClientPosPacket = class(TPacket)

    constructor Create(AUsername: string);

  end;

  { TRequestRadarChecksumPacket }

  TRequestRadarChecksumPacket = class(TPacket)

    constructor Create;

  end;

  { TRequestRadarMapPacket }

  TRequestRadarMapPacket = class(TPacket)

    constructor Create;

  end;

  { TNoOpPacket }

  TNoOpPacket = class(TPacket)

    constructor Create;

  end;

implementation

{ TCompressedPacket }

constructor TCompressedPacket.Create(APacket: TPacket);

var

  compBuffer: TEnhancedMemoryStream;

  compStream: TCompressionStream;

  sourceStream: TStream;

begin

  inherited Create($01, 0);

  compBuffer := TEnhancedMemoryStream.Create;

  compStream := TCompressionStream.Create(clMax, compBuffer);

  sourceStream := APacket.Stream;  

  compStream.CopyFrom(sourceStream, 0);

  compStream.Free;  

  FStream.WriteCardinal(sourceStream.Size);

  FStream.CopyFrom(compBuffer, 0);

  compBuffer.Free;

  APacket.Free;

end;

{ TLoginRequestPacket }

constructor TLoginRequestPacket.Create(AUsername, APassword: string);

begin

  inherited Create($02, 0);

  FStream.WriteByte($03);

  FStream.WriteStringNull(AUsername);

  FStream.WriteStringNull(APassword);

end;

{ TQuitPacket }

constructor TQuitPacket.Create;

begin

  inherited Create($02, 0);

  FStream.WriteByte($05);

end;

{ TRequestBlocksPacket }

constructor TRequestBlocksPacket.Create(ACoords: TBlockCoordsArray);

var

  i: Integer;

begin

  inherited Create($04, 0);

  FStream.Write(ACoords[0], Length(ACoords) * SizeOf(TBlockCoords));

end;

{ TFreeBlockPacket }

constructor TFreeBlockPacket.Create(AX, AY: Word);

begin

  inherited Create($05, 5);

  FStream.WriteWord(AX);

  FStream.WriteWord(AY);

end;

{ TDrawMapPacket }

constructor TDrawMapPacket.Create(AX, AY: Word; AZ: ShortInt; ATileID: Word);

begin

  inherited Create($06, 8);

  FStream.WriteWord(AX);

  FStream.WriteWord(AY);

  FStream.WriteShortInt(AZ);

  FStream.WriteWord(ATileID);

end;

{ TInsertStaticPacket }

constructor TInsertStaticPacket.Create(AX, AY: Word; AZ: ShortInt;

  ATileID: Word; AHue: Word);

begin

  inherited Create($07, 10);

  FStream.WriteWord(AX);

  FStream.WriteWord(AY);

  FStream.WriteShortInt(AZ);

  FStream.WriteWord(ATileID);

  FStream.WriteWord(AHue);

end;

{ TDeleteStaticPacket }

constructor TDeleteStaticPacket.Create(AStaticItem: TStaticItem);

begin

  inherited Create($08, 10);

  FStream.WriteWord(AStaticItem.X);

  FStream.WriteWord(AStaticItem.Y);

  FStream.WriteShortInt(AStaticItem.Z);

  FStream.WriteWord(AStaticItem.TileID);

  FStream.WriteWord(AStaticItem.Hue);

end;

{ TElevateStaticPacket }

constructor TElevateStaticPacket.Create(AStaticItem: TStaticItem; ANewZ: ShortInt);

begin

  inherited Create($09, 11);

  FStream.WriteWord(AStaticItem.X);

  FStream.WriteWord(AStaticItem.Y);

  FStream.WriteShortInt(AStaticItem.Z);

  FStream.WriteWord(AStaticItem.TileID);

  FStream.WriteWord(AStaticItem.Hue);

  FStream.WriteShortInt(ANewZ);

end;

{ TMoveStaticPacket }

constructor TMoveStaticPacket.Create(AStaticItem: TStaticItem; ANewX,

  ANewY: Word);

begin

  inherited Create($0A, 14);

  FStream.WriteWord(AStaticItem.X);

  FStream.WriteWord(AStaticItem.Y);

  FStream.WriteShortInt(AStaticItem.Z);

  FStream.WriteWord(AStaticItem.TileID);

  FStream.WriteWord(AStaticItem.Hue);

  FStream.WriteWord(ANewX);

  FStream.WriteWord(ANewY);

end;

{ THueStaticPacket }

constructor THueStaticPacket.Create(AStaticItem: TStaticItem; ANewHue: Word);

begin

  inherited Create($0B, 12);

  FStream.WriteWord(AStaticItem.X);

  FStream.WriteWord(AStaticItem.Y);

  FStream.WriteShortInt(AStaticItem.Z);

  FStream.WriteWord(AStaticItem.TileID);

  FStream.WriteWord(AStaticItem.Hue);

  FStream.WriteWord(ANewHue);

end;

{ TUpdateClientPosPacket }

constructor TUpdateClientPosPacket.Create(AX, AY: Word);

begin

  inherited Create($0C, 0);

  FStream.WriteByte($04);

  FStream.WriteWord(AX);

  FStream.WriteWord(AY);

end;

{ TChatMessagePacket }

constructor TChatMessagePacket.Create(AMessage: string);

begin

  inherited Create($0C, 0);

  FStream.WriteByte($05);

  FStream.WriteStringNull(AMessage);

end;

{ TGotoClientPosPacket }

constructor TGotoClientPosPacket.Create(AUsername: string);

begin

  inherited Create($0C, 0);

  FStream.WriteByte($06);

  FStream.WriteStringNull(AUsername);

end;

{ TRequestRadarChecksumPacket }

constructor TRequestRadarChecksumPacket.Create;

begin

  inherited Create($0D, 2);

  FStream.WriteByte($01);

end;

{ TRequestRadarMapPacket }

constructor TRequestRadarMapPacket.Create;

begin

  inherited Create($0D, 2);

  FStream.WriteByte($02);

end;

{ TNoOpPacket }

constructor TNoOpPacket.Create;

begin

  inherited Create($FF, 1);

end;

end.