(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

{$INCLUDE "options.inc"}

unit uCommands;

interface

var isDeveloperMode: boolean;

var isExternalSource: boolean;

type TCommandHandler = procedure (var params: shortstring);

procedure initModule;

procedure freeModule;

procedure RegisterVariable(Name: shortstring; p: TCommandHandler; Trusted: boolean; Rand: boolean);

procedure RegisterVariable(Name: shortstring; p: TCommandHandler; Trusted: boolean);

procedure ParseCommand(CmdStr: shortstring; TrustedSource: boolean); inline;

procedure ParseCommand(CmdStr: shortstring; TrustedSource, ExternalSource: boolean);

procedure ParseTeamCommand(s: shortstring);

procedure StopMessages(Message: Longword);

implementation

uses uConsts, uVariables, uConsole, uUtils, uDebug, SDLh;

type  PVariable = ^TVariable;

    TVariable = record

        Next: PVariable;

        Name: string[15];

        Handler: TCommandHandler;

        Trusted, Rand: boolean;

        end;

var Variables: PVariable;

procedure RegisterVariable(Name: shortstring; p: TCommandHandler; Trusted: boolean);

begin

RegisterVariable(Name, p, Trusted, false);

end;

procedure RegisterVariable(Name: shortstring; p: TCommandHandler; Trusted: boolean; Rand: boolean);

var

    value: PVariable;

begin

New(value);

TryDo(value <> nil, 'RegisterVariable: value = nil', true);

FillChar(value^, sizeof(TVariable), 0);

value^.Name:= Name;

value^.Handler:= p;

value^.Trusted:= Trusted;

value^.Rand:= Rand;

if Variables = nil then

    Variables:= value

else

    begin

    value^.Next:= Variables;

    Variables:= value

    end;

end;

procedure ParseCommand(CmdStr: shortstring; TrustedSource: boolean); inline;

begin

    ParseCommand(CmdStr, TrustedSource, false)

end;

procedure ParseCommand(CmdStr: shortstring; TrustedSource, ExternalSource: boolean);

var s: shortstring;

    t: PVariable;

    c: char;

begin

isExternalSource:= ExternalSource or ((CurrentTeam <> nil) and CurrentTeam^.ExtDriven);

//WriteLnToConsole(CmdStr);

if CmdStr[0]=#0 then

    exit;

c:= CmdStr[1];

if (c = '/') or (c = '$') then

    Delete(CmdStr, 1, 1);

s:= '';

SplitBySpace(CmdStr, s);

AddFileLog('[Cmd] ' + CmdStr + ' (' + inttostr(length(s)) + ')');

t:= Variables;

while t <> nil do

    begin

    if t^.Name = CmdStr then

        begin

        if TrustedSource or t^.Trusted then

            begin

            if t^.Rand and (not CheckNoTeamOrHH) then 

                CheckSum:= CheckSum xor LongWord(SDLNet_Read32(@CmdStr)) xor LongWord(s[0]) xor GameTicks;

            t^.Handler(s);

            end;

        exit

        end

    else

        t:= t^.Next

    end;

case c of

    '$': WriteLnToConsole(errmsgUnknownVariable + ': "$' + CmdStr + '"')

    else

        WriteLnToConsole(errmsgUnknownCommand  + ': "/' + CmdStr + '"') end

end;

procedure ParseTeamCommand(s: shortstring);

var Trusted: boolean;

begin

Trusted:= (CurrentTeam <> nil)

          and (not CurrentTeam^.ExtDriven)

          and (CurrentHedgehog^.BotLevel = 0);

ParseCommand(s, Trusted);

if (CurrentTeam <> nil) and (not CurrentTeam^.ExtDriven) and (ReadyTimeLeft > 1) then

    ParseCommand('gencmd R', true)

end;

procedure StopMessages(Message: Longword);

begin

if (Message and gmLeft) <> 0 then

    ParseCommand('/-left', true)

else if (Message and gmRight) <> 0 then

    ParseCommand('/-right', true) 

else if (Message and gmUp) <> 0 then

    ParseCommand('/-up', true)

else if (Message and gmDown) <> 0 then

    ParseCommand('/-down', true)

else if (Message and gmAttack) <> 0 then

    ParseCommand('/-attack', true)

end;

procedure initModule;

begin

    Variables:= nil;

    isDeveloperMode:= true;

end;

procedure freeModule;

var t, tt: PVariable;

begin

    tt:= Variables;

    Variables:= nil;

    while tt <> nil do

    begin

        t:= tt;

        tt:= tt^.Next;

        Dispose(t)

    end;

end;

end.