unit uFLNet;

interface

procedure connectOfficialServer;

procedure initModule;

procedure freeModule;

procedure sendNet(s: shortstring);

procedure sendNetLn(s: shortstring);

implementation

uses SDLh, uFLIPC, uFLTypes, uFLUICallback, uFLNetTypes, uFLUtils;

function getNextChar: char; forward;

function getCurrChar: char; forward;

type

    TNetState = (netDisconnected, netConnecting);

    TParserState = record

                       cmd: TCmdType;

                       l: LongInt;

                       netState: TNetState;

                       buf: shortstring;

                       bufpos: byte;

                   end;

    PHandler = procedure;

var state: TParserState;

procedure handleTail; forward;

function getShortString: shortstring; forward;

procedure handler_;

begin

    sendUI(mtNetData, @state.cmd, sizeof(state.cmd));

    handleTail()

end;

procedure handler_L;

var cmd: TCmdParamL;

begin

    cmd.cmd:= state.cmd;

    sendUI(mtNetData, @cmd, sizeof(cmd));

    handleTail()

end;

procedure handler_ML;

var cmd: TCmdParamL;

    f: boolean;

begin

    writeln('handler_ML');

    sendUI(mtNetData, @state.cmd, sizeof(state.cmd));

    cmd.cmd:= Succ(state.cmd);

    repeat

        f:= cmd.str1[0] <> #0;

        if f then

            sendUI(mtNetData, @cmd, sizeof(cmd));

    until not f;

    state.l:= 0

end;

procedure handler_MS;

var cmd: TCmdParamS;

    f: boolean;

begin

    sendUI(mtNetData, @state.cmd, sizeof(state.cmd));

    cmd.cmd:= Succ(state.cmd);

    repeat

        cmd.str1:= getShortString;

        f:= cmd.str1[0] <> #0;

        if f then

            sendUI(mtNetData, @cmd, sizeof(cmd));

    until not f;

    state.l:= 0

end;

procedure handler_S;

var cmd: TCmdParamS;

begin

    cmd.cmd:= state.cmd;

    cmd.str1:= getShortString;

    if cmd.str1[0] = #0 then exit;

    sendUI(mtNetData, @cmd, sizeof(cmd));

    handleTail()

end;

procedure handler_SL;

var cmd: TCmdParamSL;

begin

    cmd.cmd:= state.cmd;

    cmd.str1:= getShortString;

    if cmd.str1[0] = #0 then exit;

    if cmd.str2[0] = #0 then exit;

    sendUI(mtNetData, @cmd, sizeof(cmd));

    handleTail()

end;

procedure handler_SMS;

var cmd: TCmdParamS;

    f: boolean;

begin

    cmd.cmd:= state.cmd;

    cmd.str1:= getShortString;

    if cmd.str1[0] = #0 then exit;

    sendUI(mtNetData, @cmd, sizeof(cmd));

    cmd.cmd:= Succ(state.cmd);

    repeat

        cmd.str1:= getShortString;

        f:= cmd.str1[0] <> #0;

        if f then

            sendUI(mtNetData, @cmd, sizeof(cmd));

    until not f;

    state.l:= 0

end;

procedure handler__i;

var cmd: TCmdParami;

    s: shortstring;

begin

    s:= getShortString();

    if s[0] = #0 then exit;

    cmd.cmd:= state.cmd;

    s:= getShortString();

    if s[0] = #0 then exit;

    cmd.param1:= strToInt(s);

    sendUI(mtNetData, @cmd, sizeof(cmd));

    handleTail()

end;

procedure handler_i;

var cmd: TCmdParami;

    s: shortstring;

begin

    s:= getShortString();

    if s[0] = #0 then exit;

    cmd.cmd:= state.cmd;

    cmd.param1:= strToInt(s);

    sendUI(mtNetData, @cmd, sizeof(cmd));

    handleTail()

end;

procedure handler__UNKNOWN_;

begin

    writeln('[NET] Unknown cmd');

    handleTail();

    state.l:= 0

end;

const net2cmd: array[0..46] of TCmdType = (cmd_WARNING, cmd_WARNING,

    cmd_TEAM_COLOR, cmd_TEAM_ACCEPTED, cmd_SERVER_VARS, cmd_SERVER_MESSAGE,

    cmd_SERVER_AUTH, cmd_RUN_GAME, cmd_ROUND_FINISHED, cmd_ROOM_UPD, cmd_ROOM_DEL,

    cmd_ROOM_ADD, cmd_ROOMS, cmd_REMOVE_TEAM, cmd_PROTO, cmd_PING, cmd_NOTICE,

    cmd_NICK, cmd_LOBBY_LEFT, cmd_LOBBY_JOINED, cmd_LEFT, cmd_KICKED, cmd_JOINING,

    cmd_JOINED, cmd_INFO, cmd_HH_NUM, cmd_ERROR, cmd_EM, cmd_CONNECTED,

    cmd_CLIENT_FLAGS, cmd_CHAT, cmd_CFG_THEME, cmd_CFG_TEMPLATE, cmd_CFG_SEED,

    cmd_CFG_SCRIPT, cmd_CFG_SCHEME, cmd_CFG_MAZE_SIZE, cmd_CFG_MAP, cmd_CFG_MAPGEN,

    cmd_CFG_FULLMAPCONFIG, cmd_CFG_FEATURE_SIZE, cmd_CFG_DRAWNMAP, cmd_CFG_AMMO,

    cmd_BYE, cmd_BANLIST, cmd_ASKPASSWORD, cmd_ADD_TEAM);

const letters: array[0..332] of char = ('A', 'D', 'D', '_', 'T', 'E', 'A', 'M',

    #10, 'S', 'K', 'P', 'A', 'S', 'S', 'W', 'O', 'R', 'D', #10, 'B', 'A', 'N', 'L',

    'I', 'S', 'T', #10, 'Y', 'E', #10, 'C', 'F', 'G', #10, 'A', 'M', 'M', 'O', #10,

    'D', 'R', 'A', 'W', 'N', 'M', 'A', 'P', #10, 'F', 'E', 'A', 'T', 'U', 'R', 'E',

    '_', 'S', 'I', 'Z', 'E', #10, 'U', 'L', 'L', 'M', 'A', 'P', 'C', 'O', 'N', 'F',

    'I', 'G', #10, 'M', 'A', 'P', 'G', 'E', 'N', #10, #10, 'Z', 'E', '_', 'S', 'I',

    'Z', 'E', #10, 'S', 'C', 'H', 'E', 'M', 'E', #10, 'R', 'I', 'P', 'T', #10, 'E',

    'E', 'D', #10, 'T', 'E', 'M', 'P', 'L', 'A', 'T', 'E', #10, 'H', 'E', 'M', 'E',

    #10, 'H', 'A', 'T', #10, 'L', 'I', 'E', 'N', 'T', '_', 'F', 'L', 'A', 'G', 'S',

    #10, 'O', 'N', 'N', 'E', 'C', 'T', 'E', 'D', #10, 'E', 'M', #10, 'R', 'R', 'O',

    'R', #10, 'H', 'H', '_', 'N', 'U', 'M', #10, 'I', 'N', 'F', 'O', #10, 'J', 'O',

    'I', 'N', 'E', 'D', #10, 'I', 'N', 'G', #10, 'K', 'I', 'C', 'K', 'E', 'D', #10,

    'L', 'E', 'F', 'T', #10, 'O', 'B', 'B', 'Y', ':', 'J', 'O', 'I', 'N', 'E', 'D',

    #10, 'L', 'E', 'F', 'T', #10, 'N', 'I', 'C', 'K', #10, 'O', 'T', 'I', 'C', 'E',

    #10, 'P', 'I', 'N', 'G', #10, 'R', 'O', 'T', 'O', #10, 'R', 'E', 'M', 'O', 'V',

    'E', '_', 'T', 'E', 'A', 'M', #10, 'O', 'O', 'M', 'S', #10, #10, 'A', 'D', 'D',

    #10, 'D', 'E', 'L', #10, 'U', 'P', 'D', #10, 'U', 'N', 'D', '_', 'F', 'I', 'N',

    'I', 'S', 'H', 'E', 'D', #10, 'U', 'N', '_', 'G', 'A', 'M', 'E', #10, 'S', 'E',

    'R', 'V', 'E', 'R', '_', 'A', 'U', 'T', 'H', #10, 'M', 'E', 'S', 'S', 'A', 'G',

    'E', #10, 'V', 'A', 'R', 'S', #10, 'T', 'E', 'A', 'M', '_', 'A', 'C', 'C', 'E',

    'P', 'T', 'E', 'D', #10, 'C', 'O', 'L', 'O', 'R', #10, 'W', 'A', 'R', 'N', 'I',

    'N', 'G', #10, #0, #10);

const commands: array[0..332] of integer = (20, 8, 0, 0, 0, 0, 0, 0, -56, 0, 0,

    0, 0, 0, 0, 0, 0, 0, 0, -55, 11, 7, 0, 0, 0, 0, 0, -54, 0, 0, -53, 115, 89, 0,

    0, 5, 0, 0, 0, -52, 9, 0, 0, 0, 0, 0, 0, 0, -51, 26, 12, 0, 0, 0, 0, 0, 0, 0, 0,

    0, 0, -50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -49, 16, 0, 6, 4, 0, 0, -48, -47,

    0, 0, 0, 0, 0, 0, 0, -46, 16, 11, 5, 0, 0, 0, -45, 0, 0, 0, 0, -44, 0, 0, 0,

    -43, 0, 8, 0, 0, 0, 0, 0, 0, -42, 0, 0, 0, 0, -41, 4, 0, 0, -40, 12, 0, 0, 0, 0,

    0, 0, 0, 0, 0, 0, -39, 0, 0, 0, 0, 0, 0, 0, 0, -38, 8, 2, -37, 0, 0, 0, 0, -36,

    7, 0, 0, 0, 0, 0, -35, 5, 0, 0, 0, -34, 11, 0, 0, 0, 3, 0, -33, 0, 0, 0, -32, 7,

    0, 0, 0, 0, 0, -31, 22, 4, 0, 0, -30, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, -29, 0,

    0, 0, 0, -28, 11, 4, 0, 0, -27, 0, 0, 0, 0, 0, -26, 10, 4, 0, 0, -25, 0, 0, 0,

    0, -24, 51, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, -23, 31, 17, 0, 2, -22, 0, 4, 0, 0,

    -21, 4, 0, 0, -20, 0, 0, 0, -19, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -18, 0, 0,

    0, 0, 0, 0, 0, -17, 25, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, -16, 8, 0, 0, 0, 0, 0, 0,

    -15, 0, 0, 0, 0, -14, 20, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 0, 0, -13, 0, 0, 0, 0,

    0, -12, 8, 0, 0, 0, 0, 0, 0, -11, 0, -10);

const handlers: array[0..46] of PHandler = (@handler__UNKNOWN_, @handler_L,

    @handler_MS, @handler_S, @handler_SL, @handler_L, @handler_S, @handler_,

    @handler_, @handler_MS, @handler_S, @handler_MS, @handler_MS, @handler_S,

    @handler_i, @handler_MS, @handler_L, @handler_S, @handler_SL, @handler_MS,

    @handler_SMS, @handler_, @handler_S, @handler_MS, @handler_MS, @handler_MS,

    @handler_L, @handler_ML, @handler__i, @handler_SMS, @handler_SL, @handler_S,

    @handler_i, @handler_S, @handler_S, @handler_MS, @handler_i, @handler_i,

    @handler_S, @handler_ML, @handler_i, @handler_L, @handler_SL, @handler_SL,

    @handler_MS, @handler_S, @handler_MS);

procedure handleTail;

var cnt: Longint;

    c: char;

begin

    c:= getCurrChar;

    repeat

        if c = #10 then cnt:= 0 else cnt:= 1;

        repeat

            c:= getNextChar;

            inc(cnt)

        until (c = #0) or (c = #10);

    until (c = #0) or (cnt = 1);

    state.l:= 0

end;

var sock: PTCPSocket;

    netReaderThread: PSDL_Thread;

function getCurrChar: char;

begin

    getCurrChar:= state.buf[state.bufpos]

end;

function getNextChar: char;

var r: byte;

begin

    if state.bufpos < byte(state.buf[0]) then

    begin

        inc(state.bufpos);

    end else

    begin

        r:= SDLNet_TCP_Recv(sock, @state.buf[1], 255);

        if r > 0 then

        begin

            state.bufpos:= 1;

            state.buf[0]:= char(r);

        end else

        begin

            state.bufpos:= 0;

            state.buf[0]:= #0;

        end

    end;

    getNextChar:= state.buf[state.bufpos];

end;

function netReader(data: pointer): LongInt; cdecl; export;

var c: char;

    ipaddr: TIPAddress;

begin

    netReader:= 0;

    if SDLNet_ResolveHost(ipaddr, PChar('netserver.hedgewars.org'), 46631) = 0 then

        sock:= SDLNet_TCP_Open(ipaddr);

    repeat

        c:= getNextChar;

        //writeln('>>>>> ', c, ' [', letters[state.l], '] ', commands[state.l], ' ', state.l);

        if c = #0 then

            state.netState:= netDisconnected

        else

        begin

            while (letters[state.l] <> c) and (commands[state.l] > 0) do

                inc(state.l, commands[state.l]);

            if c = letters[state.l] then

                if commands[state.l] < 0 then

                begin

                    state.cmd:= net2cmd[-10 - commands[state.l]];

                    writeln('[NET] ', state.cmd);

                    handlers[-10 - commands[state.l]]();

                    state.l:= 0

                end

                else

                    inc(state.l)

            else

            begin

                handler__UNKNOWN_()

            end

        end

    until state.netState = netDisconnected;

    SDLNet_TCP_Close(sock);

    sock:= nil;

    writeln('[NET] netReader: disconnected');

end;

procedure sendNet(s: shortstring);

begin

    writeln('[NET] Send: ', s);

    ipcToNet(s + endCmd);

end;

procedure sendNetLn(s: shortstring);

begin

    writeln('[NET] Send: ', s);

    ipcToNet(s + #10);

end;

function getShortString: shortstring;

var s: shortstring;

    c: char;

begin

    s[0]:= #0;

    repeat

        inc(s[0]);

        s[byte(s[0])]:= getNextChar

    until (s[0] = #255) or (s[byte(s[0])] = #10) or (s[byte(s[0])] = #0);

    if s[byte(s[0])] = #10 then

        dec(s[0])

    else

        repeat c:= getNextChar until (c = #0) or (c = #10);

    getShortString:= s

end;

procedure netSendCallback(p: pointer; msg: PChar; len: Longword);

begin

    // W A R N I N G: totally thread-unsafe due to use of sock variable

    SDLNet_TCP_Send(sock, msg, len);

end;

procedure connectOfficialServer;

begin

    if sock <> nil then

        exit;

    state.bufpos:= 0;

    state.buf:= '';

    state.l:= 0;

    state.netState:= netConnecting;

    netReaderThread:= SDL_CreateThread(@netReader, 'netReader', nil);

    SDL_DetachThread(netReaderThread)

end;

procedure initModule;

begin

    sock:= nil;

    SDLNet_Init;

    registerNetCallback(nil, @netSendCallback);

end;

procedure freeModule;

begin

end;

end.