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m_cap.cpp

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/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
 * See: http://www.inspircd.org/wiki/index.php/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#include "inspircd.h"
#include "m_cap.h"

/* $ModDesc: Provides the CAP negotiation mechanism seen in ratbox-derived ircds */

/*
CAP LS
:alfred.staticbox.net CAP * LS :multi-prefix sasl
CAP REQ :multi-prefix
:alfred.staticbox.net CAP * ACK :multi-prefix
CAP CLEAR
:alfred.staticbox.net CAP * ACK :-multi-prefix
CAP REQ :multi-prefix
:alfred.staticbox.net CAP * ACK :multi-prefix
CAP LIST
:alfred.staticbox.net CAP * LIST :multi-prefix
CAP END
*/

class CommandCAP : public Command
{
        Module* Creator;
 public:
        CommandCAP (InspIRCd* Instance, Module* mod) : Command(Instance,"CAP", 0, 1, true), Creator(mod)
        {
                this->source = "m_cap.so";
        }

        CmdResult Handle (const std::vector<std::string> &parameters, User *user)
        {
                irc::string subcommand = parameters[0].c_str();

                if (subcommand == "REQ")
                {
                        CapData Data;

                        Data.type = subcommand;
                        Data.user = user;
                        Data.creator = this->Creator;

                        if (parameters.size() < 2)
                                return CMD_FAILURE;

                        // tokenize the input into a nice list of requested caps
                        std::string param = parameters[1];
                        std::string cap_;
                        irc::spacesepstream cap_stream(param);

                        while (cap_stream.GetToken(cap_))
                        {
                                Data.wanted.push_back(cap_);
                        }

                        user->Extend("CAP_REGHOLD");
                        Event event((char*) &Data, (Module*)this->Creator, "cap_req");
                        event.Send(this->ServerInstance);

                        if (Data.ack.size() > 0)
                        {
                                std::string AckResult = irc::stringjoiner(" ", Data.ack, 0, Data.ack.size() - 1).GetJoined();
                                user->WriteServ("CAP * ACK :%s", AckResult.c_str());
                        }

                        if (Data.wanted.size() > 0)
                        {
                                std::string NakResult = irc::stringjoiner(" ", Data.wanted, 0, Data.wanted.size() - 1).GetJoined();
                                user->WriteServ("CAP * NAK :%s", NakResult.c_str());
                        }
                }
                else if (subcommand == "END")
                {
                        user->Shrink("CAP_REGHOLD");
                }
                else if ((subcommand == "LS") || (subcommand == "LIST"))
                {
                        CapData Data;

                        Data.type = subcommand;
                        Data.user = user;
                        Data.creator = this->Creator;

                        user->Extend("CAP_REGHOLD");
                        Event event((char*) &Data, (Module*)this->Creator, subcommand == "LS" ? "cap_ls" : "cap_list");
                        event.Send(this->ServerInstance);

                        std::string Result;
                        if (Data.wanted.size() > 0)
                                Result = irc::stringjoiner(" ", Data.wanted, 0, Data.wanted.size() - 1).GetJoined();
                        else
                                Result = "";

                        user->WriteServ("CAP * %s :%s", subcommand.c_str(), Result.c_str());
                }
                else if (subcommand == "CLEAR")
                {
                        CapData Data;

                        Data.type = subcommand;
                        Data.user = user;
                        Data.creator = this->Creator;

                        user->Extend("CAP_REGHOLD");
                        Event event((char*) &Data, (Module*)this->Creator, "cap_clear");
                        event.Send(this->ServerInstance);

                        std::string Result = irc::stringjoiner(" ", Data.ack, 0, Data.ack.size() - 1).GetJoined();
                        user->WriteServ("CAP * ACK :%s", Result.c_str());
                }
                else
                {
                        user->WriteNumeric(ERR_INVALIDCAPSUBCOMMAND, "* %s :Invalid CAP subcommand", subcommand.c_str());
                }

                return CMD_FAILURE;
        }
};

class ModuleCAP : public Module
{
        CommandCAP* newcommand;
 public:
        ModuleCAP(InspIRCd* Me)
                : Module(Me)
        {
                // Create a new command
                newcommand = new CommandCAP(ServerInstance, this);
                ServerInstance->AddCommand(newcommand);

                Implementation eventlist[] = { I_OnCheckReady };
                ServerInstance->Modules->Attach(eventlist, this, 1);
        }

        virtual bool OnCheckReady(User* user)
        {
                /* Users in CAP state get held until CAP END */
                if (user->GetExt("CAP_REGHOLD"))
                        return false;

                return true;
        }

        virtual ~ModuleCAP()
        {
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_cap.cpp 10333 2008-08-28 15:40:16Z w00t $", VF_VENDOR, API_VERSION);
        }
};

MODULE_INIT(ModuleCAP)