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m_kicknorejoin.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"

/* $ModDesc: Provides channel mode +J (delay rejoin after kick) */

inline int strtoint(const std::string &str)
{
        std::istringstream ss(str);
        int result;
        ss >> result;
        return result;
}

typedef std::map<User*, time_t> delaylist;

class KickRejoin : public ModeHandler
{
 public:
        KickRejoin(InspIRCd* Instance) : ModeHandler(Instance, 'J', 1, 0, false, MODETYPE_CHANNEL, false) { }

        ModePair ModeSet(User* source, User* dest, Channel* channel, const std::string &parameter)
        {
                if (channel->IsModeSet('J'))
                        return std::make_pair(true, channel->GetModeParameter('J'));
                else
                        return std::make_pair(false, parameter);
        }

        bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, Channel* channel)
        {
                /* When TS is equal, the alphabetically later one wins */
                return (their_param < our_param);
        }

        ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding, bool)
        {
                if (!adding)
                {
                        // Taking the mode off, we need to clean up.
                        delaylist* dl;

                        if (channel->GetExt("norejoinusers", dl))
                        {
                                delete dl;
                                channel->Shrink("norejoinusers");
                        }

                        if (!channel->IsModeSet('J'))
                        {
                                return MODEACTION_DENY;
                        }
                        else
                        {
                                channel->SetMode('J', false);
                                return MODEACTION_ALLOW;
                        }
                }
                else if (atoi(parameter.c_str()) > 0)
                {
                        if (!channel->IsModeSet('J'))
                        {
                                parameter = ConvToStr(atoi(parameter.c_str()));
                                channel->SetModeParam('J', parameter.c_str(), adding);
                                channel->SetMode('J', adding);
                                return MODEACTION_ALLOW;
                        }
                        else
                        {
                                std::string cur_param = channel->GetModeParameter('J');
                                if (cur_param == parameter)
                                {
                                        // mode params match, don't change mode
                                        return MODEACTION_DENY;
                                }
                                else
                                {
                                        // new mode param, replace old with new
                                        parameter = ConvToStr(atoi(parameter.c_str()));
                                        cur_param = ConvToStr(atoi(cur_param.c_str()));
                                        if (parameter != "0")
                                        {
                                                channel->SetModeParam('J', cur_param.c_str(), false);
                                                channel->SetModeParam('J', parameter.c_str(), adding);
                                                return MODEACTION_ALLOW;
                                        }
                                        else
                                        {
                                                /* Fix to jamie's fix, dont allow +J 0 on the new value! */
                                                return MODEACTION_DENY;
                                        }
                                }
                        }
                }
                else
                {
                        return MODEACTION_DENY;
                }
        }
};

class ModuleKickNoRejoin : public Module
{

        KickRejoin* kr;

public:

        ModuleKickNoRejoin(InspIRCd* Me)
                : Module(Me)
        {

                kr = new KickRejoin(ServerInstance);
                if (!ServerInstance->Modes->AddMode(kr))
                        throw ModuleException("Could not add new modes!");
                Implementation eventlist[] = { I_OnCleanup, I_OnChannelDelete, I_OnUserPreJoin, I_OnUserKick };
                ServerInstance->Modules->Attach(eventlist, this, 4);
        }

        virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
        {
                if (chan)
                {
                        delaylist* dl;
                        if (chan->GetExt("norejoinusers", dl))
                        {
                                std::vector<User*> itemstoremove;

                                for (delaylist::iterator iter = dl->begin(); iter != dl->end(); iter++)
                                {
                                        if (iter->second > ServerInstance->Time())
                                        {
                                                if (iter->first == user)
                                                {
                                                        user->WriteNumeric(ERR_DELAYREJOIN, "%s %s :You must wait %s seconds after being kicked to rejoin (+J)", user->nick.c_str(), chan->name.c_str(), chan->GetModeParameter('J').c_str());
                                                        return 1;
                                                }
                                        }
                                        else
                                        {
                                                // Expired record, remove.
                                                itemstoremove.push_back(iter->first);
                                        }
                                }

                                for (unsigned int i = 0; i < itemstoremove.size(); i++)
                                        dl->erase(itemstoremove[i]);

                                if (!dl->size())
                                {
                                        // Now it's empty..
                                        delete dl;
                                        chan->Shrink("norejoinusers");
                                }
                        }
                }
                return 0;
        }

        virtual void OnUserKick(User* source, User* user, Channel* chan, const std::string &reason, bool &silent)
        {
                if (chan->IsModeSet('J') && (source != user))
                {
                        delaylist* dl;
                        if (!chan->GetExt("norejoinusers", dl))
                        {
                                dl = new delaylist;
                                chan->Extend("norejoinusers", dl);
                        }
                        (*dl)[user] = ServerInstance->Time() + strtoint(chan->GetModeParameter('J'));
                }
        }

        virtual void OnChannelDelete(Channel* chan)
        {
                delaylist* dl;

                if (chan->GetExt("norejoinusers", dl))
                {
                        delete dl;
                        chan->Shrink("norejoinusers");
                }
        }

        virtual void OnCleanup(int target_type, void* item)
        {
                if(target_type == TYPE_CHANNEL)
                        OnChannelDelete((Channel*)item);
        }


        virtual ~ModuleKickNoRejoin()
        {
                ServerInstance->Modes->DelMode(kr);
                delete kr;
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_kicknorejoin.cpp 10783 2008-11-01 23:02:23Z w00t $", VF_COMMON | VF_VENDOR, API_VERSION);
        }
};


MODULE_INIT(ModuleKickNoRejoin)