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m_auditorium.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: Allows for auditorium channels (+u) where nobody can see others joining and parting or the nick list */

class AuditoriumMode : public ModeHandler
{
 public:
        AuditoriumMode(InspIRCd* Instance) : ModeHandler(Instance, 'u', 0, 0, false, MODETYPE_CHANNEL, false) { }

        ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding, bool)
        {
                if (channel->IsModeSet('u') != adding)
                {
                        if (IS_LOCAL(source) && (channel->GetStatus(source) < STATUS_OP))
                        {
                                source->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :Only channel operators may %sset channel mode +u", source->nick.c_str(), channel->name.c_str(), adding ? "" : "un");
                                return MODEACTION_DENY;
                        }
                        else
                        {
                                channel->SetMode('u', adding);
                                return MODEACTION_ALLOW;
                        }
                }
                else
                {
                        return MODEACTION_DENY;
                }
        }
};

class ModuleAuditorium : public Module
{
 private:
        AuditoriumMode* aum;
        bool ShowOps;
        bool OperOverride;
        CUList nl;
        CUList except_list;
 public:
        ModuleAuditorium(InspIRCd* Me)
                : Module(Me)
        {
                aum = new AuditoriumMode(ServerInstance);
                if (!ServerInstance->Modes->AddMode(aum))
                {
                        delete aum;
                        throw ModuleException("Could not add new modes!");
                }

                OnRehash(NULL, "");

                Implementation eventlist[] = { I_OnUserJoin, I_OnUserPart, I_OnUserKick, I_OnUserQuit, I_OnNamesListItem, I_OnRehash };
                Me->Modules->Attach(eventlist, this, 6);

        }

        virtual ~ModuleAuditorium()
        {
                ServerInstance->Modes->DelMode(aum);
                delete aum;
        }

        virtual void OnRehash(User* user, const std::string &parameter)
        {
                ConfigReader conf(ServerInstance);
                ShowOps = conf.ReadFlag("auditorium", "showops", 0);
                OperOverride = conf.ReadFlag("auditorium", "operoverride", 0);
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_auditorium.cpp 10291 2008-08-25 20:35:51Z w00t $", VF_COMMON | VF_VENDOR, API_VERSION);
        }

        virtual void OnNamesListItem(User* issuer, User* user, Channel* channel, std::string &prefixes, std::string &nick)
        {
                if (!channel->IsModeSet('u'))
                        return;

                /* Some module hid this from being displayed, dont bother */
                if (nick.empty())
                        return;

                /* If user is oper and operoverride is on, don't touch the list */
                if (OperOverride && IS_OPER(user))
                        return;

                if (ShowOps && (issuer != user) && (channel->GetStatus(user) < STATUS_OP))
                {
                        /* Showops is set, hide all non-ops from the user, except themselves */
                        nick.clear();
                        return;
                }

                if (!ShowOps && (issuer != user))
                {
                        /* ShowOps is not set, hide everyone except the user whos requesting NAMES */
                        nick.clear();
                        return;
                }
        }

        virtual void OnUserJoin(User* user, Channel* channel, bool sync, bool &silent)
        {
                if (channel->IsModeSet('u'))
                {
                        silent = true;
                        /* Because we silenced the event, make sure it reaches the user whos joining (but only them of course) */
                        user->WriteFrom(user, "JOIN %s", channel->name.c_str());
                        if (ShowOps)
                                channel->WriteAllExcept(user, false, channel->GetStatus(user) >= STATUS_OP ? 0 : '@', except_list, "JOIN %s", channel->name.c_str());
                }
        }

        void OnUserPart(User* user, Channel* channel, std::string &partmessage, bool &silent)
        {
                if (channel->IsModeSet('u'))
                {
                        silent = true;
                        /* Because we silenced the event, make sure it reaches the user whos leaving (but only them of course) */
                        user->WriteFrom(user, "PART %s%s%s", channel->name.c_str(),
                                        partmessage.empty() ? "" : " :",
                                        partmessage.empty() ? "" : partmessage.c_str());
                        if (ShowOps)
                        {
                                channel->WriteAllExcept(user, false, channel->GetStatus(user) >= STATUS_OP ? 0 : '@', except_list, "PART %s%s%s", channel->name.c_str(), partmessage.empty() ? "" : " :",
                                                partmessage.empty() ? "" : partmessage.c_str());
                        }
                }
        }

        void OnUserKick(User* source, User* user, Channel* chan, const std::string &reason, bool &silent)
        {
                if (chan->IsModeSet('u'))
                {
                        silent = true;
                        /* Send silenced event only to the user being kicked and the user doing the kick */
                        source->WriteFrom(source, "KICK %s %s %s", chan->name.c_str(), user->nick.c_str(), reason.c_str());
                        if (ShowOps)
                                chan->WriteAllExcept(source, false, chan->GetStatus(source) >= STATUS_OP ? 0 : '@', except_list, "KICK %s %s %s", chan->name.c_str(), user->nick.c_str(), reason.c_str());
                        else
                                user->WriteFrom(source, "KICK %s %s %s", chan->name.c_str(), user->nick.c_str(), reason.c_str());
                }
        }

        void OnUserQuit(User* user, const std::string &reason, const std::string &oper_message)
        {
                Command* parthandler = ServerInstance->Parser->GetHandler("PART");
                std::vector<std::string> to_leave;
                if (parthandler)
                {
                        for (UCListIter f = user->chans.begin(); f != user->chans.end(); f++)
                        {
                                if (f->first->IsModeSet('u'))
                                        to_leave.push_back(f->first->name);
                        }
                        /* We cant do this neatly in one loop, as we are modifying the map we are iterating */
                        for (std::vector<std::string>::iterator n = to_leave.begin(); n != to_leave.end(); n++)
                        {
                                std::vector<std::string> parameters;
                                parameters.push_back(*n);
                                /* This triggers our OnUserPart, above, making the PART silent */
                                parthandler->Handle(parameters, user);
                        }
                }
        }
};

MODULE_INIT(ModuleAuditorium)