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m_blockcaps.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 support to block all-CAPS channel messages and notices */


class BlockCaps : public SimpleChannelModeHandler
{
 public:
        BlockCaps(InspIRCd* Instance) : SimpleChannelModeHandler(Instance, 'B') { }
};

class ModuleBlockCAPS : public Module
{
        BlockCaps* bc;
        int percent;
        unsigned int minlen;
        char capsmap[256];
public:

        ModuleBlockCAPS(InspIRCd* Me) : Module(Me)
        {
                OnRehash(NULL,"");
                bc = new BlockCaps(ServerInstance);
                if (!ServerInstance->Modes->AddMode(bc))
                {
                        delete bc;
                        throw ModuleException("Could not add new modes!");
                }
                Implementation eventlist[] = { I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash, I_On005Numeric };
                ServerInstance->Modules->Attach(eventlist, this, 4);
        }

        virtual void On005Numeric(std::string &output)
        {
                ServerInstance->AddExtBanChar('B');
        }

        virtual void OnRehash(User* user, const std::string &param)
        {
                ReadConf();
        }

        virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
        {
                if (target_type == TYPE_CHANNEL)
                {
                        if ((!IS_LOCAL(user)) || (text.length() < minlen))
                                return 0;

                        Channel* c = (Channel*)dest;

                        if (CHANOPS_EXEMPT(ServerInstance, 'B') && c->GetStatus(user) == STATUS_OP)
                        {
                                return 0;
                        }

                        if (c->IsModeSet('B') || c->IsExtBanned(user, 'B'))
                        {
                                int caps = 0;
                                const char* actstr = "\1ACTION ";
                                int act = 0;

                                for (std::string::iterator i = text.begin(); i != text.end(); i++)
                                {
                                        /* Smart fix for suggestion from Jobe, ignore CTCP ACTION (part of /ME) */
                                        if (*actstr && *i == *actstr++ && act != -1)
                                        {
                                                act++;
                                                continue;
                                        }
                                        else
                                                act = -1;

                                        caps += capsmap[(unsigned char)*i];
                                }
                                if ( ((caps*100)/(int)text.length()) >= percent )
                                {
                                        user->WriteNumeric(ERR_CANNOTSENDTOCHAN, "%s %s :Your line cannot be more than %d%% capital letters if it is %d or more letters long", user->nick.c_str(), c->name.c_str(), percent, minlen);
                                        return 1;
                                }
                        }
                }
                return 0;
        }

        virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
        {
                return OnUserPreMessage(user,dest,target_type,text,status,exempt_list);
        }

        void ReadConf()
        {
                ConfigReader Conf(ServerInstance);
                percent = Conf.ReadInteger("blockcaps", "percent", "100", 0, true);
                minlen = Conf.ReadInteger("blockcaps", "minlen", "1", 0, true);
                std::string hmap = Conf.ReadValue("blockcaps", "capsmap", 0);
                if (hmap.empty())
                        hmap = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
                memset(capsmap, 0, sizeof(capsmap));
                for (std::string::iterator n = hmap.begin(); n != hmap.end(); n++)
                        capsmap[(unsigned char)*n] = 1;
                if (percent < 1 || percent > 100)
                {
                        ServerInstance->Logs->Log("CONFIG",DEFAULT, "<blockcaps:percent> out of range, setting to default of 100.");
                        percent = 100;
                }
                if (minlen < 1 || minlen > MAXBUF-1)
                {
                        ServerInstance->Logs->Log("CONFIG",DEFAULT, "<blockcaps:minlen> out of range, setting to default of 1.");
                        minlen = 1;
                }
        }

        virtual ~ModuleBlockCAPS()
        {
                ServerInstance->Modes->DelMode(bc);
                delete bc;
        }

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

MODULE_INIT(ModuleBlockCAPS)