src/modules/m_chanfilter.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <stdio.h>
  20 #include <string>
  21 #include <vector>
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "helperfuncs.h"
  26
  27 /* $ModDesc: Provides channel-specific censor lists (like mode +G but varies from channel to channel) */
  28
  29 typedef std::vector<std::string> SpamList;
  30
  31 class ModuleChanFilter : public Module
  32 {
  33         Server *Srv;
  34         ConfigReader *Conf;
  35         long MaxEntries;
  36
  37  public:
  38
  39         ModuleChanFilter()
  40         {
  41                 Srv = new Server;
  42                 Conf = new ConfigReader;
  43                 Srv->AddExtendedListMode('g');
  44                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  45                 if (MaxEntries == 0)
  46                         MaxEntries = 32;
  47         }
  48
  49         virtual void On005Numeric(std::string &output)
  50         {
  51                 std::stringstream line(output);
  52                 std::string temp1, temp2;
  53                 while (!line.eof())
  54                 {
  55                         line >> temp1;
  56                         if (temp1.substr(0,10) == "CHANMODES=")
  57                         {
  58                                 // append the chanmode to the end
  59                                 temp1 = temp1.substr(10,temp1.length());
  60                                 temp1 = "CHANMODES=g" + temp1;
  61                         }
  62                         temp2 = temp2 + temp1 + " ";
  63                 }
  64                 if (temp2.length())
  65                         output = temp2.substr(0,temp2.length()-1);
  66         }
  67
  68         virtual void OnUserPart(userrec* user, chanrec* channel)
  69         {
  70                 // when the last user parts, delete the list
  71                 if (Srv->CountUsers(channel) == 1)
  72                 {
  73                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
  74                         if (spamlist)
  75                         {
  76                                 channel->Shrink("spam_list");
  77                                 delete spamlist;
  78                         }
  79                 }
  80         }
  81
  82         virtual void OnRehash(std::string parameter)
  83         {
  84                 delete Conf;
  85                 Conf = new ConfigReader;
  86                 // re-read our config options on a rehash
  87                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  88         }
  89
  90         virtual int ProcessMessages(userrec* user,chanrec* chan,std::string &text)
  91         {
  92                 char buffer[MAXBUF];
  93                 strlcpy(buffer,text.c_str(),MAXBUF);
  94                 for (unsigned int j = 0; j < strlen(buffer); j++)
  95                         buffer[j] = tolower(buffer[j]);
  96                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
  97                 if (spamlist)
  98                 {
  99                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 100                         {
 101                                 if (strstr(text.c_str(),i->c_str()))
 102                                 {
 103                                         WriteServ(user->fd,"936 %s %s :Your message contained a censored word, and was blocked",user->nick, chan->name);
 104                                         return 1;
 105                                 }
 106                         }
 107                 }
 108                 return 0;
 109         }
 110
 111         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text)
 112         {
 113                 if (target_type == TYPE_CHANNEL)
 114                 {
 115                         return ProcessMessages(user,(chanrec*)dest,text);
 116                 }
 117                 else return 0;
 118         }
 119
 120         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text)
 121         {
 122                 if (target_type == TYPE_CHANNEL)
 123                 {
 124                         return ProcessMessages(user,(chanrec*)dest,text);
 125                 }
 126                 else return 0;
 127         }
 128
 129         virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list &params)
 130         {
 131                 if ((modechar == 'g') && (type == MT_CHANNEL))
 132                 {
 133                         chanrec* chan = (chanrec*)target;
 134
 135                         for (unsigned int j = 0; j < params[0].length(); j++)
 136                                 params[0][j] = tolower(params[0][j]);
 137
 138                         std::string param = params[0];
 139
 140                         if (mode_on)
 141                         {
 142                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 143                                 if (!spamlist)
 144                                 {
 145                                         spamlist = new SpamList;
 146                                         chan->Extend("spam_list",(char*)spamlist);
 147                                 }
 148                                 if (spamlist->size() < (unsigned)MaxEntries)
 149                                 {
 150                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 151                                         {
 152                                                 if (*i == params[0])
 153                                                 {
 154                                                         WriteServ(user->fd,"937 %s %s :The word %s is already on the spamfilter list",user->nick, chan->name,params[0].c_str());
 155                                                         return -1;
 156                                                 }
 157                                         }
 158                                         spamlist->push_back(params[0]);
 159                                         return 1;
 160                                 }
 161                                 WriteServ(user->fd,"939 %s %s :Channel spamfilter list is full",user->nick, chan->name);
 162                                 return -1;
 163                         }
 164                         else
 165                         {
 166                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 167                                 if (spamlist)
 168                                 {
 169                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 170                                         {
 171                                                 if (*i == params[0])
 172                                                 {
 173                                                         spamlist->erase(i);
 174                                                         return 1;
 175                                                 }
 176                                         }
 177                                 }
 178                                 WriteServ(user->fd,"938 %s %s :No such spamfilter word is set",user->nick, chan->name);
 179                                 return -1;
 180                         }
 181                         return -1;
 182                 }
 183                 return 0;
 184         }
 185
 186         virtual void OnSendList(userrec* user, chanrec* channel, char mode)
 187         {
 188                 if (mode == 'g')
 189                 {
 190                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
 191                         if (spamlist)
 192                         {
 193                                 for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 194                                 {
 195                                         WriteServ(user->fd,"941 %s %s %s",user->nick, channel->name,i->c_str());
 196                                 }
 197                         }
 198                         WriteServ(user->fd,"940 %s %s :End of channel spamfilter list",user->nick, channel->name);
 199                 }
 200         }
 201
 202         virtual ~ModuleChanFilter()
 203         {
 204                 delete Conf;
 205                 delete Srv;
 206         }
 207
 208         virtual Version GetVersion()
 209         {
 210                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 211         }
 212
 213         virtual void OnSyncChannel(chanrec* chan, Module* proto, void* opaque)
 214         {
 215                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 216                 string_list commands;
 217                 if (spamlist)
 218                 {
 219                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 220                         {
 221                                 proto->ProtoSendMode(opaque,TYPE_CHANNEL,chan,"+g "+*i);
 222                         }
 223                 }
 224         }
 225
 226 };
 227
 228
 229 class ModuleChanFilterFactory : public ModuleFactory
 230 {
 231  public:
 232         ModuleChanFilterFactory()
 233         {
 234         }
 235
 236         ~ModuleChanFilterFactory()
 237         {
 238         }
 239
 240         virtual Module * CreateModule()
 241         {
 242                 return new ModuleChanFilter;
 243         }
 244
 245 };
 246
 247
 248 extern "C" void * init_module( void )
 249 {
 250         return new ModuleChanFilterFactory;
 251 }
 252