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