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