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         }
  46
  47         virtual void On005Numeric(std::string &output)
  48         {
  49                 std::stringstream line(output);
  50                 std::string temp1, temp2;
  51                 while (!line.eof())
  52                 {
  53                         line >> temp1;
  54                         if (temp1.substr(0,10) == "CHANMODES=")
  55                         {
  56                                 // append the chanmode to the end
  57                                 temp1 = temp1.substr(10,temp1.length());
  58                                 temp1 = "CHANMODES=g" + temp1;
  59                         }
  60                         temp2 = temp2 + temp1 + " ";
  61                 }
  62                 if (temp2.length())
  63                         output = temp2.substr(0,temp2.length()-1);
  64         }
  65
  66         virtual void OnUserPart(userrec* user, chanrec* channel)
  67         {
  68                 // when the last user parts, delete the list
  69                 if (Srv->CountUsers(channel) == 1)
  70                 {
  71                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
  72                         if (spamlist)
  73                         {
  74                                 channel->Shrink("spam_list");
  75                                 delete spamlist;
  76                         }
  77                 }
  78         }
  79
  80         virtual void OnRehash(std::string parameter)
  81         {
  82                 delete Conf;
  83                 Conf = new ConfigReader;
  84                 // re-read our config options on a rehash
  85                 MaxEntries = Conf->ReadInteger("chanfilter","maxsize",0,true);
  86         }
  87
  88         virtual int ProcessMessages(userrec* user,chanrec* chan,std::string &text)
  89         {
  90                 char buffer[MAXBUF];
  91                 strlcpy(buffer,text.c_str(),MAXBUF);
  92                 for (unsigned int j = 0; j < strlen(buffer); j++)
  93                         buffer[j] = tolower(buffer[j]);
  94                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
  95                 if (spamlist)
  96                 {
  97                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
  98                         {
  99                                 if (strstr(text.c_str(),i->c_str()))
 100                                 {
 101                                         WriteServ(user->fd,"936 %s %s :Your message contained a censored word, and was blocked",user->nick, chan->name);
 102                                         return 1;
 103                                 }
 104                         }
 105                 }
 106                 return 0;
 107         }
 108
 109         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text)
 110         {
 111                 if (target_type == TYPE_CHANNEL)
 112                 {
 113                         return ProcessMessages(user,(chanrec*)dest,text);
 114                 }
 115                 else return 0;
 116         }
 117
 118         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text)
 119         {
 120                 if (target_type == TYPE_CHANNEL)
 121                 {
 122                         return ProcessMessages(user,(chanrec*)dest,text);
 123                 }
 124                 else return 0;
 125         }
 126
 127         virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list &params)
 128         {
 129                 if ((modechar == 'g') && (type == MT_CHANNEL))
 130                 {
 131                         chanrec* chan = (chanrec*)target;
 132
 133                         for (unsigned int j = 0; j < params[0].length(); j++)
 134                                 params[0][j] = tolower(params[0][j]);
 135
 136                         std::string param = params[0];
 137
 138                         if (mode_on)
 139                         {
 140                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 141                                 if (!spamlist)
 142                                 {
 143                                         spamlist = new SpamList;
 144                                         chan->Extend("spam_list",(char*)spamlist);
 145                                 }
 146                                 if (spamlist->size() < (unsigned)MaxEntries)
 147                                 {
 148                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 149                                         {
 150                                                 if (*i == params[0])
 151                                                 {
 152                                                         WriteServ(user->fd,"937 %s %s :The word %s is already on the spamfilter list",user->nick, chan->name,params[0].c_str());
 153                                                         return -1;
 154                                                 }
 155                                         }
 156                                         spamlist->push_back(params[0]);
 157                                         return 1;
 158                                 }
 159                                 WriteServ(user->fd,"939 %s %s :Channel spamfilter list is full",user->nick, chan->name);
 160                                 return -1;
 161                         }
 162                         else
 163                         {
 164                                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 165                                 if (spamlist)
 166                                 {
 167                                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 168                                         {
 169                                                 if (*i == params[0])
 170                                                 {
 171                                                         spamlist->erase(i);
 172                                                         return 1;
 173                                                 }
 174                                         }
 175                                 }
 176                                 WriteServ(user->fd,"938 %s %s :No such spamfilter word is set",user->nick, chan->name);
 177                                 return -1;
 178                         }
 179                         return -1;
 180                 }
 181                 return 0;
 182         }
 183
 184         virtual void OnSendList(userrec* user, chanrec* channel, char mode)
 185         {
 186                 if (mode == 'g')
 187                 {
 188                         SpamList* spamlist = (SpamList*)channel->GetExt("spam_list");
 189                         if (spamlist)
 190                         {
 191                                 for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 192                                 {
 193                                         WriteServ(user->fd,"941 %s %s %s",user->nick, channel->name,i->c_str());
 194                                 }
 195                         }
 196                         WriteServ(user->fd,"940 %s %s :End of channel spamfilter list",user->nick, channel->name);
 197                 }
 198         }
 199
 200         virtual ~ModuleChanFilter()
 201         {
 202                 delete Conf;
 203                 delete Srv;
 204         }
 205
 206         virtual Version GetVersion()
 207         {
 208                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
 209         }
 210
 211         virtual void OnSyncChannel(chanrec* chan, Module* proto, void* opaque)
 212         {
 213                 SpamList* spamlist = (SpamList*)chan->GetExt("spam_list");
 214                 string_list commands;
 215                 if (spamlist)
 216                 {
 217                         for (SpamList::iterator i = spamlist->begin(); i != spamlist->end(); i++)
 218                         {
 219                                 proto->ProtoSendMode(opaque,TYPE_CHANNEL,chan,"+g "+*i);
 220                         }
 221                 }
 222                 return commands;
 223         }
 224
 225 };
 226
 227
 228 class ModuleChanFilterFactory : public ModuleFactory
 229 {
 230  public:
 231         ModuleChanFilterFactory()
 232         {
 233         }
 234
 235         ~ModuleChanFilterFactory()
 236         {
 237         }
 238
 239         virtual Module * CreateModule()
 240         {
 241                 return new ModuleChanFilter;
 242         }
 243
 244 };
 245
 246
 247 extern "C" void * init_module( void )
 248 {
 249         return new ModuleChanFilterFactory;
 250 }
 251