src/modules/m_censor.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #define _CRT_SECURE_NO_DEPRECATE
  15 #define _SCL_SECURE_NO_DEPRECATE
  16
  17 #include "inspircd.h"
  18
  19 typedef std::map<irc::string,irc::string> censor_t;
  20
  21 /* $ModDesc: Provides user and channel +G mode */
  22
  23 /** Handles usermode +G
  24  */
  25 class CensorUser : public ModeHandler
  26 {
  27  public:
  28         CensorUser(InspIRCd* Instance) : ModeHandler(Instance, 'G', 0, 0, false, MODETYPE_USER, false) { }
  29
  30         ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
  31         {
  32                 if (adding)
  33                 {
  34                         if (!dest->IsModeSet('G'))
  35                         {
  36                                 dest->SetMode('G',true);
  37                                 return MODEACTION_ALLOW;
  38                         }
  39                 }
  40                 else
  41                 {
  42                         if (dest->IsModeSet('G'))
  43                         {
  44                                 dest->SetMode('G',false);
  45                                 return MODEACTION_ALLOW;
  46                         }
  47                 }
  48
  49                 return MODEACTION_DENY;
  50         }
  51 };
  52
  53 /** Handles channel mode +G
  54  */
  55 class CensorChannel : public ModeHandler
  56 {
  57  public:
  58         CensorChannel(InspIRCd* Instance) : ModeHandler(Instance, 'G', 0, 0, false, MODETYPE_CHANNEL, false) { }
  59
  60         ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
  61         {
  62                 if (adding)
  63                 {
  64                         if (!channel->IsModeSet('G'))
  65                         {
  66                                 channel->SetMode('G',true);
  67                                 return MODEACTION_ALLOW;
  68                         }
  69                 }
  70                 else
  71                 {
  72                         if (channel->IsModeSet('G'))
  73                         {
  74                                 channel->SetMode('G',false);
  75                                 return MODEACTION_ALLOW;
  76                         }
  77                 }
  78
  79                 return MODEACTION_ALLOW;
  80         }
  81 };
  82
  83 class ModuleCensor : public Module
  84 {
  85
  86
  87         censor_t censors;
  88         CensorUser *cu;
  89         CensorChannel *cc;
  90
  91  public:
  92         ModuleCensor(InspIRCd* Me)
  93                 : Module(Me)
  94         {
  95                 /* Read the configuration file on startup.
  96                  */
  97                 OnRehash(NULL,"");
  98                 cu = new CensorUser(ServerInstance);
  99                 cc = new CensorChannel(ServerInstance);
 100                 if (!ServerInstance->AddMode(cu) || !ServerInstance->AddMode(cc))
 101                 {
 102                         delete cu;
 103                         delete cc;
 104                         throw ModuleException("Could not add new modes!");
 105                 }
 106                 Implementation eventlist[] = { I_OnRehash, I_OnUserPreMessage, I_OnUserPreNotice };
 107                 ServerInstance->Modules->Attach(eventlist, this, 3);
 108         }
 109
 110
 111         virtual ~ModuleCensor()
 112         {
 113                 ServerInstance->Modes->DelMode(cu);
 114                 ServerInstance->Modes->DelMode(cc);
 115                 delete cu;
 116                 delete cc;
 117         }
 118
 119         virtual void ReplaceLine(irc::string &text, irc::string pattern, irc::string replace)
 120         {
 121                 if ((!pattern.empty()) && (!text.empty()))
 122                 {
 123                         std::string::size_type pos;
 124                         while ((pos = text.find(pattern)) != irc::string::npos)
 125                         {
 126                                 text.erase(pos,pattern.length());
 127                                 text.insert(pos,replace);
 128                         }
 129                 }
 130         }
 131
 132         // format of a config entry is <badword text="shit" replace="poo">
 133         virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 134         {
 135                 if (!IS_LOCAL(user))
 136                         return 0;
 137
 138                 bool active = false;
 139
 140                 if (target_type == TYPE_USER)
 141                         active = ((User*)dest)->IsModeSet('G');
 142                 else if (target_type == TYPE_CHANNEL)
 143                         active = ((Channel*)dest)->IsModeSet('G');
 144
 145                 if (!active)
 146                         return 0;
 147
 148                 irc::string text2 = text.c_str();
 149                 for (censor_t::iterator index = censors.begin(); index != censors.end(); index++)
 150                 {
 151                         if (text2.find(index->first) != irc::string::npos)
 152                         {
 153                                 if (index->second.empty())
 154                                 {
 155                                         user->WriteServ("936 %s %s %s :Your message contained a censored word, and was blocked", user->nick, ((Channel*)dest)->name, index->first.c_str());
 156                                         return 1;
 157                                 }
 158
 159                                 this->ReplaceLine(text2,index->first,index->second);
 160                         }
 161                 }
 162                 text = text2.c_str();
 163                 return 0;
 164         }
 165
 166         virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 167         {
 168                 return OnUserPreMessage(user,dest,target_type,text,status,exempt_list);
 169         }
 170
 171         virtual void OnRehash(User* user, const std::string &parameter)
 172         {
 173                 /*
 174                  * reload our config file on rehash - we must destroy and re-allocate the classes
 175                  * to call the constructor again and re-read our data.
 176                  */
 177                 ConfigReader* MyConf = new ConfigReader(ServerInstance);
 178                 censors.clear();
 179
 180                 for (int index = 0; index < MyConf->Enumerate("badword"); index++)
 181                 {
 182                         irc::string pattern = (MyConf->ReadValue("badword","text",index)).c_str();
 183                         irc::string replace = (MyConf->ReadValue("badword","replace",index)).c_str();
 184                         censors[pattern] = replace;
 185                 }
 186
 187                 delete MyConf;
 188         }
 189
 190         virtual Version GetVersion()
 191         {
 192                 return Version(1,1,0,0,VF_COMMON|VF_VENDOR,API_VERSION);
 193         }
 194
 195 };
 196
 197 MODULE_INIT(ModuleCensor)