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 SimpleUserModeHandler
  26 {
  27  public:
  28         CensorUser(InspIRCd* Instance) : SimpleUserModeHandler(Instance, 'G') { }
  29 };
  30
  31 /** Handles channel mode +G
  32  */
  33 class CensorChannel : public SimpleChannelModeHandler
  34 {
  35  public:
  36         CensorChannel(InspIRCd* Instance) : SimpleChannelModeHandler(Instance, 'G') { }
  37 };
  38
  39 class ModuleCensor : public Module
  40 {
  41
  42
  43         censor_t censors;
  44         CensorUser *cu;
  45         CensorChannel *cc;
  46
  47  public:
  48         ModuleCensor(InspIRCd* Me)
  49                 : Module(Me)
  50         {
  51                 /* Read the configuration file on startup.
  52                  */
  53                 OnRehash(NULL,"");
  54                 cu = new CensorUser(ServerInstance);
  55                 cc = new CensorChannel(ServerInstance);
  56                 if (!ServerInstance->Modes->AddMode(cu) || !ServerInstance->Modes->AddMode(cc))
  57                 {
  58                         delete cu;
  59                         delete cc;
  60                         throw ModuleException("Could not add new modes!");
  61                 }
  62                 Implementation eventlist[] = { I_OnRehash, I_OnUserPreMessage, I_OnUserPreNotice };
  63                 ServerInstance->Modules->Attach(eventlist, this, 3);
  64         }
  65
  66
  67         virtual ~ModuleCensor()
  68         {
  69                 ServerInstance->Modes->DelMode(cu);
  70                 ServerInstance->Modes->DelMode(cc);
  71                 delete cu;
  72                 delete cc;
  73         }
  74
  75         virtual void ReplaceLine(irc::string &text, irc::string pattern, irc::string replace)
  76         {
  77                 if ((!pattern.empty()) && (!text.empty()))
  78                 {
  79                         std::string::size_type pos;
  80                         while ((pos = text.find(pattern)) != irc::string::npos)
  81                         {
  82                                 text.erase(pos,pattern.length());
  83                                 text.insert(pos,replace);
  84                         }
  85                 }
  86         }
  87
  88         // format of a config entry is <badword text="shit" replace="poo">
  89         virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
  90         {
  91                 if (!IS_LOCAL(user))
  92                         return 0;
  93
  94                 bool active = false;
  95
  96                 if (target_type == TYPE_USER)
  97                         active = ((User*)dest)->IsModeSet('G');
  98                 else if (target_type == TYPE_CHANNEL)
  99                 {
 100                         active = ((Channel*)dest)->IsModeSet('G');
 101                         Channel* c = (Channel*)dest;
 102                         if (CHANOPS_EXEMPT(ServerInstance, 'G') && c->GetStatus(user) == STATUS_OP)
 103                         {
 104                                 return 0;
 105                         }
 106                 }
 107
 108                 if (!active)
 109                         return 0;
 110
 111                 irc::string text2 = text.c_str();
 112                 for (censor_t::iterator index = censors.begin(); index != censors.end(); index++)
 113                 {
 114                         if (text2.find(index->first) != irc::string::npos)
 115                         {
 116                                 if (index->second.empty())
 117                                 {
 118                                         user->WriteNumeric(936, "%s %s %s :Your message contained a censored word, and was blocked", user->nick.c_str(), ((Channel*)dest)->name.c_str(), index->first.c_str());
 119                                         return 1;
 120                                 }
 121
 122                                 this->ReplaceLine(text2,index->first,index->second);
 123                         }
 124                 }
 125                 text = text2.c_str();
 126                 return 0;
 127         }
 128
 129         virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 130         {
 131                 return OnUserPreMessage(user,dest,target_type,text,status,exempt_list);
 132         }
 133
 134         virtual void OnRehash(User* user, const std::string &parameter)
 135         {
 136                 /*
 137                  * reload our config file on rehash - we must destroy and re-allocate the classes
 138                  * to call the constructor again and re-read our data.
 139                  */
 140                 ConfigReader* MyConf = new ConfigReader(ServerInstance);
 141                 censors.clear();
 142
 143                 for (int index = 0; index < MyConf->Enumerate("badword"); index++)
 144                 {
 145                         irc::string pattern = (MyConf->ReadValue("badword","text",index)).c_str();
 146                         irc::string replace = (MyConf->ReadValue("badword","replace",index)).c_str();
 147                         censors[pattern] = replace;
 148                 }
 149
 150                 delete MyConf;
 151         }
 152
 153         virtual Version GetVersion()
 154         {
 155                 return Version(1,2,0,0,VF_COMMON|VF_VENDOR,API_VERSION);
 156         }
 157
 158 };
 159
 160 MODULE_INIT(ModuleCensor)