src/modules/m_blockcaps.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15
  16 /* $ModDesc: Provides support to block all-CAPS channel messages and notices */
  17
  18
  19 /** Handles the +P channel mode
  20  */
  21 class BlockCaps : public SimpleChannelModeHandler
  22 {
  23  public:
  24         BlockCaps(InspIRCd* Instance, Module* Creator) : SimpleChannelModeHandler(Instance, Creator, 'B') { }
  25 };
  26
  27 class ModuleBlockCAPS : public Module
  28 {
  29         BlockCaps bc;
  30         int percent;
  31         unsigned int minlen;
  32         char capsmap[256];
  33 public:
  34
  35         ModuleBlockCAPS(InspIRCd* Me) : Module(Me), bc(Me, this)
  36         {
  37                 OnRehash(NULL);
  38                 if (!ServerInstance->Modes->AddMode(&bc))
  39                         throw ModuleException("Could not add new modes!");
  40                 Implementation eventlist[] = { I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash, I_On005Numeric };
  41                 ServerInstance->Modules->Attach(eventlist, this, 4);
  42         }
  43
  44         virtual void On005Numeric(std::string &output)
  45         {
  46                 ServerInstance->AddExtBanChar('B');
  47         }
  48
  49         virtual void OnRehash(User* user)
  50         {
  51                 ReadConf();
  52         }
  53
  54         virtual ModResult OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
  55         {
  56                 if (target_type == TYPE_CHANNEL)
  57                 {
  58                         if ((!IS_LOCAL(user)) || (text.length() < minlen))
  59                                 return MOD_RES_PASSTHRU;
  60
  61                         Channel* c = (Channel*)dest;
  62
  63                         if (CHANOPS_EXEMPT(ServerInstance, 'B') && c->GetPrefixValue(user) == OP_VALUE)
  64                         {
  65                                 return MOD_RES_PASSTHRU;
  66                         }
  67
  68                         if (!c->GetExtBanStatus(user, 'B').check(!c->IsModeSet('B')))
  69                         {
  70                                 int caps = 0;
  71                                 const char* actstr = "\1ACTION ";
  72                                 int act = 0;
  73
  74                                 for (std::string::iterator i = text.begin(); i != text.end(); i++)
  75                                 {
  76                                         /* Smart fix for suggestion from Jobe, ignore CTCP ACTION (part of /ME) */
  77                                         if (*actstr && *i == *actstr++ && act != -1)
  78                                         {
  79                                                 act++;
  80                                                 continue;
  81                                         }
  82                                         else
  83                                                 act = -1;
  84
  85                                         caps += capsmap[(unsigned char)*i];
  86                                 }
  87                                 if ( ((caps*100)/(int)text.length()) >= percent )
  88                                 {
  89                                         user->WriteNumeric(ERR_CANNOTSENDTOCHAN, "%s %s :Your message cannot contain more than %d%% capital letters if it's longer than %d characters", user->nick.c_str(), c->name.c_str(), percent, minlen);
  90                                         return MOD_RES_DENY;
  91                                 }
  92                         }
  93                 }
  94                 return MOD_RES_PASSTHRU;
  95         }
  96
  97         virtual ModResult OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
  98         {
  99                 return OnUserPreMessage(user,dest,target_type,text,status,exempt_list);
 100         }
 101
 102         void ReadConf()
 103         {
 104                 ConfigReader Conf(ServerInstance);
 105                 percent = Conf.ReadInteger("blockcaps", "percent", "100", 0, true);
 106                 minlen = Conf.ReadInteger("blockcaps", "minlen", "1", 0, true);
 107                 std::string hmap = Conf.ReadValue("blockcaps", "capsmap", 0);
 108                 if (hmap.empty())
 109                         hmap = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 110                 memset(capsmap, 0, sizeof(capsmap));
 111                 for (std::string::iterator n = hmap.begin(); n != hmap.end(); n++)
 112                         capsmap[(unsigned char)*n] = 1;
 113                 if (percent < 1 || percent > 100)
 114                 {
 115                         ServerInstance->Logs->Log("CONFIG",DEFAULT, "<blockcaps:percent> out of range, setting to default of 100.");
 116                         percent = 100;
 117                 }
 118                 if (minlen < 1 || minlen > MAXBUF-1)
 119                 {
 120                         ServerInstance->Logs->Log("CONFIG",DEFAULT, "<blockcaps:minlen> out of range, setting to default of 1.");
 121                         minlen = 1;
 122                 }
 123         }
 124
 125         virtual ~ModuleBlockCAPS()
 126         {
 127                 ServerInstance->Modes->DelMode(&bc);
 128         }
 129
 130         virtual Version GetVersion()
 131         {
 132                 return Version("Provides support to block all-CAPS channel messages and notices", VF_COMMON|VF_VENDOR,API_VERSION);
 133         }
 134 };
 135
 136 MODULE_INIT(ModuleBlockCAPS)