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) : SimpleChannelModeHandler(Instance, '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)
  36         {
  37                 OnRehash(NULL,"");
  38                 bc = new BlockCaps(ServerInstance);
  39                 if (!ServerInstance->Modes->AddMode(bc))
  40                 {
  41                         delete bc;
  42                         throw ModuleException("Could not add new modes!");
  43                 }
  44                 Implementation eventlist[] = { I_OnUserPreMessage, I_OnUserPreNotice, I_OnRehash, I_On005Numeric };
  45                 ServerInstance->Modules->Attach(eventlist, this, 4);
  46         }
  47
  48         virtual void On005Numeric(std::string &output)
  49         {
  50                 ServerInstance->AddExtBanChar('B');
  51         }
  52
  53         virtual void OnRehash(User* user, const std::string &param)
  54         {
  55                 ReadConf();
  56         }
  57
  58         virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
  59         {
  60                 if (target_type == TYPE_CHANNEL)
  61                 {
  62                         if ((!IS_LOCAL(user)) || (text.length() < minlen))
  63                                 return 0;
  64
  65                         Channel* c = (Channel*)dest;
  66
  67                         if (CHANOPS_EXEMPT(ServerInstance, 'B') && c->GetStatus(user) == STATUS_OP)
  68                         {
  69                                 return 0;
  70                         }
  71
  72                         if (c->IsModeSet('B') || c->GetExtBanStatus(user, 'B') < 0)
  73                         {
  74                                 int caps = 0;
  75                                 const char* actstr = "\1ACTION ";
  76                                 int act = 0;
  77
  78                                 for (std::string::iterator i = text.begin(); i != text.end(); i++)
  79                                 {
  80                                         /* Smart fix for suggestion from Jobe, ignore CTCP ACTION (part of /ME) */
  81                                         if (*actstr && *i == *actstr++ && act != -1)
  82                                         {
  83                                                 act++;
  84                                                 continue;
  85                                         }
  86                                         else
  87                                                 act = -1;
  88
  89                                         caps += capsmap[(unsigned char)*i];
  90                                 }
  91                                 if ( ((caps*100)/(int)text.length()) >= percent )
  92                                 {
  93                                         user->WriteNumeric(ERR_CANNOTSENDTOCHAN, "%s %s :Your line cannot be more than %d%% capital letters if it is %d or more letters long", user->nick.c_str(), c->name.c_str(), percent, minlen);
  94                                         return 1;
  95                                 }
  96                         }
  97                 }
  98                 return 0;
  99         }
 100
 101         virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 102         {
 103                 return OnUserPreMessage(user,dest,target_type,text,status,exempt_list);
 104         }
 105
 106         void ReadConf()
 107         {
 108                 ConfigReader Conf(ServerInstance);
 109                 percent = Conf.ReadInteger("blockcaps", "percent", "100", 0, true);
 110                 minlen = Conf.ReadInteger("blockcaps", "minlen", "1", 0, true);
 111                 std::string hmap = Conf.ReadValue("blockcaps", "capsmap", 0);
 112                 if (hmap.empty())
 113                         hmap = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 114                 memset(capsmap, 0, sizeof(capsmap));
 115                 for (std::string::iterator n = hmap.begin(); n != hmap.end(); n++)
 116                         capsmap[(unsigned char)*n] = 1;
 117                 if (percent < 1 || percent > 100)
 118                 {
 119                         ServerInstance->Logs->Log("CONFIG",DEFAULT, "<blockcaps:percent> out of range, setting to default of 100.");
 120                         percent = 100;
 121                 }
 122                 if (minlen < 1 || minlen > MAXBUF-1)
 123                 {
 124                         ServerInstance->Logs->Log("CONFIG",DEFAULT, "<blockcaps:minlen> out of range, setting to default of 1.");
 125                         minlen = 1;
 126                 }
 127         }
 128
 129         virtual ~ModuleBlockCAPS()
 130         {
 131                 ServerInstance->Modes->DelMode(bc);
 132                 delete bc;
 133         }
 134
 135         virtual Version GetVersion()
 136         {
 137                 return Version("$Id$", VF_COMMON|VF_VENDOR,API_VERSION);
 138         }
 139 };
 140
 141 MODULE_INIT(ModuleBlockCAPS)