src/modules/m_blockcaps.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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 #include "inspircd.h"
  15 #include "users.h"
  16 #include "channels.h"
  17 #include "modules.h"
  18 #include "mode.h"
  19
  20 /* $ModDesc: Provides support for channel mode +P to block all-CAPS channel messages and notices */
  21
  22
  23 /** Handles the +P channel mode
  24  */
  25 class BlockCaps : public ModeHandler
  26 {
  27  public:
  28         BlockCaps(InspIRCd* Instance) : ModeHandler(Instance, 'P', 0, 0, false, MODETYPE_CHANNEL, false) { }
  29
  30         ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
  31         {
  32                 if (adding)
  33                 {
  34                         if (!channel->IsModeSet('P'))
  35                         {
  36                                 channel->SetMode('P',true);
  37                                 return MODEACTION_ALLOW;
  38                         }
  39                 }
  40                 else
  41                 {
  42                         if (channel->IsModeSet('P'))
  43                         {
  44                                 channel->SetMode('P',false);
  45                                 return MODEACTION_ALLOW;
  46                         }
  47                 }
  48
  49                 return MODEACTION_DENY;
  50         }
  51 };
  52
  53 class ModuleBlockCAPS : public Module
  54 {
  55         BlockCaps* bc;
  56         int percent;
  57         unsigned int minlen;
  58         char capsmap[256];
  59 public:
  60
  61         ModuleBlockCAPS(InspIRCd* Me) : Module(Me)
  62         {
  63                 OnRehash(NULL,"");
  64                 bc = new BlockCaps(ServerInstance);
  65                 if (!ServerInstance->AddMode(bc, 'P'))
  66                         throw ModuleException("Could not add new modes!");
  67         }
  68
  69         void Implements(char* List)
  70         {
  71                 List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnRehash] = 1;
  72         }
  73
  74         virtual void OnRehash(userrec* user, const std::string &param)
  75         {
  76                 ReadConf();
  77         }
  78
  79         virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
  80         {
  81                 if (target_type == TYPE_CHANNEL)
  82                 {
  83                         if ((!IS_LOCAL(user)) || (text.length() < minlen))
  84                                 return 0;
  85
  86                         chanrec* c = (chanrec*)dest;
  87
  88                         if (c->IsModeSet('P'))
  89                         {
  90                                 int caps = 0;
  91                                 for (std::string::iterator i = text.begin(); i != text.end(); i++)
  92                                         caps += capsmap[(unsigned char)*i];
  93                                 if ( ((caps*100)/(int)text.length()) >= percent )
  94                                 {
  95                                         user->WriteServ( "404 %s %s :Your line cannot be more than %d%% capital letters if it is %d or more letters long", user->nick, c->name, percent, minlen);
  96                                         return 1;
  97                                 }
  98                         }
  99                 }
 100                 return 0;
 101         }
 102
 103         virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
 104         {
 105                 return OnUserPreMessage(user,dest,target_type,text,status,exempt_list);
 106         }
 107
 108         void ReadConf()
 109         {
 110                 ConfigReader Conf(ServerInstance);
 111                 percent = Conf.ReadInteger("blockcaps", "percent", "100", 0, true);
 112                 minlen = Conf.ReadInteger("blockcaps", "minlen", "0", 0, true);
 113                 std::string hmap = Conf.ReadValue("blockcaps", "capsmap", 0);
 114                 if (hmap.empty())
 115                         hmap = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 116                 memset(&capsmap, 0, 255);
 117                 for (std::string::iterator n = hmap.begin(); n != hmap.end(); n++)
 118                         capsmap[(unsigned char)*n] = 1;
 119                 if (percent < 0 || percent > 100)
 120                 {
 121                         ServerInstance->Log(DEFAULT, "<blockcaps:percent> out of range, setting to default of 100.");
 122                         percent = 100;
 123                 }
 124                 if (minlen < 0 || minlen > MAXBUF-1)
 125                 {
 126                         ServerInstance->Log(DEFAULT, "<blockcaps:minlen> out of range, setting to default of 0.");
 127                         minlen = 0;
 128                 }
 129         }
 130
 131         virtual ~ModuleBlockCAPS()
 132         {
 133                 ServerInstance->Modes->DelMode(bc);
 134                 DELETE(bc);
 135         }
 136
 137         virtual Version GetVersion()
 138         {
 139                 return Version(1,1,0,0,VF_COMMON|VF_VENDOR,API_VERSION);
 140         }
 141 };
 142
 143 MODULE_INIT(ModuleBlockCAPS);