src/modules/m_alias.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *   E-mail:
   7  *      <brain@chatspike.net>
   8  *      <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include "users.h"
  20 #include "channels.h"
  21 #include "modules.h"
  22 #include "inspircd.h"
  23 #include <vector>
  24
  25 /* $ModDesc: Provides aliases of commands. */
  26
  27 /** An alias definition
  28  */
  29 class Alias : public classbase
  30 {
  31  public:
  32         /** The text of the alias command */
  33         irc::string text;
  34         /** Text to replace with */
  35         std::string replace_with;
  36         /** Nickname required to perform alias */
  37         std::string requires;
  38         /** Alias requires ulined server */
  39         bool uline;
  40 };
  41
  42 class ModuleAlias : public Module
  43 {
  44  private:
  45         std::vector<Alias> Aliases;
  46         std::vector<std::string> pars;
  47
  48         virtual void ReadAliases()
  49         {
  50                 ConfigReader MyConf(ServerInstance);
  51
  52                 Aliases.clear();
  53
  54                 for (int i = 0; i < MyConf.Enumerate("alias"); i++)
  55                 {
  56                         Alias a;
  57                         std::string txt;
  58                         txt = MyConf.ReadValue("alias", "text", i);
  59                         a.text = txt.c_str();
  60                         a.replace_with = MyConf.ReadValue("alias", "replace", i);
  61                         a.requires = MyConf.ReadValue("alias", "requires", i);
  62                         a.uline = MyConf.ReadFlag("alias", "uline", i);
  63
  64                         Aliases.push_back(a);
  65                 }
  66
  67         }
  68
  69  public:
  70
  71         ModuleAlias(InspIRCd* Me)
  72                 : Module::Module(Me)
  73         {
  74                 ReadAliases();
  75                 pars.resize(127);
  76         }
  77
  78         void Implements(char* List)
  79         {
  80                 List[I_OnPreCommand] = List[I_OnRehash] = 1;
  81         }
  82
  83         virtual ~ModuleAlias()
  84         {
  85         }
  86
  87         virtual Version GetVersion()
  88         {
  89                 return Version(1,0,0,1,VF_VENDOR);
  90         }
  91
  92         std::string GetVar(std::string varname, const std::string &original_line)
  93         {
  94                 irc::spacesepstream ss(original_line);
  95                 varname.erase(varname.begin());
  96                 int index = *(varname.begin()) - 48;
  97                 varname.erase(varname.begin());
  98                 bool everything_after = (varname == "-");
  99                 std::string word = "";
 100
 101                 ServerInstance->Log(DEBUG,"Get var %d%s", index , everything_after ? " and all after it" : "");
 102
 103                 for (int j = 0; j < index; j++)
 104                         word = ss.GetToken();
 105
 106                 if (everything_after)
 107                 {
 108                         std::string more = "*";
 109                         while ((more = ss.GetToken()) != "")
 110                         {
 111                                 word.append(" ");
 112                                 word.append(more);
 113                         }
 114                 }
 115
 116                 ServerInstance->Log(DEBUG,"Var is '%s'", word.c_str());
 117
 118                 return word;
 119         }
 120
 121         void SearchAndReplace(std::string& newline, const std::string &find, const std::string &replace)
 122         {
 123                 std::string::size_type x = newline.find(find);
 124                 while (x != std::string::npos)
 125                 {
 126                         newline.erase(x, find.length());
 127                         newline.insert(x, replace);
 128                         x = newline.find(find);
 129                 }
 130         }
 131
 132         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
 133         {
 134                 userrec *u = NULL;
 135                 irc::string c = command.c_str();
 136                 /* If the command is valid, we dont want to know,
 137                  * and if theyre not registered yet, we dont want
 138                  * to know either
 139                  */
 140                 if ((validated) || (user->registered != REG_ALL))
 141                         return 0;
 142
 143                 for (unsigned int i = 0; i < Aliases.size(); i++)
 144                 {
 145                         if (Aliases[i].text == c)
 146                         {
 147                                 if (Aliases[i].requires != "")
 148                                 {
 149                                         u = ServerInstance->FindNick(Aliases[i].requires);
 150                                         if (!u)
 151                                         {
 152                                                 user->WriteServ("401 "+std::string(user->nick)+" "+Aliases[i].requires+" :is currently unavailable. Please try again later.");
 153                                                 return 1;
 154                                         }
 155                                 }
 156                                 if ((u != NULL) && (Aliases[i].requires != "") && (Aliases[i].uline))
 157                                 {
 158                                         if (!ServerInstance->ULine(u->server))
 159                                         {
 160                                                 ServerInstance->WriteOpers("*** NOTICE -- Service "+Aliases[i].requires+" required by alias "+std::string(Aliases[i].text.c_str())+" is not on a u-lined server, possibly underhanded antics detected!");
 161                                                 user->WriteServ("401 "+std::string(user->nick)+" "+Aliases[i].requires+" :is an imposter! Please inform an IRC operator as soon as possible.");
 162                                                 return 1;
 163                                         }
 164                                 }
 165
 166                                 /* Now, search and replace in a copy of the original_line, replacing $1 through $9 and $1- etc */
 167
 168                                 std::string newline = Aliases[i].replace_with;
 169
 170                                 for (int v = 1; v < 10; v++)
 171                                 {
 172                                         std::string var = "$";
 173                                         var.append(ConvToStr(v));
 174                                         var.append("-");
 175                                         std::string::size_type x = newline.find(var);
 176
 177                                         while (x != std::string::npos)
 178                                         {
 179                                                 newline.erase(x, var.length());
 180                                                 newline.insert(x, GetVar(var, original_line));
 181                                                 x = newline.find(var);
 182                                         }
 183
 184                                         var = "$";
 185                                         var.append(ConvToStr(v));
 186                                         x = newline.find(var);
 187
 188                                         while (x != std::string::npos)
 189                                         {
 190                                                 newline.erase(x, var.length());
 191                                                 newline.insert(x, GetVar(var, original_line));
 192                                                 x = newline.find(var);
 193                                         }
 194                                 }
 195
 196                                 /* Special variables */
 197                                 SearchAndReplace(newline, "$nick", user->nick);
 198                                 SearchAndReplace(newline, "$ident", user->ident);
 199                                 SearchAndReplace(newline, "$host", user->host);
 200                                 SearchAndReplace(newline, "$vhost", user->dhost);
 201
 202                                 irc::tokenstream ss(newline);
 203                                 const char* parv[127];
 204                                 int x = 0;
 205
 206                                 while ((pars[x] = ss.GetToken()) != "")
 207                                 {
 208                                         parv[x] = pars[x].c_str();
 209                                         ServerInstance->Log(DEBUG,"Parameter %d: %s", x, parv[x]);
 210                                         x++;
 211                                 }
 212
 213                                 ServerInstance->CallCommandHandler(parv[0], &parv[1], x-1, user);
 214                                 return 1;
 215                         }
 216                 }
 217                 return 0;
 218         }
 219
 220         virtual void OnRehash(const std::string &parameter)
 221         {
 222                 ReadAliases();
 223         }
 224 };
 225
 226
 227 class ModuleAliasFactory : public ModuleFactory
 228 {
 229  public:
 230         ModuleAliasFactory()
 231         {
 232         }
 233
 234         ~ModuleAliasFactory()
 235         {
 236         }
 237
 238                 virtual Module * CreateModule(InspIRCd* Me)
 239         {
 240                 return new ModuleAlias(Me);
 241         }
 242 };
 243
 244
 245 extern "C" void * init_module( void )
 246 {
 247         return new ModuleAliasFactory;
 248 }
 249