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         /** Requires oper? */
  41         bool operonly;
  42 };
  43
  44 class ModuleAlias : public Module
  45 {
  46  private:
  47         std::vector<Alias> Aliases;
  48         std::vector<std::string> pars;
  49
  50         virtual void ReadAliases()
  51         {
  52                 ConfigReader MyConf(ServerInstance);
  53
  54                 Aliases.clear();
  55
  56                 for (int i = 0; i < MyConf.Enumerate("alias"); i++)
  57                 {
  58                         Alias a;
  59                         std::string txt;
  60                         txt = MyConf.ReadValue("alias", "text", i);
  61                         a.text = txt.c_str();
  62                         a.replace_with = MyConf.ReadValue("alias", "replace", i);
  63                         a.requires = MyConf.ReadValue("alias", "requires", i);
  64                         a.uline = MyConf.ReadFlag("alias", "uline", i);
  65                         a.operonly = MyConf.ReadFlag("alias", "operonly", i);
  66                         Aliases.push_back(a);
  67                 }
  68
  69         }
  70
  71  public:
  72
  73         ModuleAlias(InspIRCd* Me)
  74                 : Module::Module(Me)
  75         {
  76                 ReadAliases();
  77                 pars.resize(127);
  78         }
  79
  80         void Implements(char* List)
  81         {
  82                 List[I_OnPreCommand] = List[I_OnRehash] = 1;
  83         }
  84
  85         virtual ~ModuleAlias()
  86         {
  87         }
  88
  89         virtual Version GetVersion()
  90         {
  91                 return Version(1,0,0,1,VF_VENDOR);
  92         }
  93
  94         std::string GetVar(std::string varname, const std::string &original_line)
  95         {
  96                 irc::spacesepstream ss(original_line);
  97                 varname.erase(varname.begin());
  98                 int index = *(varname.begin()) - 48;
  99                 varname.erase(varname.begin());
 100                 bool everything_after = (varname == "-");
 101                 std::string word = "";
 102
 103                 ServerInstance->Log(DEBUG,"Get var %d%s", index , everything_after ? " and all after it" : "");
 104
 105                 for (int j = 0; j < index; j++)
 106                         word = ss.GetToken();
 107
 108                 if (everything_after)
 109                 {
 110                         std::string more = "*";
 111                         while ((more = ss.GetToken()) != "")
 112                         {
 113                                 word.append(" ");
 114                                 word.append(more);
 115                         }
 116                 }
 117
 118                 ServerInstance->Log(DEBUG,"Var is '%s'", word.c_str());
 119
 120                 return word;
 121         }
 122
 123         void SearchAndReplace(std::string& newline, const std::string &find, const std::string &replace)
 124         {
 125                 std::string::size_type x = newline.find(find);
 126                 while (x != std::string::npos)
 127                 {
 128                         newline.erase(x, find.length());
 129                         newline.insert(x, replace);
 130                         x = newline.find(find);
 131                 }
 132         }
 133
 134         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
 135         {
 136                 userrec *u = NULL;
 137                 irc::string c = command.c_str();
 138                 /* If the command is valid, we dont want to know,
 139                  * and if theyre not registered yet, we dont want
 140                  * to know either
 141                  */
 142                 if ((validated) || (user->registered != REG_ALL))
 143                         return 0;
 144
 145                 for (unsigned int i = 0; i < Aliases.size(); i++)
 146                 {
 147                         if (Aliases[i].text == c)
 148                         {
 149                                 if ((Aliases[i].operonly) && (!*user->oper))
 150                                         return 0;
 151
 152                                 if (Aliases[i].requires != "")
 153                                 {
 154                                         u = ServerInstance->FindNick(Aliases[i].requires);
 155                                         if (!u)
 156                                         {
 157                                                 user->WriteServ("401 "+std::string(user->nick)+" "+Aliases[i].requires+" :is currently unavailable. Please try again later.");
 158                                                 return 1;
 159                                         }
 160                                 }
 161                                 if ((u != NULL) && (Aliases[i].requires != "") && (Aliases[i].uline))
 162                                 {
 163                                         if (!ServerInstance->ULine(u->server))
 164                                         {
 165                                                 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!");
 166                                                 user->WriteServ("401 "+std::string(user->nick)+" "+Aliases[i].requires+" :is an imposter! Please inform an IRC operator as soon as possible.");
 167                                                 return 1;
 168                                         }
 169                                 }
 170
 171                                 /* Now, search and replace in a copy of the original_line, replacing $1 through $9 and $1- etc */
 172
 173                                 std::string::size_type crlf = Aliases[i].replace_with.find('\n');
 174
 175                                 if (crlf == std::string::npos)
 176                                 {
 177                                         DoCommand(Aliases[i].replace_with, user, original_line);
 178                                         return 1;
 179                                 }
 180                                 else
 181                                 {
 182                                         irc::sepstream commands(Aliases[i].replace_with, '\n');
 183                                         std::string command = "*";
 184                                         while ((command = commands.GetToken()) != "")
 185                                         {
 186                                                 DoCommand(command, user, original_line);
 187                                         }
 188                                         return 1;
 189                                 }
 190                         }
 191                 }
 192                 return 0;
 193         }
 194
 195         void DoCommand(std::string newline, userrec* user, const std::string &original_line)
 196         {
 197                 for (int v = 1; v < 10; v++)
 198                 {
 199                         std::string var = "$";
 200                         var.append(ConvToStr(v));
 201                         var.append("-");
 202                         std::string::size_type x = newline.find(var);
 203
 204                         while (x != std::string::npos)
 205                         {
 206                                 newline.erase(x, var.length());
 207                                 newline.insert(x, GetVar(var, original_line));
 208                                 x = newline.find(var);
 209                         }
 210
 211                         var = "$";
 212                         var.append(ConvToStr(v));
 213                         x = newline.find(var);
 214
 215                         while (x != std::string::npos)
 216                         {
 217                                 newline.erase(x, var.length());
 218                                 newline.insert(x, GetVar(var, original_line));
 219                                 x = newline.find(var);
 220                         }
 221                 }
 222
 223                 /* Special variables */
 224                 SearchAndReplace(newline, "$nick", user->nick);
 225                 SearchAndReplace(newline, "$ident", user->ident);
 226                 SearchAndReplace(newline, "$host", user->host);
 227                 SearchAndReplace(newline, "$vhost", user->dhost);
 228
 229                 irc::tokenstream ss(newline);
 230                 const char* parv[127];
 231                 int x = 0;
 232
 233                 while ((pars[x] = ss.GetToken()) != "")
 234                 {
 235                         parv[x] = pars[x].c_str();
 236                         ServerInstance->Log(DEBUG,"Parameter %d: %s", x, parv[x]);
 237                         x++;
 238                 }
 239
 240                 if (ServerInstance->CallCommandHandler(parv[0], &parv[1], x-1, user) == CMD_INVALID)
 241                 {
 242                         user->WriteServ("421 %s %s :Unknown command", user->nick, parv[0]);
 243                 }
 244         }
 245
 246         virtual void OnRehash(const std::string &parameter)
 247         {
 248                 ReadAliases();
 249         }
 250 };
 251
 252
 253 class ModuleAliasFactory : public ModuleFactory
 254 {
 255  public:
 256         ModuleAliasFactory()
 257         {
 258         }
 259
 260         ~ModuleAliasFactory()
 261         {
 262         }
 263
 264                 virtual Module * CreateModule(InspIRCd* Me)
 265         {
 266                 return new ModuleAlias(Me);
 267         }
 268 };
 269
 270
 271 extern "C" void * init_module( void )
 272 {
 273         return new ModuleAliasFactory;
 274 }
 275