src/modules/m_alias.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 "users.h"
  15 #include "channels.h"
  16 #include "modules.h"
  17 #include "inspircd.h"
  18 #include <vector>
  19
  20 /* $ModDesc: Provides aliases of commands. */
  21
  22 /** An alias definition
  23  */
  24 class Alias : public classbase
  25 {
  26  public:
  27         /** The text of the alias command */
  28         irc::string text;
  29         /** Text to replace with */
  30         std::string replace_with;
  31         /** Nickname required to perform alias */
  32         std::string requires;
  33         /** Alias requires ulined server */
  34         bool uline;
  35         /** Requires oper? */
  36         bool operonly;
  37 };
  38
  39 class ModuleAlias : public Module
  40 {
  41  private:
  42         std::vector<Alias> Aliases;
  43         std::vector<std::string> pars;
  44
  45         virtual void ReadAliases()
  46         {
  47                 ConfigReader MyConf(ServerInstance);
  48
  49                 Aliases.clear();
  50                 for (int i = 0; i < MyConf.Enumerate("alias"); i++)
  51                 {
  52                         Alias a;
  53                         std::string txt;
  54                         txt = MyConf.ReadValue("alias", "text", i);
  55                         a.text = txt.c_str();
  56                         a.replace_with = MyConf.ReadValue("alias", "replace", i, true);
  57                         a.requires = MyConf.ReadValue("alias", "requires", i);
  58                         a.uline = MyConf.ReadFlag("alias", "uline", i);
  59                         a.operonly = MyConf.ReadFlag("alias", "operonly", i);
  60                         Aliases.push_back(a);
  61                 }
  62         }
  63
  64  public:
  65
  66         ModuleAlias(InspIRCd* Me)
  67                 : Module::Module(Me)
  68         {
  69                 ReadAliases();
  70                 pars.resize(127);
  71         }
  72
  73         void Implements(char* List)
  74         {
  75                 List[I_OnPreCommand] = List[I_OnRehash] = 1;
  76         }
  77
  78         virtual ~ModuleAlias()
  79         {
  80         }
  81
  82         virtual Version GetVersion()
  83         {
  84                 return Version(1,1,0,1,VF_VENDOR,API_VERSION);
  85         }
  86
  87         std::string GetVar(std::string varname, const std::string &original_line)
  88         {
  89                 irc::spacesepstream ss(original_line);
  90                 varname.erase(varname.begin());
  91                 int index = *(varname.begin()) - 48;
  92                 varname.erase(varname.begin());
  93                 bool everything_after = (varname == "-");
  94                 std::string word = "";
  95
  96                 ServerInstance->Log(DEBUG,"Get var %d%s", index , everything_after ? " and all after it" : "");
  97
  98                 for (int j = 0; j < index; j++)
  99                         word = ss.GetToken();
 100
 101                 if (everything_after)
 102                 {
 103                         std::string more = "*";
 104                         while ((more = ss.GetToken()) != "")
 105                         {
 106                                 word.append(" ");
 107                                 word.append(more);
 108                         }
 109                 }
 110
 111                 ServerInstance->Log(DEBUG,"Var is '%s'", word.c_str());
 112
 113                 return word;
 114         }
 115
 116         void SearchAndReplace(std::string& newline, const std::string &find, const std::string &replace)
 117         {
 118                 std::string::size_type x = newline.find(find);
 119                 while (x != std::string::npos)
 120                 {
 121                         newline.erase(x, find.length());
 122                         newline.insert(x, replace);
 123                         x = newline.find(find);
 124                 }
 125         }
 126
 127         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
 128         {
 129                 userrec *u = NULL;
 130                 irc::string c = command.c_str();
 131                 /* If the command is valid, we dont want to know,
 132                  * and if theyre not registered yet, we dont want
 133                  * to know either
 134                  */
 135                 if ((validated) || (user->registered != REG_ALL))
 136                         return 0;
 137
 138                 for (unsigned int i = 0; i < Aliases.size(); i++)
 139                 {
 140                         if (Aliases[i].text == c)
 141                         {
 142                                 if ((Aliases[i].operonly) && (!*user->oper))
 143                                         return 0;
 144
 145                                 if (Aliases[i].requires != "")
 146                                 {
 147                                         u = ServerInstance->FindNick(Aliases[i].requires);
 148                                         if (!u)
 149                                         {
 150                                                 user->WriteServ("401 "+std::string(user->nick)+" "+Aliases[i].requires+" :is currently unavailable. Please try again later.");
 151                                                 return 1;
 152                                         }
 153                                 }
 154                                 if ((u != NULL) && (Aliases[i].requires != "") && (Aliases[i].uline))
 155                                 {
 156                                         if (!ServerInstance->ULine(u->server))
 157                                         {
 158                                                 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!");
 159                                                 user->WriteServ("401 "+std::string(user->nick)+" "+Aliases[i].requires+" :is an imposter! Please inform an IRC operator as soon as possible.");
 160                                                 return 1;
 161                                         }
 162                                 }
 163
 164                                 /* Now, search and replace in a copy of the original_line, replacing $1 through $9 and $1- etc */
 165
 166                                 std::string::size_type crlf = Aliases[i].replace_with.find('\n');
 167
 168                                 if (crlf == std::string::npos)
 169                                 {
 170                                         ServerInstance->Log(DEBUG,"Single line alias: '%s'", Aliases[i].replace_with.c_str());
 171                                         DoCommand(Aliases[i].replace_with, user, original_line);
 172                                         return 1;
 173                                 }
 174                                 else
 175                                 {
 176                                         ServerInstance->Log(DEBUG,"Multi line alias: '%s'", Aliases[i].replace_with.c_str());
 177                                         irc::sepstream commands(Aliases[i].replace_with, '\n');
 178                                         std::string command = "*";
 179                                         while ((command = commands.GetToken()) != "")
 180                                         {
 181                                                 ServerInstance->Log(DEBUG,"Execute: '%s'", command.c_str());
 182                                                 DoCommand(command, user, original_line);
 183                                         }
 184                                         return 1;
 185                                 }
 186                         }
 187                 }
 188                 return 0;
 189         }
 190
 191         void DoCommand(std::string newline, userrec* user, const std::string &original_line)
 192         {
 193                 for (int v = 1; v < 10; v++)
 194                 {
 195                         std::string var = "$";
 196                         var.append(ConvToStr(v));
 197                         var.append("-");
 198                         std::string::size_type x = newline.find(var);
 199
 200                         while (x != std::string::npos)
 201                         {
 202                                 newline.erase(x, var.length());
 203                                 newline.insert(x, GetVar(var, original_line));
 204                                 x = newline.find(var);
 205                         }
 206
 207                         var = "$";
 208                         var.append(ConvToStr(v));
 209                         x = newline.find(var);
 210
 211                         while (x != std::string::npos)
 212                         {
 213                                 newline.erase(x, var.length());
 214                                 newline.insert(x, GetVar(var, original_line));
 215                                 x = newline.find(var);
 216                         }
 217                 }
 218
 219                 /* Special variables */
 220                 SearchAndReplace(newline, "$nick", user->nick);
 221                 SearchAndReplace(newline, "$ident", user->ident);
 222                 SearchAndReplace(newline, "$host", user->host);
 223                 SearchAndReplace(newline, "$vhost", user->dhost);
 224
 225                 irc::tokenstream ss(newline);
 226                 const char* parv[127];
 227                 int x = 0;
 228
 229                 while ((pars[x] = ss.GetToken()) != "")
 230                 {
 231                         parv[x] = pars[x].c_str();
 232                         ServerInstance->Log(DEBUG,"Parameter %d: %s", x, parv[x]);
 233                         x++;
 234                 }
 235
 236                 ServerInstance->Log(DEBUG,"Call command handler on %s", parv[0]);
 237
 238                 if (ServerInstance->Parser->CallHandler(parv[0], &parv[1], x-1, user) == CMD_INVALID)
 239                 {
 240                         ServerInstance->Log(DEBUG,"Unknown command or not enough parameters");
 241                 }
 242                 else
 243                 {
 244                         ServerInstance->Log(DEBUG,"Command handler called successfully.");
 245                 }
 246         }
 247
 248         virtual void OnRehash(const std::string &parameter)
 249         {
 250                 ReadAliases();
 251         }
 252 };
 253
 254
 255 class ModuleAliasFactory : public ModuleFactory
 256 {
 257  public:
 258         ModuleAliasFactory()
 259         {
 260         }
 261
 262         ~ModuleAliasFactory()
 263         {
 264         }
 265
 266                 virtual Module * CreateModule(InspIRCd* Me)
 267         {
 268                 return new ModuleAlias(Me);
 269         }
 270 };
 271
 272
 273 extern "C" void * init_module( void )
 274 {
 275         return new ModuleAliasFactory;
 276 }
 277