src/modules/m_abbreviation.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
   5  *
   6  * This file is part of InspIRCd.  InspIRCd is free software: you can
   7  * redistribute it and/or modify it under the terms of the GNU General Public
   8  * License as published by the Free Software Foundation, version 2.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include "inspircd.h"
  21
  22 /* $ModDesc: Provides the ability to abbreviate commands a-la BBC BASIC keywords. */
  23
  24 class ModuleAbbreviation : public Module
  25 {
  26  public:
  27         void init()
  28         {
  29                 ServerInstance->Modules->Attach(I_OnPreCommand, this);
  30         }
  31
  32         void Prioritize()
  33         {
  34                 ServerInstance->Modules->SetPriority(this, I_OnPreCommand, PRIORITY_FIRST);
  35         }
  36
  37         virtual Version GetVersion()
  38         {
  39                 return Version("Provides the ability to abbreviate commands a-la BBC BASIC keywords.",VF_VENDOR);
  40         }
  41
  42         virtual ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line)
  43         {
  44                 /* Command is already validated, has a length of 0, or last character is not a . */
  45                 if (validated || command.empty() || *command.rbegin() != '.')
  46                         return MOD_RES_PASSTHRU;
  47
  48                 /* Whack the . off the end */
  49                 command.erase(command.end() - 1);
  50
  51                 /* Look for any command that starts with the same characters, if it does, replace the command string with it */
  52                 size_t clen = command.length();
  53                 std::string foundcommand, matchlist;
  54                 bool foundmatch = false;
  55                 for (Commandtable::iterator n = ServerInstance->Parser->cmdlist.begin(); n != ServerInstance->Parser->cmdlist.end(); ++n)
  56                 {
  57                         if (n->first.length() < clen)
  58                                 continue;
  59
  60                         if (command == n->first.substr(0, clen))
  61                         {
  62                                 if (matchlist.length() > 450)
  63                                 {
  64                                         user->WriteNumeric(420, "%s :Ambiguous abbreviation and too many possible matches.", user->nick.c_str());
  65                                         return MOD_RES_DENY;
  66                                 }
  67
  68                                 if (!foundmatch)
  69                                 {
  70                                         /* Found the command */
  71                                         foundcommand = n->first;
  72                                         foundmatch = true;
  73                                 }
  74                                 else
  75                                         matchlist.append(" ").append(n->first);
  76                         }
  77                 }
  78
  79                 /* Ambiguous command, list the matches */
  80                 if (!matchlist.empty())
  81                 {
  82                         user->WriteNumeric(420, "%s :Ambiguous abbreviation, posssible matches: %s%s", user->nick.c_str(), foundcommand.c_str(), matchlist.c_str());
  83                         return MOD_RES_DENY;
  84                 }
  85
  86                 if (foundcommand.empty())
  87                 {
  88                         /* No match, we have to put the . back again so that the invalid command numeric looks correct. */
  89                         command += '.';
  90                 }
  91                 else
  92                 {
  93                         command = foundcommand;
  94                 }
  95
  96                 return MOD_RES_PASSTHRU;
  97         }
  98 };
  99
 100 MODULE_INIT(ModuleAbbreviation)