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 class ModuleAbbreviation : public Module
  23 {
  24  public:
  25         void Prioritize()
  26         {
  27                 ServerInstance->Modules->SetPriority(this, I_OnPreCommand, PRIORITY_FIRST);
  28         }
  29
  30         Version GetVersion() CXX11_OVERRIDE
  31         {
  32                 return Version("Provides the ability to abbreviate commands a-la BBC BASIC keywords.",VF_VENDOR);
  33         }
  34
  35         ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line) CXX11_OVERRIDE
  36         {
  37                 /* Command is already validated, has a length of 0, or last character is not a . */
  38                 if (validated || command.empty() || *command.rbegin() != '.')
  39                         return MOD_RES_PASSTHRU;
  40
  41                 /* Look for any command that starts with the same characters, if it does, replace the command string with it */
  42                 size_t clen = command.length() - 1;
  43                 std::string foundcommand, matchlist;
  44                 bool foundmatch = false;
  45                 const CommandParser::CommandMap& commands = ServerInstance->Parser.GetCommands();
  46                 for (CommandParser::CommandMap::const_iterator n = commands.begin(); n != commands.end(); ++n)
  47                 {
  48                         if (!command.compare(0, clen, n->first, 0, clen))
  49                         {
  50                                 if (matchlist.length() > 450)
  51                                 {
  52                                         user->WriteNumeric(420, ":Ambiguous abbreviation and too many possible matches.");
  53                                         return MOD_RES_DENY;
  54                                 }
  55
  56                                 if (!foundmatch)
  57                                 {
  58                                         /* Found the command */
  59                                         foundcommand = n->first;
  60                                         foundmatch = true;
  61                                 }
  62                                 else
  63                                         matchlist.append(" ").append(n->first);
  64                         }
  65                 }
  66
  67                 /* Ambiguous command, list the matches */
  68                 if (!matchlist.empty())
  69                 {
  70                         user->WriteNumeric(420, ":Ambiguous abbreviation, possible matches: %s%s", foundcommand.c_str(), matchlist.c_str());
  71                         return MOD_RES_DENY;
  72                 }
  73
  74                 if (!foundcommand.empty())
  75                 {
  76                         command = foundcommand;
  77                 }
  78
  79                 return MOD_RES_PASSTHRU;
  80         }
  81 };
  82
  83 MODULE_INIT(ModuleAbbreviation)