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 init() CXX11_OVERRIDE
  26         {
  27                 ServerInstance->Modules->Attach(I_OnPreCommand, this);
  28         }
  29
  30         void Prioritize()
  31         {
  32                 ServerInstance->Modules->SetPriority(this, I_OnPreCommand, PRIORITY_FIRST);
  33         }
  34
  35         Version GetVersion() CXX11_OVERRIDE
  36         {
  37                 return Version("Provides the ability to abbreviate commands a-la BBC BASIC keywords.",VF_VENDOR);
  38         }
  39
  40         ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line) CXX11_OVERRIDE
  41         {
  42                 /* Command is already validated, has a length of 0, or last character is not a . */
  43                 if (validated || command.empty() || *command.rbegin() != '.')
  44                         return MOD_RES_PASSTHRU;
  45
  46                 /* Whack the . off the end */
  47                 command.erase(command.end() - 1);
  48
  49                 /* Look for any command that starts with the same characters, if it does, replace the command string with it */
  50                 size_t clen = command.length();
  51                 std::string foundcommand, matchlist;
  52                 bool foundmatch = false;
  53                 for (Commandtable::iterator n = ServerInstance->Parser->cmdlist.begin(); n != ServerInstance->Parser->cmdlist.end(); ++n)
  54                 {
  55                         if (n->first.length() < clen)
  56                                 continue;
  57
  58                         if (command == n->first.substr(0, clen))
  59                         {
  60                                 if (matchlist.length() > 450)
  61                                 {
  62                                         user->WriteNumeric(420, "%s :Ambiguous abbreviation and too many possible matches.", user->nick.c_str());
  63                                         return MOD_RES_DENY;
  64                                 }
  65
  66                                 if (!foundmatch)
  67                                 {
  68                                         /* Found the command */
  69                                         foundcommand = n->first;
  70                                         foundmatch = true;
  71                                 }
  72                                 else
  73                                         matchlist.append(" ").append(n->first);
  74                         }
  75                 }
  76
  77                 /* Ambiguous command, list the matches */
  78                 if (!matchlist.empty())
  79                 {
  80                         user->WriteNumeric(420, "%s :Ambiguous abbreviation, posssible matches: %s%s", user->nick.c_str(), foundcommand.c_str(), matchlist.c_str());
  81                         return MOD_RES_DENY;
  82                 }
  83
  84                 if (foundcommand.empty())
  85                 {
  86                         /* No match, we have to put the . back again so that the invalid command numeric looks correct. */
  87                         command += '.';
  88                 }
  89                 else
  90                 {
  91                         command = foundcommand;
  92                 }
  93
  94                 return MOD_RES_PASSTHRU;
  95         }
  96 };
  97
  98 MODULE_INIT(ModuleAbbreviation)