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                 /* Whack the . off the end */
  42                 command.erase(command.end() - 1);
  43
  44                 /* Look for any command that starts with the same characters, if it does, replace the command string with it */
  45                 size_t clen = command.length();
  46                 std::string foundcommand, matchlist;
  47                 bool foundmatch = false;
  48                 for (Commandtable::iterator n = ServerInstance->Parser->cmdlist.begin(); n != ServerInstance->Parser->cmdlist.end(); ++n)
  49                 {
  50                         if (n->first.length() < clen)
  51                                 continue;
  52
  53                         if (command == n->first.substr(0, clen))
  54                         {
  55                                 if (matchlist.length() > 450)
  56                                 {
  57                                         user->WriteNumeric(420, ":Ambiguous abbreviation and too many possible matches.");
  58                                         return MOD_RES_DENY;
  59                                 }
  60
  61                                 if (!foundmatch)
  62                                 {
  63                                         /* Found the command */
  64                                         foundcommand = n->first;
  65                                         foundmatch = true;
  66                                 }
  67                                 else
  68                                         matchlist.append(" ").append(n->first);
  69                         }
  70                 }
  71
  72                 /* Ambiguous command, list the matches */
  73                 if (!matchlist.empty())
  74                 {
  75                         user->WriteNumeric(420, ":Ambiguous abbreviation, posssible matches: %s%s", foundcommand.c_str(), matchlist.c_str());
  76                         return MOD_RES_DENY;
  77                 }
  78
  79                 if (foundcommand.empty())
  80                 {
  81                         /* No match, we have to put the . back again so that the invalid command numeric looks correct. */
  82                         command += '.';
  83                 }
  84                 else
  85                 {
  86                         command = foundcommand;
  87                 }
  88
  89                 return MOD_RES_PASSTHRU;
  90         }
  91 };
  92
  93 MODULE_INIT(ModuleAbbreviation)