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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2018-2023, 2026 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2014 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Craig Edwards <brain@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "modules/ircv3.h"
class ModuleAbbreviation final
: public Module
{
private:
IRCv3::ReplyCapReference stdrplcap;
public:
ModuleAbbreviation()
: Module(VF_VENDOR, "Allows commands to be abbreviated by appending a full stop.")
, stdrplcap(weak_from_this())
{
}
void Prioritize() override
{
ServerInstance->Modules.SetPriority(shared_from_this(), I_OnPreCommand, PRIORITY_FIRST);
}
ModResult OnPreCommand(std::string& command, CommandBase::Params& parameters, LocalUser* user, bool validated) override
{
/* Command is already validated, has a length of 0, or last character is not a . */
if (validated || command.empty() || command.back() != '.')
return MOD_RES_PASSTHRU;
// :irc.example.com FAIL * AMBIGUOUS_ABBREVIATION :BLAH
// :irc.example.com NOTICE nick :*** BLAH
const auto maxlen = ServerInstance->Config->Limits.MaxLine
- ServerInstance->Config->GetServerName().size()
- std::max<size_t>(user->nick.length() + 4, 22)
- 10; // Some extra just in case.
auto foundmatch = false;
std::string foundcommand;
std::string extracommands;
const auto cmdlen = command.length() - 1;
for (const auto& [cmdname, cmd] : ServerInstance->Parser.GetCommands())
{
// Look for any command that starts with the same characters that
// is usable by the caller.
if (command.compare(0, cmdlen, cmdname, 0, cmdlen) != 0 || !cmd->IsUsableBy(user))
continue; // No match.
if (extracommands.length() > maxlen)
{
IRCv3::WriteReply(Reply::FAIL, user, stdrplcap, nullptr, "AMBIGUOUS_ABBREVIATION",
"Ambiguous abbreviation and too many possible matches.");
return MOD_RES_DENY;
}
if (!foundmatch)
{
// Found the command.
foundcommand = cmdname;
foundmatch = true;
}
else
extracommands.append(" ").append(cmdname);
}
/* Ambiguous command, list the matches */
if (!extracommands.empty())
{
IRCv3::WriteReply(Reply::FAIL, user, stdrplcap, nullptr, "AMBIGUOUS_ABBREVIATION",
FMT::format("Ambiguous abbreviation, possible matches: {}{}", foundcommand, extracommands));
return MOD_RES_DENY;
}
// Replace the command abbreviation with the found command name.
if (!foundcommand.empty())
command = foundcommand;
return MOD_RES_PASSTHRU;
}
};
MODULE_INIT(ModuleAbbreviation)
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