/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2019-2023 Sadie Powell <sadie@witchery.services>
 *   Copyright (C) 2014 Attila Molnar <attilamolnar@hush.com>
 *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
 *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2006, 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"

class CommandTline final
	: public Command
{
public:
	CommandTline(Module* Creator)
		: Command(Creator, "TLINE", 1)
	{
		access_needed = CmdAccess::OPERATOR;
		syntax = { "<mask>" };
	}

	CmdResult Handle(User* user, const Params& parameters) override
	{
		unsigned int n_matched = 0;
		unsigned int n_match_host = 0;
		unsigned int n_match_ip = 0;

		for (const auto& [_, u] : ServerInstance->Users.GetUsers())
		{
			if (InspIRCd::Match(u->GetRealMask(), parameters[0]))
			{
				n_matched++;
				n_match_host++;
			}
			else
			{
				if (InspIRCd::MatchCIDR(u->GetUserAddress(), parameters[0]))
				{
					n_matched++;
					n_match_ip++;
				}
			}
		}

		unsigned long n_counted = ServerInstance->Users.GetUsers().size();
		if (n_matched)
		{
			float p = (n_matched / (float)n_counted) * 100;
			user->WriteNotice(INSP_FORMAT("*** TLINE: Counted {} user(s). Matched '{}' against {} user(s) ({:0.2}% of the userbase). {} by hostname and {} by IP address.",
				n_counted, parameters[0], n_matched, p, n_match_host, n_match_ip));
		}
		else
			user->WriteNotice(INSP_FORMAT("*** TLINE: Counted {} user(s). Matched '{}' against no user(s).", n_counted, parameters[0]));

		return CmdResult::SUCCESS;
	}
};

class ModuleTLine final
	: public Module
{
private:
	CommandTline cmd;

public:
	ModuleTLine()
		: Module(VF_VENDOR, "Adds the /TLINE command which allows server operators to determine how many users would be affected by an X-line on a specified pattern.")
		, cmd(this)
	{
	}
};

MODULE_INIT(ModuleTLine)