/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
 *   Copyright (C) 2017, 2019-2021, 2023-2024 Sadie Powell <sadie@witchery.services>
 *   Copyright (C) 2016 0x277F <0x277F@gmail.com>
 *   Copyright (C) 2013 Attila Molnar <attilamolnar@hush.com>
 *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
 *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2006 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/exemption.h"
#include "modules/extban.h"

class ModuleStripColor final
	: public Module
{
private:
	CheckExemption::EventProvider exemptionprov;
	ExtBan::Acting extban;
	SimpleChannelMode csc;
	SimpleUserMode usc;

public:
	ModuleStripColor()
		: Module(VF_VENDOR, "Adds channel mode S (stripcolor) which allows channels to strip IRC formatting codes from messages.")
		, exemptionprov(weak_from_this())
		, extban(weak_from_this(), "stripcolor", 'S')
		, csc(weak_from_this(), "stripcolor", 'S')
		, usc(weak_from_this(), "stripcolor", 'S', false, "u_stripcolor")
	{
	}

	ModResult OnUserPreMessage(User* user, MessageTarget& target, MessageDetails& details) override
	{
		if (!user->IsLocal())
			return MOD_RES_PASSTHRU;

		bool active = false;
		switch (target.type)
		{
			case MessageTarget::TYPE_USER:
			{
				const auto* t = target.Get<User>();
				active = t->IsModeSet(usc);
				break;
			}
			case MessageTarget::TYPE_CHANNEL:
			{
				auto* t = target.Get<Channel>();
				ModResult res = exemptionprov.Check(user, t, "stripcolor");

				if (res == MOD_RES_ALLOW)
					return MOD_RES_PASSTHRU;

				active = !extban.GetStatus(user, t).check(!t->IsModeSet(csc));
				break;
			}
			case MessageTarget::TYPE_SERVER:
				break;
		}

		if (active)
		{
			InspIRCd::StripColor(details.text);
		}

		return MOD_RES_PASSTHRU;
	}

	void OnUserPart(Membership* memb, std::string& partmessage, User::List& except_list) override
	{
		User* user = memb->user;
		Channel* channel = memb->chan;

		if (!user->IsLocal())
			return;

		if (extban.GetStatus(user, channel).check(!user->IsModeSet(csc)))
		{
			ModResult res = exemptionprov.Check(user, channel, "stripcolor");

			if (res != MOD_RES_ALLOW)
				InspIRCd::StripColor(partmessage);
		}
	}
};

MODULE_INIT(ModuleStripColor)