/* ChanServ core functions
 *
 * (C) 2003-2025 Anope Team
 * Contact us at team@anope.org
 *
 * Please read COPYING and README for further details.
 *
 * Based on the original code of Epona by Lara.
 * Based on the original code of Services by Andy Church.
 */

#include "module.h"

class CommandCSUnban final
	: public Command
{
public:
	CommandCSUnban(Module *creator) : Command(creator, "chanserv/unban", 0, 2)
	{
		this->SetDesc(_("Remove all bans preventing a user from entering a channel"));
		this->SetSyntax(_("\037channel\037 [\037nick\037]"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) override
	{
		const auto &mode = Config->GetCommand(source).Get<Anope::string>("mode", "BAN");
		auto *cm = ModeManager::FindChannelModeByName(mode);
		if (!cm)
			return;

		std::vector<ChannelMode *> modes = cm->listeners;
		modes.push_back(cm);

		if (params.empty())
		{
			if (!source.GetUser())
				return;

			std::deque<ChannelInfo *> queue;
			source.GetAccount()->GetChannelReferences(queue);

			unsigned count = 0;
			for (auto *ci : queue)
			{
				if (!ci->c || !(source.AccessFor(ci).HasPriv("UNBAN") || source.AccessFor(ci).HasPriv("UNBANME")))
					continue;

				for (const auto *mode : modes)
				{
					if (IRCD->CanClearModes.count(mode->name))
					{
						IRCD->SendClearModes(ci->WhoSends(), ci->c, source.GetUser(), mode->name);
						count++;
						continue;
					}

					if (ci->c->Unban(source.GetUser(), mode->name, true))
						++count;
				}
			}

			Log(LOG_COMMAND, source, this, NULL) << "on all channels";
			source.Reply(_("You have been unbanned from %d channels."), count);

			return;
		}

		ChannelInfo *ci = ChannelInfo::Find(params[0]);
		if (ci == NULL)
		{
			source.Reply(CHAN_X_NOT_REGISTERED, params[0].c_str());
			return;
		}

		if (ci->c == NULL)
		{
			source.Reply(CHAN_X_NOT_IN_USE, ci->name.c_str());
			return;
		}

		User *u2 = source.GetUser();
		if (params.size() > 1)
			u2 = User::Find(params[1], true);

		if (!u2)
		{
			source.Reply(NICK_X_NOT_IN_USE, params[1].c_str());
			return;
		}

		if (!source.AccessFor(ci).HasPriv("UNBAN") &&
			(u2 != source.GetUser() || !source.AccessFor(ci).HasPriv("UNBANME")) &&
			!source.HasPriv("chanserv/kick"))
		{
			source.Reply(ACCESS_DENIED);
			return;
		}

		bool override = !source.AccessFor(ci).HasPriv("UNBAN") && source.HasPriv("chanserv/kick");
		Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "to unban " << u2->nick;

		for (const auto *mode : modes)
		{
			if (IRCD->CanClearModes.count(mode->name))
			{
				IRCD->SendClearModes(ci->WhoSends(), ci->c, u2, mode->name);
				continue;
			}

			ci->c->Unban(u2, mode->name, source.GetUser() == u2);
		}

		if (u2 == source.GetUser())
			source.Reply(_("You have been unbanned from \002%s\002."), ci->c->name.c_str());
		else
			source.Reply(_("\002%s\002 has been unbanned from \002%s\002."), u2->nick.c_str(), ci->c->name.c_str());
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_(
				"Tells %s to remove all bans preventing you or the given "
				"user from entering the given channel. If no channel is "
				"given, all bans affecting you in channels you have access "
				"in are removed."
				"\n\n"
				"By default, limited to AOPs or those with level 5 access and above "
				"on the channel."
			),
			source.service->nick.c_str());
		return true;
	}
};

class CSUnban final
	: public Module
{
	CommandCSUnban commandcsunban;

public:
	CSUnban(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR),
		commandcsunban(this)
	{

	}
};

MODULE_INIT(CSUnban)