/* ChanServ core functions
 *
 * (C) 2003-2022 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"
#include "modules/cs_mode.h"

struct ModeLockImpl : ModeLock, Serializable
{
	ModeLockImpl() : Serializable("ModeLock")
	{
	}

	~ModeLockImpl()
	{
		ChannelInfo *chan = ChannelInfo::Find(ci);
		if (chan)
		{
			ModeLocks *ml = chan->GetExt<ModeLocks>("modelocks");
			if (ml)
				ml->RemoveMLock(this);
		}
	}

	void Serialize(Serialize::Data &data) const anope_override;
	static Serializable* Unserialize(Serializable *obj, Serialize::Data &data);
};

struct ModeLocksImpl : ModeLocks
{
	Serialize::Reference<ChannelInfo> ci;
	Serialize::Checker<ModeList> mlocks;

	ModeLocksImpl(Extensible *obj) : ci(anope_dynamic_static_cast<ChannelInfo *>(obj)), mlocks("ModeLock")
	{
	}

	~ModeLocksImpl()
	{
		ModeList modelist;
		mlocks->swap(modelist);
		for (ModeList::iterator it = modelist.begin(); it != modelist.end(); ++it)
		{
			ModeLock *ml = *it;
			delete ml;
		}
	}

	bool HasMLock(ChannelMode *mode, const Anope::string &param, bool status) const anope_override
	{
		if (!mode)
			return false;

		for (ModeList::const_iterator it = this->mlocks->begin(); it != this->mlocks->end(); ++it)
		{
			const ModeLock *ml = *it;

			if (ml->name == mode->name && ml->set == status && ml->param == param)
				return true;
		}

		return false;
	}

	bool SetMLock(ChannelMode *mode, bool status, const Anope::string &param, Anope::string setter, time_t created = Anope::CurTime) anope_override
	{
		if (!mode)
			return false;

		RemoveMLock(mode, status, param);

		if (setter.empty())
			setter = ci->GetFounder() ? ci->GetFounder()->display : "Unknown";

		ModeLock *ml = new ModeLockImpl();
		ml->ci = ci->name;
		ml->set = status;
		ml->name = mode->name;
		ml->param = param;
		ml->setter = setter;
		ml->created = created;

		EventReturn MOD_RESULT;
		FOREACH_RESULT(OnMLock, MOD_RESULT, (this->ci, ml));
		if (MOD_RESULT == EVENT_STOP)
		{
			delete ml;
			return false;
		}

		this->mlocks->push_back(ml);
		return true;
	}

	bool RemoveMLock(ChannelMode *mode, bool status, const Anope::string &param = "") anope_override
	{
		if (!mode)
			return false;

		for (ModeList::iterator it = this->mlocks->begin(); it != this->mlocks->end(); ++it)
		{
			ModeLock *m = *it;

			if (m->name == mode->name)
			{
				// For list or status modes, we must check the parameter
				if (mode->type == MODE_LIST || mode->type == MODE_STATUS)
					if (m->param != param)
						continue;

				EventReturn MOD_RESULT;
				FOREACH_RESULT(OnUnMLock, MOD_RESULT, (this->ci, m));
				if (MOD_RESULT == EVENT_STOP)
					break;

				delete m;
				return true;
			}
		}

		return false;
	}

	void RemoveMLock(ModeLock *mlock) anope_override
	{
		ModeList::iterator it = std::find(this->mlocks->begin(), this->mlocks->end(), mlock);
		if (it != this->mlocks->end())
			this->mlocks->erase(it);
	}

	void ClearMLock() anope_override
	{
		ModeList ml;
		this->mlocks->swap(ml);
		for (unsigned i = 0; i < ml.size(); ++i)
			delete ml[i];
	}

	const ModeList &GetMLock() const anope_override
	{
		return this->mlocks;
	}

	std::list<ModeLock *> GetModeLockList(const Anope::string &name) anope_override
	{
		std::list<ModeLock *> mlist;
		for (ModeList::const_iterator it = this->mlocks->begin(); it != this->mlocks->end(); ++it)
		{
			ModeLock *m = *it;
			if (m->name == name)
				mlist.push_back(m);
		}
		return mlist;
	}

	const ModeLock *GetMLock(const Anope::string &mname, const Anope::string &param = "") anope_override
	{
		for (ModeList::const_iterator it = this->mlocks->begin(); it != this->mlocks->end(); ++it)
		{
			ModeLock *m = *it;

			if (m->name == mname && m->param == param)
				return m;
		}

		return NULL;
	}

	Anope::string GetMLockAsString(bool complete) const anope_override
	{
		Anope::string pos = "+", neg = "-", params;

		for (ModeList::const_iterator it = this->mlocks->begin(); it != this->mlocks->end(); ++it)
		{
			const ModeLock *ml = *it;
			ChannelMode *cm = ModeManager::FindChannelModeByName(ml->name);

			if (!cm || cm->type == MODE_LIST || cm->type == MODE_STATUS)
				continue;

			if (ml->set)
				pos += cm->mchar;
			else
				neg += cm->mchar;

			if (complete && ml->set && !ml->param.empty() && cm->type == MODE_PARAM)
				params += " " + ml->param;
		}

		if (pos.length() == 1)
			pos.clear();
		if (neg.length() == 1)
			neg.clear();

		return pos + neg + params;
	}

	void Check() anope_override
	{
		if (this->mlocks->empty())
			ci->Shrink<ModeLocks>("modelocks");
	}
};

void ModeLockImpl::Serialize(Serialize::Data &data) const
{
	data["ci"] << this->ci;
	data["set"] << this->set;
	data["name"] << this->name;
	data["param"] << this->param;
	data["setter"] << this->setter;
	data.SetType("created", Serialize::Data::DT_INT); data["created"] << this->created;
}

Serializable* ModeLockImpl::Unserialize(Serializable *obj, Serialize::Data &data)
{
	Anope::string sci;

	data["ci"] >> sci;

	ChannelInfo *ci = ChannelInfo::Find(sci);
	if (!ci)
		return NULL;

	ModeLockImpl *ml;
	if (obj)
		ml = anope_dynamic_static_cast<ModeLockImpl *>(obj);
	else
	{
		ml = new ModeLockImpl();
		ml->ci = ci->name;
	}

	data["set"] >> ml->set;
	data["created"] >> ml->created;
	data["setter"] >> ml->setter;
	data["name"] >> ml->name;
	data["param"] >> ml->param;

	if (!obj)
		ci->Require<ModeLocksImpl>("modelocks")->mlocks->push_back(ml);

	return ml;
}

class CommandCSMode : public Command
{
	bool CanSet(CommandSource &source, ChannelInfo *ci, ChannelMode *cm, bool self)
	{
		if (!ci || !cm || cm->type != MODE_STATUS)
			return false;

		return source.AccessFor(ci).HasPriv(cm->name + (self ? "ME" : ""));
	}

	void DoLock(CommandSource &source, ChannelInfo *ci, const std::vector<Anope::string> &params)
	{
		User *u = source.GetUser();
		const Anope::string &subcommand = params[2];
		const Anope::string &param = params.size() > 3 ? params[3] : "";

		bool override = !source.AccessFor(ci).HasPriv("MODE");
		ModeLocks *modelocks = ci->Require<ModeLocks>("modelocks");

		if (Anope::ReadOnly && !subcommand.equals_ci("LIST"))
		{
			source.Reply(READ_ONLY_MODE);
			return;
		}

		if ((subcommand.equals_ci("ADD") || subcommand.equals_ci("SET")) && !param.empty())
		{
			/* If setting, remove the existing locks */
			if (subcommand.equals_ci("SET"))
			{
				const ModeLocks::ModeList mlocks = modelocks->GetMLock();
				for (ModeLocks::ModeList::const_iterator it = mlocks.begin(); it != mlocks.end(); ++it)
				{
					const ModeLock *ml = *it;
					ChannelMode *cm = ModeManager::FindChannelModeByName(ml->name);
					if (cm && cm->CanSet(source.GetUser()))
						modelocks->RemoveMLock(cm, ml->set, ml->param);
				}
			}

			spacesepstream sep(param);
			Anope::string modes;

			sep.GetToken(modes);

			Anope::string pos = "+", neg = "-", pos_params, neg_params;

			int adding = 1;
			bool needreply = true;
			for (size_t i = 0; i < modes.length(); ++i)
			{
				switch (modes[i])
				{
					case '+':
						adding = 1;
						break;
					case '-':
						adding = 0;
						break;
					default:
						needreply = false;
						ChannelMode *cm = ModeManager::FindChannelModeByChar(modes[i]);
						if (!cm)
						{
							source.Reply(_("Unknown mode character %c ignored."), modes[i]);
							break;
						}
						else if (u && !cm->CanSet(u))
						{
							source.Reply(_("You may not (un)lock mode %c."), modes[i]);
							break;
						}

						Anope::string mode_param;
						if (((cm->type == MODE_STATUS || cm->type == MODE_LIST) && !sep.GetToken(mode_param)) || (cm->type == MODE_PARAM && adding && !sep.GetToken(mode_param)))
						{
							source.Reply(_("Missing parameter for mode %c."), cm->mchar);
							continue;
						}

						if (cm->type == MODE_STATUS && !CanSet(source, ci, cm, false))
						{
							source.Reply(ACCESS_DENIED);
							continue;
						}

						if (cm->type == MODE_LIST && ci->c && IRCD->GetMaxListFor(ci->c, cm) && ci->c->HasMode(cm->name) >= IRCD->GetMaxListFor(ci->c, cm))
						{
							source.Reply(_("List for mode %c is full."), cm->mchar);
							continue;
						}

						if (modelocks->GetMLock().size() >= Config->GetModule(this->owner)->Get<unsigned>("max", "32"))
						{
							source.Reply(_("The mode lock list of \002%s\002 is full."), ci->name.c_str());
							continue;
						}

						modelocks->SetMLock(cm, adding, mode_param, source.GetNick());

						if (adding)
						{
							pos += cm->mchar;
							if (!mode_param.empty())
								pos_params += " " + mode_param;
						}
						else
						{
							neg += cm->mchar;
							if (!mode_param.empty())
								neg_params += " " + mode_param;
						}
				}
			}

			if (pos == "+")
				pos.clear();
			if (neg == "-")
				neg.clear();
			Anope::string reply = pos + neg + pos_params + neg_params;

			if (!reply.empty())
			{
				source.Reply(_("%s locked on %s."), reply.c_str(), ci->name.c_str());
				Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "to lock " << reply;
			}
			else if (needreply)
				source.Reply(_("Nothing to do."));

			if (ci->c)
				ci->c->CheckModes();
		}
		else if (subcommand.equals_ci("DEL") && !param.empty())
		{
			spacesepstream sep(param);
			Anope::string modes;

			sep.GetToken(modes);

			int adding = 1;
			bool needreply = true;
			for (size_t i = 0; i < modes.length(); ++i)
			{
				switch (modes[i])
				{
					case '+':
						adding = 1;
						break;
					case '-':
						adding = 0;
						break;
					default:
						needreply = false;
						ChannelMode *cm = ModeManager::FindChannelModeByChar(modes[i]);
						if (!cm)
						{
							source.Reply(_("Unknown mode character %c ignored."), modes[i]);
							break;
						}
						else if (u && !cm->CanSet(u))
						{
							source.Reply(_("You may not (un)lock mode %c."), modes[i]);
							break;
						}

						Anope::string mode_param;
						if (cm->type != MODE_REGULAR && !sep.GetToken(mode_param))
							source.Reply(_("Missing parameter for mode %c."), cm->mchar);
						else
						{
							if (modelocks->RemoveMLock(cm, adding, mode_param))
							{
								if (!mode_param.empty())
									mode_param = " " + mode_param;
								source.Reply(_("%c%c%s has been unlocked from %s."), adding == 1 ? '+' : '-', cm->mchar, mode_param.c_str(), ci->name.c_str());
								Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "to unlock " << (adding ? '+' : '-') << cm->mchar << mode_param;
							}
							else
								source.Reply(_("%c%c is not locked on %s."), adding == 1 ? '+' : '-', cm->mchar, ci->name.c_str());
						}
				}
			}

			if (needreply)
				source.Reply(_("Nothing to do."));
		}
		else if (subcommand.equals_ci("LIST"))
		{
			const ModeLocks::ModeList mlocks = modelocks->GetMLock();
			if (mlocks.empty())
			{
				source.Reply(_("Channel %s has no mode locks."), ci->name.c_str());
			}
			else
			{
				ListFormatter list(source.GetAccount());
				list.AddColumn(_("Mode")).AddColumn(_("Param")).AddColumn(_("Creator")).AddColumn(_("Created"));

				for (ModeLocks::ModeList::const_iterator it = mlocks.begin(), it_end = mlocks.end(); it != it_end; ++it)
				{
					const ModeLock *ml = *it;
					ChannelMode *cm = ModeManager::FindChannelModeByName(ml->name);
					if (!cm)
						continue;

					ListFormatter::ListEntry entry;
					entry["Mode"] = Anope::printf("%c%c", ml->set ? '+' : '-', cm->mchar);
					entry["Param"] = ml->param;
					entry["Creator"] = ml->setter;
					entry["Created"] = Anope::strftime(ml->created, NULL, true);
					list.AddEntry(entry);
				}

				source.Reply(_("Mode locks for %s:"), ci->name.c_str());

				std::vector<Anope::string> replies;
				list.Process(replies);

				for (unsigned i = 0; i < replies.size(); ++i)
					source.Reply(replies[i]);
			}
		}
		else
			this->OnSyntaxError(source, subcommand);
	}

	void DoSet(CommandSource &source, ChannelInfo *ci, const std::vector<Anope::string> &params)
	{
		User *u = source.GetUser();

		bool has_access = source.AccessFor(ci).HasPriv("MODE") || source.HasPriv("chanserv/administration");
		bool can_override = source.HasPriv("chanserv/administration");

		spacesepstream sep(params.size() > 3 ? params[3] : "");
		Anope::string modes = params[2], param;

		bool override = !source.AccessFor(ci).HasPriv("MODE") && source.HasPriv("chanserv/administration");

		int adding = -1;
		for (size_t i = 0; i < modes.length(); ++i)
		{
			switch (modes[i])
			{
				case '+':
					adding = 1;
					break;
				case '-':
					adding = 0;
					break;
				case '*':
					if (adding == -1 || !has_access)
						break;
					for (unsigned j = 0; j < ModeManager::GetChannelModes().size() && ci->c; ++j)
					{
						ChannelMode *cm = ModeManager::GetChannelModes()[j];

						if (!u || cm->CanSet(u) || can_override)
						{
							if (cm->type == MODE_REGULAR || (!adding && cm->type == MODE_PARAM))
							{
								if (adding)
									ci->c->SetMode(NULL, cm);
								else
									ci->c->RemoveMode(NULL, cm);
							}
						}
					}
					break;
				default:
					if (adding == -1)
						break;
					ChannelMode *cm = ModeManager::FindChannelModeByChar(modes[i]);
					if (!cm || (u && !cm->CanSet(u) && !can_override))
						continue;
					switch (cm->type)
					{
						case MODE_REGULAR:
							if (!has_access)
								break;
							if (adding)
								ci->c->SetMode(NULL, cm);
							else
								ci->c->RemoveMode(NULL, cm);
							break;
						case MODE_PARAM:
							if (!has_access)
								break;
							if (adding && !sep.GetToken(param))
								break;
							if (adding)
								ci->c->SetMode(NULL, cm, param);
							else
								ci->c->RemoveMode(NULL, cm);
							break;
						case MODE_STATUS:
						{
							if (!sep.GetToken(param))
								param = source.GetNick();

							AccessGroup u_access = source.AccessFor(ci);

							if (param.find_first_of("*?") != Anope::string::npos)
							{
								if (!this->CanSet(source, ci, cm, false))
								{
									if (can_override)
									{
										override = true;
									}
									else
									{
										source.Reply(_("You do not have access to set mode %c."), cm->mchar);
										break;
									}
								}

								for (Channel::ChanUserList::const_iterator it = ci->c->users.begin(), it_end = ci->c->users.end(); it != it_end;)
								{
									ChanUserContainer *uc = it->second;
									++it;

									AccessGroup targ_access = ci->AccessFor(uc->user);

									if (uc->user->IsProtected())
									{
										source.Reply(_("You do not have the access to change %s's modes."), uc->user->nick.c_str());
										continue;
									}

									if (ci->HasExt("PEACE") && targ_access >= u_access)
									{
										if (can_override)
										{
											override = true;
										}
										else
										{
											source.Reply(_("You do not have the access to change %s's modes."), uc->user->nick.c_str());
											continue;
										}
									}

									if (Anope::Match(uc->user->GetMask(), param))
									{
										if (adding)
											ci->c->SetMode(NULL, cm, uc->user->GetUID());
										else
											ci->c->RemoveMode(NULL, cm, uc->user->GetUID());
									}
								}
							}
							else
							{
								User *target = User::Find(param, true);
								if (target == NULL)
								{
									source.Reply(NICK_X_NOT_IN_USE, param.c_str());
									break;
								}

								if (!this->CanSet(source, ci, cm, source.GetUser() == target))
								{
									if (can_override)
									{
										override = true;
									}
									else
									{
										source.Reply(_("You do not have access to set mode %c."), cm->mchar);
										break;
									}
								}

								if (source.GetUser() != target)
								{
									AccessGroup targ_access = ci->AccessFor(target);
									if (ci->HasExt("PEACE") && targ_access >= u_access)
									{
										source.Reply(_("You do not have the access to change %s's modes."), target->nick.c_str());
										break;
									}
									else if (can_override)
									{
										override = true;
									}
									else if (target->IsProtected())
									{
										source.Reply(ACCESS_DENIED);
										break;
									}
								}

								if (adding)
									ci->c->SetMode(NULL, cm, target->GetUID());
								else
									ci->c->RemoveMode(NULL, cm, target->GetUID());
							}
							break;
						}
						case MODE_LIST:
							if (!has_access)
								break;
							if (!sep.GetToken(param))
								break;

							// Change to internal name, eg giving -b ~q:*
							cm = cm->Unwrap(param);

							if (adding)
							{
								if (IRCD->GetMaxListFor(ci->c, cm) && ci->c->HasMode(cm->name) < IRCD->GetMaxListFor(ci->c, cm))
									ci->c->SetMode(NULL, cm, param);
							}
							else
							{
								std::vector<Anope::string> v = ci->c->GetModeList(cm->name);
								for (unsigned j = 0; j < v.size(); ++j)
									if (Anope::Match(v[j], param))
										ci->c->RemoveMode(NULL, cm, v[j]);
							}
					}
			} // switch
		}

		Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "to set " << modes << (params.size() > 3 ? " " + params[3] : "");
	}

	void DoClear(CommandSource &source, ChannelInfo *ci, const std::vector<Anope::string> &params)
	{
		const Anope::string &param = params.size() > 2 ? params[2] : "";

		if (param.empty())
		{
			std::vector<Anope::string> new_params;
			new_params.push_back(params[0]);
			new_params.push_back("SET");
			new_params.push_back("-*");
			this->DoSet(source, ci, new_params);
			return;
		}

		ChannelMode *cm;
		if (param.length() == 1)
			cm = ModeManager::FindChannelModeByChar(param[0]);
		else
		{
			cm = ModeManager::FindChannelModeByName(param.upper());
			if (!cm)
				cm = ModeManager::FindChannelModeByName(param.substr(0, param.length() - 1).upper());
		}

		if (!cm)
		{
			source.Reply(_("There is no such mode %s."), param.c_str());
			return;
		}

		if (cm->type != MODE_STATUS && cm->type != MODE_LIST)
		{
			source.Reply(_("Mode %s is not a status or list mode."), param.c_str());
			return;
		}

		if (!cm->mchar)
		{
			source.Reply(_("Mode %s is a virtual mode and can't be cleared."), cm->name.c_str());
			return;
		}

		std::vector<Anope::string> new_params;
		new_params.push_back(params[0]);
		new_params.push_back("SET");
		new_params.push_back("-" + stringify(cm->mchar));
		new_params.push_back("*");
		this->DoSet(source, ci, new_params);
	}

 public:
	CommandCSMode(Module *creator) : Command(creator, "chanserv/mode", 2, 4)
	{
		this->SetDesc(_("Control modes and mode locks on a channel"));
		this->SetSyntax(_("\037channel\037 LOCK {ADD|DEL|SET|LIST} [\037what\037]"));
		this->SetSyntax(_("\037channel\037 SET \037modes\037"));
		this->SetSyntax(_("\037channel\037 CLEAR [\037what\037]"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		const Anope::string &subcommand = params[1];

		ChannelInfo *ci = ChannelInfo::Find(params[0]);

		if (!ci)
			source.Reply(CHAN_X_NOT_REGISTERED, params[0].c_str());
		else if (subcommand.equals_ci("LOCK") && params.size() > 2)
		{
			if (!source.AccessFor(ci).HasPriv("MODE") && !source.HasPriv("chanserv/administration"))
				source.Reply(ACCESS_DENIED);
			else
				this->DoLock(source, ci, params);
		}
		else if (!ci->c)
			source.Reply(CHAN_X_NOT_IN_USE, params[0].c_str());
		else if (subcommand.equals_ci("SET") && params.size() > 2)
			this->DoSet(source, ci, params);
		else if (subcommand.equals_ci("CLEAR"))
		{
			if (!source.AccessFor(ci).HasPriv("MODE") && !source.HasPriv("chanserv/administration"))
				source.Reply(ACCESS_DENIED);
			else
				this->DoClear(source, ci, params);
		}
		else
			this->OnSyntaxError(source, "");
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_("Mainly controls mode locks and mode access (which is different from channel access)\n"
			"on a channel.\n"
			" \n"
			"The \002%s LOCK\002 command allows you to add, delete, and view mode locks on a channel.\n"
			"If a mode is locked on or off, services will not allow that mode to be changed. The \002SET\002\n"
			"command will clear all existing mode locks and set the new one given, while \002ADD\002 and \002DEL\002\n"
			"modify the existing mode lock.\n"
			"Example:\n"
			"     \002MODE #channel LOCK ADD +bmnt *!*@*aol*\002\n"
			" \n"
			"The \002%s SET\002 command allows you to set modes through services. Wildcards * and ? may\n"
			"be given as parameters for list and status modes.\n"
			"Example:\n"
			"     \002MODE #channel SET +v *\002\n"
			"       Sets voice status to all users in the channel.\n"
			" \n"
			"     \002MODE #channel SET -b ~c:*\n"
			"       Clears all extended bans that start with ~c:\n"
			" \n"
			"The \002%s CLEAR\002 command is an easy way to clear modes on a channel. \037what\037 may be\n"
			"any mode name. Examples include bans, excepts, inviteoverrides, ops, halfops, and voices. If \037what\037\n"
			"is not given then all basic modes are removed."),
			source.command.upper().c_str(), source.command.upper().c_str(), source.command.upper().c_str());
		return true;
	}
};

static Anope::map<std::pair<bool, Anope::string> > modes;

class CommandCSModes : public Command
{
 public:
	CommandCSModes(Module *creator) : Command(creator, "chanserv/modes", 1, 2)
	{
		this->SetSyntax(_("\037channel\037 [\037user\037]"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		User *u = source.GetUser(),
			*targ = params.size() > 1 ? User::Find(params[1], true) : u;
		ChannelInfo *ci = ChannelInfo::Find(params[0]);

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

		if (!ci)
		{
			source.Reply(CHAN_X_NOT_REGISTERED, params[0].c_str());
			return;
		}
		else if (!ci->c)
		{
			source.Reply(CHAN_X_NOT_IN_USE, ci->name.c_str());
			return;
		}

		AccessGroup u_access = source.AccessFor(ci), targ_access = ci->AccessFor(targ);
		const std::pair<bool, Anope::string> &m = modes[source.command];

		bool can_override = source.HasPriv("chanserv/administration");
		bool override = false;

		if (m.second.empty())
		{
			source.Reply(ACCESS_DENIED);
			return;
		}

		if (u == targ ? !u_access.HasPriv(m.second + "ME") : !u_access.HasPriv(m.second))
		{
			if (!can_override)
			{
				source.Reply(ACCESS_DENIED);
				return;
			}
			else
				override = true;
		}

		if (!override && !m.first && u != targ && (targ->IsProtected() || (ci->HasExt("PEACE") && targ_access >= u_access)))
		{
			if (!can_override)
			{
				source.Reply(ACCESS_DENIED);
				return;
			}
			else
				override = true;
		}

		if (!ci->c->FindUser(targ))
		{
			source.Reply(NICK_X_NOT_ON_CHAN, targ->nick.c_str(), ci->name.c_str());
			return;
		}

		if (m.first)
			ci->c->SetMode(NULL, m.second, targ->GetUID());
		else
			ci->c->RemoveMode(NULL, m.second, targ->GetUID());

		Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "on " << targ->nick;
	}

	const Anope::string GetDesc(CommandSource &source) const anope_override
	{
		const std::pair<bool, Anope::string> &m = modes[source.command];
		if (!m.second.empty())
		{
			if (m.first)
				return Anope::printf(Language::Translate(source.GetAccount(), _("Gives you or the specified nick %s status on a channel")), m.second.c_str());
			else
				return Anope::printf(Language::Translate(source.GetAccount(), _("Removes %s status from you or the specified nick on a channel")), m.second.c_str());
		}
		else
			return "";
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
	{
		const std::pair<bool, Anope::string> &m = modes[source.command];
		if (m.second.empty())
			return false;

		this->SendSyntax(source);
		source.Reply(" ");
		if (m.first)
			source.Reply(_("Gives %s status to the selected nick on a channel. If \037nick\037 is\n"
					"not given, it will %s you."),
					m.second.upper().c_str(), m.second.lower().c_str());
		else
			source.Reply(_("Removes %s status from the selected nick on a channel. If \037nick\037 is\n"
					"not given, it will de%s you."),
					 m.second.upper().c_str(), m.second.lower().c_str());
		source.Reply(" ");
		source.Reply(_("You must have the %s(ME) privilege on the channel to use this command."), m.second.upper().c_str());

		return true;
	}
};

class CSMode : public Module
{
	CommandCSMode commandcsmode;
	CommandCSModes commandcsmodes;
	ExtensibleItem<ModeLocksImpl> modelocks;
	Serialize::Type modelocks_type;

 public:
	CSMode(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR),
		commandcsmode(this), commandcsmodes(this),
		modelocks(this, "modelocks"),
		modelocks_type("ModeLock", ModeLockImpl::Unserialize)
	{

	}

	void OnReload(Configuration::Conf *conf) anope_override
	{
		modes.clear();

		for (int i = 0; i < conf->CountBlock("command"); ++i)
		{
			Configuration::Block *block = conf->GetBlock("command", i);

			const Anope::string &cname = block->Get<const Anope::string>("name"),
					&cmd = block->Get<const Anope::string>("command");

			if (cname.empty() || cmd != "chanserv/modes")
				continue;

			const Anope::string &set = block->Get<const Anope::string>("set"),
					&unset = block->Get<const Anope::string>("unset");

			if (set.empty() && unset.empty())
				continue;

			modes[cname] = std::make_pair(!set.empty(), !set.empty() ? set : unset);
		}
	}

	void OnCheckModes(Reference<Channel> &c) anope_override
	{
		if (!c || !c->ci)
			return;

		ModeLocks *locks = modelocks.Get(c->ci);
		if (locks)
			for (ModeLocks::ModeList::const_iterator it = locks->GetMLock().begin(), it_end = locks->GetMLock().end(); it != it_end; ++it)
			{
				const ModeLock *ml = *it;
				ChannelMode *cm = ModeManager::FindChannelModeByName(ml->name);
				if (!cm)
					continue;

				if (cm->type == MODE_REGULAR)
				{
					if (!c->HasMode(cm->name) && ml->set)
						c->SetMode(NULL, cm, "", false);
					else if (c->HasMode(cm->name) && !ml->set)
						c->RemoveMode(NULL, cm, "", false);
				}
				else if (cm->type == MODE_PARAM)
				{
					/* If the channel doesn't have the mode, or it does and it isn't set correctly */
					if (ml->set)
					{
						Anope::string param;
						c->GetParam(cm->name, param);

						if (!c->HasMode(cm->name) || (!param.empty() && !ml->param.empty() && !param.equals_cs(ml->param)))
							c->SetMode(NULL, cm, ml->param, false);
					}
					else
					{
						if (c->HasMode(cm->name))
							c->RemoveMode(NULL, cm, "", false);
					}

				}
				else if (cm->type == MODE_LIST || cm->type == MODE_STATUS)
				{
					if (ml->set)
						c->SetMode(NULL, cm, ml->param, false);
					else
						c->RemoveMode(NULL, cm, ml->param, false);
				}
			}
	}

	void OnChanRegistered(ChannelInfo *ci) anope_override
	{
		ModeLocks *ml = modelocks.Require(ci);
		Anope::string mlock;
		spacesepstream sep(Config->GetModule(this)->Get<const Anope::string>("mlock", "+nt"));
		if (sep.GetToken(mlock))
		{
			bool add = true;
			for (unsigned i = 0; i < mlock.length(); ++i)
			{
				if (mlock[i] == '+')
				{
					add = true;
					continue;
				}

				if (mlock[i] == '-')
				{
					add = false;
					continue;
				}

				ChannelMode *cm = ModeManager::FindChannelModeByChar(mlock[i]);
				if (!cm)
					continue;

				Anope::string param;
				if (cm->type == MODE_PARAM)
				{
					ChannelModeParam *cmp = anope_dynamic_static_cast<ChannelModeParam *>(cm);
					if (add || !cmp->minus_no_arg)
					{
						sep.GetToken(param);
						if (param.empty() || !cmp->IsValid(param))
							continue;
					}
				}
				else if (cm->type != MODE_REGULAR)
				{
					sep.GetToken(param);
					if (param.empty())
						continue;
				}

				ml->SetMLock(cm, add, param);
			}
		}
		ml->Check();
	}

	void OnChanInfo(CommandSource &source, ChannelInfo *ci, InfoFormatter &info, bool show_hidden) anope_override
	{
		if (!show_hidden)
			return;

		ModeLocks *ml = modelocks.Get(ci);
		if (ml)
			info[_("Mode lock")] = ml->GetMLockAsString(true);
	}
};

MODULE_INIT(CSMode)