/* NickServ core functions
 *
 * (C) 2003-2020 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 CommandNSList : public Command
{
 public:
	CommandNSList(Module *creator) : Command(creator, "nickserv/list", 1, 2)
	{
		this->SetDesc(_("List all registered nicknames that match a given pattern"));
		this->SetSyntax(_("\037pattern\037 [SUSPENDED] [NOEXPIRE] [UNCONFIRMED]"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{

		Anope::string pattern = params[0];
		const NickCore *mync;
		unsigned nnicks;
		bool is_servadmin = source.HasCommand("nickserv/list");
		int count = 0, from = 0, to = 0;
		bool suspended, nsnoexpire, unconfirmed;
		unsigned listmax = Config->GetModule(this->owner)->Get<unsigned>("listmax", "50");

		suspended = nsnoexpire = unconfirmed = false;

		if (pattern[0] == '#')
		{
			Anope::string n1, n2;
			sepstream(pattern.substr(1), '-').GetToken(n1, 0);
			sepstream(pattern, '-').GetToken(n2, 1);
			try
			{
				from = convertTo<int>(n1);
				to = convertTo<int>(n2);
			}
			catch (const ConvertException &)
			{
				source.Reply(LIST_INCORRECT_RANGE);
				return;
			}

			pattern = "*";
		}

		nnicks = 0;

		if (is_servadmin && params.size() > 1)
		{
			Anope::string keyword;
			spacesepstream keywords(params[1]);
			while (keywords.GetToken(keyword))
			{
				if (keyword.equals_ci("NOEXPIRE"))
					nsnoexpire = true;
				if (keyword.equals_ci("SUSPENDED"))
					suspended = true;
				if (keyword.equals_ci("UNCONFIRMED"))
					unconfirmed = true;
			}
		}

		mync = source.nc;
		ListFormatter list(source.GetAccount());

		list.AddColumn(_("Nick")).AddColumn(_("Last usermask"));

		Anope::map<NickAlias *> ordered_map;
		for (nickalias_map::const_iterator it = NickAliasList->begin(), it_end = NickAliasList->end(); it != it_end; ++it)
			ordered_map[it->first] = it->second;

		for (Anope::map<NickAlias *>::const_iterator it = ordered_map.begin(), it_end = ordered_map.end(); it != it_end; ++it)
		{
			const NickAlias *na = it->second;

			/* Don't show private nicks to non-services admins. */
			if (na->nc->HasExt("NS_PRIVATE") && !is_servadmin && na->nc != mync)
				continue;
			else if (nsnoexpire && !na->HasExt("NS_NO_EXPIRE"))
				continue;
			else if (suspended && !na->nc->HasExt("NS_SUSPENDED"))
				continue;
			else if (unconfirmed && !na->nc->HasExt("UNCONFIRMED"))
				continue;

			/* We no longer compare the pattern against the output buffer.
			 * Instead we build a nice nick!user@host buffer to compare.
			 * The output is then generated separately. -TheShadow */
			Anope::string buf = Anope::printf("%s!%s", na->nick.c_str(), !na->last_usermask.empty() ? na->last_usermask.c_str() : "*@*");
			if (na->nick.equals_ci(pattern) || Anope::Match(buf, pattern, false, true))
			{
				if (((count + 1 >= from && count + 1 <= to) || (!from && !to)) && ++nnicks <= listmax)
				{
					bool isnoexpire = false;
					if (is_servadmin && na->HasExt("NS_NO_EXPIRE"))
						isnoexpire = true;

					ListFormatter::ListEntry entry;
					entry["Nick"] = (isnoexpire ? "!" : "") + na->nick;
					if (na->nc->HasExt("HIDE_MASK") && !is_servadmin && na->nc != mync)
						entry["Last usermask"] = Language::Translate(source.GetAccount(), _("[Hostname hidden]"));
					else if (na->nc->HasExt("NS_SUSPENDED"))
						entry["Last usermask"] = Language::Translate(source.GetAccount(), _("[Suspended]"));
					else if (na->nc->HasExt("UNCONFIRMED"))
						entry["Last usermask"] = Language::Translate(source.GetAccount(), _("[Unconfirmed]"));
					else
						entry["Last usermask"] = na->last_usermask;
					list.AddEntry(entry);
				}
				++count;
			}
		}

		source.Reply(_("List of entries matching \002%s\002:"), pattern.c_str());

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

		for (unsigned i = 0; i < replies.size(); ++i)
			source.Reply(replies[i]);

		source.Reply(_("End of list - %d/%d matches shown."), nnicks > listmax ? listmax : nnicks, nnicks);
		return;
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_("Lists all registered nicknames which match the given\n"
				"pattern, in \037nick!user@host\037 format.  Nicks with the \002PRIVATE\002\n"
				"option set will only be displayed to Services Operators with the\n"
				"proper access.  Nicks with the \002NOEXPIRE\002 option set will have\n"
				"a \002!\002 prefixed to the nickname for Services Operators to see.\n"
				" \n"
				"Note that a preceding '#' specifies a range.\n"
				" \n"
				"If the SUSPENDED, UNCONFIRMED or NOEXPIRE options are given, only\n"
				"nicks which, respectively, are SUSPENDED, UNCONFIRMED or have the\n"
				"NOEXPIRE flag set will be displayed. If multiple options are\n"
				"given, all nicks matching at least one option will be displayed.\n"
				"Note that these options are limited to \037Services Operators\037.\n"
				" \n"
				"Examples:\n"
				" \n"
				"    \002LIST *!joeuser@foo.com\002\n"
				"        Lists all registered nicks owned by joeuser@foo.com.\n"
				" \n"
				"    \002LIST *Bot*!*@*\002\n"
				"        Lists all registered nicks with \002Bot\002 in their\n"
				"        names (case insensitive).\n"
				" \n"
				"    \002LIST * NOEXPIRE\002\n"
				"        Lists all registered nicks which have been set to not expire.\n"
				" \n"
				"    \002LIST #51-100\002\n"
				"        Lists all registered nicks within the given range (51-100)."));

		const Anope::string &regexengine = Config->GetBlock("options")->Get<const Anope::string>("regexengine");
		if (!regexengine.empty())
		{
			source.Reply(" ");
			source.Reply(_("Regex matches are also supported using the %s engine.\n"
					"Enclose your pattern in // if this is desired."), regexengine.c_str());
		}

		return true;
	}
};


class CommandNSSetPrivate : public Command
{
 public:
	CommandNSSetPrivate(Module *creator, const Anope::string &sname = "nickserv/set/private", size_t min = 1) : Command(creator, sname, min, min + 1)
	{
		this->SetDesc(_("Prevent the nickname from appearing in the LIST command"));
		this->SetSyntax("{ON | OFF}");
	}

	void Run(CommandSource &source, const Anope::string &user, const Anope::string &param)
	{
		if (Anope::ReadOnly)
		{
			source.Reply(READ_ONLY_MODE);
			return;
		}

		const NickAlias *na = NickAlias::Find(user);
		if (!na)
		{
			source.Reply(NICK_X_NOT_REGISTERED, user.c_str());
			return;
		}
		NickCore *nc = na->nc;

		EventReturn MOD_RESULT;
		FOREACH_RESULT(OnSetNickOption, MOD_RESULT, (source, this, nc, param));
		if (MOD_RESULT == EVENT_STOP)
			return;

		if (param.equals_ci("ON"))
		{
			Log(nc == source.GetAccount() ? LOG_COMMAND : LOG_ADMIN, source, this) << "to enable private for " << nc->display;
			nc->Extend<bool>("NS_PRIVATE");
			source.Reply(_("Private option is now \002on\002 for \002%s\002."), nc->display.c_str());
		}
		else if (param.equals_ci("OFF"))
		{
			Log(nc == source.GetAccount() ? LOG_COMMAND : LOG_ADMIN, source, this) << "to disable private for " << nc->display;
			nc->Shrink<bool>("NS_PRIVATE");
			source.Reply(_("Private option is now \002off\002 for \002%s\002."), nc->display.c_str());
		}
		else
			this->OnSyntaxError(source, "PRIVATE");
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		this->Run(source, source.nc->display, params[0]);
	}

	bool OnHelp(CommandSource &source, const Anope::string &) anope_override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_("Turns %s's privacy option on or off for your nick.\n"
				"With \002PRIVATE\002 set, your nickname will not appear in\n"
				"nickname lists generated with %s's \002LIST\002 command.\n"
				"(However, anyone who knows your nickname can still get\n"
				"information on it using the \002INFO\002 command.)"),
				source.service->nick.c_str(), source.service->nick.c_str());
		return true;
	}
};

class CommandNSSASetPrivate : public CommandNSSetPrivate
{
 public:
	CommandNSSASetPrivate(Module *creator) : CommandNSSetPrivate(creator, "nickserv/saset/private", 2)
	{
		this->ClearSyntax();
		this->SetSyntax(_("\037nickname\037 {ON | OFF}"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		this->Run(source, params[0], params[1]);
	}

	bool OnHelp(CommandSource &source, const Anope::string &) anope_override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_("Turns %s's privacy option on or off for the nick.\n"
				"With \002PRIVATE\002 set, the nickname will not appear in\n"
				"nickname lists generated with %s's \002LIST\002 command.\n"
				"(However, anyone who knows the nickname can still get\n"
				"information on it using the \002INFO\002 command.)"),
				source.service->nick.c_str(), source.service->nick.c_str());
		return true;
	}
};


class NSList : public Module
{
	CommandNSList commandnslist;

	CommandNSSetPrivate commandnssetprivate;
	CommandNSSASetPrivate commandnssasetprivate;

	SerializableExtensibleItem<bool> priv;

 public:
	NSList(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR),
		commandnslist(this), commandnssetprivate(this), commandnssasetprivate(this),
		priv(this, "NS_PRIVATE")
	{
	}

	void OnNickInfo(CommandSource &source, NickAlias *na, InfoFormatter &info, bool show_all) anope_override
	{
		if (!show_all)
			return;

		if (priv.HasExt(na->nc))
			info.AddOption(_("Private"));
	}
};

MODULE_INIT(NSList)
