/* 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 CommandNSAccess : public Command
{
 private:
	void DoAdd(CommandSource &source, NickCore *nc, const Anope::string &mask)
	{
		if (mask.empty())
		{
			this->OnSyntaxError(source, "ADD");
			return;
		}

		if (Anope::ReadOnly)
		{
			source.Reply(READ_ONLY_MODE);
			return;
		}

		if (nc->access.size() >= Config->GetModule(this->owner)->Get<unsigned>("accessmax", "32"))
		{
			source.Reply(_("Sorry, the maximum of %d access entries has been reached."), Config->GetModule(this->owner)->Get<unsigned>("accessmax"));
			return;
		}

		if (nc->FindAccess(mask))
		{
			source.Reply(_("Mask \002%s\002 already present on %s's access list."), mask.c_str(), nc->display.c_str());
			return;
		}

		nc->AddAccess(mask);
		Log(nc == source.GetAccount() ? LOG_COMMAND : LOG_ADMIN, source, this) << "to ADD mask " << mask << " to " << nc->display;
		source.Reply(_("\002%s\002 added to %s's access list."), mask.c_str(), nc->display.c_str());

		return;
	}

	void DoDel(CommandSource &source, NickCore *nc, const Anope::string &mask)
	{
		if (mask.empty())
		{
			this->OnSyntaxError(source, "DEL");
			return;
		}

		if (Anope::ReadOnly)
		{
			source.Reply(READ_ONLY_MODE);
			return;
		}

		if (!nc->FindAccess(mask))
		{
			source.Reply(_("\002%s\002 not found on %s's access list."), mask.c_str(), nc->display.c_str());
			return;
		}

		nc->EraseAccess(mask);
		Log(nc == source.GetAccount() ? LOG_COMMAND : LOG_ADMIN, source, this) << "to DELETE mask " << mask << " from " << nc->display;
		source.Reply(_("\002%s\002 deleted from %s's access list."), mask.c_str(), nc->display.c_str());

		return;
	}

	void DoList(CommandSource &source, NickCore *nc, const Anope::string &mask)
	{
		unsigned i, end;

		if (nc->access.empty())
		{
			source.Reply(_("%s's access list is empty."), nc->display.c_str());
			return;
		}

		source.Reply(_("Access list for %s:"), nc->display.c_str());
		for (i = 0, end = nc->access.size(); i < end; ++i)
		{
			Anope::string access = nc->GetAccess(i);
			if (!mask.empty() && !Anope::Match(access, mask))
				continue;
			source.Reply("    %s", access.c_str());
		}

		return;
	}
 public:
	CommandNSAccess(Module *creator) : Command(creator, "nickserv/access", 1, 3)
	{
		this->SetDesc(_("Modify the list of authorized addresses"));
		this->SetSyntax(_("ADD [\037nickname\037] \037mask\037"));
		this->SetSyntax(_("DEL [\037nickname\037] \037mask\037"));
		this->SetSyntax(_("LIST [\037nickname\037]"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		const Anope::string &cmd = params[0];
		Anope::string nick, mask;

		if (cmd.equals_ci("LIST"))
			nick = params.size() > 1 ? params[1] : "";
		else
		{
			nick = params.size() == 3 ? params[1] : "";
			mask = params.size() > 1 ? params[params.size() - 1] : "";
		}

		NickCore *nc;
		if (!nick.empty())
		{
			const NickAlias *na = NickAlias::Find(nick);
			if (na == NULL)
			{
				source.Reply(NICK_X_NOT_REGISTERED, nick.c_str());
				return;
			}
			else if (na->nc != source.GetAccount() && !source.HasPriv("nickserv/access"))
			{
				source.Reply(ACCESS_DENIED);
				return;
			}
			else if (Config->GetModule("nickserv")->Get<bool>("secureadmins", "yes") && source.GetAccount() != na->nc && na->nc->IsServicesOper() && !cmd.equals_ci("LIST"))
			{
				source.Reply(_("You may view but not modify the access list of other Services Operators."));
				return;
			}

			nc = na->nc;
		}
		else
			nc = source.nc;

		if (!mask.empty() && (mask.find('@') == Anope::string::npos || mask.find('!') != Anope::string::npos))
		{
			source.Reply(BAD_USERHOST_MASK);
			source.Reply(MORE_INFO, Config->StrictPrivmsg.c_str(), source.service->nick.c_str(), source.command.c_str());
		}
		else if (cmd.equals_ci("LIST"))
			return this->DoList(source, nc, mask);
		else if (nc->HasExt("NS_SUSPENDED"))
			source.Reply(NICK_X_SUSPENDED, nc->display.c_str());
		else if (cmd.equals_ci("ADD"))
			return this->DoAdd(source, nc, mask);
		else if (cmd.equals_ci("DEL"))
			return this->DoDel(source, nc, mask);
		else
			this->OnSyntaxError(source, "");
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_("Modifies or displays the access list for your nick.  This\n"
					"is the list of addresses which will be automatically\n"
					"recognized by %s as allowed to use the nick.  If\n"
					"you want to use the nick from a different address, you\n"
					"need to send an \002IDENTIFY\002 command to make %s\n"
					"recognize you. Services Operators may provide a nick\n"
					"to modify other users' access lists.\n"
					" \n"
					"Examples:\n"
					" \n"
					"    \002ACCESS ADD anyone@*.bepeg.com\002\n"
					"        Allows access to user \002anyone\002 from any machine in\n"
					"        the \002bepeg.com\002 domain.\n"
					" \n"
					"    \002ACCESS DEL anyone@*.bepeg.com\002\n"
					"        Reverses the previous command.\n"
					" \n"
					"    \002ACCESS LIST\002\n"
					"        Displays the current access list."), source.service->nick.c_str(), source.service->nick.c_str());
		return true;
	}
};

class NSAccess : public Module
{
	CommandNSAccess commandnsaccess;

 public:
	NSAccess(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR),
		commandnsaccess(this)
	{
	}

	void OnNickRegister(User *u, NickAlias *na, const Anope::string &) anope_override
	{
		if (u && Config->GetModule(this)->Get<bool>("addaccessonreg"))
			na->nc->AddAccess(u->Mask());
	}
};

MODULE_INIT(NSAccess)
