/*
 *  m_flags.c: Implements comstud-style mode flags.
 *
 *  Copyright 2002 by W. Campbell and the ircd-hybrid development team
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *  1.Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer. 
 *  2.Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution. 
 *  3.The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission. 
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 *  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 *  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 *
 *  $Id: m_flags.c 28681 2015-10-02 16:49:39Z androsyn $
 */

/* List of ircd includes from ../include/ */
#include "stdinc.h"
#include "ratbox_lib.h"
#include "struct.h"
#include "client.h"
#include "common.h"
#include "ircd.h"
#include "match.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_log.h"
#include "s_serv.h"
#include "send.h"
#include "parse.h"
#include "modules.h"
#include "s_user.h"		/* send_umode_out() */
#include "s_newconf.h"

static int m_flags(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
static int mo_flags(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);

static char *set_flags_to_string(struct Client *client_p);
static char *unset_flags_to_string(struct Client *client_p);


struct Message test_msgtab = {
	"FLAGS", 0, 0, 0, MFLG_SLOW,
	{mg_unreg, {m_flags, 0}, {m_flags, 0}, mg_ignore, mg_ignore, {mo_flags, 0}}
};


mapi_clist_av1 test_clist[] = { &test_msgtab, NULL };

DECLARE_MODULE_AV1(test, NULL, NULL, test_clist, NULL, NULL, "$Revision: 28681 $");


/* FLAGS requires it's own mini parser, since the last parameter in it can
** contain a number of FLAGS.  CS handles FLAGS mode1 mode2 OR
** FLAGS :mode1 mode2, but not both mixed.
**
** The best way to match a flag to a mode is with a simple table
*/

struct FlagTable
{
	const char *name;
	int mode;
	int oper;
};

/* *INDENT-OFF* */
static struct FlagTable flag_table[] = {
	/* name               mode it represents      oper only? */
#if 0
	/* This one is special...controlled via an oper block option */
	{ "OWALLOPS",		UMODE_OPERWALL,		1 },
#endif
	{ "SWALLOPS",		UMODE_WALLOP,		0 },
	{ "STATSNOTICES",	UMODE_SPY,		1 },
	/* We don't have a separate OKILL and SKILL modes */
	{ "OKILLS",		UMODE_SERVNOTICE,	0 },
	{ "SKILLS",		UMODE_SKILL,		0 },
	{ "SNOTICES",		UMODE_SERVNOTICE,	0 },
	/* We don't have separate client connect and disconnect modes */
	{ "CLICONNECTS",	UMODE_CCONN,		1 },
	{ "CLIDISCONNECTS",	UMODE_CCONN,		1 },
	/* I'm taking a wild guess here... */
	{ "THROTTLES",		UMODE_REJ,		1 },
#if 0
	/* This one is special...controlled via an oper block option */
	{ "NICKCHANGES",	UMODE_NCHANGE,		1 },
	/* NICKCHANGES must be checked for separately */
#endif
	/* I'm assuming this is correct... */
	{ "IPMISMATCHES",	UMODE_UNAUTH,		1 },
	{ "LWALLOPS",		UMODE_LOCOPS,		1 },
	/* These aren't separate on Hybrid */
	{ "CONNECTS",		UMODE_EXTERNAL,		1 },
	{ "SQUITS",		UMODE_EXTERNAL,		1 },
	/* Now we have our Hybrid specific flags */
	{ "FULL",		UMODE_FULL,		1 },
	/* Not in CS, but we might as well put it here */
	{ "INVISIBLE",		UMODE_INVISIBLE,	0 },
	{ "BOTS",		UMODE_BOTS,		1 },
	{ "CALLERID",		UMODE_CALLERID,		0 },
	{ "UNAUTH",		UMODE_UNAUTH,		1 },
	{ "DEBUG",		UMODE_DEBUG,		1 },
	{ NULL, 0, 0}
};
/* *INDENT-ON* */

/* We won't control CALLERID or INVISIBLE in here */

#define FL_ALL_USER_FLAGS (UMODE_WALLOP | UMODE_SKILL | UMODE_SERVNOTICE )

/* and we don't control NCHANGES here either */

#define FL_ALL_OPER_FLAGS (FL_ALL_USER_FLAGS | UMODE_CCONN | UMODE_REJ |\
                           UMODE_FULL | UMODE_SPY | UMODE_DEBUG |\
                           UMODE_BOTS | UMODE_EXTERNAL |\
                           UMODE_UNAUTH | UMODE_LOCOPS )

/*
** m_flags
**      parv[0] = sender prefix
**      parv[1] = parameter
*/
static int
m_flags(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
	int i, j;
	int isadd;
	int setflags;
	int isgood;
	char *p;
	char *flag;

	if(parc < 2)
	{
		/* Generate a list of what flags you have and what you are missing,
		 ** and send it to the user
		 */
		sendto_one(source_p, ":%s NOTICE %s :Current flags:%s",
			   me.name, parv[0], set_flags_to_string(source_p));
		sendto_one(source_p, ":%s NOTICE %s :Current missing flags:%s",
			   me.name, parv[0], unset_flags_to_string(source_p));
		return 1;
	}

	/* Preserve the current flags */
	setflags = source_p->umodes;

/* XXX - change this to support a multiple last parameter like ISON */

	for(i = 1; i < parc; i++)
	{
		char *s = LOCAL_COPY(parv[i]);
		for(flag = rb_strtok_r(s, " ", &p); flag; flag = rb_strtok_r(NULL, " ", &p))
		{
			/* We default to being in ADD mode */
			isadd = 1;

			/* We default to being in BAD mode */
			isgood = 0;

			if(!isalpha(flag[0]))
			{
				if(flag[0] == '-')
					isadd = 0;
				else if(flag[0] == '+')
					isadd = 1;
				flag++;
			}

			/* support ALL here */
			if(!irccmp(flag, "ALL"))
			{
				if(isadd)
					source_p->umodes |= FL_ALL_USER_FLAGS;
				else
					source_p->umodes &= ~FL_ALL_USER_FLAGS;
				sendto_one(source_p, ":%s NOTICE %s :Current flags:%s",
					   me.name, parv[0], set_flags_to_string(source_p));
				sendto_one(source_p, ":%s NOTICE %s :Current missing flags:%s",
					   me.name, parv[0], unset_flags_to_string(source_p));
				send_umode_out(client_p, source_p, setflags);
				return 1;
			}

			for(j = 0; flag_table[j].name; j++)
			{
				if(!flag_table[j].oper && !irccmp(flag, flag_table[j].name))
				{
					if(isadd)
						source_p->umodes |= flag_table[j].mode;
					else
						source_p->umodes &= ~(flag_table[j].mode);
					isgood = 1;
					continue;
				}
			}
			/* This for ended without matching a valid FLAG, here is where
			 ** I want to operate differently than ircd-comstud, and just ignore
			 ** the invalid flag, send a warning and go on.
			 */
			if(!isgood)
				sendto_one(source_p, ":%s NOTICE %s :Invalid FLAGS: %s (IGNORING)",
					   me.name, parv[0], flag);
		}
	}

	/* All done setting the flags, print the notices out to the user
	 ** telling what flags they have and what flags they are missing
	 */
	sendto_one(source_p, ":%s NOTICE %s :Current flags:%s",
		   me.name, parv[0], set_flags_to_string(source_p));
	sendto_one(source_p, ":%s NOTICE %s :Current missing flags:%s",
		   me.name, parv[0], unset_flags_to_string(source_p));

	send_umode_out(client_p, source_p, setflags);
	return 0;
}

/*
** mo_flags
**      parv[0] = sender prefix
**      parv[1] = parameter
*/
static int
mo_flags(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
	int i, j;
	int isadd;
	int setflags;
	int isgood;
	char *p;
	char *flag;

	if(parc < 2)
	{
		/* Generate a list of what flags you have and what you are missing,
		 ** and send it to the user
		 */
		sendto_one(source_p, ":%s NOTICE %s :Current flags:%s",
			   me.name, parv[0], set_flags_to_string(source_p));
		sendto_one(source_p, ":%s NOTICE %s :Current missing flags:%s",
			   me.name, parv[0], unset_flags_to_string(source_p));
		return 1;
	}

	/* Preserve the current flags */
	setflags = source_p->umodes;

/* XXX - change this to support a multiple last parameter like ISON */

	for(i = 1; i < parc; i++)
	{
		char *s = LOCAL_COPY(parv[i]);
		for(flag = rb_strtok_r(s, " ", &p); flag; flag = rb_strtok_r(NULL, " ", &p))
		{
			/* We default to being in ADD mode */
			isadd = 1;

			/* We default to being in BAD mode */
			isgood = 0;

			if(!isalpha(flag[0]))
			{
				if(flag[0] == '-')
					isadd = 0;
				else if(flag[0] == '+')
					isadd = 1;
				flag++;
			}

			/* support ALL here */
			if(!irccmp(flag, "ALL"))
			{
				if(isadd)
					source_p->umodes |= FL_ALL_OPER_FLAGS;
				else
					source_p->umodes &= ~FL_ALL_OPER_FLAGS;
				sendto_one(source_p, ":%s NOTICE %s :Current flags:%s",
					   me.name, parv[0], set_flags_to_string(source_p));
				sendto_one(source_p, ":%s NOTICE %s :Current missing flags:%s",
					   me.name, parv[0], unset_flags_to_string(source_p));
				send_umode_out(client_p, source_p, setflags);
				return 1;
			}

			if(!irccmp(flag, "NICKCHANGES"))
			{
				if(!IsOperN(source_p))
				{
					sendto_one(source_p,
						   ":%s NOTICE %s :*** You need oper and N flag for +n",
						   me.name, parv[0]);
					continue;
				}
				if(isadd)
					source_p->umodes |= UMODE_NCHANGE;
				else
					source_p->umodes &= ~UMODE_NCHANGE;
				isgood = 1;
				continue;
			}
			if(!irccmp(flag, "OWALLOPS"))
			{
				if(!IsOperOperwall(source_p))
				{
					sendto_one(source_p,
						   ":%s NOTICE %s :*** You need oper and operwall flag for +z",
						   me.name, parv[0]);
					continue;
				}
				if(isadd)
					source_p->umodes |= UMODE_OPERWALL;
				else
					source_p->umodes &= ~UMODE_OPERWALL;
				isgood = 1;
				continue;
			}

			for(j = 0; flag_table[j].name; j++)
			{
				if(!irccmp(flag, flag_table[j].name))
				{
					if(isadd)
						source_p->umodes |= flag_table[j].mode;
					else
						source_p->umodes &= ~(flag_table[j].mode);
					isgood = 1;
					continue;
				}
			}
			/* This for ended without matching a valid FLAG, here is where
			 ** I want to operate differently than ircd-comstud, and just ignore
			 ** the invalid flag, send a warning and go on.
			 */
			if(!isgood)
				sendto_one(source_p, ":%s NOTICE %s :Invalid FLAGS: %s (IGNORING)",
					   me.name, parv[0], flag);
		}
	}

	/* All done setting the flags, print the notices out to the user
	 ** telling what flags they have and what flags they are missing
	 */
	sendto_one(source_p, ":%s NOTICE %s :Current flags:%s",
		   me.name, parv[0], set_flags_to_string(source_p));
	sendto_one(source_p, ":%s NOTICE %s :Current missing flags:%s",
		   me.name, parv[0], unset_flags_to_string(source_p));

	send_umode_out(client_p, source_p, setflags);
	return 0;
}

static char *
set_flags_to_string(struct Client *client_p)
{
	/* XXX - list all flags that we have set on the client */
	static char setflags[BUFSIZE + 1];
	int i;

	/* Clear it to begin with, we'll be doing a lot of rb_sprintf's */
	setflags[0] = '\0';

	/* Unlike unset_flags_to_string(), we don't have to care about oper
	 ** flags and not showing them
	 */

	if(client_p->umodes & UMODE_OPERWALL)
	{
		rb_sprintf(setflags, "%s %s", setflags, "OWALLOPS");
	}

	for(i = 0; flag_table[i].name; i++)
	{
		if(client_p->umodes & flag_table[i].mode)
		{
			rb_sprintf(setflags, "%s %s", setflags, flag_table[i].name);
		}
	}

#if 0
	if(IsOper(client_p) && IsOperN(client_p))
	{
#endif
		/* You can only be set +NICKCHANGES if you are an oper and
		 ** IsOperN(client_p) is true
		 */
		if(client_p->umodes & UMODE_NCHANGE)
		{
			rb_sprintf(setflags, "%s %s", setflags, "NICKCHANGES");
		}
#if 0
	}
#endif

	return setflags;
}

static char *
unset_flags_to_string(struct Client *client_p)
{
	/* Inverse of above */
	/* XXX - list all flags that we do NOT have set on the client */
	static char setflags[BUFSIZE + 1];
	int i, isoper;

	/* Clear it to begin with, we'll be doing a lot of rb_sprintf's */
	setflags[0] = '\0';

	if(IsOper(client_p))
		isoper = 1;
	else
		isoper = 0;

	if(IsOper(client_p) && IsOperOperwall(client_p))
	{
		if(!(client_p->umodes & UMODE_OPERWALL))
		{
			rb_sprintf(setflags, "%s %s", setflags, "OWALLOPS");
		}
	}

	for(i = 0; flag_table[i].name; i++)
	{
		if(!(client_p->umodes & flag_table[i].mode))
		{
			if(!isoper && flag_table[i].oper)
				continue;
			rb_sprintf(setflags, "%s %s", setflags, flag_table[i].name);
		}
	}

	if(IsOper(client_p) && IsOperN(client_p))
	{
		if(!(client_p->umodes & UMODE_NCHANGE))
		{
			rb_sprintf(setflags, "%s %s", setflags, "NICKCHANGES");
		}
	}

	return setflags;
}