/*
 * IRC protocol Implementation
 *
 * Copyright (C) 2008, Siddhesh Poyarekar and the Ayttm Team
 *
 * Some code Copyright (C) 2001, Erik Inge Bolso <knan@mo.himolde.no>
 *                     and others
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef _LIB_IRC_H_
#define _LIB_IRC_H_

#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

#include "intl.h"

#ifdef __MINGW32__
#define __IN_PLUGIN__ 1
#include <winsock2.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif

/* RFC1459 and RFC2812 defines max message size
   including \n == 512 bytes, but being tolerant of
   violations is nice nevertheless. */
#define BUF_LEN 512*2

enum {
	IRC_NOECHO = 1,
	IRC_ECHO_ACTION,
	IRC_ECHO_KICK
};

/* from util.c :
 *
 * The last state in the list of states will be the OFFLINE state
 * The first state in the list will be the ONLINE states
 * The rest of the states are the various AWAY states
 */

enum {
	IRC_ONLINE = 0,
	IRC_AWAY,
	IRC_INVISIBLE,
	IRC_OFFLINE,
	IRC_STATE_COUNT
};

enum {
	IRC_SIGNON_ONLINE = 0,
	IRC_SIGNON_INVISIBLE = 8
};

/* User modes */
enum {
	IRC_USER_MODE_AWAY = 1,
	IRC_USER_MODE_INVISIBLE = 1 << 1,
	IRC_USER_MODE_RECEIVE_WALLOPS = 1 << 2,
	IRC_USER_MODE_RESTRICT_USER_CONNECTION = 1 << 3,
	IRC_USER_MODE_OPER = 1 << 4,
	IRC_USER_MODE_LOCAL_OPER = 1 << 5,
	IRC_USER_MODE_RECEIVE_SERVER_NOTICES = 1 << 6
};

/* Message Prefix */
typedef struct {
	char *nick;
	char *servername;
	char *user;
	char *hostname;
} irc_message_prefix;

/* Parameter List element */
typedef struct _irc_param_list {
	char *param;
	struct _irc_param_list *next;
} irc_param_list;

struct _irc_callbacks;

typedef struct {
	char connect_address[255];
	char port[16];
	char *nick;
	char *servername;
	char *hostname;
	char *user;
	int fd;

	int status;
	char *usermodes;
	char *channelmodes;

	struct _irc_callbacks *callbacks;

	/* Store partial messages in this */
	char buf[BUF_LEN];
	int len;

	void *data;
} irc_account;

typedef struct _namelist {
	char *name;
	char attribute;
	struct _namelist *next;
} irc_name_list;

typedef struct _irc_callbacks {

	void (*incoming_notice) (const char *to,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*buddy_quit) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*buddy_join) (const char *channel,
		irc_message_prefix *prefix, irc_account *ia);

	void (*buddy_part) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_invite) (const char *to,
		const char *channel,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_kick) (const char *to,
		const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*nick_change) (const char *newnick,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_privmsg) (const char *recipient,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_ping) (const char *server, irc_account *ia);

	void (*got_welcome) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_yourhost) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_created) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_myinfo) (const char *servername,
		const char *version,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_channel_list) (const char *me,
		const char *channel,
		int users,
		const char *topic, irc_message_prefix *prefix, irc_account *ia);

	void (*got_channel_listend) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_away) (const char *from,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_unaway) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_nowaway) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_ison) (const char *userlist,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_whoisidle) (const char *from,
		int since,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_whoisuser) (const char *nick,
		const char *user,
		const char *host,
		const char *real_name,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_whoisserver) (const char *nick,
		const char *server,
		const char *info, irc_message_prefix *prefix, irc_account *ia);

	void (*got_whoisop) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_whowasuser) (const char *nick,
		const char *user,
		const char *host,
		const char *real_name,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_endofwhois) (const char *nicks,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_endofwhowas) (const char *nicks,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_notopic) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_topic) (const char *channel,
		const char *topic, irc_message_prefix *prefix, irc_account *ia);

	void (*got_topicsetby) (const char *channel,
		const char *nickname,
		const char *time, irc_message_prefix *prefix, irc_account *ia);

	void (*inviting) (const char *channel,
		const char *nick, irc_message_prefix *prefix, irc_account *ia);

	void (*summoning) (const char *user,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_version) (const char *version,
		const char *debuglevel,
		const char *server,
		const char *comments,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_info) (const char *info,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_endinfo) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*motd_start) (const char *server,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_motd) (const char *motd,
		irc_message_prefix *prefix, irc_account *ia);

	void (*endofmotd) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_endofwho) (const char *name,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_endofnames) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*youreoper) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_namelist) (irc_name_list *list,
		const char *channel,
		irc_message_prefix *prefix, irc_account *ia);

	void (*got_time) (const char *time,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_send_data) (void *buf, int len, irc_account *ia);

	void (*irc_error) (const char *message, void *data);

	void (*irc_warning) (const char *message, void *data);

	void (*client_quit) (irc_account *ia);

	/* ERROR HANDLERS */

	void (*irc_no_such_nick) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_such_server) (const char *server,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_such_channel) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_cant_sendto_chnl) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_was_no_such_nick) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_too_many_chnl) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_too_many_targets) (const char *target,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_origin) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_recipient) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_text_to_send) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_toplevel) (const char *mask,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_wild_toplevel) (const char *mask,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_unknown_cmd) (const char *command,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_motd) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_admininfo) (const char *server,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_file_error) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_nick_given) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_erroneous_nick) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_nick_in_use) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_nick_collision) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_user_not_in_chnl) (const char *nick,
		const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_not_on_chnl) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_on_chnl) (const char *user,
		const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_nologin) (const char *nick,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_summon_disabled) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_user_disabled) (const char *user_disabled,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_not_registered) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_need_more_params) (const char *cmd,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_already_registered) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_perm_for_host) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_password_mismatch) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_banned) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_chnl_key_set) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_channel_full) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_unknown_mode) (const char *mode,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_invite_only) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_banned_from_chnl) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_bad_chnl_key) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_privileges) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_chnlop_privs_needed) (const char *channel,
		const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_cant_kill_server) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_no_o_per_host) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_mode_unknown) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

	void (*irc_user_dont_match) (const char *message,
		irc_message_prefix *prefix, irc_account *ia);

} irc_callbacks;

void irc_message_parse(char *incoming, irc_account *ia);

/* Local prototypes */

void irc_login(const char *password, int mode, irc_account *ia);
void irc_logout(irc_account *ia);

int irc_send_privmsg(const char *recipient, char *message, irc_account *ia);
void irc_send_notice(const char *recipient, char *message, irc_account *ia);

void irc_send_whois(const char *target, const char *mask, irc_account *ia);

void irc_get_names_list(const char *channel, irc_account *ia);

void irc_process_privmsg(const char *to, const char *message,
	irc_message_prefix *prefix, irc_account *ia);
void irc_process_notice(const char *to, const char *message,
	irc_message_prefix *prefix, irc_account *ia);

void irc_set_away(char *message, irc_account *ia);
void irc_set_mode(int irc_mode, irc_account *ia);
void irc_unset_mode(int irc_mode, irc_account *ia);
void irc_join(const char *room, irc_account *ia);
void irc_leave_chat_room(const char *room, irc_account *ia);
void irc_send_invite(const char *user, const char *room,
	const char *message, irc_account *ia);
void irc_send_pong(const char *servername, irc_account *ia);

/* Add and return the new head of list */
irc_param_list *irc_param_list_add(irc_param_list *param_list,
	const char *param);
char *irc_param_list_get_at(irc_param_list *param_list, int position);

/* Get the parameter at */
char *irc_param_list_get_at(irc_param_list *list, int offset);

void irc_param_list_free(irc_param_list *param_list);

irc_name_list *irc_gen_name_list(char *message);

int irc_recv(irc_account *ia, char *buf, int len);

int irc_get_command_string(char *out, const char *recipient, char *command,
	char *params, irc_account *ia);

void irc_request_list(const char *channel, const char *target, irc_account *ia);

#endif