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  /********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2010 Wilmer van der Gaast and others                *
  \********************************************************************/

/* Stuff to handle, save and search buddies                             */

/*
  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 with
  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef __BEE_H__
#define __BEE_H__

struct bee_ui_funcs;
struct groupchat;

typedef struct bee
{
	/* Settings. See set.h for how these work. The UI can add its
	   own settings here. */
	struct set *set;
	
	GSList *users;  /* struct bee_user */
	GSList *groups; /* struct bee_group */
	struct account *accounts; /* TODO(wilmer): Use GSList here too? */
	
	/* Symbolic, to refer to the local user (who has no real bee_user
	   object). Not to be used by anything except so far imcb_chat_add/
	   remove_buddy(). */
	struct bee_user *user;
	
	/* Fill in the callbacks for events you care about. */
	const struct bee_ui_funcs *ui;
	
	/* And this one will be passed to every callback for any state the
	   UI may want to keep. */
	void *ui_data;
} bee_t;

bee_t *bee_new();
void bee_free( bee_t *b );

typedef enum
{
	BEE_USER_ONLINE = 1,    /* Compatibility with old OPT_LOGGED_IN flag */
	BEE_USER_AWAY = 4,      /* Compatibility with old OPT_AWAY flag */
	BEE_USER_LOCAL = 256,   /* Locally-added contacts (not in real contact list) */
} bee_user_flags_t;

typedef struct bee_user
{
	struct im_connection *ic;
	char *handle;
	char *fullname;
	char *nick;
	struct bee_group *group;

	bee_user_flags_t flags;
	char *status;     /* NULL means available, anything else is an away state. */
	char *status_msg; /* Status and/or away message. */
	
	/* Set using imcb_buddy_times(). */
	time_t login_time, idle_time;
	
	bee_t *bee;
	void *ui_data;
	void *data; /* Can be used by the IM module. */
} bee_user_t;

/* This one's mostly used so save space and make it easier (cheaper) to
   compare groups of contacts, etc. */
typedef struct bee_group
{
	char *key;  /* Lower case version of the name. */
	char *name;
} bee_group_t;

typedef struct bee_ui_funcs
{
	void (*imc_connected)( struct im_connection *ic );
	void (*imc_disconnected)( struct im_connection *ic );
	
	gboolean (*user_new)( bee_t *bee, struct bee_user *bu );
	gboolean (*user_free)( bee_t *bee, struct bee_user *bu );
	/* Set the fullname first, then call this one to notify the UI. */
	gboolean (*user_fullname)( bee_t *bee, bee_user_t *bu );
	gboolean (*user_nick_hint)( bee_t *bee, bee_user_t *bu, const char *hint );
	/* Notify the UI when an existing user is moved between groups. */
	gboolean (*user_group)( bee_t *bee, bee_user_t *bu );
	/* State info is already updated, old is provided in case the UI needs a diff. */
	gboolean (*user_status)( bee_t *bee, struct bee_user *bu, struct bee_user *old );
	/* On every incoming message. sent_at = 0 means unknown. */
	gboolean (*user_msg)( bee_t *bee, bee_user_t *bu, const char *msg, time_t sent_at );
	/* Flags currently defined (OPT_TYPING/THINKING) in nogaim.h. */
	gboolean (*user_typing)( bee_t *bee, bee_user_t *bu, guint32 flags );
	
	/* Called at creation time. Don't show to the user until s/he is
	   added using chat_add_user().  UI state can be stored via c->data. */
	gboolean (*chat_new)( bee_t *bee, struct groupchat *c );
	gboolean (*chat_free)( bee_t *bee, struct groupchat *c );
	/* System messages of any kind. */
	gboolean (*chat_log)( bee_t *bee, struct groupchat *c, const char *text );
	gboolean (*chat_msg)( bee_t *bee, struct groupchat *c, bee_user_t *bu, const char *msg, time_t sent_at );
	gboolean (*chat_add_user)( bee_t *bee, struct groupchat *c, bee_user_t *bu );
	gboolean (*chat_remove_user)( bee_t *bee, struct groupchat *c, bee_user_t *bu );
	gboolean (*chat_topic)( bee_t *bee, struct groupchat *c, const char *new, bee_user_t *bu );
	gboolean (*chat_name_hint)( bee_t *bee, struct groupchat *c, const char *name );
	
	struct file_transfer* (*ft_in_start)( bee_t *bee, bee_user_t *bu, const char *file_name, size_t file_size );
	gboolean (*ft_out_start)( struct im_connection *ic, struct file_transfer *ft );
	void (*ft_close)( struct im_connection *ic, struct file_transfer *ft );
	void (*ft_finished)( struct im_connection *ic, struct file_transfer *ft );
} bee_ui_funcs_t;


/* bee.c */
bee_t *bee_new();
void bee_free( bee_t *b );

/* bee_user.c */
bee_user_t *bee_user_new( bee_t *bee, struct im_connection *ic, const char *handle, bee_user_flags_t flags );
int bee_user_free( bee_t *bee, bee_user_t *bu );
bee_user_t *bee_user_by_handle( bee_t *bee, struct im_connection *ic, const char *handle );
int bee_user_msg( bee_t *bee, bee_user_t *bu, const char *msg, int flags );
bee_group_t *bee_group_by_name( bee_t *bee, const char *name, gboolean creat );
void bee_group_free( bee_t *bee );

/* Callbacks from IM modules to core: */
/* Buddy activity */
/* To manipulate the status of a handle.
 * - flags can be |='d with OPT_* constants. You will need at least:
 *   OPT_LOGGED_IN and OPT_AWAY.
 * - 'state' and 'message' can be NULL */
G_MODULE_EXPORT void imcb_buddy_status( struct im_connection *ic, const char *handle, int flags, const char *state, const char *message );
G_MODULE_EXPORT void imcb_buddy_times( struct im_connection *ic, const char *handle, time_t login, time_t idle );
/* Call when a handle says something. 'flags' and 'sent_at may be just 0. */
G_MODULE_EXPORT void imcb_buddy_msg( struct im_connection *ic, const char *handle, char *msg, guint32 flags, time_t sent_at );

/* bee_chat.c */
/* These two functions are to create a group chat.
 * - imcb_chat_new(): the 'handle' parameter identifies the chat, like the
 *   channel name on IRC.
 * - After you have a groupchat pointer, you should add the handles, finally  
 *   the user her/himself. At that point the group chat will be visible to the
 *   user, too. */
G_MODULE_EXPORT struct groupchat *imcb_chat_new( struct im_connection *ic, const char *handle );
G_MODULE_EXPORT void imcb_chat_name_hint( struct groupchat *c, const char *name );
G_MODULE_EXPORT void imcb_chat_free( struct groupchat *c );
/* To tell BitlBee 'who' said 'msg' in 'c'. 'flags' and 'sent_at' can be 0. */
G_MODULE_EXPORT void imcb_chat_msg( struct groupchat *c, const char *who, char *msg, guint32 flags, time_t sent_at );
/* System messages specific to a groupchat, so they can be displayed in the right context. */
G_MODULE_EXPORT void imcb_chat_log( struct groupchat *c, char *format, ... );
/* To tell BitlBee 'who' changed the topic of 'c' to 'topic'. */
G_MODULE_EXPORT void imcb_chat_topic( struct groupchat *c, char *who, char *topic, time_t set_at );
G_MODULE_EXPORT void imcb_chat_add_buddy( struct groupchat *c, const char *handle );
/* To remove a handle from a group chat. Reason can be NULL. */
G_MODULE_EXPORT void imcb_chat_remove_buddy( struct groupchat *c, const char *handle, const char *reason );
G_MODULE_EXPORT int bee_chat_msg( bee_t *bee, struct groupchat *c, const char *msg, int flags );
G_MODULE_EXPORT struct groupchat *bee_chat_by_title( bee_t *bee, struct im_connection *ic, const char *title );

#endif /* __BEE_H__ */