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/**
 * @file blistnode.h Buddy list node and Counting node API
 * @ingroup core
 */
/* purple
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 */
#ifndef _PURPLE_BLIST_NODE_H_
#define _PURPLE_BLIST_NODE_H_

#include <glib.h>
#include <glib-object.h>

#define PURPLE_TYPE_BLIST_NODE             (purple_blist_node_get_type())
#define PURPLE_BLIST_NODE(obj)             (G_TYPE_CHECK_INSTANCE_CAST((obj), PURPLE_TYPE_BLIST_NODE, PurpleBlistNode))
#define PURPLE_BLIST_NODE_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST((klass), PURPLE_TYPE_BLIST_NODE, PurpleBlistNodeClass))
#define PURPLE_IS_BLIST_NODE(obj)          (G_TYPE_CHECK_INSTANCE_TYPE((obj), PURPLE_TYPE_BLIST_NODE))
#define PURPLE_IS_BLIST_NODE_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass), PURPLE_TYPE_BLIST_NODE))
#define PURPLE_BLIST_NODE_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), PURPLE_TYPE_BLIST_NODE, PurpleBlistNodeClass))

/** @copydoc _PurpleBlistNode */
typedef struct _PurpleBlistNode PurpleBlistNode;
/** @copydoc _PurpleBlistNodeClass */
typedef struct _PurpleBlistNodeClass PurpleBlistNodeClass;

#define PURPLE_TYPE_COUNTING_NODE             (purple_counting_node_get_type())
#define PURPLE_COUNTING_NODE(obj)             (G_TYPE_CHECK_INSTANCE_CAST((obj), PURPLE_TYPE_COUNTING_NODE, PurpleCountingNode))
#define PURPLE_COUNTING_NODE_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST((klass), PURPLE_TYPE_COUNTING_NODE, PurpleCountingNodeClass))
#define PURPLE_IS_COUNTING_NODE(obj)          (G_TYPE_CHECK_INSTANCE_TYPE((obj), PURPLE_TYPE_COUNTING_NODE))
#define PURPLE_IS_COUNTING_NODE_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass), PURPLE_TYPE_COUNTING_NODE))
#define PURPLE_COUNTING_NODE_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), PURPLE_TYPE_COUNTING_NODE, PurpleCountingNodeClass))

/** @copydoc _PurpleCountingNode */
typedef struct _PurpleCountingNode PurpleCountingNode;
/** @copydoc _PurpleCountingNodeClass */
typedef struct _PurpleCountingNodeClass PurpleCountingNodeClass;

/**************************************************************************/
/* Data Structures                                                        */
/**************************************************************************/

/**
 * A Buddy list node.  This can represent a group, a buddy, or anything else.
 * This is a base class for PurpleBuddy, PurpleContact, PurpleGroup, and for
 * anything else that wants to put itself in the buddy list. */
struct _PurpleBlistNode {
	GObject gparent;

	PurpleBlistNode *prev;    /**< The sibling before this buddy. */
	PurpleBlistNode *next;    /**< The sibling after this buddy.  */
	PurpleBlistNode *parent;  /**< The parent of this node        */
	PurpleBlistNode *child;   /**< The child of this node         */

	/** The UI data associated with this node. This is a convenience
	 *  field provided to the UIs -- it is not used by the libpurple core.
	 */
	gpointer ui_data;
};

/** The base class for all #PurpleBlistNode's. */
struct _PurpleBlistNodeClass {
	GObjectClass gparent_class;

	/*< private >*/
	void (*_purple_reserved1)(void);
	void (*_purple_reserved2)(void);
	void (*_purple_reserved3)(void);
	void (*_purple_reserved4)(void);
};

/**
 * A node that keeps count of the number of children that it has. It tracks the
 * total number of children, the number of children corresponding to online
 * accounts, and the number of online children.
 *
 * The two types of counting nodes are:
 * 1. Contact: Keeps track of the number of buddies under it.
 * 2. Group:   Keeps track of the number of chats and contacts under it.
 *
 * @see PurpleContact
 * @see PurpleGroup
 */
struct _PurpleCountingNode {
	/** The blist node that this counting node inherits from */
	PurpleBlistNode node;
};

/** The base class for all #PurpleCountingNode's. */
struct _PurpleCountingNodeClass {
	PurpleBlistNodeClass node_class;

	/*< private >*/
	void (*_purple_reserved1)(void);
	void (*_purple_reserved2)(void);
	void (*_purple_reserved3)(void);
	void (*_purple_reserved4)(void);
};

G_BEGIN_DECLS

/**************************************************************************/
/** @name Buddy list node API                                             */
/**************************************************************************/
/*@{*/

/**
 * Returns the GType for the PurpleBlistNode object.
 */
GType purple_blist_node_get_type(void);

/**
 * Returns the next node of a given node. This function is to be used to iterate
 * over the tree returned by purple_blist_get_buddy_list.
 *
 * @node:		A node.
 * @offline:	Whether to include nodes for offline accounts
 * Returns:	The next node
 * @see purple_blist_node_get_parent
 * @see purple_blist_node_get_first_child
 * @see purple_blist_node_get_sibling_next
 * @see purple_blist_node_get_sibling_prev
 */
PurpleBlistNode *purple_blist_node_next(PurpleBlistNode *node, gboolean offline);

/**
 * Returns the parent node of a given node.
 *
 * @node: A node.
 * Returns:  The parent node.
 *
 * @see purple_blist_node_get_first_child
 * @see purple_blist_node_get_sibling_next
 * @see purple_blist_node_get_sibling_prev
 * @see purple_blist_node_next
 */
PurpleBlistNode *purple_blist_node_get_parent(PurpleBlistNode *node);

/**
 * Returns the the first child node of a given node.
 *
 * @node: A node.
 * Returns:  The child node.
 *
 * @see purple_blist_node_get_parent
 * @see purple_blist_node_get_sibling_next
 * @see purple_blist_node_get_sibling_prev
 * @see purple_blist_node_next
 */
PurpleBlistNode *purple_blist_node_get_first_child(PurpleBlistNode *node);

/**
 * Returns the sibling node of a given node.
 *
 * @node: A node.
 * Returns:  The sibling node.
 *
 * @see purple_blist_node_get_parent
 * @see purple_blist_node_get_first_child
 * @see purple_blist_node_get_sibling_prev
 * @see purple_blist_node_next
 */
PurpleBlistNode *purple_blist_node_get_sibling_next(PurpleBlistNode *node);

/**
 * Returns the previous sibling node of a given node.
 *
 * @node: A node.
 * Returns:  The sibling node.
 *
 * @see purple_blist_node_get_parent
 * @see purple_blist_node_get_first_child
 * @see purple_blist_node_get_sibling_next
 * @see purple_blist_node_next
 */
PurpleBlistNode *purple_blist_node_get_sibling_prev(PurpleBlistNode *node);

/**
 * Returns the UI data of a given node.
 *
 * @node: The node.
 * Returns: The UI data.
 */
gpointer purple_blist_node_get_ui_data(const PurpleBlistNode *node);

/**
 * Sets the UI data of a given node.
 *
 * @node: The node.
 * @ui_data: The UI data.
 */
void purple_blist_node_set_ui_data(PurpleBlistNode *node, gpointer ui_data);

/**
 * Returns a node's settings
 *
 * @node:  The node to from which to get settings
 *
 * Returns: The hash table with the node's settings
 */
GHashTable *purple_blist_node_get_settings(PurpleBlistNode *node);

/**
 * Checks whether a named setting exists for a node in the buddy list
 *
 * @node:  The node to check from which to check settings
 * @key:   The identifier of the data
 *
 * Returns: TRUE if a value exists, or FALSE if there is no setting
 */
gboolean purple_blist_node_has_setting(PurpleBlistNode *node, const char *key);

/**
 * Associates a boolean with a node in the buddy list
 *
 * @node:  The node to associate the data with
 * @key:   The identifier for the data
 * @value: The value to set
 */
void purple_blist_node_set_bool(PurpleBlistNode *node, const char *key, gboolean value);

/**
 * Retrieves a named boolean setting from a node in the buddy list
 *
 * @node:  The node to retrieve the data from
 * @key:   The identifier of the data
 *
 * Returns: The value, or FALSE if there is no setting
 */
gboolean purple_blist_node_get_bool(PurpleBlistNode *node, const char *key);

/**
 * Associates an integer with a node in the buddy list
 *
 * @node:  The node to associate the data with
 * @key:   The identifier for the data
 * @value: The value to set
 */
void purple_blist_node_set_int(PurpleBlistNode *node, const char *key, int value);

/**
 * Retrieves a named integer setting from a node in the buddy list
 *
 * @node:  The node to retrieve the data from
 * @key:   The identifier of the data
 *
 * Returns: The value, or 0 if there is no setting
 */
int purple_blist_node_get_int(PurpleBlistNode *node, const char *key);

/**
 * Associates a string with a node in the buddy list
 *
 * @node:  The node to associate the data with
 * @key:   The identifier for the data
 * @value: The value to set
 */
void purple_blist_node_set_string(PurpleBlistNode *node, const char *key,
		const char *value);

/**
 * Retrieves a named string setting from a node in the buddy list
 *
 * @node:  The node to retrieve the data from
 * @key:   The identifier of the data
 *
 * Returns: The value, or NULL if there is no setting
 */
const char *purple_blist_node_get_string(PurpleBlistNode *node, const char *key);

/**
 * Removes a named setting from a blist node
 *
 * @node:  The node from which to remove the setting
 * @key:   The name of the setting
 */
void purple_blist_node_remove_setting(PurpleBlistNode *node, const char *key);

/**
 * Sets whether the node should be saved with the buddy list or not
 *
 * @node:  The node
 * @transient: TRUE if the node should NOT be saved, FALSE if node should
 *                  be saved
 */
void purple_blist_node_set_transient(PurpleBlistNode *node, gboolean transient);

/**
 * Gets whether the node should be saved with the buddy list or not
 *
 * @node:  The node
 *
 * Returns: TRUE if the node should NOT be saved, FALSE if node should be saved
 */
gboolean purple_blist_node_is_transient(PurpleBlistNode *node);

/*@}*/

/**
 * Retrieves the extended menu items for a buddy list node.
 * @n: The blist node for which to obtain the extended menu items.
 * Returns:  A list of PurpleMenuAction items, as harvested by the
 *          blist-node-extended-menu signal.
 */
GList *purple_blist_node_get_extended_menu(PurpleBlistNode *n);

/*@}*/

/**************************************************************************/
/** @name Counting node API                                               */
/**************************************************************************/
/*@{*/

/**
 * Returns the GType for the PurpleCountingNode object.
 */
GType purple_counting_node_get_type(void);

/**
 * Returns the total number of children of the counting node.
 *
 * @counter:  The node
 *
 * Returns:  The total number of children of the node
 */
int purple_counting_node_get_total_size(PurpleCountingNode *counter);

/**
 * Returns the number of children of the counting node corresponding to online
 * accounts.
 *
 * @counter:  The node
 *
 * Returns:  The number of children with online accounts
 */
int purple_counting_node_get_current_size(PurpleCountingNode *counter);

/**
 * Returns the number of children of the counting node that are online.
 *
 * @counter:  The node
 *
 * Returns:  The total number of online children
 */
int purple_counting_node_get_online_count(PurpleCountingNode *counter);

/**
 * Changes the total number of children of the counting node. The provided
 * delta value is added to the count, or if it's negative, the count is
 * decreased.
 *
 * @counter:  The node
 * @delta:    The value to change the total size by
 */
void purple_counting_node_change_total_size(PurpleCountingNode *counter, int delta);

/**
 * Changes the number of children of the counting node corresponding to online
 * accounts. The provided delta value is added to the count, or if it's
 * negative, the count is decreased.
 *
 * @counter:  The node
 * @delta:    The value to change the current size by
 */
void purple_counting_node_change_current_size(PurpleCountingNode *counter, int delta);

/**
 * Changes the number of children of the counting node that are online. The
 * provided delta value is added to the count, or if it's negative, the count is
 * decreased.
 *
 * @counter:  The node
 * @delta:    The value to change the online count by
 */
void purple_counting_node_change_online_count(PurpleCountingNode *counter, int delta);

/**
 * Sets the total number of children of the counting node.
 *
 * @counter:    The node
 * @totalsize:  The total number of children of the node
 */
void purple_counting_node_set_total_size(PurpleCountingNode *counter, int totalsize);

/**
 * Sets the number of children of the counting node corresponding to online
 * accounts.
 *
 * @counter:      The node
 * @currentsize:  The number of children with online accounts
 */
void purple_counting_node_set_current_size(PurpleCountingNode *counter, int currentsize);

/**
 * Sets the number of children of the counting node that are online.
 *
 * @counter:      The node
 * @onlinecount:  The total number of online children
 */
void purple_counting_node_set_online_count(PurpleCountingNode *counter, int onlinecount);

/*@}*/

G_END_DECLS

#endif /* _PURPLE_BLIST_NODE_H_ */