/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *		Jon Trowbridge <trow@ximian.com>
 *      Chris Toshok <toshok@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>
#include <ctype.h>
#include <string.h>
#include "addressbook/util/addressbook.h"
#include "addressbook/util/eab-book-util.h"
#include "eab-contact-compare.h"

/* This is an "optimistic" combiner: the best of the two outcomes is
   selected. */
static EABContactMatchType
combine_comparisons (EABContactMatchType prev,
		     EABContactMatchType new_info)
{
	if (new_info == EAB_CONTACT_MATCH_NOT_APPLICABLE)
		return prev;
	return (EABContactMatchType) MAX ((gint) prev, (gint) new_info);
}

/*** Name comparisons ***/

/* This *so* doesn't belong here... at least not implemented in a
   sucky way like this.  But it can be fixed later. */

/* This is very Anglocentric. */
static const gchar *name_synonyms[][2] = {
	{ "jon", "john" },   /* Ah, the hacker's perogative */
	{ "joseph", "joe" },
	{ "robert", "bob" },
	{ "gene", "jean" },
	{ "jesse", "jessie" },
	{ "ian", "iain" },
	{ "richard", "dick" },
	{ "william", "bill" },
	{ "william", "will" },
	{ "anthony", "tony" },
	{ "michael", "mike" },
	{ "eric", "erik" },
	{ "elizabeth", "liz" },
	{ "jeff", "geoff" },
	{ "jeff", "geoffrey" },
	{ "tom", "thomas" },
	{ "dave", "david" },
	{ "jim", "james" },
	{ "abigal", "abby" },
	{ "amanda", "amy" },
	{ "amanda", "manda" },
	{ "jennifer", "jenny" },
	{ "christopher", "chris" },
	{ "rebecca", "becca" },
	{ "rebecca", "becky" },
	{ "anderson", "andersen" },
	{ "johnson", "johnsen" },
	/* We could go on and on... */
	/* We should add soundex here. */
	{ NULL, NULL }
};

static gboolean
name_fragment_match_with_synonyms (const gchar *a, const gchar *b, gboolean strict)
{
	gint i;

	if (!(a && b && *a && *b))
		return FALSE;

	if (!e_utf8_casefold_collate (a, b))
		return TRUE;

	/* Check for nicknames.  Yes, the linear search blows. */
	for (i=0; name_synonyms[i][0]; ++i) {

		if (!e_utf8_casefold_collate (name_synonyms[i][0], a)
		    && !e_utf8_casefold_collate (name_synonyms[i][1], b))
			return TRUE;

		if (!e_utf8_casefold_collate (name_synonyms[i][0], b)
		    && !e_utf8_casefold_collate (name_synonyms[i][1], a))
			return TRUE;
	}

	return FALSE;
}

EABContactMatchType
eab_contact_compare_name_to_string (EContact *contact, const gchar *str)
{
	return eab_contact_compare_name_to_string_full (contact, str, FALSE, NULL, NULL, NULL);
}

EABContactMatchType
eab_contact_compare_name_to_string_full (EContact *contact, const gchar *str, gboolean allow_partial_matches,
					 gint *matched_parts_out, EABContactMatchPart *first_matched_part_out, gint *matched_character_count_out)
{
	gchar **namev, **givenv = NULL, **addv = NULL, **familyv = NULL;

	gint matched_parts = EAB_CONTACT_MATCH_PART_NONE;
	EABContactMatchPart first_matched_part = EAB_CONTACT_MATCH_PART_NONE;
	EABContactMatchPart this_part_match = EAB_CONTACT_MATCH_PART_NOT_APPLICABLE;
	EABContactMatchType match_type;
	EContactName *contact_name;

	gint match_count = 0, matched_character_count = 0, fragment_count;
	gint i, j;
	gchar *str_cpy, *s;

	g_return_val_if_fail (E_IS_CONTACT (contact), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	if (!e_contact_get_const (contact, E_CONTACT_FULL_NAME))
		return EAB_CONTACT_MATCH_NOT_APPLICABLE;
	if (str == NULL)
		return EAB_CONTACT_MATCH_NOT_APPLICABLE;

	str_cpy = s = g_strdup (str);
	while (*s) {
		if (*s == ',' || *s == '"')
			*s = ' ';
		++s;
	}
	namev   = g_strsplit (str_cpy, " ", 0);
	g_free (str_cpy);

	contact_name = e_contact_get (contact, E_CONTACT_NAME);

	if (contact_name->given)
		givenv = g_strsplit (contact_name->given, " ", 0);
	if (contact_name->additional)
		addv = g_strsplit (contact_name->additional, " ", 0);
	if (contact_name->family)
		familyv = g_strsplit (contact_name->family, " ", 0);

	e_contact_name_free (contact_name);

	fragment_count = 0;
	for (i = 0; givenv && givenv[i]; ++i)
		++fragment_count;
	for (i = 0; addv && addv[i]; ++i)
		++fragment_count;
	for (i = 0; familyv && familyv[i]; ++i)
		++fragment_count;

	for (i = 0; namev[i] && this_part_match != EAB_CONTACT_MATCH_PART_NONE; ++i) {

		if (*namev[i]) {

			this_part_match = EAB_CONTACT_MATCH_PART_NONE;

			/* When we are allowing partials, we are strict about the matches we allow.
			   Does this make sense?  Not really, but it does the right thing for the purposes
			   of completion. */

			if (givenv && this_part_match == EAB_CONTACT_MATCH_PART_NONE) {
				for (j = 0; givenv[j]; ++j) {
					if (name_fragment_match_with_synonyms (givenv[j], namev[i], allow_partial_matches)) {

						this_part_match = EAB_CONTACT_MATCH_PART_GIVEN_NAME;

						/* We remove a piece of a name once it has been matched against, so
						   that "john john" won't match "john doe". */
						g_free (givenv[j]);
						givenv[j] = g_strdup ("");
						break;
					}
				}
			}

			if (addv && this_part_match == EAB_CONTACT_MATCH_PART_NONE) {
				for (j = 0; addv[j]; ++j) {
					if (name_fragment_match_with_synonyms (addv[j], namev[i], allow_partial_matches)) {

						this_part_match = EAB_CONTACT_MATCH_PART_ADDITIONAL_NAME;

						g_free (addv[j]);
						addv[j] = g_strdup ("");
						break;
					}
				}
			}

			if (familyv && this_part_match == EAB_CONTACT_MATCH_PART_NONE) {
				for (j = 0; familyv[j]; ++j) {
					if (allow_partial_matches ? name_fragment_match_with_synonyms (familyv[j], namev[i], allow_partial_matches)
					    : !e_utf8_casefold_collate (familyv[j], namev[i])) {

						this_part_match = EAB_CONTACT_MATCH_PART_FAMILY_NAME;

						g_free (familyv[j]);
						familyv[j] = g_strdup ("");
						break;
					}
				}
			}

			if (this_part_match != EAB_CONTACT_MATCH_PART_NONE) {
				++match_count;
				matched_character_count += g_utf8_strlen (namev[i], -1);
				matched_parts |= this_part_match;
				if (first_matched_part == EAB_CONTACT_MATCH_PART_NONE)
					first_matched_part = this_part_match;
			}
		}
	}

	match_type = EAB_CONTACT_MATCH_NONE;

	if (this_part_match != EAB_CONTACT_MATCH_PART_NONE) {

		if (match_count > 0)
			match_type = EAB_CONTACT_MATCH_VAGUE;

		if (fragment_count == match_count) {

			match_type = EAB_CONTACT_MATCH_EXACT;

		} else if (fragment_count == match_count + 1) {

			match_type = EAB_CONTACT_MATCH_PARTIAL;

		}
	}

	if (matched_parts_out)
		*matched_parts_out = matched_parts;
	if (first_matched_part_out)
		*first_matched_part_out = first_matched_part;
	if (matched_character_count_out)
		*matched_character_count_out = matched_character_count;

	g_strfreev (namev);
	g_strfreev (givenv);
	g_strfreev (addv);
	g_strfreev (familyv);

	return match_type;
}

EABContactMatchType
eab_contact_compare_file_as (EContact *contact1, EContact *contact2)
{
	EABContactMatchType match_type;
	gchar *a, *b;

	g_return_val_if_fail (E_IS_CONTACT (contact1), EAB_CONTACT_MATCH_NOT_APPLICABLE);
	g_return_val_if_fail (E_IS_CONTACT (contact2), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	a = e_contact_get (contact1, E_CONTACT_FILE_AS);
	b = e_contact_get (contact2, E_CONTACT_FILE_AS);

	if (a == NULL || b == NULL) {
		g_free (a);
		g_free (b);
		return EAB_CONTACT_MATCH_NOT_APPLICABLE;
	}

	if (!strcmp (a, b))
		match_type = EAB_CONTACT_MATCH_EXACT;
	else if (g_utf8_validate (a, -1, NULL) && g_utf8_validate (b, -1, NULL) &&
		 !g_utf8_collate (a, b))
		match_type = EAB_CONTACT_MATCH_PARTIAL;
	else
		match_type = EAB_CONTACT_MATCH_NONE;

	g_free (a);
	g_free (b);
	return match_type;
}

EABContactMatchType
eab_contact_compare_name (EContact *contact1, EContact *contact2)
{
	EContactName *a, *b;
	gint matches=0, possible=0;
	gboolean family_match = FALSE;

	g_return_val_if_fail (E_IS_CONTACT (contact1), EAB_CONTACT_MATCH_NOT_APPLICABLE);
	g_return_val_if_fail (E_IS_CONTACT (contact2), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	a = e_contact_get (contact1, E_CONTACT_NAME);
	b = e_contact_get (contact2, E_CONTACT_NAME);

	if (a == NULL || b == NULL) {
		g_free (a);
		g_free (b);
		return EAB_CONTACT_MATCH_NOT_APPLICABLE;
	}

	if (a->given && b->given && *a->given && *b->given) {
		++possible;
		if (name_fragment_match_with_synonyms (a->given, b->given, FALSE /* both inputs are complete */)) {
			++matches;
		}
	}

	if (a->additional && b->additional && *a->additional && *b->additional) {
		++possible;
		if (name_fragment_match_with_synonyms (a->additional, b->additional, FALSE /* both inputs are complete */)) {
			++matches;
		}
	}

	if (a->family && b->family && *a->family && *b->family) {
		++possible;
		/* We don't allow "loose matching" (i.e. John vs. Jon) on family names */
		if (!e_utf8_casefold_collate (a->family, b->family)) {
			++matches;
			family_match = TRUE;
		}
	}

	e_contact_name_free (a);
	e_contact_name_free (b);

	/* Now look at the # of matches and try to intelligently map
	   an EAB_CONTACT_MATCH_* type to it.  Special consideration is given
	   to family-name matches. */

	if (possible == 0)
		return EAB_CONTACT_MATCH_NOT_APPLICABLE;

	if (possible == 1)
		return family_match ? EAB_CONTACT_MATCH_VAGUE : EAB_CONTACT_MATCH_NONE;

	if (possible == matches)
		return family_match ? EAB_CONTACT_MATCH_EXACT : EAB_CONTACT_MATCH_PARTIAL;

	if (possible == matches+1)
		return family_match ? EAB_CONTACT_MATCH_VAGUE : EAB_CONTACT_MATCH_NONE;

	return EAB_CONTACT_MATCH_NONE;
}

/*** Nickname Comparisons ***/

EABContactMatchType
eab_contact_compare_nickname (EContact *contact1, EContact *contact2)
{
	g_return_val_if_fail (contact1 && E_IS_CONTACT (contact1), EAB_CONTACT_MATCH_NOT_APPLICABLE);
	g_return_val_if_fail (contact2 && E_IS_CONTACT (contact2), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	return EAB_CONTACT_MATCH_NOT_APPLICABLE;
}

/*** E-mail Comparisons ***/

static gboolean
match_email_username (const gchar *addr1, const gchar *addr2)
{
	gint c1, c2;
	if (addr1 == NULL || addr2 == NULL)
		return FALSE;

	while (*addr1 && *addr2 && *addr1 != '@' && *addr2 != '@') {
		c1 = isupper (*addr1) ? tolower (*addr1) : *addr1;
		c2 = isupper (*addr2) ? tolower (*addr2) : *addr2;
		if (c1 != c2)
			return FALSE;
		++addr1;
		++addr2;
	}

	return *addr1 == *addr2;
}

static gboolean
match_email_hostname (const gchar *addr1, const gchar *addr2)
{
	gint c1, c2;
	gboolean seen_at1, seen_at2;
	if (addr1 == NULL || addr2 == NULL)
		return FALSE;

	/* Walk to the end of each string. */
	seen_at1 = FALSE;
	if (*addr1) {
		while (*addr1) {
			if (*addr1 == '@')
				seen_at1 = TRUE;
			++addr1;
		}
		--addr1;
	}

	seen_at2 = FALSE;
	if (*addr2) {
		while (*addr2) {
			if (*addr2 == '@')
				seen_at2 = TRUE;
			++addr2;
		}
		--addr2;
	}

	if (!seen_at1 && !seen_at2)
		return TRUE;
	if (!seen_at1 || !seen_at2)
		return FALSE;

	while (*addr1 != '@' && *addr2 != '@') {
		c1 = isupper (*addr1) ? tolower (*addr1) : *addr1;
		c2 = isupper (*addr2) ? tolower (*addr2) : *addr2;
		if (c1 != c2)
			return FALSE;
		--addr1;
		--addr2;
	}
	if ((*addr1 == '@' && *addr2 != '@' ) || (*addr2 == '@' && *addr1 != '@'))
	       return FALSE;

	return TRUE;
}

static EABContactMatchType
compare_email_addresses (const gchar *addr1, const gchar *addr2)
{
	if (addr1 == NULL || *addr1 == 0 ||
	    addr2 == NULL || *addr2 == 0)
		return EAB_CONTACT_MATCH_NOT_APPLICABLE;

	if (match_email_username (addr1, addr2))
		return match_email_hostname (addr1, addr2) ? EAB_CONTACT_MATCH_EXACT : EAB_CONTACT_MATCH_VAGUE;

	return EAB_CONTACT_MATCH_NONE;
}

EABContactMatchType
eab_contact_compare_email (EContact *contact1, EContact *contact2)
{
	EABContactMatchType match = EAB_CONTACT_MATCH_NOT_APPLICABLE;
	GList *contact1_email, *contact2_email;
	GList *i1, *i2;

	g_return_val_if_fail (contact1 && E_IS_CONTACT (contact1), EAB_CONTACT_MATCH_NOT_APPLICABLE);
	g_return_val_if_fail (contact2 && E_IS_CONTACT (contact2), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	contact1_email = e_contact_get (contact1, E_CONTACT_EMAIL);
	contact2_email = e_contact_get (contact2, E_CONTACT_EMAIL);

	if (contact1_email == NULL || contact2_email == NULL) {
		g_list_foreach (contact1_email, (GFunc)g_free, NULL);
		g_list_free (contact1_email);

		g_list_foreach (contact2_email, (GFunc)g_free, NULL);
		g_list_free (contact2_email);
		return EAB_CONTACT_MATCH_NOT_APPLICABLE;
	}

	i1 = contact1_email;

	/* Do pairwise-comparisons on all of the e-mail addresses.  If
	   we find an exact match, there is no reason to keep
	   checking. */
	while (i1 && match != EAB_CONTACT_MATCH_EXACT) {
		gchar *addr1 = (gchar *) i1->data;

		i2 = contact2_email;
		while (i2 && match != EAB_CONTACT_MATCH_EXACT) {
			gchar *addr2 = (gchar *) i2->data;

			match = combine_comparisons (match, compare_email_addresses (addr1, addr2));

			i2 = i2->next;
		}

		i1 = i1->next;
	}

	g_list_foreach (contact1_email, (GFunc)g_free, NULL);
	g_list_free (contact1_email);

	g_list_foreach (contact2_email, (GFunc)g_free, NULL);
	g_list_free (contact2_email);

	return match;
}

EABContactMatchType
eab_contact_compare_address (EContact *contact1, EContact *contact2)
{
	g_return_val_if_fail (contact1 && E_IS_CONTACT (contact1), EAB_CONTACT_MATCH_NOT_APPLICABLE);
	g_return_val_if_fail (contact2 && E_IS_CONTACT (contact2), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	/* Unimplemented */

	return EAB_CONTACT_MATCH_NOT_APPLICABLE;
}

EABContactMatchType
eab_contact_compare_telephone (EContact *contact1, EContact *contact2)
{
	g_return_val_if_fail (contact1 && E_IS_CONTACT (contact1), EAB_CONTACT_MATCH_NOT_APPLICABLE);
	g_return_val_if_fail (contact2 && E_IS_CONTACT (contact2), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	/* Unimplemented */

	return EAB_CONTACT_MATCH_NOT_APPLICABLE;
}

EABContactMatchType
eab_contact_compare (EContact *contact1, EContact *contact2)
{
	EABContactMatchType result;

	g_return_val_if_fail (contact1 && E_IS_CONTACT (contact1), EAB_CONTACT_MATCH_NOT_APPLICABLE);
	g_return_val_if_fail (contact2 && E_IS_CONTACT (contact2), EAB_CONTACT_MATCH_NOT_APPLICABLE);

	result = EAB_CONTACT_MATCH_NONE;
	if (!e_contact_get (contact1, E_CONTACT_IS_LIST)) {
		result = combine_comparisons (result, eab_contact_compare_name      (contact1, contact2));
		result = combine_comparisons (result, eab_contact_compare_nickname  (contact1, contact2));
		if (!e_contact_get (contact2, E_CONTACT_IS_LIST))
			result = combine_comparisons (result, eab_contact_compare_email (contact1, contact2));
		result = combine_comparisons (result, eab_contact_compare_address   (contact1, contact2));
		result = combine_comparisons (result, eab_contact_compare_telephone (contact1, contact2));
	}
	result = combine_comparisons (result, eab_contact_compare_file_as   (contact1, contact2));

	return result;
}

typedef struct _MatchSearchInfo MatchSearchInfo;
struct _MatchSearchInfo {
	EContact *contact;
	GList *avoid;
	EABContactMatchQueryCallback cb;
	gpointer closure;
};

static void
match_search_info_free (MatchSearchInfo *info)
{
	if (info) {
		g_object_unref (info->contact);

		/* This should already have been deallocated, but just in case... */
		if (info->avoid) {
			g_list_foreach (info->avoid, (GFunc) g_object_unref, NULL);
			g_list_free (info->avoid);
			info->avoid = NULL;
		}

		g_free (info);
	}
}

static void
query_cb (EBook *book, EBookStatus status, GList *contacts, gpointer closure)
{
	/* XXX we need to free contacts */
	MatchSearchInfo *info = (MatchSearchInfo *) closure;
	EABContactMatchType best_match = EAB_CONTACT_MATCH_NONE;
	EContact *best_contact = NULL;
	GList *remaining_contacts = NULL;
	const GList *i;

	if (status != E_BOOK_ERROR_OK) {
		info->cb (info->contact, NULL, EAB_CONTACT_MATCH_NONE, info->closure);
		match_search_info_free (info);
		return;
	}

	/* remove the contacts we're to avoid from the list, if they're present */
	for (i = contacts; i != NULL; i = g_list_next (i)) {
		EContact *this_contact = E_CONTACT (i->data);
		const gchar *this_uid;
		GList *iterator;
		gboolean avoid = FALSE;

		this_uid = e_contact_get_const (this_contact, E_CONTACT_UID);
		if (!this_uid)
			continue;

		for (iterator = info->avoid; iterator; iterator = iterator->next) {
			const gchar *avoid_uid;

			avoid_uid = e_contact_get_const (iterator->data, E_CONTACT_UID);
			if (!avoid_uid)
				continue;

			if (!strcmp (avoid_uid, this_uid)) {
				avoid = TRUE;
				break;
			}
		}
		if (!avoid)
			remaining_contacts = g_list_prepend (remaining_contacts, this_contact);
	}

	remaining_contacts = g_list_reverse (remaining_contacts);

	for (i = remaining_contacts; i != NULL; i = g_list_next (i)) {
		EContact *this_contact = E_CONTACT (i->data);
		EABContactMatchType this_match = eab_contact_compare (info->contact, this_contact);
		if ((gint)this_match > (gint)best_match) {
			best_match = this_match;
			best_contact  = this_contact;
		}
	}

	g_list_free (remaining_contacts);

	info->cb (info->contact, best_contact, best_match, info->closure);
	match_search_info_free (info);
}

#define MAX_QUERY_PARTS 10
static void
use_common_book_cb (EBook *book, gpointer closure)
{
	MatchSearchInfo *info = (MatchSearchInfo *) closure;
	EContact *contact = info->contact;
	EContactName *contact_name;
	GList *contact_email;
	gchar *query_parts[MAX_QUERY_PARTS];
	gint p=0;
	gchar *contact_file_as, *qj;
	EBookQuery *query = NULL;
	gint i;

	if (book == NULL) {
		info->cb (info->contact, NULL, EAB_CONTACT_MATCH_NONE, info->closure);
		match_search_info_free (info);
		return;
	}

	contact_file_as = e_contact_get (contact, E_CONTACT_FILE_AS);
	if (contact_file_as) {
		query_parts [p++] = g_strdup_printf ("(contains \"file_as\" \"%s\")", contact_file_as);
		g_free (contact_file_as);
	}

	if (!e_contact_get (contact, E_CONTACT_IS_LIST)) {
		contact_name = e_contact_get (contact, E_CONTACT_NAME);
		if (contact_name) {
			if (contact_name->given && *contact_name->given)
				query_parts[p++] = g_strdup_printf ("(contains \"full_name\" \"%s\")", contact_name->given);

			if (contact_name->additional && *contact_name->additional)
				query_parts[p++] = g_strdup_printf ("(contains \"full_name\" \"%s\")", contact_name->additional);

			if (contact_name->family && *contact_name->family)
				query_parts[p++] = g_strdup_printf ("(contains \"full_name\" \"%s\")", contact_name->family);

			e_contact_name_free (contact_name);
		}

		contact_email = e_contact_get (contact, E_CONTACT_EMAIL);
		if (contact_email) {
			GList *iter;
			for (iter = contact_email; iter && p < MAX_QUERY_PARTS; iter = iter->next) {
				gchar *addr = g_strdup (iter->data);
				if (addr && *addr) {
					gchar *s = addr;
					while (*s) {
						if (*s == '@') {
							*s = '\0';
							break;
						}
						++s;
					}
					query_parts[p++] = g_strdup_printf ("(beginswith \"email\" \"%s\")", addr);
					g_free (addr);
				}
			}
		}
		g_list_foreach (contact_email, (GFunc)g_free, NULL);
		g_list_free (contact_email);
	}

	/* Build up our full query from the parts. */
	query_parts[p] = NULL;
	qj = g_strjoinv (" ", query_parts);
	for (i = 0; query_parts[i] != NULL; i++)
		g_free(query_parts[i]);
	if (p > 1) {
		gchar *s;
		s = g_strdup_printf ("(or %s)", qj);
		query = e_book_query_from_string (s);
		g_free (s);
	}
	else if (p == 1) {
		query = e_book_query_from_string (qj);
	}
	else {
		query = NULL;
	}

	if (query)
		e_book_async_get_contacts (book, query, query_cb, info);
	else
		query_cb (book, E_BOOK_ERROR_OK, NULL, info);

	g_free (qj);
	if (query)
		e_book_query_unref (query);
}

void
eab_contact_locate_match (EContact *contact, EABContactMatchQueryCallback cb, gpointer closure)
{
	MatchSearchInfo *info;

	g_return_if_fail (contact && E_IS_CONTACT (contact));
	g_return_if_fail (cb != NULL);

	info = g_new (MatchSearchInfo, 1);
	info->contact = contact;
	g_object_ref (contact);
	info->cb = cb;
	info->closure = closure;
	info->avoid = NULL;

	addressbook_load_default_book ((EBookCallback) use_common_book_cb, info);
}

/**
 * e_contact_locate_match_full:
 * @book: The book to look in.  If this is NULL, use the default
 * addressbook.
 * @contact: The contact to compare to.
 * @avoid: A list of contacts to not match.  These will not show up in the search.
 * @cb: The function to call.
 * @closure: The closure to add to the call.
 *
 * Look for the best match and return it using the EABContactMatchQueryCallback.
 **/
void
eab_contact_locate_match_full (EBook *book, EContact *contact, GList *avoid, EABContactMatchQueryCallback cb, gpointer closure)
{
	MatchSearchInfo *info;

	g_return_if_fail (contact && E_IS_CONTACT (contact));
	g_return_if_fail (cb != NULL);

	info = g_new (MatchSearchInfo, 1);
	info->contact = contact;
	g_object_ref (contact);
	info->cb = cb;
	info->closure = closure;
	info->avoid = g_list_copy (avoid);
	g_list_foreach (info->avoid, (GFunc) g_object_ref, NULL);

	if (book)
		use_common_book_cb (book, info);
	else
		addressbook_load_default_book ((EBookCallback) use_common_book_cb, info);
}