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[claws.git] / src / addrbook.c

/*
 * Claws Mail -- a GTK based, lightweight, and fast e-mail client
 * Copyright (C) 2001-2012 Match Grun and the Claws Mail team
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 * 
 */

/* General functions for accessing address book files */

#ifdef HAVE_CONFIG_H
#  include "config.h"
#include "claws-features.h"
#endif

#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <math.h>
#include <setjmp.h>

#include "utils.h"
#include "xml.h"
#include "mgutils.h"
#include "addritem.h"
#include "addrcache.h"
#include "addrbook.h"
#include "adbookbase.h"
#include "file-utils.h"

#ifndef DEV_STANDALONE
#include "prefs_gtk.h"
#include "codeconv.h"
#endif

#define ADDRBOOK_MAX_SEARCH_COUNT 1000
#define ADDRBOOK_PREFIX           "addrbook-"
#define ADDRBOOK_SUFFIX           ".xml"
#define FILE_NUMDIGITS            6

#define ID_TIME_OFFSET            998000000

static void addrbook_print_book         ( AddressBookFile *book, FILE *stream );

/**
 * Create new address book
 * \return Address book.
 */
AddressBookFile *addrbook_create_book()
{
        AddressBookFile *book;

        book = g_new0(AddressBookFile, 1);
        book->type = ADBOOKTYPE_BOOK;
        book->addressCache = addrcache_create();
        book->retVal = MGU_SUCCESS;
        book->path = NULL;
        book->fileName = NULL;
        book->maxValue = 0;
        book->tempList = NULL;
        book->tempHash = NULL;
        book->addressCache->modified = TRUE;

        return book;
}

/**
 * Specify name to be used
 * \param book  Address book.
 * \param value Name.
 */
void addrbook_set_name(AddressBookFile *book, const gchar *value)
{
        cm_return_if_fail(book != NULL);
        addrcache_set_name(book->addressCache, value);
}

gchar *addrbook_get_name(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_get_name(book->addressCache);
}

/**
 * Specify path to address book file.
 * \param book  Address book.
 * \param value Path.
 */
void addrbook_set_path(AddressBookFile *book, const gchar *value)
{
        cm_return_if_fail(book != NULL);
        book->path = mgu_replace_string(book->path, value);
        addrcache_set_dirty(book->addressCache, TRUE);
}

/**
 * Specify filename to be used
 * \param book  Address book.
 * \param value Filename.
 */
void addrbook_set_file(AddressBookFile *book, const gchar *value)
{
        cm_return_if_fail(book != NULL);
        book->fileName = mgu_replace_string(book->fileName, value);
        addrcache_set_dirty(book->addressCache, TRUE);
}

gboolean addrbook_get_modified(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, FALSE);
        return book->addressCache->modified;
}

gboolean addrbook_get_accessed(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, FALSE);
        return book->addressCache->accessFlag;
}

/**
 * Specify address book as accessed.
 * \param book  Address book.
 * \param value Value.
 */
void addrbook_set_accessed(AddressBookFile *book, const gboolean value)
{
        cm_return_if_fail(book != NULL);
        book->addressCache->accessFlag = value;
}

gboolean addrbook_get_read_flag(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, FALSE);
        return book->addressCache->dataRead;
}

gint addrbook_get_status(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, -1);
        return book->retVal;
}

ItemFolder *addrbook_get_root_folder(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_get_root_folder(book->addressCache);
}

GList *addrbook_get_list_folder(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_get_list_folder(book->addressCache);
}

GList *addrbook_get_list_person(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_get_list_person(book->addressCache);
}

gboolean addrbook_get_dirty(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, FALSE);
        return addrcache_get_dirty(book->addressCache);
}

/**
 * Set address book as dirty (needs to be written to file).
 * \param book  Address book.
 * \param value Dirty flag.
 */
void addrbook_set_dirty(AddressBookFile *book, const gboolean value)
{
        cm_return_if_fail(book != NULL);
        addrcache_set_dirty(book->addressCache, value);
}

/**
 * Free address book.
 * \param book Address book.
 */
void addrbook_free_book(AddressBookFile *book)
{
        cm_return_if_fail(book != NULL);

        /* Clear cache */
        addrcache_free(book->addressCache);

        /* Free up internal objects */
        g_free(book->path);
        g_free(book->fileName);
        g_list_free(book->tempList);

        book->path = NULL;
        book->fileName = NULL;
        book->maxValue = 0;
        book->tempList = NULL;
        book->tempHash = NULL;

        book->type = ADBOOKTYPE_NONE;
        book->addressCache = NULL;
        book->retVal = MGU_SUCCESS;

        g_free(book);
}

/**
 * Print address book header.
 * \param book   Address book.
 * \param stream Output stream.
 */
static void addrbook_print_book(AddressBookFile *book, FILE *stream)
{
        cm_return_if_fail(book != NULL);

        fprintf(stream, "AddressBook:\n");
        fprintf(stream, "\tpath : '%s'\n", book->path);
        fprintf(stream, "\tfile : '%s'\n", book->fileName);
        fprintf(stream, "\tstatus : %d\n", book->retVal );
        addrcache_print(book->addressCache, stream);
}

/**
 * Dump entire address book traversing folders.
 * \param book   Address book.
 * \param stream Output stream.
 */
void addrbook_dump_book(AddressBookFile *book, FILE *stream)
{
        ItemFolder *folder;

        cm_return_if_fail(book != NULL);

        addrbook_print_book(book, stream);
        folder = book->addressCache->rootFolder;
        addritem_print_item_folder(folder, stream);
}

/**
 * Remove specified group from address book. Note that object should still
 * be freed.
 * Specify name to be used
 * \param book  Address book.
 * \param group Group to remove.
 * \param value Name.
 * \return Group, or NULL if not found. 
 */
ItemGroup *addrbook_remove_group(AddressBookFile *book, ItemGroup *group)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_remove_group(book->addressCache, group);
}

/**
 * Remove specified person from address book. Note that object should still
 * be freed.
 * \param  book   Address book.
 * \param  person Person to remove.
 * \return Person, or NULL if not found.
 */
ItemPerson *addrbook_remove_person(AddressBookFile *book, ItemPerson *person)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_remove_person(book->addressCache, person);
}

/**
 * Remove specified email address in address book for specified person.
 * Note that object should still be freed.
 * \param  book   Address book.
 * \param  person Person.
 * \param  email  EMail to remove.
 * \return EMail object, or NULL if not found.
 */
ItemEMail *addrbook_person_remove_email(AddressBookFile *book,
                                        ItemPerson *person, ItemEMail *email)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_person_remove_email(book->addressCache, person, email);
}

/*
* ***********************************************************************
* Read/Write XML data file...
* ===========================
* Notes:
* 1)    The address book is structured as follows:
*
*               address-book
*                       person
*                               address-list
*                                       address
*                               attribute-list
*                                       attribute
*                       group
*                               member-list
*                                       member
*                       folder
*                               item-list
*                                       item
*
* 2)    This sequence of elements was chosen so that the most important
*       elements (person and their email addresses) appear first.
*
* 3)    Groups then appear. When groups are loaded, person's email
*       addresses have already been loaded and can be found.
*
* 4)    Finally folders are loaded. Any forward and backward references
*       to folders, groups and persons in the folders are resolved after
*       loading.
*
* ***********************************************************************
*/

/* Element tag names */
#define AB_ELTAG_ADDRESS         "address"
#define AB_ELTAG_ATTRIBUTE       "attribute"
#define AB_ELTAG_ATTRIBUTE_LIST  "attribute-list"
#define AB_ELTAG_ADDRESS_LIST    "address-list"
#define AB_ELTAG_MEMBER          "member"
#define AB_ELTAG_MEMBER_LIST     "member-list"
#define AB_ELTAG_ITEM            "item"
#define AB_ELTAG_ITEM_LIST       "item-list"
#define AB_ELTAG_ADDRESS_BOOK    "address-book"
#define AB_ELTAG_PERSON          "person"
#define AB_ELTAG_GROUP           "group"
#define AB_ELTAG_FOLDER          "folder"

/* Attribute tag names */
#define AB_ATTAG_TYPE            "type"
#define AB_ATTAG_UID             "uid"
#define AB_ATTAG_NAME            "name"
#define AB_ATTAG_REMARKS         "remarks"
#define AB_ATTAG_FIRST_NAME      "first-name"
#define AB_ATTAG_LAST_NAME       "last-name"
#define AB_ATTAG_NICK_NAME       "nick-name"
#define AB_ATTAG_COMMON_NAME     "cn"
#define AB_ATTAG_ALIAS           "alias"
#define AB_ATTAG_EMAIL           "email"
#define AB_ATTAG_EID             "eid"
#define AB_ATTAG_PID             "pid"

/* Attribute values */
#define AB_ATTAG_VAL_PERSON      "person"
#define AB_ATTAG_VAL_GROUP       "group"
#define AB_ATTAG_VAL_FOLDER      "folder"

/**
 * Parse address item for person from XML file.
 * \param book   Address book.
 * \param file   XML file handle.
 * \param person Person.
 */
static void addrbook_parse_address(AddressBookFile *book, XMLFile *file, 
                                   ItemPerson *person)
{
        GList *attr;
        gchar *name, *value;
        ItemEMail *email = NULL;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if (!email)
                        email = addritem_create_item_email();
                if (strcmp(name, AB_ATTAG_UID) == 0)
                        ADDRITEM_ID(email) = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_ALIAS) == 0)
                        ADDRITEM_NAME(email) = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_EMAIL) == 0)
                        email->address = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_REMARKS) == 0)
                        email->remarks = g_strdup(value);
                attr = g_list_next(attr);
        }
        if (email) {
                if (person) {
                        addrcache_person_add_email(book->addressCache, person,
                                                   email);
                }
                else {
                        addritem_free_item_email(email);
                        email = NULL;
                }
        }
}

/**
 * Parse list of email address for person from XML file.
 * \param book   Address book.
 * \param file   XML file handle.
 * \param person Person.
 */
static void addrbook_parse_addr_list(AddressBookFile *book, XMLFile *file, 
                                     ItemPerson *person)
{
        guint prev_level;

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file)) {
                        longjmp(book->jumper, 1);
                }
                if (file->level < prev_level) return;
                if (xml_compare_tag(file, AB_ELTAG_ADDRESS)) {
                        addrbook_parse_address(book, file, person);
                        addrbook_parse_addr_list(book, file, person);
                }
        }
}

/**
 * Parse attribute for person from XML file.
 * \param book   Address book.
 * \param file   XML file handle.
 * \param person Person.
 */
static void addrbook_parse_attribute(XMLFile *file, ItemPerson *person)
{
        GList *attr;
        gchar *name, *value;
        gchar *element;
        UserAttribute *uAttr = NULL;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if (!uAttr) uAttr = addritem_create_attribute();
                if (strcmp(name, AB_ATTAG_UID) == 0)
                        addritem_attrib_set_id(uAttr, value);
                else if (strcmp(name, AB_ATTAG_NAME) == 0) 
                        addritem_attrib_set_name(uAttr, value);
                attr = g_list_next(attr);
        }

        element = xml_get_element(file);
        addritem_attrib_set_value(uAttr, element);
        g_free(element);

        if (uAttr) {
                if (person) {
                        addritem_person_add_attribute(person, uAttr);
                }
                else {
                        addritem_free_attribute(uAttr);
                        uAttr = NULL;
                }
        }
}

/**
 * Parse list of attributes for person from XML file.
 * \param book   Address book.
 * \param file   XML file handle.
 * \param person Person.
 */
static void addrbook_parse_attr_list(AddressBookFile *book, XMLFile *file, 
                                     ItemPerson *person)
{
        guint prev_level;

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file)) {
                        longjmp( book->jumper, 1 );
                }
                if (file->level < prev_level) return;
                if (xml_compare_tag(file, AB_ELTAG_ATTRIBUTE)) {
                        addrbook_parse_attribute(file, person);
                        addrbook_parse_attr_list(book, file, person);
                }
        }
}

/**
 * Parse person from XML file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_parse_person(AddressBookFile *book, XMLFile *file)
{
        GList *attr;
        gchar *name, *value;
        ItemPerson *person = NULL;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if (!person) 
                        person = addritem_create_item_person();
                if (strcmp(name, AB_ATTAG_UID) == 0) {
                        ADDRITEM_ID(person) = g_strdup(value);
                        person->picture = g_strdup(value);
                }
                else if (strcmp(name, AB_ATTAG_FIRST_NAME) == 0)
                        person->firstName = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_LAST_NAME) == 0)
                        person->lastName = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_NICK_NAME) == 0)
                        person->nickName = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_COMMON_NAME) == 0)
                        ADDRITEM_NAME(person) = g_strdup(value);
                attr = g_list_next(attr);
        }
        if (xml_parse_next_tag(file)) { /* Consume closing tag */
                longjmp(book->jumper, 1);
        }
        if (xml_compare_tag(file, AB_ELTAG_ADDRESS_LIST)) {
                addrbook_parse_addr_list(book, file, person);
                if (person) {
                        addrcache_hash_add_person(book->addressCache, person);
                }
        }
        if (xml_parse_next_tag(file)) { /* Consume closing tag */
                longjmp(book->jumper, 1);
        }
        if (xml_compare_tag(file, AB_ELTAG_ATTRIBUTE_LIST)) {
                addrbook_parse_attr_list(book, file, person);
        }
}

/**
 * Parse group member from XML file.
 * \param book  Address book.
 * \param file  XML file handle.
 * \param group Group.
 */
static void addrbook_parse_member(AddressBookFile *book, XMLFile *file, 
                                  ItemGroup *group)
{
        GList *attr;
        gchar *name, *value;
        gchar *eid = NULL;
        /* gchar *pid = NULL; */
        ItemEMail *email = NULL;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if( strcmp( name, AB_ATTAG_EID ) == 0 )
                        eid = g_strdup( value );
                attr = g_list_next(attr);
        }
        /* email = addrcache_get_email( book->addressCache, pid, eid ); */
        email = addrcache_get_email(book->addressCache, eid);
        g_free(eid);
        if (email) {
                if (group) {
                        addrcache_group_add_email(book->addressCache, group, 
                                                  email);
                }
                else {
                        addritem_free_item_email(email);
                        email = NULL;
                }
        }
}

/**
 * Parse list of group members from XML file.
 * \param book  Address book.
 * \param file  XML file handle.
 * \param group Group.
 */
static void addrbook_parse_member_list(AddressBookFile *book, XMLFile *file, 
                                       ItemGroup *group)
{
        guint prev_level;

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file)) {
                        longjmp(book->jumper, 1);
                }
                if (file->level < prev_level)
                        return;
                if (xml_compare_tag(file, AB_ELTAG_MEMBER)) {
                        addrbook_parse_member(book, file, group);
                        addrbook_parse_member_list(book, file, group);
                }
        }
}

/**
 * Parse group object from XML file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_parse_group(AddressBookFile *book, XMLFile *file)
{
        GList *attr;
        gchar *name, *value;
        ItemGroup *group = NULL;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if (!group) 
                        group = addritem_create_item_group();
                if (strcmp(name, AB_ATTAG_UID) == 0) 
                        ADDRITEM_ID(group) = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_NAME) == 0)
                        ADDRITEM_NAME(group) = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_REMARKS) == 0)
                        group->remarks = g_strdup(value);
                attr = g_list_next(attr);
        }
        if (xml_parse_next_tag(file)) { /* Consume closing tag */
                longjmp(book->jumper, 1);
        }
        if (xml_compare_tag(file, AB_ELTAG_MEMBER_LIST)) {
                if (group) {
                        addrcache_hash_add_group(book->addressCache, group);
                }
                addrbook_parse_member_list(book, file, group);
        } else {
                if (group)
                        addritem_free_item_group(group);
        }    
}

/**
 * Parse folder item from XML file.
 * \param book   Address book.
 * \param file   XML file handle.
 * \param folder Folder.
 */
static void addrbook_parse_folder_item(AddressBookFile *book, XMLFile *file, 
                                       ItemFolder *folder)
{
        GList *attr;
        gchar *name, *value;
        gchar *uid = NULL;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if (strcmp(name, AB_ATTAG_UID) == 0) {
                        uid = g_strdup(value);
                }
                attr = g_list_next(attr);
        }
        if (folder) {
                if (uid) {
                        folder->listItems = g_list_append(folder->listItems, uid);
                }
        }
}

/**
 * Parse list of folder items from XML file.
 * \param book   Address book.
 * \param file   XML file handle.
 * \param folder Folder.
 */
static void addrbook_parse_folder_list(AddressBookFile *book, XMLFile *file,
                                       ItemFolder *folder)
{
        guint prev_level;

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file)) {
                        longjmp(book->jumper, 1);
                }
                if (file->level < prev_level)
                        return;
                if (xml_compare_tag(file, AB_ELTAG_ITEM)) {
                        addrbook_parse_folder_item(book, file, folder);
                        addrbook_parse_folder_list(book, file, folder);
                }
        }
}

/**
 * Parse folder from XML file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_parse_folder(AddressBookFile *book, XMLFile *file) 
{
        GList *attr;
        gchar *name, *value;
        ItemFolder *folder = NULL;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if (!folder)
                        folder = addritem_create_item_folder();
                if (strcmp(name, AB_ATTAG_UID) == 0)
                        ADDRITEM_ID(folder) = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_NAME) == 0)
                        ADDRITEM_NAME(folder) = g_strdup(value);
                else if (strcmp(name, AB_ATTAG_REMARKS) == 0)
                        folder->remarks = g_strdup(value);
                attr = g_list_next(attr);
        }
        if (xml_parse_next_tag(file)) { /* Consume closing tag */
                longjmp(book->jumper, 1);
        }
        if (xml_compare_tag(file, AB_ELTAG_ITEM_LIST)) {
                if (folder) {
                        if (addrcache_hash_add_folder(book->addressCache, 
                                                      folder)) {
                                book->tempList = g_list_append(book->tempList, 
                                                               folder);
                                /* We will resolve folder later */
                                ADDRITEM_PARENT(folder) = NULL;
                        }
                }
                addrbook_parse_folder_list(book, file, folder);
        } else {
                if (folder)
                        addritem_free_item_folder(folder);
        }
}

/**
 * Read address book (DOM) tree from file.
 * \param  book Address book.
 * \param  file XML file handle.
 * \return <i>TRUE</i> if data read successfully, <i>FALSE</i> if error
 *         reading data.
 */
static gboolean addrbook_read_tree(AddressBookFile *book, XMLFile *file)
{
        gboolean retVal;
        GList *attr;
        gchar *name, *value;

        book->retVal = MGU_BAD_FORMAT;
        if (xml_get_dtd(file))
                return FALSE;
        if (xml_parse_next_tag(file))
                longjmp(book->jumper, 1);
        if (!xml_compare_tag(file, AB_ELTAG_ADDRESS_BOOK))
                return FALSE;

        attr = xml_get_current_tag_attr(file);
        while (attr) {
                name = ((XMLAttr *)attr->data)->name;
                value = ((XMLAttr *)attr->data)->value;
                if (strcmp( name, AB_ATTAG_NAME) == 0)
                        addrbook_set_name( book, value );
                attr = g_list_next( attr );
        }

        retVal = TRUE;
        for (;;) {
                if (!file->level)
                        break;
                /* Get next item tag (person, group or folder) */
                if (xml_parse_next_tag(file))
                        longjmp( book->jumper, 1 );
                        
                if (xml_compare_tag(file, AB_ELTAG_PERSON))
                        addrbook_parse_person(book, file);
                else if (xml_compare_tag(file, AB_ELTAG_GROUP))
                        addrbook_parse_group(book, file);
                else if (xml_compare_tag(file, AB_ELTAG_FOLDER))
                        addrbook_parse_folder(book, file);
        }
        if (retVal) book->retVal = MGU_SUCCESS;
                return retVal;
}

/**
 * Resolve folder items callback function.
 * \param key   Table key.
 * \param value Reference to object contained in folder.
 * \param data  Reference to address book.
 */
static void addrbook_res_items_vis(gpointer key, gpointer value, gpointer data)
{
        AddressBookFile *book = data;
        AddrItemObject *obj = (AddrItemObject *) value;
        ItemFolder *rootFolder = book->addressCache->rootFolder;
        if (obj->parent == NULL) {
                if (ADDRITEM_TYPE(obj) == ITEMTYPE_PERSON) {
                        rootFolder->listPerson = g_list_append(rootFolder->listPerson,
                                                               obj);
                        ADDRITEM_PARENT(obj) = ADDRITEM_OBJECT(rootFolder);
                }
                else if (ADDRITEM_TYPE(obj) == ITEMTYPE_GROUP) {
                        rootFolder->listGroup = g_list_append(rootFolder->listGroup,
                                                              obj);
                        ADDRITEM_PARENT(obj) = ADDRITEM_OBJECT(rootFolder);
                }
        }
}

/**
 * Resolve folder items. Lists of UID's are replaced with pointers to
 * data items.
 * \param  book Address book.
 */
static void addrbook_resolve_folder_items(AddressBookFile *book)
{
        GList *nodeFolder = NULL;
        GList *listRemove = NULL;
        GList *node = NULL;
        ItemFolder *rootFolder = book->addressCache->rootFolder;
        nodeFolder = book->tempList;
        
        while (nodeFolder) {
                ItemFolder *folder = nodeFolder->data;
                listRemove = NULL;
                node = folder->listItems;
                while (node) {
                        gchar *uid = node->data;
                        AddrItemObject *aio = addrcache_get_object(book->addressCache, 
                                                                   uid);
                        if (aio) {
                                if (aio->type == ITEMTYPE_FOLDER) {
                                        ItemFolder *item = (ItemFolder *) aio;
                                        folder->listFolder = g_list_append(folder->listFolder, item);
                                        ADDRITEM_PARENT(item) = ADDRITEM_OBJECT(folder);
                                        addrcache_hash_add_folder(book->addressCache, folder);
                                }
                                else if (aio->type == ITEMTYPE_PERSON) {
                                        ItemPerson *item = (ItemPerson *) aio;
                                        folder->listPerson = g_list_append(folder->listPerson, item);
                                        ADDRITEM_PARENT(item) = ADDRITEM_OBJECT(folder);
                                }
                                else if (aio->type == ITEMTYPE_GROUP) {
                                        ItemGroup *item = (ItemGroup *) aio;
                                        folder->listGroup = g_list_append(folder->listGroup, item);
                                        ADDRITEM_PARENT(item) = ADDRITEM_OBJECT(folder);
                                }
                                /* Replace data with pointer to item */
                                g_free(uid);
                                node->data = aio;
                        }
                        else { /* Not found, append to remove list. */
                                listRemove = g_list_append(listRemove, uid);
                        }
                        node = g_list_next(node);
                }
                rootFolder->listFolder = g_list_append(rootFolder->listFolder, 
                                                       folder);
                /* Process remove list */
                node = listRemove;
                while (node) {
                        gchar *uid = node->data;
                        folder->listItems = g_list_remove(folder->listItems,
                                                          uid);
                        g_free(uid);
                        node = g_list_next(node);
                }
                g_list_free(listRemove);
                nodeFolder = g_list_next(nodeFolder);
        }
        /* Remove folders with parents. */
        listRemove = NULL;
        node = rootFolder->listFolder;
        while (node) {
                ItemFolder *folder = (ItemFolder *) node->data;
                if (ADDRITEM_PARENT(folder))
                        /* Remove folders with parents */
                        listRemove = g_list_append(listRemove, folder);
                else /* Add to root folder */
                        ADDRITEM_PARENT(folder) = ADDRITEM_OBJECT(book->addressCache->rootFolder);

                node = g_list_next( node );
        }
        /* Process remove list */
        node = listRemove;
        while (node) {
                rootFolder->listFolder = g_list_remove(rootFolder->listFolder, 
                                                       node->data);
                node = g_list_next(node);
        }
        g_list_free(listRemove);

        /* Move all unparented persons and groups into root folder */
        g_hash_table_foreach(book->addressCache->itemHash, 
                             addrbook_res_items_vis, book);

        /* Free up some more */
        nodeFolder = book->tempList;
        while (nodeFolder) {
                ItemFolder *folder = nodeFolder->data;
                g_list_free(folder->listItems);
                folder->listItems = NULL;
                nodeFolder = g_list_next(nodeFolder);
        }
        g_list_free(book->tempList);
        book->tempList = NULL;
}

/**
 * Read address book.
 * \param  book Address book.
 * \return Status code.
 */
gint addrbook_read_data(AddressBookFile *book)
{
        XMLFile *file = NULL;
        gchar *fileSpec = NULL;

        cm_return_val_if_fail(book != NULL, -1);

        /*
        g_print( "...addrbook_read_data :%s:\t:%s:\n", book->fileName,
                addrcache_get_name( book->addressCache ) );
        */

        fileSpec = g_strconcat(book->path, G_DIR_SEPARATOR_S, 
                               book->fileName, NULL);
        book->retVal = MGU_OPEN_FILE;
        addrcache_clear(book->addressCache);
        book->addressCache->modified = FALSE;
        book->addressCache->accessFlag = FALSE;
        file = xml_open_file(fileSpec);
        g_free(fileSpec);
        if (file) {
                book->tempList = NULL;
                /* Trap for parsing errors. */
                if (setjmp( book->jumper)) {
                        xml_close_file(file);
                        return book->retVal;
                }
                addrbook_read_tree(book, file);
                xml_close_file(file);
                /* Resolve folder items */
                addrbook_resolve_folder_items(book);
                book->tempList = NULL;
                book->addressCache->modified = FALSE;
                book->addressCache->dataRead = TRUE;
                addrcache_set_dirty(book->addressCache, FALSE);
        }
        return book->retVal;
}

/**
 * Write start element to file.
 * \param fp   File handle.
 * \param lvl  Indent level.
 * \param name Element name.
 */
static int addrbook_write_elem_s(FILE *fp, gint lvl, gchar *name)
{
        gint i;
        for (i = 0; i < lvl; i++) 
                if (claws_fputs("  ", fp) == EOF)
                        return -1;
        if (claws_fputs("<", fp) == EOF)
                return -1;
        if (claws_fputs(name, fp) == EOF)
                return -1;
                
        return 0;
}

/**
 * Write end element to file.
 * \param fp   File handle.
 * \param lvl  Indent level.
 * \param name Element name.
 */
static int addrbook_write_elem_e(FILE *fp, gint lvl, gchar *name)
{
        gint i;
        for(i = 0; i < lvl; i++)
                if (claws_fputs("  ", fp) == EOF)
                        return -1;
        if (claws_fputs("</", fp) == EOF)
                return -1;
        if (claws_fputs(name, fp) == EOF)
                return -1;
        if (claws_fputs(">\n", fp) == EOF)
                return -1;
                
        return 0;
}

/**
 * Write attribute name/value pair to file.
 * \param fp    File handle.
 * \param name  Attribute name.
 * \param value Attribute value.
 */
static int addrbook_write_attr(FILE *fp, gchar *name, gchar *value)
{
        if (claws_fputs(" ", fp) == EOF)
                return -1;
        if (claws_fputs(name, fp) == EOF)
                return -1;
        if (claws_fputs("=\"", fp) == EOF)
                return -1;
        if (xml_file_put_escape_str(fp, value) < 0)
                return -1;
        if (claws_fputs("\"", fp) == EOF)
                return -1;
        
        return 0;
}

typedef struct _HashLoopData {
        FILE *fp;
        gboolean error;
} HashLoopData;

/**
 * Write person and associated addresses and attributes to file.
 * file hash table visitor function.
 * \param key   Table key.
 * \param value Reference to person.
 * \param data  File pointer.
 */
static void addrbook_write_item_person_vis(gpointer key, gpointer value, 
                                           gpointer d)
{
        AddrItemObject *obj = (AddrItemObject *) value;
        HashLoopData *data = (HashLoopData *)d;
        FILE *fp = data->fp;
        GList *node;

        if (!obj)
                return;
        if (ADDRITEM_TYPE(obj) == ITEMTYPE_PERSON) {
                ItemPerson *person = (ItemPerson *) value;
                if (person) {
                        if (addrbook_write_elem_s(fp, 1, AB_ELTAG_PERSON) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_UID, ADDRITEM_ID(person)) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_FIRST_NAME, person->firstName) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_LAST_NAME, person->lastName) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_NICK_NAME, person->nickName) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_COMMON_NAME, ADDRITEM_NAME(person)) < 0)
                                data->error = TRUE;
                        if (claws_fputs(" >\n", fp) == EOF)
                                data->error = TRUE;

                        /* Output email addresses */
                        if (addrbook_write_elem_s(fp, 2, AB_ELTAG_ADDRESS_LIST) < 0)
                                data->error = TRUE;
                        if (claws_fputs(">\n", fp) == EOF)
                                data->error = TRUE;
                        node = person->listEMail;
                        while (node) {
                                ItemEMail *email = node->data;
                                if (addrbook_write_elem_s(fp, 3, AB_ELTAG_ADDRESS) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_UID, ADDRITEM_ID(email)) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_ALIAS, ADDRITEM_NAME(email)) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_EMAIL, email->address) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_REMARKS, email->remarks) < 0)
                                        data->error = TRUE;
                                if (claws_fputs(" />\n", fp) == EOF)
                                        data->error = TRUE;
                                node = g_list_next(node);
                        }
                        if (addrbook_write_elem_e(fp, 2, AB_ELTAG_ADDRESS_LIST) < 0)
                                data->error = TRUE;

                        /* Output user attributes */
                        if (addrbook_write_elem_s(fp, 2, AB_ELTAG_ATTRIBUTE_LIST) < 0)
                                data->error = TRUE;
                        if (claws_fputs(">\n", fp) == EOF)
                                data->error = TRUE;
                        node = person->listAttrib;
                        while (node) {
                                UserAttribute *attrib = node->data;
                                if (addrbook_write_elem_s(fp, 3, AB_ELTAG_ATTRIBUTE) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_UID, attrib->uid) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_NAME, attrib->name) < 0)
                                        data->error = TRUE;
                                if (claws_fputs(" >", fp) == EOF)
                                        data->error = TRUE;
                                if (xml_file_put_escape_str(fp, attrib->value) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_elem_e(fp, 0, AB_ELTAG_ATTRIBUTE) < 0)
                                        data->error = TRUE;
                                node = g_list_next(node);
                        }
                        if (addrbook_write_elem_e(fp, 2, AB_ELTAG_ATTRIBUTE_LIST) < 0)
                                data->error = TRUE;
                        if (addrbook_write_elem_e(fp, 1, AB_ELTAG_PERSON) < 0)
                                data->error = TRUE;
                }
        }
}

/**
 * Write group and associated references to addresses to file.
 * file hash table visitor function.
 * \param key   Table key.
 * \param value Reference to group.
 * \param data  File pointer.
 */
static void addrbook_write_item_group_vis(gpointer key, gpointer value, 
                                          gpointer d)
{
        AddrItemObject *obj = (AddrItemObject *) value;
        HashLoopData *data = (HashLoopData *)d;
        FILE *fp = data->fp;

        GList *node;

        if (!obj)
                return;
        if (ADDRITEM_TYPE(obj) == ITEMTYPE_GROUP) {
                ItemGroup *group = (ItemGroup *) value;
                if (group) {
                        if (addrbook_write_elem_s(fp, 1, AB_ELTAG_GROUP) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_UID, ADDRITEM_ID(group)) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_NAME, ADDRITEM_NAME(group)) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_REMARKS, group->remarks) < 0)
                                data->error = TRUE;
                        if (claws_fputs(" >\n", fp) == EOF)
                                data->error = TRUE;

                        /* Output email address links */
                        if (addrbook_write_elem_s(fp, 2, AB_ELTAG_MEMBER_LIST) < 0)
                                data->error = TRUE;
                        if (claws_fputs(">\n", fp) == EOF)
                                data->error = TRUE;
                        node = group->listEMail;
                        while (node) {
                                ItemEMail *email = node->data;
                                ItemPerson *person = (ItemPerson *) ADDRITEM_PARENT(email);
                                if (addrbook_write_elem_s(fp, 3, AB_ELTAG_MEMBER) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_PID, ADDRITEM_ID(person)) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_EID, ADDRITEM_ID(email)) < 0)
                                        data->error = TRUE;
                                if (claws_fputs(" />\n", fp) == EOF)
                                        data->error = TRUE;
                                node = g_list_next(node);
                        }
                        if (addrbook_write_elem_e(fp, 2, AB_ELTAG_MEMBER_LIST) < 0)
                                data->error = TRUE;
                        if (addrbook_write_elem_e(fp, 1, AB_ELTAG_GROUP) < 0)
                                data->error = TRUE;
                }
        }
}

/**
 * Write folder and associated references to addresses to file.
 * file hash table visitor function.
 * \param key   Table key.
 * \param value Reference to folder.
 * \param data  File pointer.
 */
static void addrbook_write_item_folder_vis(gpointer key, gpointer value, 
                                           gpointer d)
{
        AddrItemObject *obj = (AddrItemObject *) value;
        HashLoopData *data = (HashLoopData *)d;
        FILE *fp = data->fp;
        GList *node;

        if (!obj)
                return;
        if (ADDRITEM_TYPE(obj) == ITEMTYPE_FOLDER) {
                ItemFolder *folder = (ItemFolder *) value;
                if (folder) {
                        if (addrbook_write_elem_s(fp, 1, AB_ELTAG_FOLDER) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_UID, ADDRITEM_ID(folder)) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_NAME, ADDRITEM_NAME(folder)) < 0)
                                data->error = TRUE;
                        if (addrbook_write_attr(fp, AB_ATTAG_REMARKS, folder->remarks) < 0)
                                data->error = TRUE;
                        if (claws_fputs(" >\n", fp) == EOF)
                                data->error = TRUE;
                        if (addrbook_write_elem_s(fp, 2, AB_ELTAG_ITEM_LIST) < 0)
                                data->error = TRUE;
                        if (claws_fputs(">\n", fp) == EOF)
                                data->error = TRUE;

                        /* Output persons */
                        node = folder->listPerson;
                        while (node) {
                                ItemPerson *item = node->data;
                                if (addrbook_write_elem_s(fp, 3, AB_ELTAG_ITEM) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_TYPE,  AB_ATTAG_VAL_PERSON) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_UID, ADDRITEM_ID(item)) < 0)
                                        data->error = TRUE;
                                if (claws_fputs(" />\n", fp) == EOF)
                                        data->error = TRUE;
                                node = g_list_next(node);
                        }

                        /* Output groups */
                        node = folder->listGroup;
                        while (node) {
                                ItemGroup *item = node->data;
                                if (addrbook_write_elem_s(fp, 3, AB_ELTAG_ITEM) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_TYPE, AB_ATTAG_VAL_GROUP) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_UID, ADDRITEM_ID(item)) < 0)
                                        data->error = TRUE;
                                if (claws_fputs(" />\n", fp) == EOF)
                                        data->error = TRUE;
                                node = g_list_next(node);
                        }

                        /* Output folders */
                        node = folder->listFolder;
                        while (node) {
                                ItemFolder *item = node->data;
                                if (addrbook_write_elem_s(fp, 3, AB_ELTAG_ITEM) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_TYPE, AB_ATTAG_VAL_FOLDER) < 0)
                                        data->error = TRUE;
                                if (addrbook_write_attr(fp, AB_ATTAG_UID, ADDRITEM_ID(item)) < 0)
                                        data->error = TRUE;
                                if (claws_fputs(" />\n", fp) == EOF)
                                        data->error = TRUE;
                                node = g_list_next(node);
                        }
                        if (addrbook_write_elem_e(fp, 2, AB_ELTAG_ITEM_LIST) < 0)
                                data->error = TRUE;
                        if (addrbook_write_elem_e(fp, 1, AB_ELTAG_FOLDER) < 0)
                                data->error = TRUE;
                }
        }
}

/**
 * Output address book data to specified file.
 * \param  book Address book.
 * \param  newFile Filename of new file (in book's filepath).
 * \return Status code.
 */
static gint addrbook_write_to(AddressBookFile *book, gchar *newFile)
{
        FILE *fp;
        gchar *fileSpec;
        HashLoopData data;
#ifndef DEV_STANDALONE
        PrefFile *pfile;
#endif

        cm_return_val_if_fail(book != NULL, -1);
        cm_return_val_if_fail(newFile != NULL, -1);

        fileSpec = g_strconcat(book->path, G_DIR_SEPARATOR_S, newFile, NULL);

        book->retVal = MGU_OPEN_FILE;
#ifdef DEV_STANDALONE
        fp = claws_fopen(fileSpec, "wb");
        g_free(fileSpec);
        if (fp) {
                if (claws_fputs("<?xml version=\"1.0\" ?>\n", fp) == EOF) {
                        book->retVal = MGU_ERROR_WRITE;
                        return book->retVal;
                }
#else
        pfile = prefs_write_open(fileSpec);
        g_free(fileSpec);
        if (pfile) {
                fp = pfile->fp;
                if (fprintf( fp, "<?xml version=\"1.0\" encoding=\"%s\" ?>\n", CS_INTERNAL ) < 0)
                        goto fail;
#endif
                if (addrbook_write_elem_s(fp, 0, AB_ELTAG_ADDRESS_BOOK) < 0)
                        goto fail;
                if (addrbook_write_attr(fp, AB_ATTAG_NAME,
                                    addrcache_get_name(book->addressCache)) < 0)
                        goto fail;
                if (claws_fputs(" >\n", fp) == EOF)
                        goto fail;

                /* Output all persons */
                data.fp = fp;
                data.error = FALSE;

                g_hash_table_foreach(book->addressCache->itemHash, 
                                     addrbook_write_item_person_vis, &data);
                if (data.error)
                        goto fail;

                /* Output all groups */
                g_hash_table_foreach(book->addressCache->itemHash, 
                                     addrbook_write_item_group_vis, &data);

                if (data.error)
                        goto fail;

                /* Output all folders */
                g_hash_table_foreach(book->addressCache->itemHash, 
                                     addrbook_write_item_folder_vis, &data);

                if (data.error)
                        goto fail;

                if (addrbook_write_elem_e(fp, 0, AB_ELTAG_ADDRESS_BOOK) < 0)
                        goto fail;

                book->retVal = MGU_SUCCESS;
#ifdef DEV_STANDALONE
                claws_safe_fclose(fp);
#else
                if (prefs_file_close( pfile ) < 0)
                        book->retVal = MGU_ERROR_WRITE;
#endif
        }

        fileSpec = NULL;
        return book->retVal;
fail:
        g_warning("error writing AB");
        book->retVal = MGU_ERROR_WRITE;
        if (pfile)
                prefs_file_close_revert( pfile );
        return book->retVal;
}

/**
 * Output address book data to original file.
 * \param  book Address book.
 * \return Status code.
 */
gint addrbook_save_data(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, -1);

        book->retVal = MGU_NO_FILE;
        if (book->fileName == NULL || *book->fileName == '\0') 
                return book->retVal;
        if (book->path == NULL || *book->path == '\0')
                return book->retVal;

        addrbook_write_to(book, book->fileName);
        if (book->retVal == MGU_SUCCESS)
                addrcache_set_dirty(book->addressCache, FALSE);
        return book->retVal;
}

/*
 * **********************************************************************
 * Address book edit interface functions.
 * **********************************************************************
 */

/**
 * Hash table callback function for simple deletion of hashtable entries.
 * \param  key   Table key (will be freed).
 * \param  value Value stored in table.
 * \param  data  User data.
 * \return <i>TRUE</i> to indicate that entry freed.
 */
static gboolean addrbook_free_simple_hash_vis(gpointer *key, gpointer *value, 
                                              gpointer *data)
{
        g_free(key);
        key = NULL;
        value = NULL;
        return TRUE;
}

/**
 * Update address book email list for specified person. Note: The existing
 * email addresses are replaced with the new addresses. Any references to
 * old addresses in the groups are re-linked to the new addresses. All old
 * addresses linked to the person are removed.
 * \param book      Address book.
 * \param person    Person to update.
 * \param listEMail List of new email addresses.
 */
void addrbook_update_address_list(AddressBookFile *book, ItemPerson *person, 
                                  GList *listEMail)
{
        GList *node;
        GList *listDelete;
        GList *listGroup;

        cm_return_if_fail(book != NULL);
        cm_return_if_fail(person != NULL);

        /* Get groups where person's existing email addresses are listed */
        listGroup = addrcache_get_group_for_person(book->addressCache, person);
        if (listGroup) {
                GHashTable *hashEMail;
                GHashTable *hashEMailAlias;
                GList *nodeGrp;

                /* Load hash table with new address entries */
                hashEMail = g_hash_table_new(g_str_hash, g_str_equal);
                hashEMailAlias = g_hash_table_new(g_str_hash, g_str_equal);
                node = listEMail;
                while (node) {
                        ItemEMail *email = node->data;
                        gchar *alias = email->obj.name ;
                        gchar *addr = g_utf8_strdown(email->address, -1);
                        if (!g_hash_table_lookup(hashEMail, addr)) {
                                g_hash_table_insert(hashEMail, addr, email);
                        }
                        if (*alias != '\0' && ! g_hash_table_lookup(hashEMailAlias,
                            alias)) 
                                g_hash_table_insert(hashEMailAlias, alias, email);

                        node = g_list_next(node);
                }

                /* Re-parent new addresses to existing groups, where email address match. */
                nodeGrp = listGroup;
                while (nodeGrp) {
                        ItemGroup *group = (ItemGroup *) nodeGrp->data;
                        GList *groupEMail = group->listEMail;
                        GList *nodeGrpEM;
                        GList *listRemove = NULL;

                        /* Process each email item linked to group */
                        nodeGrpEM = groupEMail;
                        while (nodeGrpEM) {
                                ItemEMail *emailGrp = (ItemEMail *) nodeGrpEM->data;

                                if (ADDRITEM_PARENT(emailGrp) == ADDRITEM_OBJECT(person)) {
                                        /* Found an email address for this person */
                                        ItemEMail *emailNew = NULL;
                                        gchar *alias = emailGrp->obj.name;
                                        gchar *addr = g_utf8_strdown(emailGrp->address, -1);
                                        emailNew = (ItemEMail *)
                                                g_hash_table_lookup(hashEMail, addr);
                                        g_free( addr );
                                        /* If no match by e-mail, try to match by e-mail alias */
                                        if (!emailNew && *alias != '\0') {
                                                emailNew = (ItemEMail *)
                                                        g_hash_table_lookup(hashEMailAlias, alias);
                                        }
                                        
                                        if (emailNew)
                                                /* Point to this entry */
                                                nodeGrpEM->data = emailNew;
                                        else if (g_hash_table_size(hashEMail)==1)
                                                /* If the person has just one e-mail address, then 
                                                   change e-mail address in group list */
                                                nodeGrpEM->data = listEMail->data;
                                        else 
                                                /* Mark for removal */
                                                listRemove = g_list_append(listRemove, emailGrp);
                                }
                                /* Move on to next email link */
                                nodeGrpEM = g_list_next(nodeGrpEM);
                        }

                        /* Process all removed links in current group */
                        nodeGrpEM = listRemove;
                        while (nodeGrpEM) {
                                ItemEMail *emailGrp = nodeGrpEM->data;
                                groupEMail = g_list_remove(groupEMail, emailGrp);
                                nodeGrpEM = g_list_next(nodeGrpEM);
                        }

                        g_list_free(listRemove);

                        /* Move on to next group */
                        nodeGrp = g_list_next(nodeGrp);

                }
                /* Clear hash table */
                g_hash_table_foreach_remove(hashEMail, (GHRFunc) 
                                            addrbook_free_simple_hash_vis, NULL);
                g_hash_table_destroy(hashEMail);
                hashEMail = NULL;
                g_hash_table_destroy(hashEMailAlias);
                hashEMailAlias = NULL;
                g_list_free(listGroup);
                listGroup = NULL;
        }
        /* Remove old addresses from person and cache */
        listDelete = NULL;
        node = person->listEMail;
        while (node) {
                ItemEMail *email = node->data;

                if (addrcache_person_remove_email(book->addressCache, person, email))
                        addrcache_remove_email(book->addressCache, email);

                listDelete = g_list_append(listDelete, email);
                node = person->listEMail;
        }
        /* Add new address entries */
        node = listEMail;
        while (node) {
                ItemEMail *email = node->data;

                if (ADDRITEM_ID(email) == NULL)
                        /* Allocate an ID for new address */
                        addrcache_id_email(book->addressCache, email);
                        
                addrcache_person_add_email( book->addressCache, person, email );
                node = g_list_next( node );
        }

        addrcache_set_dirty(book->addressCache, TRUE);

        /* Free up memory */
        g_list_free(listEMail);
        listEMail = NULL;

        node = listDelete;
        while (node) {
                ItemEMail *email = node->data;

                addritem_free_item_email(email);
                node = g_list_next(node);
        }
        g_list_free(listDelete);
        listDelete = NULL;

}

/**
 * Create person object and add person with specified address data to address
 * book. Note: A new person is created with specified list of email addresses.
 * All objects inserted into address book.
 *
 * \param  book      Address book.
 * \param  folder    Parent folder where to add person, or <i>NULL</i> for
 *                   root folder.
 * \param  listEMail List of new email addresses to associate with person.
 * \return Person object created.
 */
ItemPerson *addrbook_add_address_list(AddressBookFile *book, ItemFolder *folder,
                                      GList *listEMail)
{
        ItemPerson *person;
        ItemFolder *f = folder;
        GList *node;

        cm_return_val_if_fail(book != NULL, NULL);

        if (!f) 
                f = book->addressCache->rootFolder;
        person = addritem_create_item_person();
        addrcache_id_person(book->addressCache, person);
        addrcache_folder_add_person(book->addressCache, f, person);

        node = listEMail;
        while (node) {
                ItemEMail *email = node->data;
                if (ADDRITEM_ID(email) == NULL)
                        addrcache_id_email(book->addressCache, email);

                addrcache_person_add_email(book->addressCache, person, email);
                node = g_list_next(node);
        }
        return person;
}

/**
 * Build available email list visitor function.
 * \param  key   Table key.
 * \param  value Value stored in table.
 * \param  data  Reference to address book.
 */
static void addrbook_build_avail_email_vis(gpointer key, gpointer value, 
                                           gpointer data)
{
        AddrItemObject *obj = (AddrItemObject *) value;

        if (ADDRITEM_TYPE(obj) == ITEMTYPE_PERSON) {
                AddressBookFile *book = data;
                ItemPerson *person = (ItemPerson *) obj;
                GList *node = person->listEMail;
                while (node) {
                        ItemEMail *email = node->data;
                        /* gchar *newKey = g_strdup( ADDRITEM_ID(email) ); */

                        if (!g_hash_table_lookup(book->tempHash,
                                                 ADDRITEM_ID(email)))
                                book->tempList = g_list_append(book->tempList, email);

                        node = g_list_next(node);
                }
        }
}

/**
 * Return link list of available email items that have not already been linked
 * to groups. Note that the list contains references to items and should be
 * <code>g_list_free()</code> when done. Do <b>*NOT*</b> attempt to used the
 * <code>addrbook_free_xxx()<code> functions... this will destroy the
 * addressbook data!
 *
 * \param  book  Address book.
 * \param  group Group to process.
 * \return List of items, or <i>NULL</i> if none.
 */
GList *addrbook_get_available_email_list(AddressBookFile *book, ItemGroup *group)
{
        GList *list = NULL;
        GHashTable *table;

        cm_return_val_if_fail(book != NULL, NULL);

        /* Load hash table with group email entries */
        table = g_hash_table_new(g_str_hash, g_str_equal);
        if (group) {
                list = group->listEMail;
                while (list) {
                        ItemEMail *email = list->data;
                        g_hash_table_insert(table, ADDRITEM_ID(email), email);
                        list = g_list_next(list);
                }
        }

        /* Build list of available email addresses which exclude those already in groups */
        book->tempList = NULL;
        book->tempHash = table;
        g_hash_table_foreach(book->addressCache->itemHash, 
                             addrbook_build_avail_email_vis, book);
        list = book->tempList;
        book->tempList = NULL;
        book->tempHash = NULL;

        /* Clear hash table */
        g_hash_table_destroy(table);
        table = NULL;

        return list;
}

/**
 * Update address book email list for specified group. Note: The existing email
 * addresses are replaced with the new addresses. Any references to old addresses
 * in the groups are re-linked to the new addresses. All old addresses linked to
 * the person are removed.
 *
 * \param book      Address book.
 * \param group     Group to process.
 * \param listEMail List of email items. This should <b>*NOT*</b> be
 *                  <code>g_free()</code> when done.
 */
void addrbook_update_group_list(AddressBookFile *book, ItemGroup *group, 
                                GList *listEMail)
{
        GList *oldData;

        cm_return_if_fail(book != NULL);
        cm_return_if_fail(group != NULL);

        addrcache_set_dirty(book->addressCache, TRUE);

        /* Remember old list */
        oldData = group->listEMail;
        group->listEMail = listEMail;
        g_list_free(oldData);
}

/**
 * Create group object and add with specifed list of email addresses to
 * address book. Note: The existing email addresses are replaced with the new
 * addresses. Any references to old addresses in the groups are re-linked to
 * the new addresses. All old addresses linked to the person are removed.
 *
 * \param  book      Address book.
 * \param  folder    Parent folder where to add group, or <i>NULL</i> for
 *                   root folder.
 * \param  listEMail List of email items. This should <b>*NOT*</b> be
 *                  <code>g_free()</code> when done.
 * \return Group object created.
 */
ItemGroup *addrbook_add_group_list(AddressBookFile *book, ItemFolder *folder,
                                   GList *listEMail)
{
        ItemGroup *group = NULL;
        ItemFolder *f = folder;

        cm_return_val_if_fail(book != NULL, NULL);

        if (!f)
                f = book->addressCache->rootFolder;
        group = addritem_create_item_group();
        addrcache_id_group(book->addressCache, group);
        addrcache_folder_add_group(book->addressCache, f, group);
        group->listEMail = listEMail;
        return group;
}

/**
 * Create a new folder and add to address book.
 * \param  book   Address book.
 * \param  folder Parent folder where to add folder, or <i>NULL</i> for
 *                root folder.
 * \return Folder that was created. This should <b>*NOT*</b> be
 *         <code>g_free()</code> when done.
 */
ItemFolder *addrbook_add_new_folder(AddressBookFile *book, ItemFolder *parent)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_add_new_folder( book->addressCache, parent );
}

/**
 * Update address book attribute list for specified person. Note: The existing
 * attributes are replaced with the new addresses. All old attributes linked
 * to the person are removed.
 *
 * \param book       Address book.
 * \param person     Person to receive attributes.
 * \param listAttrib New list of attributes.
 */
void addrbook_update_attrib_list(AddressBookFile *book, ItemPerson *person,
                                 GList *listAttrib)
{
        GList *node;
        GList *oldData;

        cm_return_if_fail(book != NULL);
        cm_return_if_fail(person != NULL);

        /* Remember old list */
        oldData = person->listAttrib;

        /* Attach new address list to person. */
        node = listAttrib;
        while (node) {
                UserAttribute *attrib = node->data;
                if (attrib->uid == NULL) {
                        /* Allocate an ID */
                        addrcache_id_attribute(book->addressCache, attrib);
                }
                node = g_list_next(node);
        }
        person->listAttrib = listAttrib;
        addrcache_set_dirty(book->addressCache, TRUE);

        /* Free up old data */
        addritem_free_list_attribute(oldData);
        oldData = NULL;
}

/**
 * Add attribute data for specified person to address book. Note: Only
 * attributes are inserted into address book.
 * \param book       Address book.
 * \param person     Person to receive attributes.
 * \param listAttrib List of attributes.
 */
void addrbook_add_attrib_list( AddressBookFile *book, ItemPerson *person, GList *listAttrib ) {
        GList *node;

        cm_return_if_fail( book != NULL );
        cm_return_if_fail( person != NULL );

        node = listAttrib;
        while( node ) {
                UserAttribute *attrib = node->data;
                if( attrib->uid == NULL ) {
                        addrcache_id_attribute( book->addressCache, attrib );
                }
                addritem_person_add_attribute( person, attrib );
                node = g_list_next( node );
        }
        addrcache_set_dirty( book->addressCache, TRUE );
}

#define WORK_BUFLEN     1024
#define ADDRBOOK_DIGITS "0123456789"

/**
 * Return list of existing address book files.
 * \param  book Address book.
 * \return List of files (as strings).
 */
GList *addrbook_get_bookfile_list(AddressBookFile *book) {
        gchar *adbookdir;
        GDir *dir;
        const gchar *dir_name;
        GStatBuf statbuf;
        gchar buf[WORK_BUFLEN + 1];
        gchar numbuf[WORK_BUFLEN];
        gint len, lenpre, lensuf, lennum;
        long int val, maxval;
        GList *fileList = NULL;

        cm_return_val_if_fail(book != NULL, NULL);

        if (book->path == NULL || *book->path == '\0') {
                book->retVal = MGU_NO_PATH;
                return NULL;
        }

        strncpy(buf, book->path, WORK_BUFLEN);
        len = strlen(buf);
        if (len > 0) {
                if (buf[len-1] != G_DIR_SEPARATOR) {
                        buf[len] = G_DIR_SEPARATOR;
                        buf[++len] = '\0';
                }
        }

        adbookdir = g_strdup(buf);
        strncat(buf, ADDRBOOK_PREFIX, WORK_BUFLEN - strlen(buf));

        if( ( dir = g_dir_open( adbookdir, 0, NULL ) ) == NULL ) {
                book->retVal = MGU_OPEN_DIRECTORY;
                g_free(adbookdir);
                return NULL;
        }

        lenpre = strlen(ADDRBOOK_PREFIX);
        lensuf = strlen(ADDRBOOK_SUFFIX);
        lennum = FILE_NUMDIGITS + lenpre;
        maxval = -1;

        while( ( dir_name = g_dir_read_name( dir ) ) != NULL ) {
                gchar *endptr = NULL;
                gint i, r;
                gboolean flg;

                strncpy(buf, adbookdir, WORK_BUFLEN);
                strncat(buf, dir_name, WORK_BUFLEN - strlen(buf));
                r = g_stat(buf, &statbuf);
                if (r == 0 && S_ISREG(statbuf.st_mode)) {
                        if (strncmp(
                                dir_name,
                                ADDRBOOK_PREFIX, lenpre) == 0)
                        {
                                if (strncmp(
                                        (dir_name) + lennum,
                                        ADDRBOOK_SUFFIX, lensuf) == 0)
                                {
                                        strncpy(numbuf,
                                                (dir_name) + lenpre,
                                                FILE_NUMDIGITS);
                                        numbuf[FILE_NUMDIGITS] = '\0';
                                        flg = TRUE;
                                        for(i = 0; i < FILE_NUMDIGITS; i++) {
                                                if(!strchr(ADDRBOOK_DIGITS, numbuf[i])) {
                                                        flg = FALSE;
                                                        break;
                                                }
                                        }
                                        if (flg) {
                                                /* Get value */
                                                val = strtol(numbuf, &endptr, 10);
                                                if (endptr  && val > -1) {
                                                        if (val > maxval) maxval = val;
                                                        fileList = g_list_append(
                                                                fileList,
                                                                g_strdup(dir_name));
                                                }
                                        }
                                }
                        }
                }
        }
        g_dir_close( dir );
        g_free(adbookdir);

        book->maxValue = maxval; 
        book->retVal = MGU_SUCCESS;
        return fileList;
}

/**
 * Return file name for specified file number.
 * \param  fileNum File number.
 * \return File name, or <i>NULL</i> if file number too large. Should be
 *         <code>g_free()</code> when done.
 */
gchar *addrbook_gen_new_file_name(gint fileNum) {
        gchar fmt[30];
        gchar buf[WORK_BUFLEN];
        gint n = fileNum;
        long int nmax;

        if (n < 1) 
                n = 1;
        nmax = -1 + (long int) pow(10, FILE_NUMDIGITS);
        if (fileNum > nmax)
                return NULL;
        g_snprintf(fmt, sizeof(fmt), "%%s%%0%dd%%s", FILE_NUMDIGITS);
        g_snprintf(buf, sizeof(buf), fmt, ADDRBOOK_PREFIX, n, ADDRBOOK_SUFFIX);
        return g_strdup(buf);
}

/*
 * **********************************************************************
 * Address book test functions...
 * **********************************************************************
 */

/**
 * Attempt to parse list of email address from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_addr_list( AddressBookFile *book, XMLFile *file )
{
        guint prev_level;
        /* GList *attr; */

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file))
                        longjmp(book->jumper, 1);
                if (file->level < prev_level)
                        return;
                /* attr = xml_get_current_tag_attr(file); */
                /* addrbook_show_attribs( attr ); */
                if (xml_compare_tag(file, AB_ELTAG_ADDRESS))
                        addrbook_chkparse_addr_list(book, file);
        }
}

/**
 * Attempt to parse attributes for person address from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_attribute(AddressBookFile *book, XMLFile *file)
{
        /* GList *attr; */
        /* gchar *element; */

        /* attr = xml_get_current_tag_attr(file); */
        /* addrbook_show_attribs( attr ); */
        /* element = xml_get_element(file); */
        /* g_print( "\t\tattrib value : %s\n", element ); */
}

/**
 * Attempt to parse list of attributes for person address from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_attr_list(AddressBookFile *book, XMLFile *file)
{
        guint prev_level;

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file))
                        longjmp(book->jumper, 1);
                if (file->level < prev_level) 
                        return;
                if (xml_compare_tag(file, AB_ELTAG_ATTRIBUTE)) {
                        addrbook_chkparse_attribute(book, file);
                        addrbook_chkparse_attr_list(book, file);
                }
        }
}

/**
 * Attempt to parse person from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_person(AddressBookFile *book, XMLFile *file)
{
        /* GList *attr; */

        /* attr = xml_get_current_tag_attr(file); */
        /* addrbook_show_attribs( attr ); */
        if (xml_parse_next_tag(file)) /* Consume closing tag */
                longjmp(book->jumper, 1);

        if (xml_compare_tag(file, AB_ELTAG_ADDRESS_LIST))
                addrbook_chkparse_addr_list(book, file);

        if (xml_parse_next_tag(file))   /* Consume closing tag */
                longjmp(book->jumper, 1);

        if (xml_compare_tag(file, AB_ELTAG_ATTRIBUTE_LIST))
                addrbook_chkparse_attr_list(book, file);
}

/**
 * Attempt to parse list of members from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_member_list(AddressBookFile *book, XMLFile *file)
{
        /* GList *attr; */
        guint prev_level;

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file)) 
                        longjmp(book->jumper, 1);

                if (file->level < prev_level)
                        return;
                        
                if (xml_compare_tag(file, AB_ELTAG_MEMBER)) {
                        /* attr = xml_get_current_tag_attr(file); */
                        /* addrbook_show_attribs( attr ); */
                        addrbook_chkparse_member_list(book, file);
                }
                else {
                        /* attr = xml_get_current_tag_attr(file); */
                        /* addrbook_show_attribs( attr ); */
                }
        }
}

/**
 * Attempt to parse group from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_group(AddressBookFile *book, XMLFile *file)
{
        /* GList *attr; */

        /* attr = xml_get_current_tag_attr(file); */
        /* addrbook_show_attribs( attr ); */
        if (xml_parse_next_tag(file))   /* Consume closing tag */
                longjmp(book->jumper, 1);

        if (xml_compare_tag(file, AB_ELTAG_MEMBER_LIST))
                addrbook_chkparse_member_list(book, file);
}

/**
 * Attempt to parse list of folders from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_folder_list(AddressBookFile *book, XMLFile *file)
{
        /* GList *attr; */
        guint prev_level;

        for (;;) {
                prev_level = file->level;
                if (xml_parse_next_tag(file))
                        longjmp(book->jumper, 1);

                if (file->level < prev_level)
                        return;
                        
                if (xml_compare_tag(file, AB_ELTAG_ITEM)) {
                        /* attr = xml_get_current_tag_attr(file); */
                        /* addrbook_show_attribs( attr ); */
                        addrbook_chkparse_folder_list(book, file);
                }
                else {
                        /* attr = xml_get_current_tag_attr(file); */
                        /* addrbook_show_attribs( attr ); */
                }
        }
}

/**
 * Attempt to parse a folder from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static void addrbook_chkparse_folder(AddressBookFile *book, XMLFile *file)
{
        /* GList *attr; */

        /* attr = xml_get_current_tag_attr(file); */
        /* addrbook_show_attribs( attr ); */
        if (xml_parse_next_tag(file))   /* Consume closing tag */
                longjmp(book->jumper, 1);

        if (xml_compare_tag(file, AB_ELTAG_ITEM_LIST))
                addrbook_chkparse_folder_list(book, file);
}

/**
 * Attempt to parse (DOM) tree from file.
 * \param book Address book.
 * \param file XML file handle.
 */
static gboolean addrbook_chkread_tree(AddressBookFile *book, XMLFile *file)
{
        /* GList *attr; */
        gboolean retVal;

        if (xml_get_dtd(file))
                return FALSE;

        if (xml_parse_next_tag(file))
                return FALSE;

        if (!xml_compare_tag(file, AB_ELTAG_ADDRESS_BOOK))
                return FALSE;

        /* attr = xml_get_current_tag_attr(file); */
        /* addrbook_show_attribs( attr ); */

        retVal = TRUE;
        for (;;) {
                if (!file->level) 
                        break;
                /* Get item tag */
                if (xml_parse_next_tag(file))
                        longjmp(book->jumper, 1);
                        
                /* Get next tag (person, group or folder) */
                if (xml_compare_tag(file, AB_ELTAG_PERSON))
                        addrbook_chkparse_person( book, file );
                else if (xml_compare_tag(file, AB_ELTAG_GROUP))
                        addrbook_chkparse_group(book, file);
                else if (xml_compare_tag(file, AB_ELTAG_FOLDER))
                        addrbook_chkparse_folder(book, file);
        }
        return retVal;
}

/**
 * Test address book file by parsing contents.
 * \param  book     Address book.
 * \param  fileName Filename of XML file.
 * \return Status code <i>MGU_SUCCESS</i> if file appears to be valid format.
 */
gint addrbook_test_read_file(AddressBookFile *book, gchar *fileName)
{
        XMLFile *file = NULL;
        gchar *fileSpec = NULL;

        cm_return_val_if_fail(book != NULL, -1);

        fileSpec = g_strconcat(book->path, G_DIR_SEPARATOR_S, fileName, NULL);
        book->retVal = MGU_OPEN_FILE;
        file = xml_open_file(fileSpec);
        g_free(fileSpec);
        if (file) {
                book->retVal = MGU_BAD_FORMAT;
                if (setjmp(book->jumper)) {
                        /* g_print( "Caught Ya!!!\n" ); */
                        xml_close_file(file);
                        return book->retVal;
                }
                if (addrbook_chkread_tree(book, file))
                        book->retVal = MGU_SUCCESS;

                xml_close_file( file );
        }
        return book->retVal;
}

/**
 * Return link list of all persons in address book.  Note that the list
 * contains references to items. Do <b>*NOT*</b> attempt to use the
 * <code>addrbook_free_xxx()</code> functions... this will destroy the
 * addressbook data!
 * \param  book     Address book.
 * \return List of persons, or NULL if none.
 */
GList *addrbook_get_all_persons(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_get_all_persons(book->addressCache);
}

GList *addrbook_get_all_groups(AddressBookFile *book)
{
        cm_return_val_if_fail(book != NULL, NULL);
        return addrcache_get_all_groups(book->addressCache);
}

/**
 * Add person and address data to address book.
 * \param  book    Address book.
 * \param  folder  Folder where to add person, or NULL for root folder.
 * \param  name    Common name.
 * \param  address EMail address.
 * \param  remarks Remarks.
 * \return Person added. Do not <b>*NOT*</b> to use the
 *         <code>addrbook_free_xxx()</code> functions... this will destroy
 *         the address book data.
 */
ItemPerson *addrbook_add_contact(AddressBookFile *book, ItemFolder *folder, 
                                 const gchar *name,const gchar *address, 
                                 const gchar *remarks)
{
        ItemPerson *person;

        cm_return_val_if_fail(book != NULL, NULL);
        person = addrcache_add_contact(
                        book->addressCache, folder, name, address, remarks );
        return person;
}

/**
 * Return file name for next address book file.
 * \param  book Address book.
 * \return File name, or <i>NULL</i> if could not create. This should be
 *         <code>g_free()</code> when done.
 */
gchar *addrbook_guess_next_file(AddressBookFile *book)
{
        gchar *newFile = NULL;
        GList *fileList = NULL;
        gint fileNum = 1;
        fileList = addrbook_get_bookfile_list(book);
        if (fileList)
                fileNum = 1 + book->maxValue;
        
        newFile = addrbook_gen_new_file_name(fileNum);
        g_list_free(fileList);
        fileList = NULL;
        return newFile;
}

void addrbook_delete_book_file(AddressBookFile *book)
{
        gchar *book_path;
        
        if (!book->path || !book->fileName)
                return;
        
        book_path = g_strconcat(book->path, G_DIR_SEPARATOR_S,
                                book->fileName, NULL);
        claws_unlink(book_path);
        g_free(book_path);
}

/*
* End of Source.
*/