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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/*
 * eab-util.c
 *
 * Copyright (C) 2001-2003 Ximian, Inc.
 *
 * Authors: Jon Trowbridge <trow@ximian.com>
 *          Chris Toshok <toshok@ximian.com>
 */

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

#include <config.h>
#include "eab-book-util.h"

#include <string.h>
#include <glib.h>
#include <glib-object.h>
#include <e-util/e-config-listener.h>

EConfigListener *
eab_get_config_database ()
{
    static EConfigListener *config_db;

    if (config_db == NULL)
        config_db = e_config_listener_new ();

    return config_db;
}

/*
 *
 * Specialized Queries
 *
 */

guint
eab_name_and_email_query (EBook *book,
              const gchar *name,
              const gchar *email,
              EBookContactsCallback cb,
              gpointer closure)
{
    gchar *email_query=NULL, *name_query=NULL, *query;
    guint tag;

    g_return_val_if_fail (book && E_IS_BOOK (book), 0);
    g_return_val_if_fail (cb != NULL, 0);

    if (name && !*name)
        name = NULL;
    if (email && !*email)
        email = NULL;

    if (name == NULL && email == NULL)
        return 0;

    /* Build our e-mail query.
     * We only query against the username part of the address, to avoid not matching
     * fred@foo.com and fred@mail.foo.com.  While their may be namespace collisions
     * in the usernames of everyone out there, it shouldn't be that bad.  (Famous last words.)
     */
    if (email) {
        const gchar *t = email;
        while (*t && *t != '@')
            ++t;
        if (*t == '@') {
            email_query = g_strdup_printf ("(beginswith \"email\" \"%.*s@\")", t-email, email);

        } else {
            email_query = g_strdup_printf ("(beginswith \"email\" \"%s\")", email);
        }
    }

    /* Build our name query.
     * We only do name-query stuff if we don't have an e-mail address.  Our basic assumption
     * is that the username part of the email is good enough to keep the amount of stuff returned
     * in the query relatively small.
     */
    if (name && !email)
        name_query = g_strdup_printf ("(or (beginswith \"file_as\" \"%s\") (beginswith \"full_name\" \"%s\"))", name, name);

    /* Assemble our e-mail & name queries */
    if (email_query && name_query) {
        query = g_strdup_printf ("(and %s %s)", email_query, name_query);
    } else if (email_query) {
        query = email_query;
        email_query = NULL;
    } else if (name_query) {
        query = name_query;
        name_query = NULL;
    } else
        return 0;

    tag = e_book_async_get_contacts (book, query, cb, closure);

    g_free (email_query);
    g_free (name_query);
    g_free (query);

    return tag;
}

/*
 * Simple nickname query
 */
guint
eab_nickname_query (EBook                 *book,
            const char            *nickname,
            EBookContactsCallback  cb,
            gpointer               closure)
{
    gchar *query;
    guint retval;

    g_return_val_if_fail (E_IS_BOOK (book), 0);
    g_return_val_if_fail (nickname != NULL, 0);

    /* The empty-string case shouldn't generate a warning. */
    if (! *nickname)
        return 0;

    query = g_strdup_printf ("(is \"nickname\" \"%s\")", nickname);

    retval = e_book_async_get_contacts (book, query, cb, closure);

    g_free (query);

    return retval;
}

GList*
eab_contact_list_from_string (const char *str)
{
    GList *contacts = NULL;
    GString *gstr = g_string_new ("");
    char *p = (char*)str;
    char *q;
    char *blank_line;

    while (*p) {
        if (*p != '\r') g_string_append_c (gstr, *p);
        
        p++;
    }

    p = g_string_free (gstr, FALSE);
    q = p;
    do {
        char *temp;

        blank_line = strstr (q, "\n\n");
        if (blank_line) {
            temp = g_strndup (q, blank_line - q);
        }
        else {
            temp = g_strdup (q);
        }

        contacts = g_list_append (contacts, e_contact_new_from_vcard (temp));

        g_free (temp);

        if (blank_line)
            q = blank_line + 2;
        else
            q = NULL;
    } while (blank_line);

    g_free (p);

    return contacts;
}

char*
eab_contact_list_to_string (GList *contacts)
{
    GString *str = g_string_new ("");
    GList *l;

    for (l = contacts; l; l = l->next) {
        EContact *contact = l->data;
        char *vcard_str = e_vcard_to_string (E_VCARD (contact), EVC_FORMAT_VCARD_30);

        g_string_append (str, vcard_str);
        if (l->next)
            g_string_append (str, "\r\n\r\n");
    }

    return g_string_free (str, FALSE);
}

#if notyet
/*
 *  Convenience routine to check for addresses in the local address book.
 */

typedef struct _HaveAddressInfo HaveAddressInfo;
struct _HaveAddressInfo {
    gchar *email;
    EBookHaveAddressCallback cb;
    gpointer closure;
};

static void
have_address_query_cb (EBook *book, EBookSimpleQueryStatus status, const GList *contacts, gpointer closure)
{
    HaveAddressInfo *info = (HaveAddressInfo *) closure;
    
    info->cb (book, 
          info->email,
          contacts && (status == E_BOOK_ERROR_OK) ? E_CONTACT (contacts->data) : NULL,
          info->closure);

    g_free (info->email);
    g_free (info);
}

static void
have_address_book_open_cb (EBook *book, gpointer closure)
{
    HaveAddressInfo *info = (HaveAddressInfo *) closure;

    if (book) {

        e_book_name_and_email_query (book, NULL, info->email, have_address_query_cb, info);

    } else {

        info->cb (NULL, info->email, NULL, info->closure);

        g_free (info->email);
        g_free (info);

    }
}

void
eab_query_address_default (const gchar *email,
               EABHaveAddressCallback cb,
               gpointer closure)
{
    HaveAddressInfo *info;

    g_return_if_fail (email != NULL);
    g_return_if_fail (cb != NULL);

    info = g_new0 (HaveAddressInfo, 1);
    info->email = g_strdup (email);
    info->cb = cb;
    info->closure = closure;

    e_book_use_default_book (have_address_book_open_cb, info);
}
#endif

/* bad place for this i know. */
int
e_utf8_casefold_collate_len (const gchar *str1, const gchar *str2, int len)
{
    gchar *s1 = g_utf8_casefold(str1, len);
    gchar *s2 = g_utf8_casefold(str2, len);
    int rv;

    rv = g_utf8_collate (s1, s2);

    g_free (s1);
    g_free (s2);

    return rv;
}

int
e_utf8_casefold_collate (const gchar *str1, const gchar *str2)
{
    return e_utf8_casefold_collate_len (str1, str2, -1);
}