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/*
 * Evolution calendar - utility functions
 *
 * 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:
 *      Federico Mena-Quintero <federico@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <glib/gi18n.h>
#include <libedataserver/e-time-utils.h>
#include <libecal/e-cal-time-util.h>
#include "config-data.h"
#include "util.h"

/* Converts a time_t to a string, relative to the specified timezone */
char *
timet_to_str_with_zone (time_t t, icaltimezone *zone)
{
    struct icaltimetype itt;
    struct tm tm;
    char buf[256];

    if (t == -1)
        return g_strdup (_("invalid time"));

    itt = icaltime_from_timet_with_zone (t, FALSE, zone);
    tm = icaltimetype_to_tm (&itt);

    e_time_format_date_and_time (&tm, config_data_get_24_hour_format (),
                     FALSE, FALSE, buf, sizeof (buf));
    return g_strdup (buf);
}

char *
calculate_time (time_t start, time_t end)
{
    time_t difference = end - start;
    char *str;
    int   hours, minutes;
    char *times[4];
    char *joined;
    int   i;

        i = 0;
    if (difference >= 3600) {
        hours = difference / 3600;
        difference %= 3600;

        times[i++] = g_strdup_printf (ngettext("%d hour", "%d hours", hours), hours);
    }
    if (difference >= 60) {
        minutes = difference / 60;
        difference %= 60;

        times[i++] = g_strdup_printf (ngettext("%d minute", "%d minutes", minutes), minutes);
    }
    if (i == 0 || difference != 0) {
        /* TRANSLATORS: here, "second" is the time division (like "minute"), not the ordinal number (like "third") */
        times[i++] = g_strdup_printf (ngettext("%d second", "%d seconds", difference), (int)difference);
    }

    times[i] = NULL;
    joined = g_strjoinv (" ", times);
    str = g_strconcat ("(", joined, ")", NULL);
    while (i > 0)
        g_free (times[--i]);
    g_free (joined);

    return str;
}