path: root/calendar/cal-util/test-recur.c

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

/* 
 * Author : 
 *  Damon Chaplin <damon@ximian.com>
 *
 * Copyright 2000, Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

/*
 * This tests the recurrence rule expansion functions.
 *
 * NOTE: currently it starts from the event start date and continues
 * until all recurrence rules/dates end or we reach MAX_OCCURRENCES
 * occurrences. So it does not test generating occurrences for a specific
 * interval. A nice addition might be to do this automatically and compare
 * the results from the complete set to ensure they match.
 */

#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtkmain.h>
#include <cal-util/cal-recur.h>


/* Since events can recur infinitely, we set a limit to the number of
   occurrences we output. */
#define MAX_OCCURRENCES 1000

static void usage           (void);
static icalcomponent* scan_ics_file (char       *filename);
static char* get_line           (char       *s,
                     size_t      size,
                     void       *data);
static void generate_occurrences    (icalcomponent  *comp);
static gboolean occurrence_cb       (CalComponent   *comp,
                     time_t      instance_start,
                     time_t      instance_end,
                     gpointer    data);


int
main            (int         argc,
             char       *argv[])
{
    gchar *filename;
    icalcomponent *icalcomp;

    gtk_init (&argc, &argv);

    if (argc != 2)
        usage ();

    filename = argv[1];

    icalcomp = scan_ics_file (filename);
    if (icalcomp)
        generate_occurrences    (icalcomp);

    return 0;
}


static void
usage           (void)
{
    g_print ("Usage: test-recur <filename>\n");
    exit (1);
}


static icalcomponent*
scan_ics_file       (char       *filename)
{
    FILE *fp;
    icalcomponent *icalcomp;
    icalparser *parser;

    g_print ("Opening file: %s\n", filename);
    fp = fopen (filename, "r");

    if (!fp) {
        g_print ("Can't open file: %s\n", filename);
        return NULL;
    }

    parser = icalparser_new ();
    icalparser_set_gen_data (parser, fp);

    icalcomp = icalparser_parse (parser, get_line);
    icalparser_free (parser);

    return icalcomp;
}


/* Callback used from icalparser_parse() */
static char *
get_line        (char       *s,
             size_t      size,
             void       *data)
{
    return fgets (s, size, (FILE*) data);
}


/* This resolves any TZIDs in the components. The VTIMEZONEs must be in the
   file we are reading. */
static icaltimezone*
resolve_tzid_cb     (const char *tzid,
             gpointer    user_data)
{
    icalcomponent *vcalendar_comp = user_data;

        if (!tzid || !tzid[0])
                return NULL;
        else if (!strcmp (tzid, "UTC"))
                return icaltimezone_get_utc_timezone ();

    return icalcomponent_get_timezone (vcalendar_comp, tzid);
}


static void
generate_occurrences    (icalcomponent  *icalcomp)
{
    icalcompiter iter;
    icaltimezone *default_timezone;

    /* This is the timezone we will use for DATE and floating values. */
    default_timezone = icaltimezone_get_utc_timezone ();

    for (iter = icalcomponent_begin_component (icalcomp, ICAL_ANY_COMPONENT);
         icalcompiter_deref (&iter) != NULL;
         icalcompiter_next (&iter)) {
        icalcomponent *tmp_icalcomp;
        CalComponent *comp;
        icalcomponent_kind kind;
        gint occurrences;

        tmp_icalcomp = icalcompiter_deref (&iter);
        kind = icalcomponent_isa (tmp_icalcomp);

        if (!(kind == ICAL_VEVENT_COMPONENT
              || kind == ICAL_VTODO_COMPONENT
              || kind == ICAL_VJOURNAL_COMPONENT))
            continue;

        comp = cal_component_new ();

        if (!cal_component_set_icalcomponent (comp, tmp_icalcomp))
            continue;

        g_print ("#############################################################################\n");
        g_print ("%s\n\n", icalcomponent_as_ical_string (tmp_icalcomp));
        g_print ("Instances:\n");

        occurrences = 0;
        /* I use specific times when I am trying to pin down a bug seen
           in one of the calendar views. */
#if 0
        cal_recur_generate_instances (comp, 982022400, 982108800,
                          occurrence_cb, &occurrences,
                          resolve_tzid_cb, icalcomp,
                          default_timezone);
#else
        cal_recur_generate_instances (comp, -1, -1,
                          occurrence_cb, &occurrences,
                          resolve_tzid_cb, icalcomp,
                          default_timezone);
#endif

        /* Print the component again so we can see the
           X-EVOLUTION-ENDDATE parameter (only set if COUNT is used).
        */
        g_print ("#############################################################################\n");
#if 0
        g_print ("%s\n\n", icalcomponent_as_ical_string (tmp_icalcomp));
#endif
    }
}


static gboolean
occurrence_cb       (CalComponent   *comp,
             time_t      instance_start,
             time_t      instance_end,
             gpointer    data)
{
    char start[32], finish[32];
    gint *occurrences;

    occurrences = (gint*) data;

    strcpy (start, ctime (&instance_start));
    start[24] = '\0';
    strcpy (finish, ctime (&instance_end));
    finish[24] = '\0';

    g_print ("%s - %s\n", start, finish);

    (*occurrences)++;
    return (*occurrences == MAX_OCCURRENCES) ? FALSE : TRUE;
}