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/*
* icalfilter -- filter an iCalendar file
*
* Author: Bert Bos <bert@w3.org>
* Created: 30 Sep 2002
*/
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <getopt.h>
#include <ctype.h>
/*
#include <icaltime.h>
#include <icalcomponent.h>
#include <icalerror.h>
#include <icaltimezone.h>
*/
#include <libical/ical.h>
#include <libical/icalss.h>
/*
#include <icalset.h>
#include <icalfileset.h>
*/
#define PRODID "-//W3C//NONSGML icalfilter 0.1//EN"
#define ERR_OUT_OF_MEM 1 /* Program exit codes */
#define ERR_USAGE 2
#define ERR_DATE 3
#define ERR_PARSE 4
#define ERR_FILEIO 5
#define ERR_ICAL_ERR 6 /* Other error */
#define USAGE "Usage: ical2html [options] input output\n\
-p, --class=CLASS only (PUBLIC, CONFIDENTIAL, PRIVATE, NONE)\n\
-P, --not-class=CLASS exclude (PUBLIC, CONFIDENTIAL, PRIVATE, NONE)\n\
-c, --category=CATEGORY only events of this category\n\
-C, --not-category=CATEGORY exclude events of this category\n\
input and output are iCalendar files\n"
/* Long command line options */
static struct option options[] = {
{"class", 1, 0, 'p'},
{"not-class", 1, 0, 'P'},
{"category", 1, 0, 'c'},
{"not-category", 1, 0, 'C'},
{0, 0, 0, 0}
};
#define OPTIONS "p:P:c:C:"
/* Structure for storing applicable events */
typedef struct _event_item {
struct icaltimetype start;
struct icaltimetype end;
icalcomponent *event;
} event_item;
/* fatal -- print error message and exit with errcode */
static void fatal(int errcode, const char *message,...)
{
va_list args;
va_start(args, message);
vfprintf(stderr, message, args);
va_end(args);
exit(errcode);
}
/* read_stream -- read size bytes into s from stream d */
static char* read_stream(char *s, size_t size, void *d)
{
return fgets(s, size, (FILE*)d);
}
/* main */
int main(int argc, char *argv[])
{
FILE* stream;
icalcomponent *comp;
icalparser *parser;
char *classmask = NULL, *categorymask = NULL;
char *notclassmask = NULL, *notcategorymask = NULL;
char c;
const char *class;
icalset *out;
icalcomponent *h, *next, *newset;
icalproperty *p;
/* We handle errors ourselves */
icalerror_errors_are_fatal = 0;
icalerrno = 0;
/* Read commandline */
while ((c = getopt_long(argc, argv, OPTIONS, options, NULL)) != -1) {
switch (c) {
case 'p': classmask = strdup(optarg); break;
case 'P': notclassmask = strdup(optarg); break;
case 'c': categorymask = strdup(optarg); break;
case 'C': notcategorymask = strdup(optarg); break;
default: fatal(ERR_USAGE, USAGE);
}
}
/* Get input file name */
if (optind == argc) fatal(ERR_USAGE, USAGE);
stream = optind == argc ? stdin : fopen(argv[optind], "r");
if (!stream) fatal(ERR_FILEIO, "%s: %s\n", argv[optind], strerror(errno));
optind++;
/* Get output file name */
if (optind == argc) fatal(ERR_USAGE, USAGE);
(void) unlink(argv[optind]); /* Remove output file if it already exists */
out = icalfileset_new(argv[optind]);
if (!out) fatal(ERR_FILEIO, "%s: %s\n", argv[optind], strerror(errno));
/* Should have no more arguments */
if (optind + 1 != argc) fatal(ERR_USAGE, USAGE);
/* Create a new parser object */
parser = icalparser_new();
/* Tell the parser what input stream it should use */
icalparser_set_gen_data(parser, stream);
/* Let the parser read the file and return all components */
if (! (comp = icalparser_parse(parser, read_stream)))
fatal(ERR_PARSE, "Parse error: %s\n", icalerror_strerror(icalerrno));
icalparser_free(parser);
/* Initialize a new VCALENDAR */
newset = icalcomponent_vanew(ICAL_VCALENDAR_COMPONENT,
icalproperty_new_version("2.0"),
icalproperty_new_prodid(PRODID),
0);
/* Iterate over VEVENTs */
for (h = icalcomponent_get_first_component(comp, ICAL_VEVENT_COMPONENT);
h; h = next) {
next = icalcomponent_get_next_component(comp, ICAL_VEVENT_COMPONENT);
/* Check if the event is of the right class (unless we accept all) */
if (classmask || notclassmask) {
p = icalcomponent_get_first_property(h, ICAL_CLASS_PROPERTY);
class = p ? icalvalue_as_ical_string(icalproperty_get_value(p))
: "NONE";
if (classmask && strcasecmp(classmask, class) != 0) continue;
if (notclassmask && strcasecmp(notclassmask, class) == 0) continue;
}
/* Check if the event is of the right category (unless we accept all) */
if (categorymask) {
p = icalcomponent_get_first_property(h, ICAL_CATEGORIES_PROPERTY);
while (p && strcasecmp(categorymask, icalproperty_get_categories(p)))
p = icalcomponent_get_next_property(h, ICAL_CATEGORIES_PROPERTY);
if (!p) continue; /* No category was equal to categorymask */
}
if (notcategorymask) {
p = icalcomponent_get_first_property(h, ICAL_CATEGORIES_PROPERTY);
while (p && strcasecmp(notcategorymask, icalproperty_get_categories(p)))
p = icalcomponent_get_next_property(h, ICAL_CATEGORIES_PROPERTY);
if (p) continue; /* Some category equal to notcategorymask */
}
/* The event passed our filters, so add it to the output set */
icalcomponent_remove_component(comp, h); /* Move from comp... */
icalcomponent_add_component(newset, h); /* ... to out */
}
/* Put new vcalendar in output file, flush to disk and close file */
icalfileset_add_component(out, newset);
icalfileset_free(out);
/* Clean up */
icalcomponent_free(comp);
return 0;
}
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