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+/*
+ * Calcurse - text-based organizer
+ *
+ * Copyright (c) 2004-2011 calcurse Development Team <misc@calcurse.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer in the documentation and/or other
+ * materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Send your feedback or comments to : misc@calcurse.org
+ * Calcurse home page : http://calcurse.org
+ *
+ */
+
+#include <sys/types.h>
+
+#include "calcurse.h"
+#include "sha1.h"
+
+#define ICALDATEFMT "%Y%m%d"
+#define ICALDATETIMEFMT "%Y%m%dT%H%M%S"
+
+typedef enum {
+ ICAL_VEVENT,
+ ICAL_VTODO,
+ ICAL_TYPES
+} ical_types_e;
+
+typedef enum {
+ UNDEFINED,
+ APPOINTMENT,
+ EVENT
+} ical_vevent_e;
+
+typedef struct {
+ enum recur_type type;
+ int freq;
+ long until;
+ unsigned count;
+} ical_rpt_t;
+
+static void ical_export_header (FILE *);
+static void ical_export_recur_events (FILE *);
+static void ical_export_events (FILE *);
+static void ical_export_recur_apoints (FILE *);
+static void ical_export_apoints (FILE *);
+static void ical_export_todo (FILE *);
+static void ical_export_footer (FILE *);
+
+static char *ical_recur_type[RECUR_TYPES] =
+ { "", "DAILY", "WEEKLY", "MONTHLY", "YEARLY" };
+
+/* iCal alarm notification. */
+static void
+ical_export_valarm (FILE *stream)
+{
+ fputs ("BEGIN:VALARM\n", stream);
+ pthread_mutex_lock (&nbar.mutex);
+ fprintf (stream, "TRIGGER:-P%dS\n", nbar.cntdwn);
+ pthread_mutex_unlock (&nbar.mutex);
+ fputs ("ACTION:DISPLAY\n", stream);
+ fputs ("END:VALARM\n", stream);
+}
+
+/* Export header. */
+static void
+ical_export_header (FILE *stream)
+{
+ fputs ("BEGIN:VCALENDAR\n", stream);
+ fprintf (stream, "PRODID:-//calcurse//NONSGML v%s//EN\n", VERSION);
+ fputs ("VERSION:2.0\n", stream);
+}
+
+/* Export footer. */
+static void
+ical_export_footer (FILE *stream)
+{
+ fputs ("END:VCALENDAR\n", stream);
+}
+
+/* Export recurrent events. */
+static void
+ical_export_recur_events (FILE *stream)
+{
+ llist_item_t *i, *j;
+ char ical_date[BUFSIZ];
+
+ LLIST_FOREACH (&recur_elist, i)
+ {
+ struct recur_event *rev = LLIST_GET_DATA (i);
+ date_sec2date_fmt (rev->day, ICALDATEFMT, ical_date);
+ fputs ("BEGIN:VEVENT\n", stream);
+ fprintf (stream, "DTSTART:%s\n", ical_date);
+ fprintf (stream, "RRULE:FREQ=%s;INTERVAL=%d",
+ ical_recur_type[rev->rpt->type], rev->rpt->freq);
+
+ if (rev->rpt->until != 0)
+ {
+ date_sec2date_fmt (rev->rpt->until, ICALDATEFMT, ical_date);
+ fprintf (stream, ";UNTIL=%s\n", ical_date);
+ }
+ else
+ fputc ('\n', stream);
+
+ if (LLIST_FIRST (&rev->exc))
+ {
+ fputs ("EXDATE:", stream);
+ LLIST_FOREACH (&rev->exc, j)
+ {
+ struct excp *exc = LLIST_GET_DATA (j);
+ date_sec2date_fmt (exc->st, ICALDATEFMT, ical_date);
+ fprintf (stream, "%s", ical_date);
+ if (LLIST_NEXT (j))
+ fputc (',', stream);
+ else
+ fputc ('\n', stream);
+ }
+ }
+
+ fprintf (stream, "SUMMARY:%s\n", rev->mesg);
+ fputs ("END:VEVENT\n", stream);
+ }
+}
+
+/* Export events. */
+static void
+ical_export_events (FILE *stream)
+{
+ llist_item_t *i;
+ char ical_date[BUFSIZ];
+
+ LLIST_FOREACH (&eventlist, i)
+ {
+ struct event *ev = LLIST_TS_GET_DATA (i);
+ date_sec2date_fmt (ev->day, ICALDATEFMT, ical_date);
+ fputs ("BEGIN:VEVENT\n", stream);
+ fprintf (stream, "DTSTART:%s\n", ical_date);
+ fprintf (stream, "SUMMARY:%s\n", ev->mesg);
+ fputs ("END:VEVENT\n", stream);
+ }
+}
+
+/* Export recurrent appointments. */
+static void
+ical_export_recur_apoints (FILE *stream)
+{
+ llist_item_t *i, *j;
+ char ical_datetime[BUFSIZ];
+ char ical_date[BUFSIZ];
+
+ LLIST_TS_LOCK (&recur_alist_p);
+ LLIST_TS_FOREACH (&recur_alist_p, i)
+ {
+ struct recur_apoint *rapt = LLIST_TS_GET_DATA (i);
+
+ date_sec2date_fmt (rapt->start, ICALDATETIMEFMT, ical_datetime);
+ fputs ("BEGIN:VEVENT\n", stream);
+ fprintf (stream, "DTSTART:%s\n", ical_datetime);
+ fprintf (stream, "DURATION:PT0H0M%ldS\n", rapt->dur);
+ fprintf (stream, "RRULE:FREQ=%s;INTERVAL=%d",
+ ical_recur_type[rapt->rpt->type], rapt->rpt->freq);
+
+ if (rapt->rpt->until != 0)
+ {
+ date_sec2date_fmt (rapt->rpt->until + HOURINSEC, ICALDATEFMT,
+ ical_date);
+ fprintf (stream, ";UNTIL=%s\n", ical_date);
+ }
+ else
+ fputc ('\n', stream);
+
+ if (LLIST_FIRST (&rapt->exc))
+ {
+ fputs ("EXDATE:", stream);
+ LLIST_FOREACH (&rapt->exc, j)
+ {
+ struct excp *exc = LLIST_GET_DATA (j);
+ date_sec2date_fmt (exc->st, ICALDATEFMT, ical_date);
+ fprintf (stream, "%s", ical_date);
+ if (LLIST_NEXT (j))
+ fputc (',', stream);
+ else
+ fputc ('\n', stream);
+ }
+ }
+
+ fprintf (stream, "SUMMARY:%s\n", rapt->mesg);
+ if (rapt->state & APOINT_NOTIFY)
+ ical_export_valarm (stream);
+ fputs ("END:VEVENT\n", stream);
+ }
+ LLIST_TS_UNLOCK (&recur_alist_p);
+}
+
+/* Export appointments. */
+static void
+ical_export_apoints (FILE *stream)
+{
+ llist_item_t *i;
+ char ical_datetime[BUFSIZ];
+
+ LLIST_TS_LOCK (&alist_p);
+ LLIST_TS_FOREACH (&alist_p, i)
+ {
+ struct apoint *apt = LLIST_TS_GET_DATA (i);
+ date_sec2date_fmt (apt->start, ICALDATETIMEFMT, ical_datetime);
+ fputs ("BEGIN:VEVENT\n", stream);
+ fprintf (stream, "DTSTART:%s\n", ical_datetime);
+ fprintf (stream, "DURATION:P%ldDT%ldH%ldM%ldS\n",
+ apt->dur / DAYINSEC,
+ (apt->dur / HOURINSEC) % DAYINHOURS,
+ (apt->dur / MININSEC) % HOURINMIN,
+ apt->dur % MININSEC);
+ fprintf (stream, "SUMMARY:%s\n", apt->mesg);
+ if (apt->state & APOINT_NOTIFY)
+ ical_export_valarm (stream);
+ fputs ("END:VEVENT\n", stream);
+ }
+ LLIST_TS_UNLOCK (&alist_p);
+}
+
+/* Export todo items. */
+static void
+ical_export_todo (FILE *stream)
+{
+ llist_item_t *i;
+
+ LLIST_FOREACH (&todolist, i)
+ {
+ struct todo *todo = LLIST_TS_GET_DATA (i);
+ if (todo->id < 0) /* completed items */
+ continue;
+
+ fputs ("BEGIN:VTODO\n", stream);
+ fprintf (stream, "PRIORITY:%d\n", todo->id);
+ fprintf (stream, "SUMMARY:%s\n", todo->mesg);
+ fputs ("END:VTODO\n", stream);
+ }
+}
+
+/* Print a header to describe import log report format. */
+static void
+ical_log_init (FILE *log, float version)
+{
+ const char *header =
+ "+-------------------------------------------------------------------+\n"
+ "| Calcurse icalendar import log. |\n"
+ "| |\n"
+ "| Items imported from icalendar file, version %1.1f |\n"
+ "| Some items could not be imported, they are described hereafter. |\n"
+ "| The log line format is as follows: |\n"
+ "| |\n"
+ "| TYPE [LINE]: DESCRIPTION |\n"
+ "| |\n"
+ "| where: |\n"
+ "| * TYPE represents the item type ('VEVENT' or 'VTODO') |\n"
+ "| * LINE is the line in the input stream at which this item begins |\n"
+ "| * DESCRIPTION indicates why the item could not be imported |\n"
+ "+-------------------------------------------------------------------+\n\n";
+
+ if (log)
+ fprintf (log, header, version);
+}
+
+/*
+ * Used to build a report of the import process.
+ * The icalendar item for which a problem occurs is mentioned (by giving its
+ * first line inside the icalendar file), together with a message describing the
+ * problem.
+ */
+static void
+ical_log (FILE *log, ical_types_e type, unsigned lineno, char *msg)
+{
+ const char *typestr[ICAL_TYPES] = {"VEVENT", "VTODO"};
+
+ RETURN_IF (type < 0 || type >= ICAL_TYPES, _("unknown ical type"));
+ if (log)
+ fprintf (log, "%s [%d]: %s\n", typestr[type], lineno, msg);
+}
+
+static void
+ical_store_todo (int priority, char *mesg, char *note)
+{
+ todo_add (mesg, priority, note);
+ mem_free (mesg);
+ erase_note (&note);
+}
+
+static void
+ical_store_event (char *mesg, char *note, long day, long end, ical_rpt_t *rpt,
+ llist_t *exc)
+{
+ const int EVENTID = 1;
+
+ if (rpt)
+ {
+ recur_event_new (mesg, note, day, EVENTID, rpt->type, rpt->freq,
+ rpt->until, exc);
+ mem_free (rpt);
+ }
+ else if (end && end != day)
+ {
+ /* Here we have an event that spans over several days. */
+ rpt = mem_malloc (sizeof (ical_rpt_t));
+ rpt->type = RECUR_DAILY;
+ rpt->freq = 1;
+ rpt->count = 0;
+ rpt->until = end;
+ recur_event_new (mesg, note, day, EVENTID, rpt->type, rpt->freq,
+ rpt->until, exc);
+ mem_free (rpt);
+ }
+ else
+ {
+ event_new (mesg, note, day, EVENTID);
+ }
+ mem_free (mesg);
+ erase_note (&note);
+}
+
+static void
+ical_store_apoint (char *mesg, char *note, long start, long dur,
+ ical_rpt_t *rpt, llist_t *exc, int has_alarm)
+{
+ char state = 0L;
+
+ if (has_alarm)
+ state |= APOINT_NOTIFY;
+ if (rpt)
+ {
+ recur_apoint_new (mesg, note, start, dur, state, rpt->type, rpt->freq,
+ rpt->until, exc);
+ mem_free (rpt);
+ }
+ else
+ {
+ apoint_new (mesg, note, start, dur, state);
+ }
+ mem_free (mesg);
+ erase_note (&note);
+}
+
+/*
+ * Returns an allocated string representing the string given in argument once
+ * unformatted.
+ *
+ * Note:
+ * Even if the RFC2445 recommends not to have more than 75 octets on one line of
+ * text, I prefer not to restrict the parsing to this size, thus I use a buffer
+ * of size BUFSIZ.
+ *
+ * Extract from RFC2445:
+ * Lines of text SHOULD NOT be longer than 75 octets, excluding the line
+ * break.
+ */
+static char *
+ical_unformat_line (char *line)
+{
+ char *p, uline[BUFSIZ];
+ int len;
+
+ if (strlen (line) >= BUFSIZ)
+ return NULL;
+
+ bzero (uline, BUFSIZ);
+ for (len = 0, p = line; *p; p++)
+ {
+ switch (*p)
+ {
+ case '\\':
+ switch (*(p + 1))
+ {
+ case 'n':
+ uline[len++] = '\n';
+ p++;
+ break;
+ case 't':
+ uline[len++] = '\t';
+ p++;
+ break;
+ case ';':
+ case ':':
+ case ',':
+ uline[len++] = *(p + 1);
+ p++;
+ break;
+ default:
+ uline[len++] = *p;
+ break;
+ }
+ break;
+ default:
+ uline[len++] = *p;
+ break;
+ }
+ }
+
+ return mem_strdup (uline);
+}
+
+static void
+ical_readline_init (FILE *fdi, char *buf, char *lstore, unsigned *ln)
+{
+ char *eol;
+
+ *buf = *lstore = '\0';
+ fgets (lstore, BUFSIZ, fdi);
+ if ((eol = strchr(lstore, '\n')) != NULL)
+ *eol = '\0';
+ (*ln)++;
+}
+
+static int
+ical_readline (FILE *fdi, char *buf, char *lstore, unsigned *ln)
+{
+ char *eol;
+
+ strncpy (buf, lstore, BUFSIZ);
+ (*ln)++;
+
+ while (fgets (lstore, BUFSIZ, fdi) != NULL)
+ {
+ if ((eol = strchr(lstore, '\n')) != NULL)
+ *eol = '\0';
+ if (*lstore != SPACE && *lstore != TAB)
+ break;
+ strncat (buf, lstore + 1, BUFSIZ);
+ buf[BUFSIZ - 1] = '\0';
+ (*ln)++;
+ }
+
+ if (feof (fdi))
+ {
+ *lstore = '\0';
+ if (*buf == '\0')
+ return 0;
+ }
+
+ return 1;
+}
+
+static float
+ical_chk_header (FILE *fd, char *buf, char *lstore, unsigned *lineno)
+{
+ const int HEADER_MALFORMED = -1;
+ const struct string icalheader = STRING_BUILD ("BEGIN:VCALENDAR");
+ float version;
+
+ if (!ical_readline (fd, buf, lstore, lineno))
+ return HEADER_MALFORMED;
+
+ str_toupper (buf);
+ if (strncmp (buf, icalheader.str, icalheader.len) != 0)
+ return HEADER_MALFORMED;
+
+ while (!sscanf (buf, "VERSION:%f", &version))
+ {
+ if (!ical_readline (fd, buf, lstore, lineno))
+ return HEADER_MALFORMED;
+ }
+ return version;
+}
+
+/*
+ * iCalendar date-time format is based on the ISO 8601 complete
+ * representation. It should be something like : DATE 'T' TIME
+ * where DATE is 'YYYYMMDD' and TIME is 'HHMMSS'.
+ * The time and 'T' separator are optional (in the case of an day-long event).
+ *
+ * Optionnaly, if the type pointer is given, specify if it is an event
+ * (no time is given, meaning it is an all-day event), or an appointment
+ * (time is given).
+ *
+ * The timezone is not yet handled by calcurse.
+ */
+static long
+ical_datetime2long (char *datestr, ical_vevent_e *type)
+{
+ const int NOTFOUND = 0, FORMAT_DATE = 3, FORMAT_DATETIME = 5;
+ struct date date;
+ unsigned hour, min;
+ long datelong;
+ int format;
+
+ format = sscanf (datestr, "%04u%02u%02uT%02u%02u",
+ &date.yyyy, &date.mm, &date.dd, &hour, &min);
+ if (format == FORMAT_DATE)
+ {
+ if (type)
+ *type = EVENT;
+ datelong = date2sec (date, 0, 0);
+ }
+ else if (format == FORMAT_DATETIME)
+ {
+ if (type)
+ *type = APPOINTMENT;
+ datelong = date2sec (date, hour, min);
+ }
+ else
+ {
+ datelong = NOTFOUND;
+ }
+ return datelong;
+}
+
+static long
+ical_durtime2long (char *timestr)
+{
+ long timelong;
+ char *p;
+
+ if ((p = strchr (timestr, 'T')) == NULL)
+ timelong = 0;
+ else
+ {
+ int nbmatch;
+ struct {
+ unsigned hour, min, sec;
+ } time;
+
+ p++;
+ bzero (&time, sizeof time);
+ nbmatch = sscanf (p, "%uH%uM%uS", &time.hour, &time.min, &time.sec);
+ if (nbmatch < 1 || nbmatch > 3)
+ timelong = 0;
+ else
+ timelong = time.hour * HOURINSEC + time.min * MININSEC + time.sec;
+ }
+ return timelong;
+}
+
+/*
+ * Extract from RFC2445:
+ *
+ * Value Name: DURATION
+ *
+ * Purpose: This value type is used to identify properties that contain
+ * duration of time.
+ *
+ * Formal Definition: The value type is defined by the following
+ * notation:
+ *
+ * dur-value = (["+"] / "-") "P" (dur-date / dur-time / dur-week)
+ * dur-date = dur-day [dur-time]
+ * dur-time = "T" (dur-hour / dur-minute / dur-second)
+ * dur-week = 1*DIGIT "W"
+ * dur-hour = 1*DIGIT "H" [dur-minute]
+ * dur-minute = 1*DIGIT "M" [dur-second]
+ * dur-second = 1*DIGIT "S"
+ * dur-day = 1*DIGIT "D"
+ *
+ * Example: A duration of 15 days, 5 hours and 20 seconds would be:
+ * P15DT5H0M20S
+ * A duration of 7 weeks would be:
+ * P7W
+ */
+static long
+ical_dur2long (char *durstr)
+{
+ const int NOTFOUND = -1;
+ long durlong;
+ char *p;
+ struct {
+ unsigned week, day;
+ } date;
+
+ bzero (&date, sizeof date);
+ if ((p = strchr (durstr, 'P')) == NULL)
+ durlong = NOTFOUND;
+ else
+ {
+ p++;
+ if (*p == '-')
+ return NOTFOUND;
+ else if (*p == '+')
+ p++;
+
+ if (*p == 'T') /* dur-time */
+ durlong = ical_durtime2long (p);
+ else if (strchr (p, 'W')) /* dur-week */
+ {
+ if (sscanf (p, "%u", &date.week) == 1)
+ durlong = date.week * WEEKINDAYS * DAYINSEC;
+ else
+ durlong = NOTFOUND;
+ }
+ else
+ {
+ if (strchr (p, 'D')) /* dur-date */
+ {
+ if (sscanf (p, "%uD", &date.day) == 1)
+ {
+ durlong = date.day * DAYINSEC;
+ durlong += ical_durtime2long (p);
+ }
+ else
+ durlong = NOTFOUND;
+ }
+ else
+ durlong = NOTFOUND;
+ }
+ }
+ return durlong;
+}
+
+/*
+ * Compute the vevent repetition end date from the repetition count.
+ *
+ * Extract from RFC2445:
+ * The COUNT rule part defines the number of occurrences at which to
+ * range-bound the recurrence. The "DTSTART" property value, if specified,
+ * counts as the first occurrence.
+ */
+static long
+ical_compute_rpt_until (long start, ical_rpt_t *rpt)
+{
+ long until;
+
+ switch (rpt->type)
+ {
+ case RECUR_DAILY:
+ until = date_sec_change (start, 0, rpt->freq * (rpt->count - 1));
+ break;
+ case RECUR_WEEKLY:
+ until = date_sec_change (start, 0,
+ rpt->freq * WEEKINDAYS * (rpt->count - 1));
+ break;
+ case RECUR_MONTHLY:
+ until = date_sec_change (start, rpt->freq * (rpt->count - 1), 0);
+ break;
+ case RECUR_YEARLY:
+ until = date_sec_change (start, rpt->freq * 12 * (rpt->count - 1), 0);
+ break;
+ default:
+ until = 0;
+ break;
+ /* NOTREACHED */
+ }
+ return until;
+}
+
+/*
+ * Read a recurrence rule from an iCalendar RRULE string.
+ *
+ * Value Name: RECUR
+ *
+ * Purpose: This value type is used to identify properties that contain
+ * a recurrence rule specification.
+ *
+ * Formal Definition: The value type is defined by the following
+ * notation:
+ *
+ * recur = "FREQ"=freq *(
+ *
+ * ; either UNTIL or COUNT may appear in a 'recur',
+ * ; but UNTIL and COUNT MUST NOT occur in the same 'recur'
+ *
+ * ( ";" "UNTIL" "=" enddate ) /
+ * ( ";" "COUNT" "=" 1*DIGIT ) /
+ *
+ * ; the rest of these keywords are optional,
+ * ; but MUST NOT occur more than
+ * ; once
+ *
+ * ( ";" "INTERVAL" "=" 1*DIGIT ) /
+ * ( ";" "BYSECOND" "=" byseclist ) /
+ * ( ";" "BYMINUTE" "=" byminlist ) /
+ * ( ";" "BYHOUR" "=" byhrlist ) /
+ * ( ";" "BYDAY" "=" bywdaylist ) /
+ * ( ";" "BYMONTHDAY" "=" bymodaylist ) /
+ * ( ";" "BYYEARDAY" "=" byyrdaylist ) /
+ * ( ";" "BYWEEKNO" "=" bywknolist ) /
+ * ( ";" "BYMONTH" "=" bymolist ) /
+ * ( ";" "BYSETPOS" "=" bysplist ) /
+ * ( ";" "WKST" "=" weekday ) /
+ * ( ";" x-name "=" text )
+ * )
+*/
+static ical_rpt_t *
+ical_read_rrule (FILE *log, char *rrulestr, unsigned *noskipped,
+ const int itemline)
+{
+ const struct string daily = STRING_BUILD ("DAILY");
+ const struct string weekly = STRING_BUILD ("WEEKLY");
+ const struct string monthly = STRING_BUILD ("MONTHLY");
+ const struct string yearly = STRING_BUILD ("YEARLY");
+ const struct string count = STRING_BUILD ("COUNT=");
+ const struct string interv = STRING_BUILD ("INTERVAL=");
+ unsigned interval;
+ ical_rpt_t *rpt;
+ char *p;
+
+ rpt = NULL;
+ if ((p = strchr (rrulestr, ':')) != NULL)
+ {
+ char freqstr[BUFSIZ];
+
+ p++;
+ rpt = mem_malloc (sizeof (ical_rpt_t));
+ bzero (rpt, sizeof (ical_rpt_t));
+ if (sscanf (p, "FREQ=%s", freqstr) != 1)
+ {
+ ical_log (log, ICAL_VEVENT, itemline,
+ _("recurrence frequence not found."));
+ (*noskipped)++;
+ mem_free (rpt);
+ return NULL;
+ }
+ else
+ {
+ if (strncmp (freqstr, daily.str, daily.len) == 0)
+ rpt->type = RECUR_DAILY;
+ else if (strncmp (freqstr, weekly.str, weekly.len) == 0)
+ rpt->type = RECUR_WEEKLY;
+ else if (strncmp (freqstr, monthly.str, monthly.len) == 0)
+ rpt->type = RECUR_MONTHLY;
+ else if (strncmp (freqstr, yearly.str, yearly.len) == 0)
+ rpt->type = RECUR_YEARLY;
+ else
+ {
+ ical_log (log, ICAL_VEVENT, itemline,
+ _("recurrence frequence not recognized."));
+ (*noskipped)++;
+ mem_free (rpt);
+ return NULL;
+ }
+ }
+ /*
+ The UNTIL rule part defines a date-time value which bounds the
+ recurrence rule in an inclusive manner. If not present, and the
+ COUNT rule part is also not present, the RRULE is considered to
+ repeat forever.
+
+ The COUNT rule part defines the number of occurrences at which to
+ range-bound the recurrence. The "DTSTART" property value, if
+ specified, counts as the first occurrence.
+ */
+ if ((p = strstr (rrulestr, "UNTIL")) != NULL)
+ {
+ char *untilstr;
+
+ untilstr = strchr (p, '=');
+ rpt->until = ical_datetime2long (++untilstr, NULL);
+ }
+ else
+ {
+ unsigned cnt;
+ char *countstr;
+
+ if ((countstr = strstr (rrulestr, count.str)) != NULL)
+ {
+ countstr += count.len;
+ if (sscanf (countstr, "%u", &cnt) != 1)
+ {
+ rpt->until = 0;
+ /* endless repetition */
+ }
+ else
+ {
+ rpt->count = cnt;
+ }
+ }
+ else
+ rpt->until = 0;
+ }
+
+ if ((p = strstr (rrulestr, interv.str)) != NULL)
+ {
+ p += interv.len;
+ if (sscanf (p, "%u", &interval) != 1)
+ {
+ rpt->freq = 1;
+ /* default frequence if none specified */
+ }
+ else
+ {
+ rpt->freq = interval;
+ }
+ }
+ else
+ {
+ rpt->freq = 1;
+ }
+ }
+ else
+ {
+ ical_log (log, ICAL_VEVENT, itemline, _("recurrence rule malformed."));
+ (*noskipped)++;
+ }
+ return rpt;
+}
+
+static void
+ical_add_exc (llist_t *exc_head, long date)
+{
+ if (date != 0)
+ {
+ struct excp *exc = mem_malloc (sizeof (struct excp));
+ exc->st = date;
+
+ LLIST_ADD (exc_head, exc);
+ }
+}
+
+/*
+ * This property defines the list of date/time exceptions for a
+ * recurring calendar component.
+ */
+void
+ical_read_exdate (llist_t *exc, FILE *log, char *exstr, unsigned *noskipped,
+ const int itemline)
+{
+ char *p, *q;
+ long date;
+
+ LLIST_INIT (exc);
+ if ((p = strchr (exstr, ':')) != NULL)
+ {
+ p++;
+ while ((q = strchr (p, ',')) != NULL)
+ {
+ char buf[BUFSIZ];
+ const int buflen = q - p;
+
+ strncpy (buf, p, buflen);
+ buf[buflen] = '\0';
+ date = ical_datetime2long (buf, NULL);
+ ical_add_exc (exc, date);
+ p = ++q;
+ }
+ date = ical_datetime2long (p, NULL);
+ ical_add_exc (exc, date);
+ }
+ else
+ {
+ ical_log (log, ICAL_VEVENT, itemline,
+ _("recurrence exception dates malformed."));
+ (*noskipped)++;
+ }
+}
+
+/* Return an allocated string containing the name of the newly created note. */
+static char *
+ical_read_note (char *line, unsigned *noskipped, ical_vevent_e item_type,
+ const int itemline, FILE *log)
+{
+ char *sha1 = mem_malloc (SHA1_DIGESTLEN * 2 + 1);
+ char *p, *notestr, fullnotename[BUFSIZ];
+ FILE *fdo;
+
+ if ((p = strchr (line, ':')) != NULL)
+ {
+ p++;
+ notestr = ical_unformat_line (p);
+ if (notestr == NULL)
+ {
+ ical_log (log, item_type, itemline,
+ _("could not get entire item description."));
+ (*noskipped)++;
+ return NULL;
+ }
+ else if (strlen (notestr) == 0)
+ {
+ mem_free (notestr);
+ return NULL;
+ }
+ else
+ {
+ sha1_digest (notestr, sha1);
+ snprintf (fullnotename, BUFSIZ, "%s%s", path_notes, sha1);
+ fdo = fopen (fullnotename, "w");
+ EXIT_IF (fdo == NULL, _("Warning: could not open %s, Aborting..."),
+ fullnotename);
+ fprintf (fdo, "%s", notestr);
+ file_close (fdo, __FILE_POS__);
+ mem_free (notestr);
+ return sha1;
+ }
+ }
+ else
+ {
+ ical_log (log, item_type, itemline, _("description malformed."));
+ (*noskipped)++;
+ return NULL;
+ }
+}
+
+/* Returns an allocated string containing the ical item summary. */
+static char *
+ical_read_summary (char *line)
+{
+ char *p, *summary;
+
+ if ((p = strchr (line, ':')) != NULL)
+ {
+ p++;
+ summary = ical_unformat_line (p);
+ return summary;
+ }
+ else
+ return NULL;
+}
+
+static void
+ical_read_event (FILE *fdi, FILE *log, unsigned *noevents, unsigned *noapoints,
+ unsigned *noskipped, char *buf, char *lstore,
+ unsigned *lineno)
+{
+ const int ITEMLINE = *lineno;
+ const struct string endevent = STRING_BUILD ("END:VEVENT");
+ const struct string summary = STRING_BUILD ("SUMMARY");
+ const struct string dtstart = STRING_BUILD ("DTSTART");
+ const struct string dtend = STRING_BUILD ("DTEND");
+ const struct string duration = STRING_BUILD ("DURATION");
+ const struct string rrule = STRING_BUILD ("RRULE");
+ const struct string exdate = STRING_BUILD ("EXDATE");
+ const struct string alarm = STRING_BUILD ("BEGIN:VALARM");
+ const struct string endalarm = STRING_BUILD ("END:VALARM");
+ const struct string desc = STRING_BUILD ("DESCRIPTION");
+ ical_vevent_e vevent_type;
+ char *p, buf_upper[BUFSIZ];
+ struct {
+ llist_t exc;
+ ical_rpt_t *rpt;
+ char *mesg, *note;
+ long start, end, dur;
+ int has_alarm;
+ } vevent;
+ int skip_alarm;
+
+ vevent_type = UNDEFINED;
+ bzero (&vevent, sizeof vevent);
+ skip_alarm = 0;
+ while (ical_readline (fdi, buf, lstore, lineno))
+ {
+ strncpy (buf_upper, buf, BUFSIZ);
+ buf_upper[BUFSIZ - 1] = '\0';
+ str_toupper (buf_upper);
+
+ if (skip_alarm)
+ {
+ /* Need to skip VALARM properties because some keywords could
+ interfere, such as DURATION, SUMMARY,.. */
+ if (strncmp (buf_upper, endalarm.str, endalarm.len) == 0)
+ skip_alarm = 0;
+ continue;
+ }
+ if (strncmp (buf_upper, endevent.str, endevent.len) == 0)
+ {
+ if (vevent.mesg)
+ {
+ if (vevent.rpt && vevent.rpt->count)
+ vevent.rpt->until = ical_compute_rpt_until (vevent.start,
+ vevent.rpt);
+
+ switch (vevent_type)
+ {
+ case APPOINTMENT:
+ if (vevent.start == 0)
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("appointment has no start time."));
+ goto cleanup;
+ }
+ if (vevent.dur == 0)
+ {
+ if (vevent.end == 0)
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("could not compute duration "
+ "(no end time)."));
+ goto cleanup;
+ }
+ else if (vevent.start == vevent.end)
+ {
+ vevent_type = EVENT;
+ vevent.end = 0L;
+ ical_store_event (vevent.mesg, vevent.note,
+ vevent.start, vevent.end,
+ vevent.rpt, &vevent.exc);
+ (*noevents)++;
+ return;
+ }
+ else
+ {
+ vevent.dur = vevent.end - vevent.start;
+ if (vevent.dur < 0)
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("item has a negative duration."));
+ goto cleanup;
+ }
+ }
+ }
+ ical_store_apoint (vevent.mesg, vevent.note, vevent.start,
+ vevent.dur, vevent.rpt, &vevent.exc,
+ vevent.has_alarm);
+ (*noapoints)++;
+ break;
+ case EVENT:
+ if (vevent.start == 0)
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("event date is not defined."));
+ goto cleanup;
+ }
+ ical_store_event (vevent.mesg, vevent.note, vevent.start,
+ vevent.end, vevent.rpt, &vevent.exc);
+ (*noevents)++;
+ break;
+ case UNDEFINED:
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("item could not be identified."));
+ goto cleanup;
+ break;
+ }
+ }
+ else
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("could not retrieve item summary."));
+ goto cleanup;
+ }
+ return;
+ }
+ else
+ {
+ if (strncmp (buf_upper, dtstart.str, dtstart.len) == 0)
+ {
+ if ((p = strchr (buf, ':')) != NULL)
+ vevent.start = ical_datetime2long (++p, &vevent_type);
+ if (!vevent.start)
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("could not retrieve event start time."));
+ goto cleanup;
+ }
+ }
+ else if (strncmp (buf_upper, dtend.str, dtend.len) == 0)
+ {
+ if ((p = strchr (buf, ':')) != NULL)
+ vevent.end = ical_datetime2long (++p, &vevent_type);
+ if (!vevent.end)
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("could not retrieve event end time."));
+ goto cleanup;
+ }
+ }
+ else if (strncmp (buf_upper, duration.str, duration.len) == 0)
+ {
+ if ((vevent.dur = ical_dur2long (buf)) <= 0)
+ {
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("item duration malformed."));
+ goto cleanup;
+ }
+ }
+ else if (strncmp (buf_upper, rrule.str, rrule.len) == 0)
+ {
+ vevent.rpt = ical_read_rrule (log, buf, noskipped, ITEMLINE);
+ }
+ else if (strncmp (buf_upper, exdate.str, exdate.len) == 0)
+ {
+ ical_read_exdate (&vevent.exc, log, buf, noskipped, ITEMLINE);
+ }
+ else if (strncmp (buf_upper, summary.str, summary.len) == 0)
+ {
+ vevent.mesg = ical_read_summary (buf);
+ }
+ else if (strncmp (buf_upper, alarm.str, alarm.len) == 0)
+ {
+ skip_alarm = 1;
+ vevent.has_alarm = 1;
+ }
+ else if (strncmp (buf_upper, desc.str, desc.len) == 0)
+ {
+ vevent.note = ical_read_note (buf, noskipped, ICAL_VEVENT,
+ ITEMLINE, log);
+ }
+ }
+ }
+ ical_log (log, ICAL_VEVENT, ITEMLINE,
+ _("The ical file seems to be malformed. "
+ "The end of item was not found."));
+
+cleanup:
+
+ if (vevent.note)
+ mem_free (vevent.note);
+ if (vevent.mesg)
+ mem_free (vevent.mesg);
+ if (vevent.rpt)
+ mem_free (vevent.rpt);
+ LLIST_FREE (&vevent.exc);
+ (*noskipped)++;
+}
+
+static void
+ical_read_todo (FILE *fdi, FILE *log, unsigned *notodos, unsigned *noskipped,
+ char *buf, char *lstore, unsigned *lineno)
+{
+ const struct string endtodo = STRING_BUILD ("END:VTODO");
+ const struct string summary = STRING_BUILD ("SUMMARY");
+ const struct string alarm = STRING_BUILD ("BEGIN:VALARM");
+ const struct string endalarm = STRING_BUILD ("END:VALARM");
+ const struct string desc = STRING_BUILD ("DESCRIPTION");
+ const int LOWEST = 9;
+ const int ITEMLINE = *lineno;
+ char buf_upper[BUFSIZ];
+ struct {
+ char *mesg, *note;
+ int has_priority, priority;
+ } vtodo;
+ int skip_alarm;
+
+ bzero (&vtodo, sizeof vtodo);
+ skip_alarm = 0;
+ while (ical_readline (fdi, buf, lstore, lineno))
+ {
+ strncpy (buf_upper, buf, BUFSIZ);
+ buf_upper[BUFSIZ - 1] = '\0';
+ str_toupper (buf_upper);
+ if (skip_alarm)
+ {
+ /* Need to skip VALARM properties because some keywords could
+ interfere, such as DURATION, SUMMARY,.. */
+ if (strncmp (buf_upper, endalarm.str, endalarm.len) == 0)
+ skip_alarm = 0;
+ continue;
+ }
+ if (strncmp (buf_upper, endtodo.str, endtodo.len) == 0)
+ {
+ if (!vtodo.has_priority)
+ vtodo.priority = LOWEST;
+ if (vtodo.mesg)
+ {
+ ical_store_todo (vtodo.priority, vtodo.mesg, vtodo.note);
+ (*notodos)++;
+ }
+ else
+ {
+ ical_log (log, ICAL_VTODO, ITEMLINE,
+ _("could not retrieve item summary."));
+ goto cleanup;
+ }
+ return;
+ }
+ else
+ {
+ int tmpint;
+
+ if (sscanf (buf_upper, "PRIORITY:%d", &tmpint) == 1)
+ {
+ if (tmpint <= 9 && tmpint >= 1)
+ {
+ vtodo.priority = tmpint;
+ vtodo.has_priority = 1;
+ }
+ else
+ {
+ ical_log (log, ICAL_VTODO, ITEMLINE,
+ _("item priority is not acceptable "
+ "(must be between 1 and 9)."));
+ vtodo.priority = LOWEST;
+ }
+ }
+ else if (strncmp (buf_upper, summary.str, summary.len) == 0)
+ {
+ vtodo.mesg = ical_read_summary (buf);
+ }
+ else if (strncmp (buf_upper, alarm.str, alarm.len) == 0)
+ {
+ skip_alarm = 1;
+ }
+ else if (strncmp (buf_upper, desc.str, desc.len) == 0)
+ {
+ vtodo.note = ical_read_note (buf, noskipped, ICAL_VTODO,
+ ITEMLINE, log);
+ }
+ }
+ }
+ ical_log (log, ICAL_VTODO, ITEMLINE,
+ _("The ical file seems to be malformed. "
+ "The end of item was not found."));
+
+cleanup:
+
+ if (vtodo.note)
+ mem_free (vtodo.note);
+ if (vtodo.mesg)
+ mem_free (vtodo.mesg);
+ (*noskipped)++;
+}
+
+/* Import calcurse data. */
+void
+ical_import_data (FILE *stream, FILE *log, unsigned *events, unsigned *apoints,
+ unsigned *todos, unsigned *lines, unsigned *skipped)
+{
+ const struct string vevent = STRING_BUILD ("BEGIN:VEVENT");
+ const struct string vtodo = STRING_BUILD ("BEGIN:VTODO");
+ char buf[BUFSIZ], lstore[BUFSIZ];
+ float ical_version;
+
+ ical_readline_init (stream, buf, lstore, lines);
+ ical_version = ical_chk_header (stream, buf, lstore, lines);
+ RETURN_IF (ical_version < 0,
+ _("Warning: ical header malformed or wrong version number. "
+ "Aborting..."));
+
+ ical_log_init (log, ical_version);
+
+ while (ical_readline (stream, buf, lstore, lines))
+ {
+ (*lines)++;
+ str_toupper (buf);
+ if (strncmp (buf, vevent.str, vevent.len) == 0)
+ {
+ ical_read_event (stream, log, events, apoints, skipped, buf, lstore,
+ lines);
+ }
+ else if (strncmp (buf, vtodo.str, vtodo.len) == 0)
+ {
+ ical_read_todo (stream, log, todos, skipped, buf, lstore, lines);
+ }
+ }
+}
+
+/* Export calcurse data. */
+void
+ical_export_data (FILE *stream)
+{
+ ical_export_header (stream);
+ ical_export_recur_events (stream);
+ ical_export_events (stream);
+ ical_export_recur_apoints (stream);
+ ical_export_apoints (stream);
+ ical_export_todo (stream);
+ ical_export_footer (stream);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 22:32:04 +0000