From d126696999966ebb2456603b047c3950fa4a4eac Mon Sep 17 00:00:00 2001 From: Lars Henriksen Date: Tue, 3 Nov 2020 19:27:09 +0100 Subject: Make iCal event import independent of property ordering Refactoring of ical.c: properties DTSTART, DTEND, DURATION, RRULE and EXDATE are saved and only processed after encountering END:VEVENT. Adresses Github issue #323, follow-up question. Signed-off-by: Lars Henriksen Signed-off-by: Lukas Fleischer --- src/ical.c | 257 ++++++++++++++++++++++++++++++++----------------------------- 1 file changed, 135 insertions(+), 122 deletions(-) (limited to 'src') diff --git a/src/ical.c b/src/ical.c index 5847b88..d62bb59 100644 --- a/src/ical.c +++ b/src/ical.c @@ -1218,11 +1218,6 @@ ical_read_exdate(llist_t * exc, FILE * log, char *exstr, unsigned *noskipped, time_t t; int n; - if (type == UNDEFINED) { - ical_log(log, ICAL_VEVENT, itemline, - _("need DTSTART to determine event type.")); - goto cleanup; - } if (type != ical_get_type(exstr)) { ical_log(log, ICAL_VEVENT, itemline, _("invalid exception date value type.")); @@ -1346,8 +1341,9 @@ ical_read_event(FILE * fdi, FILE * log, unsigned *noevents, const int ITEMLINE = *lineno - !feof(fdi); ical_vevent_e vevent_type; ical_property_e property; - char *p, *note = NULL, *tmp, *tzid; - struct string s; + char *p, *note, *tzid; + char *dtstart, *dtend, *duration, *rrule; + struct string s, exdate; struct { llist_t exc; struct rpt *rpt; @@ -1357,12 +1353,13 @@ ical_read_event(FILE * fdi, FILE * log, unsigned *noevents, long dur; int has_alarm; } vevent; - int skip_alarm, has_note, separator; + int skip_alarm, has_note, separator, has_exdate; vevent_type = UNDEFINED; memset(&vevent, 0, sizeof vevent); LLIST_INIT(&vevent.exc); - skip_alarm = has_note = separator = 0; + note = dtstart = dtend = duration = rrule = NULL; + skip_alarm = has_note = separator = has_exdate =0; while (ical_readline(fdi, buf, lstore, lineno)) { note = NULL; property = NO_PROPERTY; @@ -1376,16 +1373,108 @@ ical_read_event(FILE * fdi, FILE * log, unsigned *noevents, continue; } if (starts_with_ci(buf, "END:VEVENT")) { - if (!vevent.mesg) { + /* DTSTART and related properties (picked up earlier). */ + if (!dtstart) { ical_log(log, ICAL_VEVENT, ITEMLINE, - _("could not retrieve item summary.")); + _("item start date not defined.")); + goto skip; + } + vevent_type = ical_get_type(dtstart); + if ((tzid = ical_get_tzid(dtstart)) && + vevent_type == APPOINTMENT) { + if (vevent.imp) { + asprintf(&p, "%s, TZID=%s", + vevent.imp, tzid); + mem_free(vevent.imp); + vevent.imp = p; + } else + asprintf(&vevent.imp, "TZID=%s", tzid); + has_note = separator = 1; + } + p = ical_get_value(dtstart); + if (!p) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("malformed start time line.")); + goto skip; + } + vevent.start = ical_datetime2time_t(p, tzid, vevent_type); + if (tzid) + mem_free(tzid); + if (!vevent.start) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("invalid or malformed event " + "start time.")); + goto skip; + } + /* DTEND */ + if (!dtend) + goto duration; + if (vevent_type != ical_get_type(dtend)) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("invalid end time value type.")); + goto skip; + } + tzid = ical_get_tzid(dtend); + p = ical_get_value(dtend); + if (!p) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("malformed end time line.")); + goto skip; + } + vevent.end = ical_datetime2time_t(p, tzid, vevent_type); + if (tzid) + mem_free(tzid); + if (!vevent.end) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("malformed event end time.")); + goto skip; + } + if (vevent.end <= vevent.start) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("end must be later than start.")); + goto skip; + } + duration: + if (!duration) + goto rrule; + if (vevent.end) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("either end or duration.")); + goto skip; + } + p = ical_get_value(duration); + if (!p) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("malformed duration line.")); goto skip; } - if (vevent.start == 0) { + vevent.dur = ical_dur2long(p, vevent_type); + if (!vevent.dur) { ical_log(log, ICAL_VEVENT, ITEMLINE, - _("item start date is not defined.")); + _("invalid duration.")); goto skip; } + rrule: + if (!rrule) + goto exdate; + vevent.rpt = ical_read_rrule(log, rrule, noskipped, + ITEMLINE, vevent_type, vevent.start, + &vevent.count); + if (!vevent.rpt) + goto cleanup; + exdate: + if (!has_exdate) + goto duration_end; + if (!rrule) { + ical_log(log, ICAL_VEVENT, ITEMLINE, + _("exception date, but no recurrence " + "rule.")); + goto skip; + } + if (!ical_read_exdate(&vevent.exc, log, exdate.buf, + noskipped, ITEMLINE, vevent_type)) + goto cleanup; + duration_end: /* An APPOINTMENT must always have a duration. */ if (vevent_type == APPOINTMENT && !vevent.dur) { vevent.dur = vevent.end ? @@ -1402,10 +1491,10 @@ ical_read_event(FILE * fdi, FILE * log, unsigned *noevents, char *md = _("multi-day event changed " "to one-day event"); if (vevent.imp) { - asprintf(&tmp, "%s, %s", + asprintf(&p, "%s, %s", vevent.imp, md); mem_free(vevent.imp); - vevent.imp = tmp; + vevent.imp = p; } else asprintf(&vevent.imp, "%s", md); has_note = separator = 1; @@ -1494,115 +1583,28 @@ ical_read_event(FILE * fdi, FILE * log, unsigned *noevents, } if (starts_with_ci(buf, "DTSTART")) { /* - * DTSTART has a value type: either DATE-TIME (by - * default) or DATE. Properties DTEND, DURATION and - * EXDATE and rrule part UNTIL must agree. - * Assume that DTSTART comes before the others even - * though RFC 5545 allows any order. + * DTSTART has a value type: either DATE-TIME or DATE. * In calcurse DATE-TIME implies an appointment, DATE an * event. + * Properties DTEND, DURATION and EXDATE and rrule part + * UNTIL must match the DTSTART value type. */ - vevent_type = ical_get_type(buf); - if ((tzid = ical_get_tzid(buf)) && - vevent_type == APPOINTMENT) { - /* Add note on TZID. */ - if (vevent.imp) { - asprintf(&tmp, "%s, TZID=%s", - vevent.imp, tzid); - mem_free(vevent.imp); - vevent.imp = tmp; - } else - asprintf(&vevent.imp, "TZID=%s", tzid); - has_note = separator = 1; - } - p = ical_get_value(buf); - if (!p) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("malformed start time line.")); - goto skip; - } - - vevent.start = ical_datetime2time_t(p, tzid, vevent_type); - if (tzid) - mem_free(tzid); - if (!vevent.start) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("invalid or malformed event " - "start time.")); - goto skip; - } + asprintf(&dtstart, "%s", buf); } else if (starts_with_ci(buf, "DTEND")) { - if (vevent.dur) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("either end or duration.")); - goto skip; - } - if (vevent_type == UNDEFINED) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("need DTSTART to determine " - "event type.")); - goto skip; - } - if (vevent_type != ical_get_type(buf)) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("invalid end time value type.")); - goto skip; - } - tzid = ical_get_tzid(buf); - p = ical_get_value(buf); - if (!p) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("malformed end time line.")); - goto skip; - } - - vevent.end = ical_datetime2time_t(p, tzid, vevent_type); - if (tzid) - mem_free(tzid); - if (!vevent.end) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("malformed event end time.")); - goto skip; - } - if (vevent.end <= vevent.start) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("end must be later than start.")); - goto skip; - } + asprintf(&dtend, "%s", buf); } else if (starts_with_ci(buf, "DURATION")) { - if (vevent.end) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("either end or duration.")); - goto skip; - } - if (vevent_type == UNDEFINED) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("need DTSTART to determine " - "event type.")); - goto skip; - } - p = ical_get_value(buf); - if (!p) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("malformed duration line.")); - goto skip; - } - vevent.dur = ical_dur2long(p, vevent_type); - if (!vevent.dur) { - ical_log(log, ICAL_VEVENT, ITEMLINE, - _("invalid duration.")); - goto skip; - } + asprintf(&duration, "%s", buf); } else if (starts_with_ci(buf, "RRULE")) { - vevent.rpt = ical_read_rrule(log, buf, noskipped, - ITEMLINE, vevent_type, vevent.start, - &vevent.count); - if (!vevent.rpt) - goto cleanup; + asprintf(&rrule, "%s", buf); } else if (starts_with_ci(buf, "EXDATE")) { - if (!ical_read_exdate(&vevent.exc, log, buf, noskipped, - ITEMLINE, vevent_type)) - goto cleanup; + if (!has_exdate) { + has_exdate = 1; + string_init(&exdate); + string_catf(&exdate, "%s", buf); + } else { + p = ical_get_value(buf); + string_catf(&exdate, ",%s", p); + } } else if (starts_with_ci(buf, "SUMMARY")) { vevent.mesg = ical_read_summary(buf, noskipped, ICAL_VEVENT, ITEMLINE, log); @@ -1646,10 +1648,10 @@ ical_read_event(FILE * fdi, FILE * log, unsigned *noevents, case COMMENT: /* There may be more than one. */ if (vevent.comm) { - asprintf(&tmp, "%sComment: %s", + asprintf(&p, "%sComment: %s", vevent.comm, note); mem_free(vevent.comm); - vevent.comm = tmp; + vevent.comm = p; } else vevent.comm = note; break; @@ -1663,6 +1665,16 @@ ical_read_event(FILE * fdi, FILE * log, unsigned *noevents, skip: (*noskipped)++; cleanup: + if (dtstart) + mem_free(dtstart); + if (dtend) + mem_free(dtend); + if (duration) + mem_free(duration); + if (rrule) + mem_free(rrule); + if (has_exdate) + mem_free(exdate.buf); if (note) mem_free(note); if (vevent.desc) @@ -1686,7 +1698,7 @@ ical_read_todo(FILE * fdi, FILE * log, unsigned *notodos, unsigned *noskipped, { const int ITEMLINE = *lineno - !feof(fdi); ical_property_e property; - char *note = NULL, *tmp; + char *p, *note; struct string s; struct { char *mesg, *desc, *loc, *comm, *note; @@ -1696,6 +1708,7 @@ ical_read_todo(FILE * fdi, FILE * log, unsigned *notodos, unsigned *noskipped, int skip_alarm, has_note, separator; memset(&vtodo, 0, sizeof vtodo); + note = NULL; skip_alarm = has_note = separator = 0; while (ical_readline(fdi, buf, lstore, lineno)) { note = NULL; @@ -1796,10 +1809,10 @@ ical_read_todo(FILE * fdi, FILE * log, unsigned *notodos, unsigned *noskipped, case COMMENT: /* There may be more than one. */ if (vtodo.comm) { - asprintf(&tmp, "%sComment: %s", + asprintf(&p, "%sComment: %s", vtodo.comm, note); mem_free(vtodo.comm); - vtodo.comm = tmp; + vtodo.comm = p; } else vtodo.comm = note; break; -- cgit v1.2.3-54-g00ecf