icalcomponent.c: properly handle recurring tasks with only due time, and all-day events wuth no dtend/duration

1 files changed, 12 insertions, 0 deletions

diff --git a/src/libical/icalcomponent.c b/src/libical/icalcomponent.c
index 498d8be1..6439f6f4 100644
--- a/src/libical/icalcomponent.c
+++ b/src/libical/icalcomponent.c
@@ -884,12 +884,24 @@ void icalcomponent_foreach_recurrence(icalcomponent *comp,
 
     dtstart = icalcomponent_get_dtstart(comp);
 
+    if (icaltime_is_null_time(dtstart) &&
+        icalcomponent_isa(comp) == ICAL_VTODO_COMPONENT) {
+        /* VTODO with no DTSTART - use DUE */
+        dtstart = icalcomponent_get_due(comp);
+    }
     if (icaltime_is_null_time(dtstart))
         return;
 
     /* The end time could be specified as either a DTEND or a DURATION */
     /* icalcomponent_get_dtend takes care of these cases. */
     dtend = icalcomponent_get_dtend(comp);
+    if (icaltime_is_null_time(dtend) && icaltime_is_date(dtstart)) {
+        /* No DTEND or DURATION and DTSTART is DATE - duration is 1 day */
+        struct icaldurationtype dur = icaldurationtype_null_duration();
+
+        dur.days = 1;
+        dtend = icaltime_add(dtstart, dur);
+    }
 
     /* Now set up the base span for this item, corresponding to the
        base DTSTART and DTEND */