[evolution-ews] I#25 - Canceled meetings remain in the calendar with Canceled: title

[Milan Crha <mcrha src gnome org>]

commit c90960ecb922178a12c5765566fc242c8e91dfa3
Author: Milan Crha <mcrha redhat com>
Date:   Thu Jan 10 15:27:47 2019 +0100

    I#25 - Canceled meetings remain in the calendar with Canceled: title
    
    Closes https://gitlab.gnome.org/GNOME/evolution-ews/issues/25

 src/calendar/e-cal-backend-ews.c | 41 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
---
diff --git a/src/calendar/e-cal-backend-ews.c b/src/calendar/e-cal-backend-ews.c
index 20d24a9f..72bf4d41 100644
--- a/src/calendar/e-cal-backend-ews.c
+++ b/src/calendar/e-cal-backend-ews.c
@@ -3606,6 +3606,47 @@ ecb_ews_receive_objects_sync (ECalBackendSync *sync_backend,
                        }
                }
                break;
+       case ICAL_METHOD_CANCEL: {
+               ECalObjModType mod_type = E_CAL_OBJ_MOD_ALL;
+               GSList *ids = NULL;
+
+               for (subcomp = icalcomponent_get_first_component (icalcomp, kind);
+                    subcomp && success;
+                    subcomp = icalcomponent_get_next_component (icalcomp, kind)) {
+                       const gchar *uid = icalcomponent_get_uid (subcomp);
+                       gchar *rid_str = NULL;
+
+                       if (icalcomponent_get_first_property (subcomp, ICAL_RECURRENCEID_PROPERTY)) {
+                               struct icaltimetype rid = icaltime_null_time ();
+
+                               rid = icalcomponent_get_recurrenceid (subcomp);
+
+                               rid_str = (icaltime_is_valid_time (rid) && !icaltime_is_null_time (rid)) ?
+                                       icaltime_as_ical_string_r (rid) : g_strdup ("0");
+
+                               mod_type = E_CAL_OBJ_MOD_THIS;
+                       }
+
+                       ids = g_slist_prepend (ids, e_cal_component_id_new (uid, rid_str));
+
+                       g_free (rid_str);
+               }
+
+               if (ids) {
+                       GSList *old_comps = NULL, *new_comps = NULL;
+                       GError *local_error = NULL;
+
+                       e_cal_backend_sync_remove_objects (sync_backend, cal, cancellable, ids, mod_type, 
&old_comps, &new_comps, &local_error);
+
+                       do_refresh = !local_error;
+
+                       e_util_free_nullable_object_slist (old_comps);
+                       e_util_free_nullable_object_slist (new_comps);
+                       g_clear_error (&local_error);
+               }
+
+               g_slist_free_full (ids, (GDestroyNotify) e_cal_component_free_id);
+               } break;
        default:
                break;
        }