[evolution-ews] I#39 - Let handle recurring task completion by the server

[Milan Crha <mcrha src gnome org>]

commit b61bc6a474fdafb9a720556e39bba2e21dd0ab6c
Author: Milan Crha <mcrha redhat com>
Date:   Mon Mar 11 11:47:45 2019 +0100

    I#39 - Let handle recurring task completion by the server
    
    Closes https://gitlab.gnome.org/GNOME/evolution-ews/issues/39

 src/calendar/e-cal-backend-ews.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/src/calendar/e-cal-backend-ews.c b/src/calendar/e-cal-backend-ews.c
index 9eea63f5..0f415f39 100644
--- a/src/calendar/e-cal-backend-ews.c
+++ b/src/calendar/e-cal-backend-ews.c
@@ -2581,6 +2581,19 @@ ecb_ews_modify_item_sync (ECalBackendEws *cbews,
                g_free (convert_data.user_email);
        }
 
+       if (success && icalcomponent_isa (new_icalcomp) == ICAL_VTODO_COMPONENT &&
+           icalcomponent_count_properties (new_icalcomp, ICAL_RRULE_PROPERTY) > 0) {
+               icalproperty *prop;
+
+               prop = icalcomponent_get_first_property (new_icalcomp, ICAL_STATUS_PROPERTY);
+               if (prop && icalproperty_get_status (prop) == ICAL_STATUS_COMPLETED) {
+                       /* Setting a recurring task completed will mark the existing task
+                          as completed and also add a new task, thus force refresh here,
+                          thus the user sees an up-to-date view of the server content. */
+                       e_cal_meta_backend_schedule_refresh (E_CAL_META_BACKEND (cbews));
+               }
+       }
+
        g_slist_free_full (added_attachments, (GDestroyNotify) e_ews_attachment_info_free);
        g_clear_object (&oldcomp);
        g_clear_object (&comp);
@@ -3855,6 +3868,7 @@ ecb_ews_get_backend_property (ECalBackend *cal_backend,
                        CAL_STATIC_CAPABILITY_TASK_DATE_ONLY,
                        CAL_STATIC_CAPABILITY_TASK_NO_ALARM,
                        CAL_STATIC_CAPABILITY_TASK_CAN_RECUR,
+                       CAL_STATIC_CAPABILITY_TASK_HANDLE_RECUR,
                        e_cal_meta_backend_get_capabilities (E_CAL_META_BACKEND (cbews)),
                        NULL);
        } else if (g_str_equal (prop_name, CAL_BACKEND_PROPERTY_CAL_EMAIL_ADDRESS)) {