[evolution] I#1521 - Calendar: Removing recurrences not reflected in the UI

[Milan Crha <mcrha src gnome org>]

commit f1d32e08712a445a094e77391bcf3dbcddaa1372
Author: Milan Crha <mcrha redhat com>
Date:   Tue Jun 1 15:22:11 2021 +0200

    I#1521 - Calendar: Removing recurrences not reflected in the UI
    
    Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/1521

 src/calendar/gui/e-cal-model.c | 48 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 41 insertions(+), 7 deletions(-)
---
diff --git a/src/calendar/gui/e-cal-model.c b/src/calendar/gui/e-cal-model.c
index 776dce767c..0abb0b715a 100644
--- a/src/calendar/gui/e-cal-model.c
+++ b/src/calendar/gui/e-cal-model.c
@@ -1898,26 +1898,28 @@ e_cal_model_get_component_index (ECalModel *model,
 
                if (comp_data) {
                        const gchar *uid;
-                       gchar *rid;
                        gboolean has_rid = e_cal_component_id_get_rid (id) != NULL;
 
                        uid = i_cal_component_get_uid (comp_data->icalcomp);
-                       rid = e_cal_util_component_get_recurid_as_string (comp_data->icalcomp);
 
                        if (uid && *uid) {
                                if ((!client || comp_data->client == client) && strcmp (uid, 
e_cal_component_id_get_uid (id)) == 0) {
                                        if (has_rid) {
+                                               gchar *rid;
+
+                                               rid = e_cal_util_component_get_recurid_as_string 
(comp_data->icalcomp);
+
                                                if (!(rid && *rid && strcmp (rid, e_cal_component_id_get_rid 
(id)) == 0)) {
                                                        g_free (rid);
                                                        continue;
                                                }
+
+                                               g_free (rid);
                                        }
-                                       g_free (rid);
+
                                        return ii;
                                }
                        }
-
-                       g_free (rid);
                }
        }
 
@@ -1938,17 +1940,49 @@ cal_model_data_subscriber_component_added_or_modified (ECalDataModelSubscriber *
        gint index;
 
        model = E_CAL_MODEL (subscriber);
+       table_model = E_TABLE_MODEL (model);
 
        id = e_cal_component_get_id (comp);
 
-       index = e_cal_model_get_component_index (model, client, id);
+       /* The component should not exist, when it's claimed being added, thus, when it's the main
+          component, remove any existing instances and add it from scratch. */
+       if (is_added && !e_cal_component_id_get_rid (id)) {
+               GSList *removed_comps = NULL;
+
+               for (index = 0; index < model->priv->objects->len; index++) {
+                       comp_data = g_ptr_array_index (model->priv->objects, index);
+
+                       if (comp_data && comp_data->client == client) {
+                               const gchar *uid;
+
+                               uid = i_cal_component_get_uid (comp_data->icalcomp);
+
+                               if (uid && *uid && g_strcmp0 (uid, e_cal_component_id_get_uid (id)) == 0) {
+                                       e_table_model_pre_change (table_model);
+
+                                       g_ptr_array_remove_index (model->priv->objects, index);
+                                       removed_comps = g_slist_prepend (removed_comps, comp_data);
+                                       e_table_model_row_deleted (table_model, index);
+
+                                       index--;
+                               }
+                       }
+               }
+
+               g_signal_emit (model, signals[COMPS_DELETED], 0, removed_comps);
+
+               g_slist_free_full (removed_comps, g_object_unref);
+
+               index = -1;
+       } else {
+               index = e_cal_model_get_component_index (model, client, id);
+       }
 
        e_cal_component_id_free (id);
 
        if (index < 0 && !is_added)
                return;
 
-       table_model = E_TABLE_MODEL (model);
        icomp = i_cal_component_clone (e_cal_component_get_icalcomponent (comp));
 
        if (index < 0) {