[evolution] Bug 779042 - Check whether meeting invitation is obsolete

[Milan Crha <mcrha src gnome org>]

commit 6ffb31752e3ff0f65109b31b34cb56d079987bb5
Author: Milan Crha <mcrha redhat com>
Date:   Thu Feb 23 13:23:28 2017 +0100

    Bug 779042 - Check whether meeting invitation is obsolete

 src/modules/itip-formatter/itip-view.c |  134 +++++++++++++++++++++++---------
 1 files changed, 97 insertions(+), 37 deletions(-)
---
diff --git a/src/modules/itip-formatter/itip-view.c b/src/modules/itip-formatter/itip-view.c
index 2eedbc2..62303b9 100644
--- a/src/modules/itip-formatter/itip-view.c
+++ b/src/modules/itip-formatter/itip-view.c
@@ -3628,6 +3628,49 @@ source_selected_cb (ItipView *view,
                g_object_ref (view));
 }
 
+static gboolean
+itip_comp_older_than_stored (ItipView *view,
+                            ECalComponent *real_comp)
+{
+       gboolean is_older = FALSE;
+       gint *psequence = NULL;
+       ECalComponentId *mail_id, *real_id;
+
+       if (!real_comp || !view->priv->comp ||
+           e_cal_component_get_vtype (view->priv->comp) != E_CAL_COMPONENT_EVENT)
+               return FALSE;
+
+       e_cal_component_get_sequence (view->priv->comp, &psequence);
+       if (!psequence)
+               return FALSE;
+
+       mail_id = e_cal_component_get_id (view->priv->comp);
+       if (!mail_id) {
+               e_cal_component_free_sequence (psequence);
+               return FALSE;
+       }
+
+       real_id = e_cal_component_get_id (real_comp);
+       if (real_id && g_strcmp0 (real_id->uid, mail_id->uid) == 0 && g_strcmp0 (real_id->rid, mail_id->rid) 
== 0) {
+               gint *pint = NULL;
+
+               e_cal_component_get_sequence (real_comp, &pint);
+               if (pint) {
+                       is_older = *psequence < *pint;
+
+                       e_cal_component_free_sequence (pint);
+               }
+       }
+
+       if (real_id)
+               e_cal_component_free_id (real_id);
+
+       e_cal_component_free_sequence (psequence);
+       e_cal_component_free_id (mail_id);
+
+       return is_older;
+}
+
 static void
 find_cal_update_ui (FormatItipFindData *fd,
                     ECalClient *cal_client)
@@ -3696,51 +3739,68 @@ find_cal_update_ui (FormatItipFindData *fd,
                        view, ITIP_VIEW_INFO_ITEM_TYPE_INFO,
                        _("Found the appointment in the calendar “%s”"), e_source_get_display_name (source));
 
-               /*
-                * Only allow replies if backend doesn't do that automatically.
-                * Only enable it for forwarded invitiations (PUBLISH) or direct
-                * invitiations (REQUEST), but not replies (REPLY).
-                * Replies only make sense for events with an organizer.
-                */
-               if ((!view->priv->current_client || !e_cal_client_check_save_schedules 
(view->priv->current_client)) &&
-                   (view->priv->method == ICAL_METHOD_PUBLISH || view->priv->method == ICAL_METHOD_REQUEST) 
&&
-                   view->priv->has_organizer) {
-                       rsvp_enabled = TRUE;
-               }
-               itip_view_set_show_rsvp_check (view, rsvp_enabled);
+               g_cancellable_cancel (fd->cancellable);
 
-               /* default is chosen in extract_itip_data() based on content of the VEVENT */
-               itip_view_set_rsvp (view, !view->priv->no_reply_wanted);
+               if (view->priv->method == ICAL_METHOD_REQUEST &&
+                   itip_comp_older_than_stored (view, g_hash_table_lookup (view->priv->real_comps, 
e_source_get_uid (source)))) {
+                       itip_view_set_mode (view, ITIP_VIEW_MODE_HIDE_ALL);
+                       itip_view_add_lower_info_item (
+                               view, ITIP_VIEW_INFO_ITEM_TYPE_INFO,
+                               _("This meeting invitation is obsolete. It had been updated."));
+                       itip_view_set_rsvp (view, FALSE);
+                       itip_view_set_show_free_time_check (view, FALSE);
+                       itip_view_set_show_inherit_alarm_check (view, FALSE);
+                       itip_view_set_show_keep_alarm_check (view, FALSE);
+                       itip_view_set_show_recur_check (view, FALSE);
+                       itip_view_set_show_rsvp_check (view, FALSE);
+                       itip_view_set_show_update_check (view, FALSE);
+                       set_buttons_sensitive (view);
+               } else {
+                       /*
+                        * Only allow replies if backend doesn't do that automatically.
+                        * Only enable it for forwarded invitiations (PUBLISH) or direct
+                        * invitiations (REQUEST), but not replies (REPLY).
+                        * Replies only make sense for events with an organizer.
+                        */
+                       if ((!view->priv->current_client || !e_cal_client_check_save_schedules 
(view->priv->current_client)) &&
+                           (view->priv->method == ICAL_METHOD_PUBLISH || view->priv->method == 
ICAL_METHOD_REQUEST) &&
+                           view->priv->has_organizer) {
+                               rsvp_enabled = TRUE;
+                       }
+                       itip_view_set_show_rsvp_check (view, rsvp_enabled);
 
-               set_buttons_sensitive (view);
+                       /* default is chosen in extract_itip_data() based on content of the VEVENT */
+                       itip_view_set_rsvp (view, !view->priv->no_reply_wanted);
 
-               g_cancellable_cancel (fd->cancellable);
+                       set_buttons_sensitive (view);
 
-               switch (view->priv->type) {
-                       case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
-                               extension_name = E_SOURCE_EXTENSION_CALENDAR;
-                               break;
-                       case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
-                               extension_name = E_SOURCE_EXTENSION_TASK_LIST;
-                               break;
-                       case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
-                               extension_name = E_SOURCE_EXTENSION_MEMO_LIST;
-                               break;
-                       default:
-                               g_return_if_reached ();
-               }
+                       switch (view->priv->type) {
+                               case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
+                                       extension_name = E_SOURCE_EXTENSION_CALENDAR;
+                                       break;
+                               case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
+                                       extension_name = E_SOURCE_EXTENSION_TASK_LIST;
+                                       break;
+                               case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
+                                       extension_name = E_SOURCE_EXTENSION_MEMO_LIST;
+                                       break;
+                               default:
+                                       g_return_if_reached ();
+                       }
 
-               itip_view_set_extension_name (view, extension_name);
+                       itip_view_set_extension_name (view, extension_name);
 
-               g_signal_connect (
-                       view, "source_selected",
-                       G_CALLBACK (source_selected_cb), NULL);
+                       g_signal_connect (
+                               view, "source_selected",
+                               G_CALLBACK (source_selected_cb), NULL);
 
-               itip_view_set_source (view, source);
+                       itip_view_set_source (view, source);
+               }
        } else if (!view->priv->current_client)
                itip_view_set_show_keep_alarm_check (view, FALSE);
 
-       if (view->priv->current_client && view->priv->current_client == cal_client) {
+       if (view->priv->current_client && view->priv->current_client == cal_client &&
+           itip_view_get_mode (view) != ITIP_VIEW_MODE_HIDE_ALL) {
                if (e_cal_client_check_recurrences_no_master (view->priv->current_client)) {
                        icalcomponent *icalcomp = e_cal_component_get_icalcomponent (view->priv->comp);