[evolution-ews] Add revision support for addressbook

[David Woodhouse <dwmw2 src gnome org>]

commit c8b18a754f29ab592a25f9f192d998c8f1b8b889
Author: David Woodhouse <David Woodhouse intel com>
Date:   Fri Sep 5 15:01:43 2014 +0100

    Add revision support for addressbook
    
    When we add cursor support, it'll depend on this...

 src/addressbook/e-book-backend-ews.c |   53 ++++++++++++++++++++++++++++++++--
 1 files changed, 50 insertions(+), 3 deletions(-)
---
diff --git a/src/addressbook/e-book-backend-ews.c b/src/addressbook/e-book-backend-ews.c
index b3f6282..6d343e6 100644
--- a/src/addressbook/e-book-backend-ews.c
+++ b/src/addressbook/e-book-backend-ews.c
@@ -93,6 +93,8 @@ struct _EBookBackendEwsPrivate {
 
        guint subscription_key;
        gboolean listen_notifications;
+
+       guint rev_counter;
 };
 
 /* using this for backward compatibility with E_DATA_BOOK_MODE */
@@ -200,6 +202,28 @@ convert_error_to_edb_error (GError **perror)
        *perror = error;
 }
 
+static gboolean ebews_bump_revision (EBookBackendEws *ebews, GError **error)
+{
+       gboolean ret;
+       gchar *prop_value;
+       time_t t = time (NULL);
+
+       PRIV_LOCK (ebews->priv);
+       prop_value = g_strdup_printf ("%ld(%d)", (long) t, ++ebews->priv->rev_counter);
+       PRIV_UNLOCK (ebews->priv);
+
+       ret = e_book_sqlite_set_key_value (ebews->priv->summary, "revision",
+                                          prop_value, error);
+       if (ret)
+               e_book_backend_notify_property_changed (E_BOOK_BACKEND (ebews),
+                                                       BOOK_BACKEND_PROPERTY_REVISION,
+                                                       prop_value);
+       g_free (prop_value);
+
+       return ret;
+}
+
+
 static gboolean
 book_backend_ews_ensure_connected (EBookBackendEws *bbews,
                                   GCancellable *cancellable,
@@ -1348,7 +1372,7 @@ ews_create_contact_cb (GObject *object,
                e_contact_set (create_contact->contact, E_CONTACT_UID, item_id->id);
                e_contact_set (create_contact->contact, E_CONTACT_REV, item_id->change_key);
                e_book_sqlite_add_contact (ebews->priv->summary, create_contact->contact, NULL, TRUE, 
create_contact->cancellable, &error);
-
+               ebews_bump_revision (ebews, &error);
                if (error == NULL) {
                        GSList *contacts;
 
@@ -1505,8 +1529,10 @@ ews_book_remove_contact_cb (GObject *object,
 
        g_return_if_fail (priv->summary != NULL);
 
-       if (!g_simple_async_result_propagate_error (simple, &error))
+       if (!g_simple_async_result_propagate_error (simple, &error)) {
                deleted = e_book_sqlite_remove_contacts (priv->summary, remove_contact->sl_ids, 
remove_contact->cancellable, &error);
+               ebews_bump_revision (ebews, &error);
+       }
 
        if (deleted)
                e_data_book_respond_remove_contacts (remove_contact->book, remove_contact->opid, EDB_ERROR 
(SUCCESS),  remove_contact->sl_ids);
@@ -1632,6 +1658,7 @@ ews_modify_contact_cb (GObject *object,
                                modify_contact->new_contact, NULL,
                                TRUE, modify_contact->cancellable,
                                &error);
+               ebews_bump_revision (ebews, &error);
 
                if (error == NULL) {
                        GSList *new_contacts;
@@ -2408,6 +2435,7 @@ ews_gal_store_contact (EContact *contact,
                data->sha1_collector = g_slist_reverse (data->sha1_collector);
                e_book_sqlite_add_contacts (priv->summary, data->contact_collector, data->sha1_collector,
                                            TRUE, data->cancellable, error);
+               ebews_bump_revision (data->cbews, error);
 
                for (l = data->contact_collector; l != NULL; l = g_slist_next (l))
                        e_book_backend_notify_update (E_BOOK_BACKEND (data->cbews), E_CONTACT (l->data));
@@ -2519,6 +2547,8 @@ ews_replace_gal_in_db (EBookBackendEws *cbews,
        if (stale_uids && !e_book_sqlite_remove_contacts (priv->summary, stale_uids, cancellable, error))
                ret = FALSE;
 
+       ebews_bump_revision (cbews, error);
+
        t2 = g_get_monotonic_time ();
        d (g_print("GAL update completed %ssuccessfully in %ld µs. Added: %d, Changed: %d, Unchanged %d, 
Removed: %d\n",
                   ret ? "" : "un", t2 - t1,
@@ -3640,7 +3670,13 @@ e_book_backend_ews_get_backend_property (EBookBackend *backend,
                g_string_free (buffer, TRUE);
 
                return fields;
-       }
+       } else if (g_str_equal (prop_name, BOOK_BACKEND_PROPERTY_REVISION)) {
+               EBookBackendEws *ebews = E_BOOK_BACKEND_EWS (backend);
+               gchar *prop_value = NULL;
+
+               e_book_sqlite_get_key_value (ebews->priv->summary, "revision", &prop_value, NULL);
+               return prop_value;
+        }
 
        /* Chain up to parent's get_backend_property() method. */
        return E_BOOK_BACKEND_CLASS (e_book_backend_ews_parent_class)->
@@ -3757,6 +3793,7 @@ ews_update_items_thread (gpointer data)
                                e_book_sqlite_set_key_value (priv->summary, E_BOOK_SQL_SYNC_DATA_KEY, NULL, 
&error);
                                if (error != NULL)
                                        break;
+                               ebews_bump_revision (ebews, &error);
 
                                ebews_forget_all_contacts (ebews);
 
@@ -3823,6 +3860,7 @@ ews_update_items_thread (gpointer data)
                e_book_sqlite_set_key_value (priv->summary, E_BOOK_SQL_SYNC_DATA_KEY, sync_state, &error);
                if (error != NULL)
                        break;
+               ebews_bump_revision (ebews, &error);
        } while (!includes_last_item);
 
        if (error == NULL)
@@ -3892,6 +3930,7 @@ e_book_backend_ews_open_sync (EBookBackend *backend,
        EBookBackendEws *ebews;
        EBookBackendEwsPrivate * priv;
        gboolean need_to_authenticate;
+       gchar *revision = NULL;
 
        if (e_book_backend_is_opened (backend))
                return TRUE;
@@ -3913,6 +3952,14 @@ e_book_backend_ews_open_sync (EBookBackend *backend,
                return FALSE;
        }
 
+       e_book_sqlite_get_key_value (priv->summary, "revision", &revision, NULL);
+       if (revision) {
+               e_book_backend_notify_property_changed (backend,
+                                                       BOOK_BACKEND_PROPERTY_REVISION,
+                                                       revision);
+               g_free (revision);
+       }
+
        if (ebews->priv->is_gal)
                return TRUE;