[evolution-mapi] Return back Free/Busy lookup in calendar backend

[Milan Crha <mcrha src gnome org>]

commit 38c84b48df79ec9d17d32e04a8bb7ce96262c5e5
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jun 5 19:28:04 2017 +0200

    Return back Free/Busy lookup in calendar backend
    
    I overlooked that function being implemented when changing
    the calendar backend to derive from ECalMetaBackend, thus
    this change just returns it back.

 src/calendar/e-cal-backend-mapi.c |   43 +++++++++++++++++++++++++++++++++++++
 1 files changed, 43 insertions(+), 0 deletions(-)
---
diff --git a/src/calendar/e-cal-backend-mapi.c b/src/calendar/e-cal-backend-mapi.c
index aced948..41617ab 100644
--- a/src/calendar/e-cal-backend-mapi.c
+++ b/src/calendar/e-cal-backend-mapi.c
@@ -1640,6 +1640,48 @@ ecb_mapi_send_objects_sync (ECalBackendSync *sync_backend,
        icalcomponent_free (icalcomp);
 }
 
+static void
+ecb_mapi_get_free_busy_sync (ECalBackendSync *sync_backend,
+                            EDataCal *cal,
+                            GCancellable *cancellable,
+                            const GSList *users,
+                            time_t start,
+                            time_t end,
+                            GSList **freebusyobjs,
+                            GError **error)
+{
+       ECalBackendMAPI *cbmapi;
+       GError *mapi_error = NULL;
+
+       g_return_if_fail (E_IS_CAL_BACKEND_MAPI (sync_backend));
+
+       cbmapi = E_CAL_BACKEND_MAPI (sync_backend);
+
+       ecb_mapi_lock_connection (cbmapi);
+
+       if (!e_cal_meta_backend_ensure_connected_sync (E_CAL_META_BACKEND (cbmapi), cancellable, &mapi_error) 
||
+           !cbmapi->priv->conn) {
+               ecb_mapi_unlock_connection (cbmapi);
+
+               if (!mapi_error)
+                       g_propagate_error (error, EDC_ERROR (RepositoryOffline));
+               else
+                       ecb_mapi_error_to_edc_error (error, mapi_error, RepositoryOffline, NULL);
+               g_clear_error (&mapi_error);
+               return;
+       }
+
+       if (!e_mapi_cal_utils_get_free_busy_data (cbmapi->priv->conn, users, start, end, freebusyobjs, 
cancellable, &mapi_error)) {
+               ecb_mapi_error_to_edc_error (error, mapi_error, OtherError, _("Failed to get Free/Busy 
data"));
+               ecb_mapi_maybe_disconnect (cbmapi, mapi_error);
+
+               if (mapi_error)
+                       g_error_free (mapi_error);
+       }
+
+       ecb_mapi_unlock_connection (cbmapi);
+}
+
 static gboolean
 ecb_mapi_get_destination_address (EBackend *backend,
                                  gchar **host,
@@ -1772,6 +1814,7 @@ e_cal_backend_mapi_class_init (ECalBackendMAPIClass *klass)
 
        sync_backend_class = E_CAL_BACKEND_SYNC_CLASS (klass);
        sync_backend_class->send_objects_sync = ecb_mapi_send_objects_sync;
+       sync_backend_class->get_free_busy_sync = ecb_mapi_get_free_busy_sync;
 
        backend_class = E_BACKEND_CLASS (klass);
        backend_class->get_destination_address = ecb_mapi_get_destination_address;