+{
+ notmuch_private_status_t status;
+ notmuch_message_t *message;
+
+ if (! (notmuch->features & NOTMUCH_FEATURE_GHOSTS))
+ return _resolve_message_id_to_thread_id_old (notmuch, ctx, message_id,
+ thread_id_ret);
+
+ /* Look for this message (regular or ghost) */
+ message = _notmuch_message_create_for_message_id (
+ notmuch, message_id, &status);
+ if (status == NOTMUCH_PRIVATE_STATUS_SUCCESS) {
+ /* Message exists */
+ *thread_id_ret = talloc_steal (
+ ctx, notmuch_message_get_thread_id (message));
+ } else if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
+ /* Message did not exist. Give it a fresh thread ID and
+ * populate this message as a ghost message. */
+ *thread_id_ret = talloc_strdup (
+ ctx, _notmuch_database_generate_thread_id (notmuch));
+ if (! *thread_id_ret) {
+ status = NOTMUCH_PRIVATE_STATUS_OUT_OF_MEMORY;
+ } else {
+ status = _notmuch_message_initialize_ghost (message, *thread_id_ret);
+ if (status == 0)
+ /* Commit the new ghost message */
+ _notmuch_message_sync (message);
+ }
+ } else {
+ /* Create failed. Fall through. */
+ }
+
+ notmuch_message_destroy (message);
+
+ return COERCE_STATUS (status, "Error creating ghost message");
+}
+
+/* Pre-ghost messages _resolve_message_id_to_thread_id */
+static notmuch_status_t
+_resolve_message_id_to_thread_id_old (notmuch_database_t *notmuch,
+ void *ctx,
+ const char *message_id,
+ const char **thread_id_ret)