+
+ /* and reintroduce a ghost in its place */
+ ghost = _notmuch_message_create_for_message_id (notmuch, mid, &private_status);
+ if (private_status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
+ private_status = _notmuch_message_initialize_ghost (ghost, tid);
+ if (! private_status)
+ _notmuch_message_sync (ghost);
+ } else if (private_status == NOTMUCH_PRIVATE_STATUS_SUCCESS) {
+ /* this is deeply weird, and we should not have gotten into
+ this state. is there a better error message to return
+ here? */
+ return NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID;
+ }
+
+ notmuch_message_destroy (ghost);
+ return COERCE_STATUS (private_status, "Error converting to ghost message");
+}
+
+/* Transform a blank message into a ghost message. The caller must
+ * _notmuch_message_sync the message. */
+notmuch_private_status_t
+_notmuch_message_initialize_ghost (notmuch_message_t *message,
+ const char *thread_id)
+{
+ notmuch_private_status_t status;
+
+ status = _notmuch_message_add_term (message, "type", "ghost");
+ if (status)
+ return status;
+ status = _notmuch_message_add_term (message, "thread", thread_id);
+ if (status)
+ return status;
+
+ return NOTMUCH_PRIVATE_STATUS_SUCCESS;