IMP_Compose::_saveDraftServer PHP Method

    protected function _saveDraftServer($data)
    {
        if (!($drafts_mbox = IMP_Mailbox::getPref(IMP_Mailbox::MBOX_DRAFTS))) {
            throw new IMP_Compose_Exception(_("Saving the draft failed. No drafts mailbox specified."));
        }
        /* Check for access to drafts mailbox. */
        if (!$drafts_mbox->create()) {
            throw new IMP_Compose_Exception(_("Saving the draft failed. Could not create a drafts mailbox."));
        }
        $append_flags = array(Horde_Imap_Client::FLAG_DRAFT, Horde_Imap_Client::FLAG_MDNSENT);
        if (!$GLOBALS['prefs']->getValue('unseen_drafts')) {
            $append_flags[] = Horde_Imap_Client::FLAG_SEEN;
        }
        $old_uid = $this->getMetadata('draft_uid');
        /* Add the message to the mailbox. */
        try {
            $ids = $drafts_mbox->imp_imap->append($drafts_mbox, array(array('data' => $data, 'flags' => $append_flags)));
            if ($old_uid) {
                $old_uid->delete(array('nuke' => true));
            }
            $this->_setMetadata('draft_uid', $drafts_mbox->getIndicesOb($ids));
            return sprintf(_("The draft has been saved to the \"%s\" mailbox."), $drafts_mbox->display);
        } catch (IMP_Imap_Exception $e) {
            return _("The draft was not successfully saved.");
        }
    }