public void refreshMeta(XElement root = null) {
_meta = null;
if (root != null) _meta = getMeta(root);
}
//********** meta informace (obsah <script type="text/meta" tagu v .lmdata souboru)
public void workerOper(workers w, wOper oper) {
var lmd = XElement.Load(fileName());
//adjust script a lmdataMeta
var script = lmd.Element(html + "head").Elements(html + "script").Where(s => s.AttributeValue("type") == "text/meta").FirstOrDefault();
lmdataMeta mt = null;
if (script == null) lmd.Element(html + "head").Add(script = new XElement(html + "script", new XAttribute("type", "text/meta")));
else mt = LMJson.Decode<lmdataMeta>(script.Value);
if (mt == null) mt = new lmdataMeta();
if (mt.history == null) mt.history = new List<lmdataMeta.item>();
//add to history
DateTime dt = DateTime.Now;
mt.history.Add(new lmdataMeta.item { date = LowUtils.dateToNum(dt), oper = oper, worker = w, fileGroup = _actFileGroup });
//save history
script.Value = LMJson.Encode(mt, true);
lmd.Save(fileName());
refreshMeta(lmd);
}