/// <summary>
/// Fetch a page of archived messages
/// </summary>
/// <param name="pageRequest">Paging options</param>
/// <param name="with">Optional filter to only return messages if they match the supplied JID</param>
/// <param name="roomId">Optional filter to only return messages if they match the supplied JID</param>
/// <param name="start">Optional filter to only return messages whose timestamp is equal to or later than the given timestamp.</param>
/// <param name="end">Optional filter to only return messages whose timestamp is equal to or earlier than the timestamp given in the 'end' field.</param>
internal Task <XmppPage <Im.Message> > GetArchivedMessages(XmppPageRequest pageRequest, Jid with = null, Jid roomId = null, DateTimeOffset?start = null, DateTimeOffset?end = null)
{
Core.Iq iq = im.IqRequest(Core.IqType.Get, null, im.Jid, Xml.Element("query", xmlns));
if (iq.Type == Core.IqType.Result)
{
var query = iq.Data["query"];
if (query == null || query.NamespaceURI != xmlns)
{
throw new XmppException("Erroneous server response.");
}
DataForm form = DataFormFactory.Create(query["x"]);
string queryId = Guid.NewGuid().ToString().Replace("-", "");
var request = Xml.Element("query", xmlns)
.Attr("queryid", queryId)
.Child(pageRequest.ToXmlElement());
var filterForm = new SubmitForm();
foreach (var campo in form.Fields)
{
if (campo.Type == DataFieldType.Hidden)
{
filterForm.Fields.Add(campo);
}
if (campo.Name == "with" && with != null)
{
filterForm.AddUntypedValue("with", with);
}
if (campo.Name == "start" && start.HasValue)
{
filterForm.AddUntypedValue("start", DateTimeProfiles.ToXmppDateTimeString(start.Value));
}
if (campo.Name == "end" && end.HasValue)
{
filterForm.AddUntypedValue("end", DateTimeProfiles.ToXmppDateTimeString(end.Value));
}
}
request.Child(filterForm.ToXmlElement());
var tcs = new TaskCompletionSource <XmppPage <Im.Message> >();
var queryTask = pendingQueries[queryId] = new ArchiveQueryTask(tcs);
im.IqRequestAsync(Net.Xmpp.Core.IqType.Set, roomId, null, request, null,
(string id, Core.Iq response) =>
{
if (response.Type == Core.IqType.Error)
{
queryTask.SetException(Util.ExceptionFromError(response, "Failed to get archived messages"));
}
else
{
TryFinaliseQuery(response.Data);
}
});
return(tcs.Task);
}
else
{
var error = iq.Data["error"];
throw new Exception(error["text"].InnerText);
}
}
/// <summary>
/// Invoked when an IQ stanza is being received.
/// </summary>
/// <param name="stanza">The stanza which is being received.</param>
/// <returns>true to intercept the stanza or false to pass the stanza
/// on to the next handler.</returns>
public bool Input(Core.Iq stanza)
{
return(TryFinaliseQuery(stanza.Data));
}
