private static IList <ArchivedMessage> GetChatMessagesFromStanza(XmlElement xml)
{
List <ArchivedMessage> messages = new List <ArchivedMessage>();
DateTimeOffset startTime = default(DateTimeOffset);
var startAttribute = xml.Attributes["start"];
if (startAttribute != null)
{
startTime = DateTimeProfiles.FromXmppString(startAttribute.InnerText);
}
var messageNodes = xml.GetElementsByTagName("from");
foreach (XmlElement node in messageNodes)
{
messages.Add(GetChatMessageFromNode(startTime, node));
}
messageNodes = xml.GetElementsByTagName("to");
foreach (XmlElement node in messageNodes)
{
messages.Add(GetChatMessageFromNode(startTime, node));
}
return(messages.OrderBy(m => m.Timestamp).ToList());
}
/// <summary>
/// Create an archived chat page from an xml response
/// </summary>
/// <param name="xml"></param>
internal ArchivedChatPage(XmlElement xml)
: base(xml, GetChatMessagesFromStanza)
{
var withAttribute = xml.Attributes["with"];
if (withAttribute != null)
{
With = withAttribute.InnerText;
}
var startAttribute = xml.Attributes["start"];
if (startAttribute != null)
{
Start = DateTimeProfiles.FromXmppString(startAttribute.InnerText);
}
var subjectAttribute = xml.Attributes["subject"];
if (subjectAttribute != null)
{
Subject = subjectAttribute.InnerText;
}
var versionAttribute = xml.Attributes["version"];
if (versionAttribute != null)
{
int version = 0;
int.TryParse(versionAttribute.InnerText, out version);
Version = version;
}
}
private static IList <ArchivedChatId> GetChatIdsFromStanza(XmlElement xml)
{
List <ArchivedChatId> chats = new List <ArchivedChatId>();
var chatNodes = xml.GetElementsByTagName("chat");
foreach (XmlNode node in chatNodes)
{
string with = null;
try
{
with = node.Attributes["with"].InnerText;
}
catch
{
}
DateTimeOffset start = default(DateTimeOffset);
try
{
string startText = node.Attributes["start"].InnerText;
start = DateTimeProfiles.FromXmppString(startText);
}
catch
{
}
chats.Add(new ArchivedChatId(with, start));
}
return(chats);
}
/// <summary>
/// Try to get a timestamp from a delay node. If this fails, return the current UTC time.
/// </summary>
/// <param name="xml">The xml node that contains a delay node</param>
public static DateTimeOffset GetDelayedTimestampOrNow(XmlElement xml)
{
DateTimeOffset timestamp = DateTimeOffset.UtcNow;
// Refer to XEP-0203.
var delay = xml["delay"];
if (delay != null && delay.NamespaceURI == "urn:xmpp:delay")
{
var stampAttribute = delay.GetAttribute("stamp");
if (stampAttribute != null)
{
timestamp = DateTimeProfiles.FromXmppString(stampAttribute);
}
}
return(timestamp);
}
/// <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 <Message> > GetArchivedMessages(XmppPageRequest pageRequest, Jid with = null, Jid roomId = null, DateTimeOffset?start = null, DateTimeOffset?end = null)
{
string queryId = Guid.NewGuid().ToString().Replace("-", "");
var request = Xml.Element("query", xmlns)
.Attr("queryid", queryId)
.Child(pageRequest.ToXmlElement());
if (with != null || start != null || end != null)
{
var filterForm = new SubmitForm();
filterForm.AddValue("FORM_TYPE", DataFieldType.Hidden, xmlns);
if (with != null)
{
filterForm.AddUntypedValue("with", with);
}
if (start != null)
{
filterForm.AddUntypedValue("start", DateTimeProfiles.ToXmppDateTimeString(start.Value));
}
if (end != null)
{
filterForm.AddUntypedValue("end", DateTimeProfiles.ToXmppDateTimeString(end.Value));
}
request.Child(filterForm.ToXmlElement());
}
var tcs = new TaskCompletionSource <XmppPage <Message> >();
var queryTask = pendingQueries[queryId] = new ArchiveQueryTask(tcs);
var response = IM.IqRequest(Sharp.Xmpp.Core.IqType.Set, roomId, null, request);
if (response.Type == Core.IqType.Error)
{
queryTask.SetException(Util.ExceptionFromError(response, "Failed to get archived messages"));
}
return(tcs.Task);
}
