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());
}
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>
/// 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;
}
}
/// <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);
}
