GetVertexCount
(
XmlDocument oGraphMLXmlDocument
)
{
Debug.Assert(oGraphMLXmlDocument != null);
AssertValid();
Int32 iVertexCount = 0;
XmlNode oXmlNode;
XmlNamespaceManager oXmlNamespaceManager =
GraphMLXmlDocument.CreateXmlNamespaceManager(
oGraphMLXmlDocument, "g");
if (XmlUtil2.TrySelectSingleNode(oGraphMLXmlDocument,
"g:graphml/g:graph/g:node", oXmlNamespaceManager,
out oXmlNode))
{
while (oXmlNode != null)
{
if (oXmlNode.Name == "node")
{
iVertexCount++;
}
oXmlNode = oXmlNode.NextSibling;
}
}
return(iVertexCount);
}
AppendAllStatisticGraphMLAttributeValues
(
String sUserName,
XmlNode oVertexXmlNode,
GraphMLXmlDocument oGraphMLXmlDocument,
RequestStatistics oRequestStatistics
)
{
Debug.Assert(!String.IsNullOrEmpty(sUserName));
Debug.Assert(oVertexXmlNode != null);
Debug.Assert(oGraphMLXmlDocument != null);
Debug.Assert(oRequestStatistics != null);
AssertValid();
XmlDocument oXmlDocument;
XmlNamespaceManager oXmlNamespaceManager;
// Some of the statistics are available in the user's profile.
String sUrl = "http://gdata.youtube.com/feeds/api/users/"
+ EncodeUrlParameter(sUserName);
if (TryGetXmlDocument(sUrl, oRequestStatistics, out oXmlDocument,
out oXmlNamespaceManager))
{
AppendYouTubeDateGraphMLAttributeValue(oXmlDocument,
"a:entry/a:published/text()", oXmlNamespaceManager,
oGraphMLXmlDocument, oVertexXmlNode, JoinedDateUtcID);
AppendStringGraphMLAttributeValue(oXmlDocument,
"a:entry/media:thumbnail/@url", oXmlNamespaceManager,
oGraphMLXmlDocument, oVertexXmlNode,
NodeXLGraphMLUtil.VertexImageFileID);
XmlNode oStatisticsXmlNode;
if (XmlUtil2.TrySelectSingleNode(oXmlDocument,
"a:entry/yt:statistics", oXmlNamespaceManager,
out oStatisticsXmlNode))
{
AppendInt32GraphMLAttributeValue(oStatisticsXmlNode,
"@videoWatchCount", oXmlNamespaceManager,
oGraphMLXmlDocument, oVertexXmlNode, VideosWatchedID);
AppendInt32GraphMLAttributeValue(oStatisticsXmlNode,
"@subscriberCount", oXmlNamespaceManager,
oGraphMLXmlDocument, oVertexXmlNode, SubscribersID);
}
}
// The remaining statistics must be obtained from the totalResults
// XML node within documents obtained from other URLs.
const String TotalResultsXPath =
"a:feed/openSearch:totalResults/text()";
sUrl = GetFriendsOrSubscriptionsUrl(sUserName, true)
+ "?max-results=1";
AppendInt32GraphMLAttributeValue(sUrl, TotalResultsXPath,
oGraphMLXmlDocument, oRequestStatistics, oVertexXmlNode,
FriendsID);
sUrl = GetFriendsOrSubscriptionsUrl(sUserName, false)
+ "?max-results=1";
AppendInt32GraphMLAttributeValue(sUrl, TotalResultsXPath,
oGraphMLXmlDocument, oRequestStatistics, oVertexXmlNode,
SubscriptionsID);
sUrl = "http://gdata.youtube.com/feeds/api/users/"
+ EncodeUrlParameter(sUserName) + "/uploads?max-results=1";
AppendInt32GraphMLAttributeValue(sUrl, TotalResultsXPath,
oGraphMLXmlDocument, oRequestStatistics, oVertexXmlNode,
VideosUploadedID);
}