// This function updates a folder tree based on the
// changes received from the server in the response.
public void UpdateFolderTree(Folder rootFolder)
{
rootFolder.LastSyncTime = DateTime.Now.ToUniversalTime();
try
{
// Get sync key
XmlNode syncKeyNode = responseXml.SelectSingleNode(".//folderhierarchy:SyncKey", xmlNsMgr);
rootFolder.SyncKey = syncKeyNode.InnerText;
// Process adds (new folders) first
XmlNodeList addNodes = responseXml.SelectNodes(".//folderhierarchy:Add", xmlNsMgr);
foreach (XmlNode addNode in addNodes)
{
XmlNode nameNode = addNode.SelectSingleNode(".//folderhierarchy:DisplayName", xmlNsMgr);
XmlNode serverIdNode = addNode.SelectSingleNode(".//folderhierarchy:ServerId", xmlNsMgr);
XmlNode parentIdNode = addNode.SelectSingleNode(".//folderhierarchy:ParentId", xmlNsMgr);
XmlNode typeNode = addNode.SelectSingleNode(".//folderhierarchy:Type", xmlNsMgr);
rootFolder.AddFolder(nameNode.InnerText, serverIdNode.InnerText, parentIdNode.InnerText,
(Folder.FolderType)XmlConvert.ToInt32(typeNode.InnerText));
}
// Then process deletes
XmlNodeList deleteNodes = responseXml.SelectNodes(".//folderhierarchy:Delete", xmlNsMgr);
foreach (XmlNode deleteNode in deleteNodes)
{
XmlNode serverIdNode = deleteNode.SelectSingleNode(".//folderhierarchy:ServerId", xmlNsMgr);
Folder removeFolder = rootFolder.FindFolderById(serverIdNode.InnerText);
removeFolder.Remove();
}
// Finally process any updates to existing folders
XmlNodeList updateNodes = responseXml.SelectNodes(".//folderhierarchy:Update", xmlNsMgr);
foreach (XmlNode updateNode in updateNodes)
{
XmlNode nameNode = updateNode.SelectSingleNode(".//folderhierarchy:DisplayName", xmlNsMgr);
XmlNode serverIdNode = updateNode.SelectSingleNode(".//folderhierarchy:ServerId", xmlNsMgr);
XmlNode parentIdNode = updateNode.SelectSingleNode(".//folderhierarchy:ParentId", xmlNsMgr);
XmlNode typeNode = updateNode.SelectSingleNode(".//folderhierarchy:Type", xmlNsMgr);
Folder updateFolder = rootFolder.FindFolderById(serverIdNode.InnerText);
Folder updateParent = rootFolder.FindFolderById(parentIdNode.InnerText);
updateFolder.Update(nameNode.InnerText, updateParent,
(Folder.FolderType)XmlConvert.ToInt32(typeNode.InnerText));
}
}
catch (Exception e)
{
// Rather than attempting to recover, reset sync key
// and empty folders. The next FolderSync should
// re-sync folders.
rootFolder.SyncKey = "0";
rootFolder.RemoveAllSubFolders();
}
rootFolder.SaveFolderInfo();
}
