/// <summary>
/// Compares the xml file list with the files currently in the library
/// Downloads any missing files
/// For file types of Layout will fire a LayoutChanged event, giving the filename of the layout changed
/// </summary>
public void CompareAndCollect()
{
XmlNodeList fileNodes = _xml.SelectNodes("/files/file");
//Inspect each file we have here
foreach (XmlNode file in fileNodes)
{
XmlAttributeCollection attributes = file.Attributes;
RequiredFile fileList = new RequiredFile();
if (attributes["type"].Value == "layout")
{
// Layout
string path = attributes["path"].Value;
// Does this file exist?
if (File.Exists(Properties.Settings.Default.LibraryPath + @"\" + path + ".xlf"))
{
// Calculate a MD5 for the current file
String md5 = _cacheManager.GetMD5(path + ".xlf");
System.Diagnostics.Debug.WriteLine(String.Format("Comparing current MD5 [{0}] with given MD5 [{1}]", md5, attributes["md5"].Value));
// Now we have the md5, compare it to the md5 in the xml
if (attributes["md5"].Value != md5)
{
// They are different
_cacheManager.Remove(path + ".xlf");
//TODO: This might be bad! Delete the old layout as it is wrong
try
{
File.Delete(Properties.Settings.Default.LibraryPath + @"\" + path + ".xlf");
}
catch (Exception ex)
{
Trace.WriteLine(new LogMessage("CompareAndCollect", "Unable to delete incorrect file because: " + ex.Message));
}
// Get the file and save it
fileList.chunkOffset = 0;
fileList.chunkSize = 0;
fileList.complete = false;
fileList.downloading = false;
fileList.path = path;
fileList.type = "layout";
fileList.md5 = attributes["md5"].Value;
fileList.retrys = 0;
_files.Add(fileList);
}
else
{
// The MD5 of the current file and the MD5 in RequiredFiles are the same.
// Therefore make sure this MD5 is in the CacheManager
_cacheManager.Add(path + ".xlf", md5);
_requiredFiles.MarkComplete(int.Parse(path), md5);
}
}
else
{
// No - get the file and save it (no chunks)
fileList.chunkOffset = 0;
fileList.chunkSize = 0;
fileList.complete = false;
fileList.downloading = false;
fileList.path = path;
fileList.type = "layout";
fileList.md5 = attributes["md5"].Value;
fileList.retrys = 0;
_files.Add(fileList);
}
}
else if (attributes["type"].Value == "media")
{
// Media
string path = attributes["path"].Value;
// Does this media exist?
if (File.Exists(Properties.Settings.Default.LibraryPath + @"\" + path))
{
String md5 = _cacheManager.GetMD5(path);
System.Diagnostics.Debug.WriteLine(String.Format("Comparing current MD5 [{0}] with given MD5 [{1}]", md5, attributes["md5"].Value));
// MD5 the file to make sure it is the same.
if (md5 != attributes["md5"].Value)
{
// File changed
_cacheManager.Remove(path);
// Delete the old media as it is wrong
try
{
File.Delete(Properties.Settings.Default.LibraryPath + @"\" + path);
}
catch (Exception ex)
{
Trace.WriteLine(new LogMessage("CompareAndCollect", "Unable to delete incorrect file because: " + ex.Message));
}
// Add to queue
fileList.chunkOffset = 0;
fileList.chunkSize = 512000;
fileList.complete = false;
fileList.downloading = false;
fileList.path = path;
fileList.type = "media";
fileList.size = int.Parse(attributes["size"].Value);
fileList.md5 = attributes["md5"].Value;
fileList.retrys = 0;
_files.Add(fileList);
}
else
{
// The MD5 of the current file and the MD5 in RequiredFiles are the same.
// Therefore make sure this MD5 is in the CacheManager
_cacheManager.Add(path, md5);
string[] filePart = path.Split('.');
_requiredFiles.MarkComplete(int.Parse(filePart[0]), md5);
}
}
else
{
// No - Get it (async call - with chunks... through another class?)
fileList.chunkOffset = 0;
fileList.chunkSize = 512000;
fileList.complete = false;
fileList.downloading = false;
fileList.path = path;
fileList.type = "media";
fileList.size = int.Parse(attributes["size"].Value);
fileList.md5 = attributes["md5"].Value;
fileList.retrys = 0;
_files.Add(fileList);
}
}
else if (attributes["type"].Value == "blacklist")
{
// Expect <file type="blacklist"><file id="" /></file>
XmlNodeList items = file.ChildNodes;
BlackList blackList = new BlackList();
try { blackList.Truncate(); }
catch { }
if (items.Count > 0)
{
blackList.Add(items);
blackList.Dispose();
blackList = null;
}
items = null;
}
else
{
//Ignore node
}
}
Debug.WriteLine(String.Format("There are {0} files to get", _files.Count.ToString()));
// Output a list of the files we need to get
string debugMessage = "";
foreach (RequiredFile fileToGet in _files)
debugMessage += string.Format("File: {0}, Type: {1}, MD5: {2}. ", fileToGet.path, fileToGet.type, fileToGet.md5);
Debug.WriteLine(debugMessage);
// Report the files files back to XMDS
_requiredFiles.ReportInventory();
// Write Required Files
_requiredFiles.WriteRequiredFiles();
// Is there anything to get?
if (_files.Count == 0)
{
CollectionComplete();
return;
}
// Start with the first file
_currentFile = 0;
// Preload the first filelist
_currentFileList = _files[_currentFile];
// Get the first file
GetFile();
}