public void Add(Song song, int maxumumDistance)
{
if (song == null)
{
throw new ArgumentNullException("song");
}
var name = song.Name.ToList();
if (_songs.All(x => MathUtils.LevenshteinDistance(x.Name.ToList(), name) >= maxumumDistance))
{
_songs.Add(song);
song.OwnGroup = this;
}
}
private void DownloadSongCore(Song song)
{
_semaphore.WaitOne();
if(_operationCanceled)
{
_semaphore.Release();
return;
}
var wc = new WebClient();
wc.DownloadProgressChanged += OnDownloadProgressChanged;
wc.DownloadFileCompleted += OnDownloadFileCompleted;
var fullPath = GetSongFullPath(song);
if (!File.Exists(fullPath))
{
var tempPath = GetSongTempPath(song);
try
{
if (File.Exists(tempPath))
{
File.Delete(tempPath);
}
}
catch (IOException ex)
{
Trace.TraceError("{0}\n\n{1}", ex.Message, ex.StackTrace);
}
Monitor.Enter(this);
_webClients.Add(wc);
Monitor.Exit(this);
wc.DownloadFileAsync(new Uri(song.Url), tempPath, song);
}
else
{
OnDownloadComplete(song);
}
}
private void ProcessSongNode(HtmlNode node)
{
var boldGroupNameNode = node.SelectSingleNode(".//b");
if(boldGroupNameNode == null)
return;
var groupName = DeleteSpecialSymbols(boldGroupNameNode.InnerText);
if (string.IsNullOrEmpty(groupName))
{
return;
}
var chars = groupName.ToList();
var group = _groupList.FirstOrDefault(
x => MathUtils.LevenshteinDistance(x.Name.ToList(), chars) < Settings.Default.Storage.MaximumLevenshteinDistance);
if (group == null)
{
group = new Group(groupName);
_groupList.Add(group);
}
var title = DeleteSpecialSymbols(node.SelectSingleNode(".//span").InnerText);
if (string.IsNullOrEmpty(title))
{
return;
}
Match match;
var image = node.SelectSingleNode(".//img[@class='playimg']");
if (image != null)
{
var onclick = image.GetAttributeValue("onclick", string.Empty).Replace("'", "'");
match = OperateRegexp.Match(onclick);
if (match.Success)
{
var song = new Song(title, match.Groups[1].Value, match.Groups[2].Value, match.Groups[3].Value);
group.Add(song, Settings.Default.Storage.MaximumLevenshteinDistance);
return;
}
match = OperateWithLinkRegexp.Match(onclick);
if (match.Success)
{
var song = new Song(title, match.Groups[1].Value);
group.Add(song, Settings.Default.Storage.MaximumLevenshteinDistance);
return;
}
match = OperateWallWithLinkRegexp.Match(onclick);
if (match.Success)
{
var song = new Song(title, match.Groups[1].Value);
group.Add(song, Settings.Default.Storage.MaximumLevenshteinDistance);
return;
}
}
var hiddenField = node.SelectSingleNode("./..//input[@type='hidden']");
if(hiddenField != null)
{
var value = hiddenField.GetAttributeValue("value", string.Empty);
match = HiddenFieldWithPath.Match(value);
if(match.Success)
{
var song = new Song(title, match.Groups[1].Value);
group.Add(song, Settings.Default.Storage.MaximumLevenshteinDistance);
return;
}
}
}
private void DownloadFileExcaptionHandler(Song song, Exception error)
{
var webException = error as WebException;
if (webException != null)
{
switch (webException.Status)
{
case WebExceptionStatus.ProtocolError:
var response = ((HttpWebResponse)webException.Response);
if (response.StatusCode == HttpStatusCode.NotFound)
{
Dispatcher.Invoke(DispatcherPriority.Normal, new Action(() => DeleteSongWithMessageBox(song)));
}
break;
case WebExceptionStatus.UnknownError:
//This happends when the elthernet connection becomes unplugged
Dispatcher.Invoke(DispatcherPriority.Background, new DispatcherOperationCallback(delegate
{
if (CancelDownloadCommand.CanExecute(null, this))
{
CancelDownloadCommand.Execute(null, this);
}
return null;
}), null);
break;
case WebExceptionStatus.Timeout:
Dispatcher.Invoke(DispatcherPriority.Normal, new Action(() => DeleteSongWithMessageBox(song)));
break;
}
}
}
private void DeleteSongWithMessageBox(Song song)
{
DeleteSong(song);
if (SongList.Count == 0)
{
MessageBox.Show(this, ResourceStrings.MainWindowCompleteContent, ResourceStrings.MainWindowCompleteTitle,
MessageBoxButton.OK);
IsNotInDownloadState = true;
}
}
private void DeleteSong(Song selected)
{
foreach (var group in _groupList)
{
group.Remove(selected);
}
SongList.Remove(selected);
_songsListBox.SelectedIndex = _songsListBox.SelectedIndex;
}
private string CreateSongPath(Song song)
{
var lastPath = Settings.Default.Storage.DownloadFormat.Replace("%a", song.OwnGroup.Name).Replace("%t", song.Name);
return Path.Combine(_outputPath, lastPath);
}
public void DownloadSong(Song song)
{
new Thread(() => DownloadSongCore(song)).Start();
}
private void OnDownloadComplete(Song song)
{
_semaphore.Release();
if (FileDownloaded != null)
{
FileDownloaded(song);
}
}
private string GetSongTempPath(Song song)
{
return GetSongFullPath(song) + ".temp";
}
private string GetSongFullPath(Song song)
{
var path = CreateSongPath(song);
var folder = Path.GetDirectoryName(path);
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
return path;
}
public void Remove(Song song)
{
_songs.Remove(song);
}