/// <summary>
/// Clears a selected task
/// </summary>
/// <param name="msg"></param>
protected override void ClearDownload(ClearMessage msg)
{
foreach (var task in DownloadingItems.Where(task => task.DataContext == msg.DownloadItemViewModel).ToList())
{
var viewModel = (DownloadItemViewModel)task.DataContext;
viewModel.Dispose();
DownloadingItems.Remove(task);
}
}
private void ReadyToNextDownload()
{
var downInfo = DownloadingItems.FirstOrDefault(v => v.DownloadState == DownloadState.Await);
if (downInfo != null)
{
ReadyToDownload(downInfo);
}
else
{
_isDownloading = false;
}
}
/// <summary>
/// Adds a new download task
/// </summary>
/// <param name="msg"></param>
protected override void NewDownload(DownloadMessage msg)
{
try
{
DownloadingItems.Add(new DownloadItemView {
DataContext = new DownloadItemViewModel(msg.Url)
});
}
catch (Exception ex)
{
DialogService.ShowMessageBox(ex.Message);
}
}
/// <summary>
/// Clears all tasks that are not in progress
/// </summary>
public void Clear()
{
// Get all tasks which have either status finished, canceled or error
var tasksToClear = from task in DownloadingItems
let dataContext = (DownloadItemViewModel)task.DataContext
where !dataContext.IsDownloading
select task;
foreach (var task in tasksToClear.ToList())
{
var viewModel = (DownloadItemViewModel)task.DataContext;
viewModel.Dispose();
DownloadingItems.Remove(task);
}
}
/// <summary>
/// 删除不存在关联的本地文件
/// </summary>
private void CheckRubbishDownload()
{
try
{
using (var isoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
var locals = isoStore.GetFileNames("/PersonalCenter/MyDownload/*");
var files = locals.Where(v => v.Contains(".mp4")).Select(v => v);
var rubbishs = files.Except(DownloadingItems.Select(v => v.LocalFileName)).Except(DownloadedItems.Select(v => v.LocalFileName));
foreach (var rubbish in rubbishs)
{
isoStore.DeleteFile(rubbish);
}
}
}
catch { }
}
/// <summary>
/// 删除不存在关联的本地文件
/// </summary>
private async void CheckRubbishDownload()
{
var folder = ApplicationData.Current.LocalFolder;
try
{
var locals = await folder.GetFilesAsync();
var files = locals.Where(v => v.Name.Contains(".mp4")).Select(v => v.Name);
var rubbishs = files.Except(DownloadingItems.Select(v => v.LocalFileName)).Except(DownloadedItems.Select(v => v.LocalFileName));
foreach (var rubbish in rubbishs)
{
var file = await folder.GetFileAsync(rubbish);
await file.DeleteAsync();
}
}
catch { }
}
/// <summary>
/// Invoked when BtnExtract is clicked
/// Starts the extraction process of a video or playlist
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void BtnExtract_Click(object sender, RoutedEventArgs e)
{
//The list of videos available for download
IEnumerable <VideoInfo> videoList = null;
//Prevent another video being downloaded
DisableExtractionButton(WAIT_TEXT);
//Get the video info
videoList = await Task.Run(() => ResolveURL(ExtractionUrl));
//Check that the return was not null
if (videoList == null)
{
MessageBox.Show("The URL entered is not a valid YouTube video URL!");
EnableExtractionButton(DOWNLOAD_TEXT_QUERY);
return;
}
//The user download preferences selector
WndwInfoSelector infoSelector = null;
//The video to download
VideoInfo video = null;
while (true)
{
//Get the user preferences
infoSelector = GetUserDownloadPreferences(videoList);
//If we are to download video, else download audio
if (infoSelector.SelectedDownloadType == DownloadType.Video)
{
//Try to find the first element
try
{
//Get the first video with the selected resolution and format and highest bitrate
video = videoList.Where(info => info.Resolution == infoSelector.SelectedVideoResolution &&
info.VideoExtension == infoSelector.SelectedVideoExtension && info.AudioBitrate == infoSelector.SelectedAudioBitrate)
.First();
break;
}
catch
{
MessageBox.Show("We couldn't find a video with the stats that you selected!");
continue;
}
}
else
{
try
{
//Get the first video with the selected resolution and format and highest bitrate
video = videoList.Where(info => info.AudioBitrate == infoSelector.SelectedAudioBitrate &&
info.AudioExtension == infoSelector.SelectedAudioExtension && info.CanExtractAudio)
.First();
break;
} catch
{
MessageBox.Show("We couldn't find an audio track with the stats that you selected!");
continue;
}
}
}
//If the video has an encrypted signature, decode it
if (video.RequiresDecryption)
{
DownloadUrlResolver.DecryptDownloadUrl(video);
}
//Get the download folder location
string downloadLocation = ShowFolderSelectionDialog();
if (infoSelector.SelectedDownloadType == DownloadType.Video)
{
//Create the downloader
VideoDownloader downloader = new VideoDownloader(video, Path.Combine(downloadLocation, DownloadItem.PathCleaner(video.Title) + video.VideoExtension));
//Create a new DownloadVideo item
DownloadVideoItem item = new DownloadVideoItem(DownloadType.Video, video.Title, downloader);
//Add a new DownloadVideoItem
DownloadingItems.Add(item);
EnableExtractionButton(DOWNLOAD_TEXT_QUERY);
}
else
{
//Create the audio downloader
AudioDownloader downloader = new AudioDownloader(video, Path.Combine(downloadLocation, DownloadItem.PathCleaner(video.Title) + video.AudioExtension));
//Create a new DownloadAudio item
DownloadAudioItem item = new DownloadAudioItem(DownloadType.Audio, video.Title, downloader);
//Add the new DownloadAudioItem
DownloadingItems.Add(item);
EnableExtractionButton(DOWNLOAD_TEXT_QUERY);
}
}
