// http://stackoverflow.com/questions/21169573/how-to-implement-progress-reporting-for-portable-httpclient
// var progress = new Microsoft.Progress<double>();
// progress.ProgressChanged += (sender, value) => System.Console.Write("\r%{0:N0}", value);
// var cancellationToken = new CancellationTokenSource();
// await DownloadFileAsync("http://www.dotpdn.com/files/Paint.NET.3.5.11.Install.zip", progress, cancellationToken.Token);
public async Task DownloadFileAsync(string url, ProgressBar_Model progressBar, IFile file,CancellationToken token)
{
HttpClient client = new HttpClient();
var response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead, token);
if (!response.IsSuccessStatusCode)
{
throw new Exception(string.Format("The request returned with HTTP status code {0}", response.StatusCode));
}
long total = response.Content.Headers.ContentLength.HasValue ? response.Content.Headers.ContentLength.Value : -1L;
bool canReportProgress = progressBar != null && total != -1;
if (total == -1 && progressBar != null) progressBar.IsIndeterminate = true;
using (Stream
stream = await response.Content.ReadAsStreamAsync(),
writestream = await file.OpenAsync(FileAccess.ReadAndWrite))
{
int totalRead = 0;
byte[] buffer = new byte[4096];
bool isMoreToRead = true;
do
{
token.ThrowIfCancellationRequested();
var read = await stream.ReadAsync(buffer, 0, buffer.Length, token);
if (read == 0)
{
isMoreToRead = false;
}
else
{
//var data = new byte[read];
//buffer.ToList().CopyTo(0, data, 0, read);
// TODO: put here the code to write the file to disk
await writestream.WriteAsync(buffer, totalRead, read);
totalRead += read;
if (canReportProgress)
{
progressBar.Value = Convert.ToInt32((totalRead * 1d) / (total * 1d) * 100);
}
}
} while (isMoreToRead);
}
}
public void InstallLearningItem(UUID id,string path,ProgressBar_Model pb = null)
{
string DataFolder = FileService.GetPathToApplicationDataFolder();
string LearningItemFolder = Path.Combine(DataFolder, id.ToString());
FileService.CreateDirectory(LearningItemFolder);
if (pb != null) pb.Text = Tx.T("IStore.InstallLearningItem.Extract");
using (ZipFile zip = new ZipFile(path))
{
pb.Minimum = 0;pb.Maximum = 100;
zip.ExtractProgress += (sender,e) => pb.Value = Convert.ToInt32(e.BytesTransferred == 0 ? 0 : e.BytesTransferred * 100 / e.TotalBytesToTransfer);
foreach (ZipEntry zipelm in zip.Entries)
{
string localpath = Path.Combine(DataFolder,zipelm.FileName);
if (zipelm.IsDirectory)
{
Directory.CreateDirectory(localpath);
continue;
}
if (FileService.FileExists(localpath))
{
FileInfo fi = new FileInfo(localpath);
if (fi.Length == zipelm.UncompressedSize && fi.CreationTimeUtc == zipelm.CreationTime)
{
continue;
}
}
zipelm.Extract(DataFolder, ExtractExistingFileAction.OverwriteSilently);
}
}
if (pb != null) pb.Text = Tx.T("IStore.InstallLearningItem.Install");
string tmpDataFile = Path.Combine(LearningItemFolder, Constants.Store.LearningItemFileName);
DBBulkOperations.ImportLearningItem(tmpDataFile,false);
FileService.DeleteFile(tmpDataFile);
}
public void PublishLearningItem(LearningItem LearningItem,bool UploadVideo)
{
APIResult res;
pb = new ProgressBar_Model {};
pb.Title = string.Format(Tx.T("Publish.Messages.Publishing"), LearningItem.Name);
App.AddLongTaskProgressBar(pb);
try
{
// Testing rights
InteractiveAuthenticationAsUser();
if (!HasRight(UserRights.Collection.Publish))
{
string msg = Tx.T("Publish.Messages.NoRightForPublish");
throw new Exception(msg);
}
// Create a dat file
string DatFile = CreateDatFile(LearningItem);
// Create an archive
string ArchiveFile;
try
{
ArchiveFile = CreateArchive(LearningItem);
}
finally
{
File.Delete(DatFile);
}
// Create a Store item
StoreItem si = new StoreItem
{
id = LearningItem.id.guid,
Name = LearningItem.Name,
Description = LearningItem.Description,
YoutubeURL = LearningItem.YoutubeURL,
CoverFile = LearningItem.CoverFile,
VideoFileName = FileService.GetFileNameWithoutPath(LearningItem.VideoFileName),
VideoFileSize = FileService.GetFileSize(LearningItem.VideoFileName),
Version = LearningItem.Version
};
StoreItem r = WebAPI_LearningItems.GetById(si.id).Result;
if (r != null)
{
// update
res = WebAPI_LearningItems.Update(si).Result;
}
else
{
// create
res = WebAPI_LearningItems.Create(si).Result;
}
if (!res.Result)
{
FileService.DeleteFile(ArchiveFile);
throw new Exception(res.Message).Init(Tx.T("Publish.Messages.CantCreateStoreItem"), res.FullMessage);
}
// Upload an archive
try
{
AttachFile(LearningItem, ArchiveFile);
}
finally
{
FileService.DeleteFile(ArchiveFile);
}
// Upload a cover
string pathtocover = Path.Combine(FileService.GetPathToLearningItem(LearningItem),LearningItem.CoverFile);
if (FileService.FileExists(pathtocover))
{
AttachFile(LearningItem, pathtocover);
}
// Upload a video
if (UploadVideo)
{
if (!string.IsNullOrEmpty(LearningItem.VideoFileName))
{
AttachFile(LearningItem, LearningItem.VideoFileName);
}
}
LearningItem.Version++;
EFDbContext.SaveChgs();
}
finally
{
App.RemoveLongTaskProgressBar(pb);
}
}
public static void Download(ObservableCollection<VideoInfo> VideoInfos,VideoInfo videoinfo,string path,ProgressBar_Model pb)
{
if(pb != null)
{
pb.IsIndeterminate = false;
pb.Text = Tx.T("IStore.YoutubeDownloader.DownloadVideo")+" "+videoinfo.Title;
pb.Minimum = 0;
pb.Maximum = 100;
}
Info inf = GetInfo(videoinfo);
if (videoinfo.RequiresDecryption)
{
DownloadUrlResolver.DecryptDownloadUrl(videoinfo);
}
string pathtovideo = Path.Combine(path,inf.VideoFileName);
if (!File.Exists(pathtovideo))
{
var videoDownloader = new VideoDownloader(videoinfo, Path.Combine(path, inf.VideoFileName));
videoDownloader.DownloadProgressChanged += (sender, args) =>
{
if(pb != null) pb.Value = Convert.ToInt32(args.ProgressPercentage);
//if(args.ProgressPercentage == 100) ViewModelLocator.RemoveLongTaskProgressBar(pb);
};
videoDownloader.Execute();
}
/*
* Execute the video downloader.
* For GUI applications note, that this method runs synchronously.
*/
// Audio
if(videoinfo.AudioBitrate == 0)
{
VideoInfo vi = VideoInfos.OrderBy(x => x.Resolution).ThenByDescending(x=>x.AudioBitrate).FirstOrDefault();
if(vi != null)
{
if(pb != null)
{
pb.Text = Tx.T("IStore.YoutubeDownloader.DownloadSoundTrack")+" "+videoinfo.Title;
pb.Minimum = 0;
pb.Maximum = 100;
}
if (vi.RequiresDecryption)
{
DownloadUrlResolver.DecryptDownloadUrl(vi);
}
string pathtoaudio = Path.Combine(path, inf.AudioFileName);
if (!File.Exists(pathtoaudio))
{
var audioDownloader = new VideoDownloader(vi,pathtoaudio);
if(pb != null)
{
audioDownloader.DownloadProgressChanged += (sender, args) => {
pb.Value = Convert.ToInt32(args.ProgressPercentage);
};
}
audioDownloader.Execute();
}
}
}
}
public void DownloadStoreItem(StoreItemExt StoreItem)
{
pb = new ProgressBar_Model {};
pb.Title = string.Format(Tx.T("IStore.DownloadStoreItem.Messages.Download"), StoreItem.Name);
App.AddLongTaskProgressBar(pb);
try
{
// download dat file
string tempDatFile = Path.Combine(FileService.GetPathToTempFolder(), "LearningItem."+ StoreItem.id.ToString()+".dat");
string DatFileUrl = WebAPI_LearningItems.GetPathToDatFile(StoreItem.id);
DownloadFile(DatFileUrl, tempDatFile);
UUID li_id = new UUID(StoreItem.id);
// install dat file
try
{
InstallLearningItem(li_id,tempDatFile,pb);
}
finally
{
FileService.DeleteFile(tempDatFile);
}
LearningItem li = EFDbContext.Context.Find<LearningItem>(li_id);
if (AppSetting.LearningItems.Any(x=>x.id == li_id))
{
li.RefreshFromDB();
}
else
{
AppSetting.LearningItems.Add(li);
}
li.AppSetting = AppSetting;
// download video file
YoutubeDownloader.Info vinf = DownloadVideo(StoreItem);
li.VideoFileName = vinf.VideoFileName;
foreach(AudioTrack at in li.AudioTracks)
{
if (vinf.isExternalAudio)
{
at.ExternalFile = vinf.AudioFileName;
at.isExternal = vinf.isExternalAudio;
}
}
if (!AppSetting.LearningItems.Contains(li)) AppSetting.LearningItems.Add(li);
EFDbContext.SaveChgs();
StoreItem.LearningItem = li;
StoreItem.UpdateDownloadButtonStatus();
}
finally
{
App.RemoveLongTaskProgressBar(pb);
}
}
