/// <summary>
/// Adds element to display if the item is in the current depth. Inserts sorted by name and folder
/// </summary>
/// <param name="element"></param>
private void AddToViewItems(ZipFileElement element)
{
if (element.ElementDepth != currentDepth)
{
return;
}
if (element.IsFolder)
{
FileSystemElements.Insert(folderIndex++, element);
}
else
{
FileSystemElements.Add(element);
}
}
/// <summary>
/// Loads further folders inside zip files
/// </summary>
/// <param name="fse"></param>
/// <param name="thumbnailOptions"></param>
private void LoadZipItem(ZipFileElement fse, FileSystemRetrieveService.ThumbnailFetchOptions thumbnailOptions, CancellationToken token)
{
currentDepth = fse.ElementDepth + 1;
//Load next depth
var depthElements = elements[currentDepth];
for (int i = 0; i < depthElements.Count; i++)
{
if (token.IsCancellationRequested)
{
return;
}
if (depthElements[i].ElementKey.Contains(fse.ElementKey))
{
FileSystemElements.Add(depthElements[i]);
}
}
}
/// <summary>
/// Loads a zip file
/// </summary>
/// <param name="fse"></param>
/// <param name="thumbnailOptions"></param>
private async void LoadZip(FileSystemElement fse, FileSystemRetrieveService.ThumbnailFetchOptions thumbnailOptions, CancellationToken token)
{
elements.Clear();
currentDepth = 0;
folderIndex = 0;
currentZIPFile = await FileSystem.GetFileAsync(fse);
currentFSE = fse;
using (Stream stream = await currentZIPFile.OpenStreamForReadAsync())
{
var reader = ReaderFactory.Open(stream);
while (reader.MoveToNextEntry())
{
if (token.IsCancellationRequested)
{
return;
}
var entry = reader.Entry;
var keySplit = entry.Key.Split("/");
var subPath = string.Join(@"\", keySplit, 0, keySplit.Length - 1);
int depth;
ZipFileElement element;
if (entry.IsDirectory)
{
var name = keySplit[keySplit.Length - 2];
depth = keySplit.Length - 2;
element = new ZipFileElement(
name,
fse.Path + @"\" + subPath,
entry.LastModifiedTime.Value,
(ulong)entry.Size,
entry.Key,
depth
);
elements.AddFirst(depth, element);
}
else
{
var name = keySplit[keySplit.Length - 1];
depth = keySplit.Length - 1;
string fileExtension = "";
var fileName = entry.Key.Split(".");
if (fileName.Length > 1)
{
fileExtension = fileName[fileName.Length - 1];
}
//Store fileStream to access it later
var elementStream = new MemoryStream();
reader.WriteEntryTo(elementStream);
await elementStream.FlushAsync();
var thumbnail = await FileSystem.GetFileExtensionThumbnail(fileExtension, thumbnailOptions.Mode, thumbnailOptions.Size, thumbnailOptions.Scale);
element = new ZipFileElement(
name,
fse.Path + @"\" + subPath,
entry.LastModifiedTime.Value,
(ulong)entry.Size,
thumbnail,
"." + fileExtension,
fileExtension,
entry.Key,
depth,
elementStream
);
elements.Add(depth, element);
}
AddToViewItems(element);
}
}
}
