static public async Task <IRandomAccessStream> RetrieveStorageFileAsStreamAsync(StorageFile file, bool parentFolder)
{
var coverStream = await CoverExtractor.GetCoverStreamFromFileAsync(file);
if (coverStream != null)
{
return(coverStream);
}
if (parentFolder)
{
var parent = await file.GetParentAsync();
if (parent != null)
{
var f =
await parent.TryGetItemAsync(CommonSharedStrings.FolderJpg) as StorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.CoverJpg) as StorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.FolderPng) as StorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.CoverPng) as StorageFile;
if (f != null)
{
return(await f.OpenReadAsync());
}
}
}
return(null);
}
static private async Task <BitmapImage> RetrieveStorageFileAsync(IStorageFile file, bool parentFolder)
{
BitmapImage img = null;
using (var coverStream = await CoverExtractor.GetCoverStreamFromFileAsync(file))
{
if (coverStream != null)
{
img = await CreateBitmapFromStreamAsync(coverStream);
}
}
if (img == null && file is IStorageItem2 && parentFolder)
{
// The file itself does not contain a cover image.
// Search in parent folder instead.
var parent = await(file as IStorageItem2).GetParentAsync();
if (parent != null)
{
var f =
await parent.TryGetItemAsync(CommonSharedStrings.FolderJpg) as IStorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.CoverJpg) as IStorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.FolderPng) as IStorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.CoverPng) as IStorageFile;
if (f != null)
{
using (var s = await f.OpenReadAsync())
img = await CreateBitmapFromStreamAsync(s);
}
}
}
// Cache even if null.
_bitmapDiskCache.TryAdd(file.Path, img);
return(img);
}
private static async Task InternalFetchAlbumAsync(string artist, string album, string filePath, bool online)
{
if (filePath != null)
{
var file = await NativeMethods.GetStorageFileFromPathAsync(filePath);
if (file != null)
{
using (var coverStream = await CoverExtractor.GetCoverStreamFromFileAsync(file))
{
if (coverStream != null)
{
using (var sr = new BinaryReader(coverStream.AsStream()))
{
var content = sr.ReadBytes((int)coverStream.Size);
await ThumbnailManager.AddAsync(artist, album, content, true);
return;
}
}
}
// The file itself does not contain a cover image.
// Search in parent folder instead.
if (file is IStorageItem2)
{
var parent = await(file as IStorageItem2).GetParentAsync();
if (parent != null)
{
var f =
await parent.TryGetItemAsync(CommonSharedStrings.FolderJpg) as IStorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.CoverJpg) as IStorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.FolderPng) as IStorageFile ??
await parent.TryGetItemAsync(CommonSharedStrings.CoverPng) as IStorageFile;
if (f != null)
{
using (var s = await f.OpenReadAsync())
using (var sr = new BinaryReader(s.AsStream()))
{
var content = sr.ReadBytes((int)s.Size);
await ThumbnailManager.AddAsync(artist, album, content, true);
return;
}
}
}
}
}
}
if (online && AggreatedOnlineMetadata.Availability)
{
// There is no cover image in the parent directory, or the parent directory cannot be retrieved.
// Search online
try
{
var searchResult = (await AggreatedOnlineMetadata.GetAlbumsAsync(album, artist)).FirstOrDefault();
if (searchResult != null)
{
using (var client = new HttpClient())
{
using (var response = await client.GetAsync(searchResult.Thumbnail))
{
response.EnsureSuccessStatusCode();
response.Content.Headers.TryGetValues("Content-Length", out var ctlength);
var lengthValue = ctlength.FirstOrDefault();
if (lengthValue == null ||
!ulong.TryParse(lengthValue, out ulong length))
{
length = 0;
}
if (length <= 10 * 1024 * 1024)
{
var content = await response.Content.ReadAsByteArrayAsync();
if (content.Length >= (int)length)
{
await ThumbnailManager.AddAsync(artist, album, content, true);
return;
}
}
}
}
}
}
catch { }
// Only write placeholder file when we don't have online results.
await ThumbnailManager.AddAsync(artist, album, new byte[0], true);
}
}