public static IAsyncActionWithProgress <double> ClearCachedGalleriesAsync()
{
return(Run <double>(async(token, progress) =>
{
using (var db = new GalleryDb())
{
var folder = GalleryImage.ImageFolder ?? await GalleryImage.GetImageFolderAsync();
var todelete = await db.ImageSet
.Where(im => !db.SavedSet.Any(sm => im.UsingBy.Any(gi => gi.GalleryId == sm.GalleryId)))
.ToListAsync(token);
double count = todelete.Count;
var i = 0;
foreach (var item in todelete)
{
var file = await folder.TryGetFileAsync(item.FileName);
if (file != null)
{
await file.DeleteAsync();
}
progress.Report(++i / count);
}
db.ImageSet.RemoveRange(todelete);
await db.SaveChangesAsync();
}
}));
}
protected IAsyncOperation <ImageSource> GetThumbLocalilyAsync()
{
return(Run <ImageSource>(async token =>
{
using (var db = new GalleryDb())
{
db.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
var gId = this.ID;
var imageModel = db.GalleryImageSet
.Include(gi => gi.Image)
.Where(gi => gi.GalleryId == gId)
.OrderBy(gi => gi.PageId)
.FirstOrDefault();
if (imageModel is null)
{
return null;
}
var folder = GalleryImage.ImageFolder ?? await GalleryImage.GetImageFolderAsync();
var file = await folder.TryGetFileAsync(imageModel.Image.FileName);
if (file is null)
{
return null;
}
try
{
using (var stream = await file.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode.SingleItem))
{
await CoreApplication.MainView.Dispatcher.Yield();
var image = new BitmapImage();
await image.SetSourceAsync(stream);
return image;
}
}
catch (Exception)
{
return null;
}
}
}));
}
protected IAsyncOperation <SoftwareBitmap> GetThumbLocalilyAsync()
{
return(Run(async token =>
{
using (var db = new GalleryDb())
{
db.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
var gId = this.ID;
var imageModel = db.GalleryImageSet
.Include(gi => gi.Image)
.Where(gi => gi.GalleryId == gId)
.OrderBy(gi => gi.PageId)
.FirstOrDefault();
if (imageModel == null)
{
return null;
}
var folder = GalleryImage.ImageFolder ?? await GalleryImage.GetImageFolderAsync();
var file = await folder.TryGetFileAsync(imageModel.Image.FileName);
if (file == null)
{
return null;
}
try
{
using (var stream = await file.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode.SingleItem))
{
var decoder = await BitmapDecoder.CreateAsync(stream);
return await decoder.GetSoftwareBitmapAsync(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
}
}
catch (Exception)
{
return null;
}
}
}));
}
public static IAsyncActionWithProgress <double> ClearAllGalleriesAsync()
{
return(Run <double>(async(token, progress) =>
{
progress.Report(double.NaN);
var folder = GalleryImage.ImageFolder ?? await GalleryImage.GetImageFolderAsync();
var getFiles = folder.GetFilesAsync();
using (var db = new GalleryDb())
{
db.SavedSet.RemoveRange(db.SavedSet);
db.ImageSet.RemoveRange(db.ImageSet);
await db.SaveChangesAsync();
}
var files = await getFiles;
double c = files.Count;
var i = 0;
foreach (var item in files)
{
await item.DeleteAsync();
progress.Report(++i / c);
}
}));
}