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rework dynamic image provider

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This commit is contained in:
Luke Pulverenti
2015-03-14 13:02:51 -04:00
parent fc115a0c2b
commit cf0456360b
3 changed files with 75 additions and 24 deletions
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81
MediaBrowser.Server.Implementations/Photos/BaseDynamicImageProvider.cs
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@@ -2,6 +2,7 @@
using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Drawing;
using MediaBrowser.Model.Entities;
@@ -15,7 +16,7 @@ using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Photos
{
public abstract class BaseDynamicImageProvider<T> : IHasChangeMonitor, IForcedProvider, IDynamicImageProvider, IHasOrder
public abstract class BaseDynamicImageProvider<T> : IHasChangeMonitor, IForcedProvider, ICustomMetadataProvider<T>, IHasOrder
where T : IHasMetadata
{
protected IFileSystem FileSystem { get; private set; }
@@ -31,7 +32,7 @@ namespace MediaBrowser.Server.Implementations.Photos
public virtual bool Supports(IHasImages item)
{
return item is T;
return true;
}
public virtual IEnumerable<ImageType> GetSupportedImages(IHasImages item)
@@ -43,12 +44,75 @@ namespace MediaBrowser.Server.Implementations.Photos
};
}
public async Task<ItemUpdateType> FetchAsync(T item, MetadataRefreshOptions options, CancellationToken cancellationToken)
{
if (!Supports(item))
{
return ItemUpdateType.None;
}
var primaryResult = await FetchAsync(item, ImageType.Primary, options, cancellationToken).ConfigureAwait(false);
var thumbResult = await FetchAsync(item, ImageType.Thumb, options, cancellationToken).ConfigureAwait(false);
return primaryResult | thumbResult;
}
protected async Task<ItemUpdateType> FetchAsync(IHasImages item, ImageType imageType, MetadataRefreshOptions options, CancellationToken cancellationToken)
{
var items = await GetItemsWithImages(item).ConfigureAwait(false);
var cacheKey = GetConfigurationCacheKey(items);
if (!HasChanged(item, imageType, cacheKey))
{
return ItemUpdateType.None;
}
return await FetchToFileInternal(item, items, imageType, cacheKey, cancellationToken).ConfigureAwait(false);
}
protected async Task<ItemUpdateType> FetchToFileInternal(IHasImages item,
List<BaseItem> itemsWithImages,
ImageType imageType,
string cacheKey,
CancellationToken cancellationToken)
{
var stream = await CreateImageAsync(item, itemsWithImages, imageType, 0).ConfigureAwait(false);
if (stream == null)
{
return ItemUpdateType.None;
}
if (stream is MemoryStream)
{
using (stream)
{
stream.Position = 0;
await ProviderManager.SaveImage(item, stream, "image/png", imageType, null, cacheKey, cancellationToken).ConfigureAwait(false);
}
}
else
{
using (var ms = new MemoryStream())
{
await stream.CopyToAsync(ms).ConfigureAwait(false);
ms.Position = 0;
await ProviderManager.SaveImage(item, ms, "image/png", imageType, null, cacheKey, cancellationToken).ConfigureAwait(false);
}
}
return ItemUpdateType.ImageUpdate;
}
public async Task<DynamicImageResponse> GetImage(IHasImages item, ImageType type, CancellationToken cancellationToken)
{
var items = await GetItemsWithImages(item).ConfigureAwait(false);
var cacheKey = GetConfigurationCacheKey(items);
var result = await FetchAsyncInternal(item, items, type, cacheKey, cancellationToken).ConfigureAwait(false);
var result = await CreateImageAsync(item, items, type, 0).ConfigureAwait(false);
return new DynamicImageResponse
{
@@ -67,15 +131,6 @@ namespace MediaBrowser.Server.Implementations.Photos
return (Version + "_" + string.Join(",", items.Select(i => i.Id.ToString("N")).ToArray())).GetMD5().ToString("N");
}
protected Task<Stream> FetchAsyncInternal(IHasImages item,
List<BaseItem> itemsWithImages,
ImageType imageType,
string cacheKey,
CancellationToken cancellationToken)
{
return CreateImageAsync(item, itemsWithImages, imageType, 0);
}
protected Task<Stream> GetThumbCollage(List<BaseItem> items)
{
var files = items
@@ -163,7 +218,7 @@ namespace MediaBrowser.Server.Implementations.Photos
return GetFinalItems(items, 4);
}
protected List<BaseItem> GetFinalItems(List<BaseItem> items, int limit)
protected virtual List<BaseItem> GetFinalItems(List<BaseItem> items, int limit)
{
// Rotate the images no more than once per week
var random = new Random(GetWeekOfYear()).Next();