jellyfin/Emby.Server.Implementations/Images/BaseDynamicImageProvider.cs
2019-09-25 17:19:48 +02:00

297 lines
10 KiB
C#

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Controller.Drawing;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Playlists;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Net;
namespace Emby.Server.Implementations.Images
{
public abstract class BaseDynamicImageProvider<T> : IHasItemChangeMonitor, IForcedProvider, ICustomMetadataProvider<T>, IHasOrder
where T : BaseItem
{
protected BaseDynamicImageProvider(IFileSystem fileSystem, IProviderManager providerManager, IApplicationPaths applicationPaths, IImageProcessor imageProcessor)
{
ApplicationPaths = applicationPaths;
ProviderManager = providerManager;
FileSystem = fileSystem;
ImageProcessor = imageProcessor;
}
protected IFileSystem FileSystem { get; }
protected IProviderManager ProviderManager { get; }
protected IApplicationPaths ApplicationPaths { get; }
protected IImageProcessor ImageProcessor { get; set; }
protected virtual IReadOnlyCollection<ImageType> SupportedImages { get; }
= new ImageType[] { ImageType.Primary };
/// <inheritdoc />
public string Name => "Dynamic Image Provider";
protected virtual int MaxImageAgeDays => 7;
public int Order => 0;
protected virtual bool Supports(BaseItem _) => true;
public async Task<ItemUpdateType> FetchAsync(T item, MetadataRefreshOptions options, CancellationToken cancellationToken)
{
if (!Supports(item))
{
return ItemUpdateType.None;
}
var updateType = ItemUpdateType.None;
if (SupportedImages.Contains(ImageType.Primary))
{
var primaryResult = await FetchAsync(item, ImageType.Primary, options, cancellationToken).ConfigureAwait(false);
updateType = updateType | primaryResult;
}
if (SupportedImages.Contains(ImageType.Thumb))
{
var thumbResult = await FetchAsync(item, ImageType.Thumb, options, cancellationToken).ConfigureAwait(false);
updateType = updateType | thumbResult;
}
return updateType;
}
protected Task<ItemUpdateType> FetchAsync(BaseItem item, ImageType imageType, MetadataRefreshOptions options, CancellationToken cancellationToken)
{
var image = item.GetImageInfo(imageType, 0);
if (image != null)
{
if (!image.IsLocalFile)
{
return Task.FromResult(ItemUpdateType.None);
}
if (!FileSystem.ContainsSubPath(item.GetInternalMetadataPath(), image.Path))
{
return Task.FromResult(ItemUpdateType.None);
}
}
var items = GetItemsWithImages(item);
return FetchToFileInternal(item, items, imageType, cancellationToken);
}
protected async Task<ItemUpdateType> FetchToFileInternal(
BaseItem item,
IReadOnlyList<BaseItem> itemsWithImages,
ImageType imageType,
CancellationToken cancellationToken)
{
var outputPathWithoutExtension = Path.Combine(ApplicationPaths.TempDirectory, Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture));
Directory.CreateDirectory(Path.GetDirectoryName(outputPathWithoutExtension));
string outputPath = CreateImage(item, itemsWithImages, outputPathWithoutExtension, imageType, 0);
if (string.IsNullOrEmpty(outputPath))
{
return ItemUpdateType.None;
}
var mimeType = MimeTypes.GetMimeType(outputPath);
if (string.Equals(mimeType, "application/octet-stream", StringComparison.OrdinalIgnoreCase))
{
mimeType = "image/png";
}
await ProviderManager.SaveImage(item, outputPath, mimeType, imageType, null, false, cancellationToken).ConfigureAwait(false);
return ItemUpdateType.ImageUpdate;
}
protected abstract IReadOnlyList<BaseItem> GetItemsWithImages(BaseItem item);
protected string CreateThumbCollage(BaseItem primaryItem, IEnumerable<BaseItem> items, string outputPath)
{
return CreateCollage(primaryItem, items, outputPath, 640, 360);
}
protected virtual IEnumerable<string> GetStripCollageImagePaths(BaseItem primaryItem, IEnumerable<BaseItem> items)
{
return items
.Select(i =>
{
var image = i.GetImageInfo(ImageType.Primary, 0);
if (image != null && image.IsLocalFile)
{
return image.Path;
}
image = i.GetImageInfo(ImageType.Thumb, 0);
if (image != null && image.IsLocalFile)
{
return image.Path;
}
return null;
})
.Where(i => !string.IsNullOrEmpty(i));
}
protected string CreatePosterCollage(BaseItem primaryItem, IEnumerable<BaseItem> items, string outputPath)
{
return CreateCollage(primaryItem, items, outputPath, 400, 600);
}
protected string CreateSquareCollage(BaseItem primaryItem, IEnumerable<BaseItem> items, string outputPath)
{
return CreateCollage(primaryItem, items, outputPath, 600, 600);
}
protected string CreateThumbCollage(BaseItem primaryItem, IEnumerable<BaseItem> items, string outputPath, int width, int height)
{
return CreateCollage(primaryItem, items, outputPath, width, height);
}
private string CreateCollage(BaseItem primaryItem, IEnumerable<BaseItem> items, string outputPath, int width, int height)
{
Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
var options = new ImageCollageOptions
{
Height = height,
Width = width,
OutputPath = outputPath,
InputPaths = GetStripCollageImagePaths(primaryItem, items).ToArray()
};
if (options.InputPaths.Length == 0)
{
return null;
}
if (!ImageProcessor.SupportsImageCollageCreation)
{
return null;
}
ImageProcessor.CreateImageCollage(options);
return outputPath;
}
protected virtual string CreateImage(BaseItem item,
IReadOnlyCollection<BaseItem> itemsWithImages,
string outputPathWithoutExtension,
ImageType imageType,
int imageIndex)
{
if (itemsWithImages.Count == 0)
{
return null;
}
string outputPath = Path.ChangeExtension(outputPathWithoutExtension, ".png");
if (imageType == ImageType.Thumb)
{
return CreateThumbCollage(item, itemsWithImages, outputPath);
}
if (imageType == ImageType.Primary)
{
if (item is UserView || item is Playlist || item is MusicGenre || item is Genre || item is PhotoAlbum)
{
return CreateSquareCollage(item, itemsWithImages, outputPath);
}
return CreatePosterCollage(item, itemsWithImages, outputPath);
}
throw new ArgumentException("Unexpected image type", nameof(imageType));
}
public bool HasChanged(BaseItem item, IDirectoryService directoryServicee)
{
if (!Supports(item))
{
return false;
}
if (SupportedImages.Contains(ImageType.Primary) && HasChanged(item, ImageType.Primary))
{
return true;
}
if (SupportedImages.Contains(ImageType.Thumb) && HasChanged(item, ImageType.Thumb))
{
return true;
}
return false;
}
protected bool HasChanged(BaseItem item, ImageType type)
{
var image = item.GetImageInfo(type, 0);
if (image != null)
{
if (!image.IsLocalFile)
{
return false;
}
if (!FileSystem.ContainsSubPath(item.GetInternalMetadataPath(), image.Path))
{
return false;
}
if (!HasChangedByDate(item, image))
{
return false;
}
}
return true;
}
protected virtual bool HasChangedByDate(BaseItem item, ItemImageInfo image)
{
var age = DateTime.UtcNow - image.DateModified;
return age.TotalDays > MaxImageAgeDays;
}
protected string CreateSingleImage(IEnumerable<BaseItem> itemsWithImages, string outputPathWithoutExtension, ImageType imageType)
{
var image = itemsWithImages
.Where(i => i.HasImage(imageType) && i.GetImageInfo(imageType, 0).IsLocalFile && Path.HasExtension(i.GetImagePath(imageType)))
.Select(i => i.GetImagePath(imageType))
.FirstOrDefault();
if (string.IsNullOrEmpty(image))
{
return null;
}
var ext = Path.GetExtension(image);
var outputPath = Path.ChangeExtension(outputPathWithoutExtension, ext);
File.Copy(image, outputPath, true);
return outputPath;
}
}
}