286 lines
10 KiB
C#
286 lines
10 KiB
C#
using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Drawing;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Playlists;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Model.Entities;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Photos
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{
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public abstract class BaseDynamicImageProvider<T> : IHasChangeMonitor, IForcedProvider, ICustomMetadataProvider<T>, IHasOrder
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where T : IHasMetadata
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{
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protected IFileSystem FileSystem { get; private set; }
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protected IProviderManager ProviderManager { get; private set; }
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protected IApplicationPaths ApplicationPaths { get; private set; }
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protected IImageProcessor ImageProcessor { get; set; }
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protected BaseDynamicImageProvider(IFileSystem fileSystem, IProviderManager providerManager, IApplicationPaths applicationPaths, IImageProcessor imageProcessor)
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{
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ApplicationPaths = applicationPaths;
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ProviderManager = providerManager;
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FileSystem = fileSystem;
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ImageProcessor = imageProcessor;
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}
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public virtual bool Supports(IHasImages item)
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{
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return true;
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}
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public virtual IEnumerable<ImageType> GetSupportedImages(IHasImages item)
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{
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return new List<ImageType>
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{
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ImageType.Primary,
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ImageType.Thumb
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};
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}
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public async Task<ItemUpdateType> FetchAsync(T item, MetadataRefreshOptions options, CancellationToken cancellationToken)
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{
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if (!Supports(item))
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{
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return ItemUpdateType.None;
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}
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var primaryResult = await FetchAsync(item, ImageType.Primary, options, cancellationToken).ConfigureAwait(false);
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var thumbResult = await FetchAsync(item, ImageType.Thumb, options, cancellationToken).ConfigureAwait(false);
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return primaryResult | thumbResult;
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}
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protected async Task<ItemUpdateType> FetchAsync(IHasImages item, ImageType imageType, MetadataRefreshOptions options, CancellationToken cancellationToken)
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{
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var items = await GetItemsWithImages(item).ConfigureAwait(false);
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var cacheKey = GetConfigurationCacheKey(items, item.Name);
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if (!HasChanged(item, imageType, cacheKey))
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{
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return ItemUpdateType.None;
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}
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return await FetchToFileInternal(item, items, imageType, cacheKey, cancellationToken).ConfigureAwait(false);
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}
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protected async Task<ItemUpdateType> FetchToFileInternal(IHasImages item,
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List<BaseItem> itemsWithImages,
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ImageType imageType,
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string cacheKey,
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CancellationToken cancellationToken)
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{
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var outputPath = Path.Combine(ApplicationPaths.TempDirectory, Guid.NewGuid() + ".png");
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Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
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var imageCreated = await CreateImage(item, itemsWithImages, outputPath, imageType, 0).ConfigureAwait(false);
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if (!imageCreated)
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{
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return ItemUpdateType.None;
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}
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await ProviderManager.SaveImage(item, outputPath, "image/png", imageType, null, cacheKey, cancellationToken).ConfigureAwait(false);
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return ItemUpdateType.ImageUpdate;
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}
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protected abstract Task<List<BaseItem>> GetItemsWithImages(IHasImages item);
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private const string Version = "32";
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protected string GetConfigurationCacheKey(List<BaseItem> items, string itemName)
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{
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var parts = Version + "_" + (itemName ?? string.Empty) + "_" +
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string.Join(",", items.Select(i => i.Id.ToString("N")).ToArray());
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return parts.GetMD5().ToString("N");
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}
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protected Task<bool> CreateThumbCollage(IHasImages primaryItem, List<BaseItem> items, string outputPath, bool drawText)
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{
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return CreateCollage(primaryItem, items, outputPath, 960, 540, drawText, primaryItem.Name);
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}
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protected virtual IEnumerable<string> GetStripCollageImagePaths(IHasImages primaryItem, IEnumerable<BaseItem> items)
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{
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return items
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.Select(i => i.GetImagePath(ImageType.Primary) ?? i.GetImagePath(ImageType.Thumb))
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.Where(i => !string.IsNullOrWhiteSpace(i));
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}
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protected Task<bool> CreatePosterCollage(IHasImages primaryItem, List<BaseItem> items, string outputPath)
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{
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return CreateCollage(primaryItem, items, outputPath, 600, 900, true, primaryItem.Name);
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}
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protected Task<bool> CreateSquareCollage(IHasImages primaryItem, List<BaseItem> items, string outputPath, bool drawText)
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{
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return CreateCollage(primaryItem, items, outputPath, 800, 800, drawText, primaryItem.Name);
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}
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protected Task<bool> CreateThumbCollage(IHasImages primaryItem, List<BaseItem> items, string outputPath, int width, int height, bool drawText, string text)
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{
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return CreateCollage(primaryItem, items, outputPath, width, height, drawText, text);
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}
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private Task<bool> CreateCollage(IHasImages primaryItem, List<BaseItem> items, string outputPath, int width, int height, bool drawText, string text)
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{
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Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
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var options = new ImageCollageOptions
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{
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Height = height,
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Width = width,
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OutputPath = outputPath,
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Text = drawText ? text : null,
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InputPaths = GetStripCollageImagePaths(primaryItem, items).ToArray()
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};
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if (options.InputPaths.Length == 0)
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{
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return Task.FromResult(false);
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}
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ImageProcessor.CreateImageCollage(options);
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return Task.FromResult(true);
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}
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public string Name
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{
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get { return "Dynamic Image Provider"; }
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}
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protected virtual async Task<bool> CreateImage(IHasImages item,
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List<BaseItem> itemsWithImages,
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string outputPath,
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ImageType imageType,
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int imageIndex)
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{
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if (itemsWithImages.Count == 0)
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{
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return false;
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}
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var drawText = !(item is UserView);
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if (imageType == ImageType.Thumb)
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{
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return await CreateThumbCollage(item, itemsWithImages, outputPath, drawText).ConfigureAwait(false);
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}
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if (imageType == ImageType.Primary)
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{
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if (item is UserView)
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{
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return await CreateSquareCollage(item, itemsWithImages, outputPath, drawText).ConfigureAwait(false);
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}
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else if (item is PhotoAlbum || item is Playlist)
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{
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return await CreateSquareCollage(item, itemsWithImages, outputPath, drawText).ConfigureAwait(false);
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}
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else
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{
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return await CreatePosterCollage(item, itemsWithImages, outputPath).ConfigureAwait(false);
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}
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}
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throw new ArgumentException("Unexpected image type");
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}
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private const int MaxImageAgeDays = 7;
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public bool HasChanged(IHasMetadata item, IDirectoryService directoryService, DateTime date)
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{
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if (!Supports(item))
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{
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return false;
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}
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if (item is UserView)
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{
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return HasChanged(item, ImageType.Primary);
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}
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var items = GetItemsWithImages(item).Result;
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var cacheKey = GetConfigurationCacheKey(items, item.Name);
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return HasChanged(item, ImageType.Primary, cacheKey) || HasChanged(item, ImageType.Thumb, cacheKey);
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}
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protected bool HasChanged(IHasImages item, ImageType type, string cacheKey)
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{
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var image = item.GetImageInfo(type, 0);
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if (image != null)
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{
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if (!FileSystem.ContainsSubPath(item.GetInternalMetadataPath(), image.Path))
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{
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return false;
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}
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var currentPathCacheKey = (Path.GetFileNameWithoutExtension(image.Path) ?? string.Empty).Split('_').LastOrDefault();
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if (string.Equals(cacheKey, currentPathCacheKey, StringComparison.OrdinalIgnoreCase))
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{
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return false;
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}
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}
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return true;
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}
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protected bool HasChanged(IHasImages item, ImageType type)
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{
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var image = item.GetImageInfo(type, 0);
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if (image != null)
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{
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if (!FileSystem.ContainsSubPath(item.GetInternalMetadataPath(), image.Path))
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{
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return false;
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}
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var age = DateTime.UtcNow - image.DateModified;
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if (age.TotalDays <= MaxImageAgeDays)
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{
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return false;
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}
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}
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return true;
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}
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protected List<BaseItem> GetFinalItems(List<BaseItem> items)
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{
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return GetFinalItems(items, 4);
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}
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protected virtual List<BaseItem> GetFinalItems(List<BaseItem> items, int limit)
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{
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// Rotate the images once every x days
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var random = DateTime.Now.DayOfYear % MaxImageAgeDays;
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return items
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.OrderBy(i => (random + "" + items.IndexOf(i)).GetMD5())
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.Take(limit)
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.OrderBy(i => i.Name)
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.ToList();
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}
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public int Order
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{
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get
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{
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// Run before the default image provider which will download placeholders
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return 0;
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}
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}
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}
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}
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