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362 lines
13 KiB
362 lines
13 KiB
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.Net;
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using System.Threading;
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using NLog;
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using NzbDrone.Common.Disk;
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using NzbDrone.Common.EnvironmentInfo;
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using NzbDrone.Common.Extensions;
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using NzbDrone.Common.Http;
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using NzbDrone.Core.Books;
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using NzbDrone.Core.Books.Events;
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using NzbDrone.Core.Configuration;
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using NzbDrone.Core.Messaging.Events;
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namespace NzbDrone.Core.MediaCover
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{
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public interface IMapCoversToLocal
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{
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void ConvertToLocalUrls(int entityId, MediaCoverEntity coverEntity, IEnumerable<MediaCover> covers);
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string GetCoverPath(int entityId, MediaCoverEntity coverEntity, MediaCoverTypes coverType, string extension, int? height = null);
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void EnsureBookCovers(Book book);
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}
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public class MediaCoverService :
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IHandleAsync<AuthorRefreshCompleteEvent>,
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IHandleAsync<AuthorDeletedEvent>,
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IHandleAsync<BookDeletedEvent>,
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IMapCoversToLocal
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{
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private const string USER_AGENT = "Dalvik/2.1.0 (Linux; U; Android 10; SM-G975U Build/QP1A.190711.020)";
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private readonly IImageResizer _resizer;
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private readonly IBookService _bookService;
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private readonly IHttpClient _httpClient;
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private readonly IDiskProvider _diskProvider;
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private readonly ICoverExistsSpecification _coverExistsSpecification;
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private readonly IConfigFileProvider _configFileProvider;
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private readonly IEventAggregator _eventAggregator;
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private readonly Logger _logger;
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private readonly string _coverRootFolder;
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// ImageSharp is slow on ARM (no hardware acceleration on mono yet)
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// So limit the number of concurrent resizing tasks
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private static SemaphoreSlim _semaphore = new SemaphoreSlim((int)Math.Ceiling(Environment.ProcessorCount / 2.0));
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public MediaCoverService(IImageResizer resizer,
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IBookService bookService,
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IHttpClient httpClient,
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IDiskProvider diskProvider,
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IAppFolderInfo appFolderInfo,
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ICoverExistsSpecification coverExistsSpecification,
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IConfigFileProvider configFileProvider,
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IEventAggregator eventAggregator,
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Logger logger)
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{
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_resizer = resizer;
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_bookService = bookService;
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_httpClient = httpClient;
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_diskProvider = diskProvider;
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_coverExistsSpecification = coverExistsSpecification;
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_configFileProvider = configFileProvider;
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_eventAggregator = eventAggregator;
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_logger = logger;
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_coverRootFolder = appFolderInfo.GetMediaCoverPath();
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}
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public string GetCoverPath(int entityId, MediaCoverEntity coverEntity, MediaCoverTypes coverType, string extension, int? height = null)
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{
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var heightSuffix = height.HasValue ? "-" + height.ToString() : "";
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if (coverEntity == MediaCoverEntity.Book)
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{
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return Path.Combine(GetBookCoverPath(entityId), coverType.ToString().ToLower() + heightSuffix + GetExtension(coverType, extension));
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}
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return Path.Combine(GetAuthorCoverPath(entityId), coverType.ToString().ToLower() + heightSuffix + GetExtension(coverType, extension));
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}
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public void ConvertToLocalUrls(int entityId, MediaCoverEntity coverEntity, IEnumerable<MediaCover> covers)
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{
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foreach (var mediaCover in covers)
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{
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if (mediaCover.CoverType == MediaCoverTypes.Unknown)
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{
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continue;
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}
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var filePath = GetCoverPath(entityId, coverEntity, mediaCover.CoverType, mediaCover.Extension, null);
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if (coverEntity == MediaCoverEntity.Book)
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{
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mediaCover.Url = _configFileProvider.UrlBase + @"/MediaCover/Books/" + entityId + "/" + mediaCover.CoverType.ToString().ToLower() + GetExtension(mediaCover.CoverType, mediaCover.Extension);
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}
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else
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{
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mediaCover.Url = _configFileProvider.UrlBase + @"/MediaCover/" + entityId + "/" + mediaCover.CoverType.ToString().ToLower() + GetExtension(mediaCover.CoverType, mediaCover.Extension);
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}
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if (_diskProvider.FileExists(filePath))
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{
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var lastWrite = _diskProvider.FileGetLastWrite(filePath);
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mediaCover.Url += "?lastWrite=" + lastWrite.Ticks;
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}
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}
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}
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private string GetAuthorCoverPath(int authorId)
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{
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return Path.Combine(_coverRootFolder, authorId.ToString());
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}
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private string GetBookCoverPath(int bookId)
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{
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return Path.Combine(_coverRootFolder, "Books", bookId.ToString());
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}
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private void EnsureAuthorCovers(Author author)
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{
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var toResize = new List<Tuple<MediaCover, bool>>();
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foreach (var cover in author.Metadata.Value.Images)
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{
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if (cover.CoverType == MediaCoverTypes.Unknown)
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{
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continue;
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}
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var fileName = GetCoverPath(author.Id, MediaCoverEntity.Author, cover.CoverType, cover.Extension);
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var alreadyExists = false;
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try
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{
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var serverFileHeaders = GetServerHeaders(cover.Url);
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alreadyExists = _coverExistsSpecification.AlreadyExists(serverFileHeaders.LastModified, GetContentLength(serverFileHeaders), fileName);
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if (!alreadyExists)
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{
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DownloadCover(author, cover, serverFileHeaders.LastModified ?? DateTime.Now);
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}
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}
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catch (WebException e)
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{
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_logger.Warn("Couldn't download media cover for {0}. {1}", author, e.Message);
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}
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catch (Exception e)
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{
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_logger.Error(e, "Couldn't download media cover for {0}", author);
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}
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toResize.Add(Tuple.Create(cover, alreadyExists));
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}
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try
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{
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_semaphore.Wait();
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foreach (var tuple in toResize)
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{
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EnsureResizedCovers(author, tuple.Item1, !tuple.Item2);
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}
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}
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finally
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{
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_semaphore.Release();
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}
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}
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public void EnsureBookCovers(Book book)
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{
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foreach (var cover in book.Editions.Value.Single(x => x.Monitored).Images.Where(e => e.CoverType == MediaCoverTypes.Cover))
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{
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if (cover.CoverType == MediaCoverTypes.Unknown)
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{
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continue;
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}
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var fileName = GetCoverPath(book.Id, MediaCoverEntity.Book, cover.CoverType, cover.Extension, null);
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var alreadyExists = false;
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try
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{
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var serverFileHeaders = GetServerHeaders(cover.Url);
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alreadyExists = _coverExistsSpecification.AlreadyExists(serverFileHeaders.LastModified, GetContentLength(serverFileHeaders), fileName);
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if (!alreadyExists)
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{
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DownloadBookCover(book, cover, serverFileHeaders.LastModified ?? DateTime.Now);
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}
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}
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catch (WebException e)
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{
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_logger.Warn("Couldn't download media cover for {0}. {1}", book, e.Message);
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}
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catch (Exception e)
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{
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_logger.Error(e, "Couldn't download media cover for {0}", book);
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}
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}
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}
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private void DownloadCover(Author author, MediaCover cover, DateTime lastModified)
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{
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var fileName = GetCoverPath(author.Id, MediaCoverEntity.Author, cover.CoverType, cover.Extension);
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_logger.Info("Downloading {0} for {1} {2}", cover.CoverType, author, cover.Url);
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_httpClient.DownloadFile(cover.Url, fileName, USER_AGENT);
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try
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{
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_diskProvider.FileSetLastWriteTime(fileName, lastModified);
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}
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catch (Exception ex)
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{
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_logger.Debug(ex, "Unable to set modified date for {0} image for author {1}", cover.CoverType, author);
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}
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}
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private void DownloadBookCover(Book book, MediaCover cover, DateTime lastModified)
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{
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var fileName = GetCoverPath(book.Id, MediaCoverEntity.Book, cover.CoverType, cover.Extension, null);
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_logger.Info("Downloading {0} for {1} {2}", cover.CoverType, book, cover.Url);
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_httpClient.DownloadFile(cover.Url, fileName, USER_AGENT);
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try
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{
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_diskProvider.FileSetLastWriteTime(fileName, lastModified);
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}
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catch (Exception ex)
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{
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_logger.Debug(ex, "Unable to set modified date for {0} image for book {1}", cover.CoverType, book);
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}
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}
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private void EnsureResizedCovers(Author author, MediaCover cover, bool forceResize, Book book = null)
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{
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var heights = GetDefaultHeights(cover.CoverType);
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foreach (var height in heights)
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{
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var mainFileName = GetCoverPath(author.Id, MediaCoverEntity.Author, cover.CoverType, cover.Extension);
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var resizeFileName = GetCoverPath(author.Id, MediaCoverEntity.Author, cover.CoverType, cover.Extension, height);
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if (forceResize || !_diskProvider.FileExists(resizeFileName) || _diskProvider.GetFileSize(resizeFileName) == 0)
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{
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_logger.Debug("Resizing {0}-{1} for {2}", cover.CoverType, height, author);
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try
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{
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_resizer.Resize(mainFileName, resizeFileName, height);
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}
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catch
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{
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_logger.Debug("Couldn't resize media cover {0}-{1} for author {2}, using full size image instead.", cover.CoverType, height, author);
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}
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}
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}
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}
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private int[] GetDefaultHeights(MediaCoverTypes coverType)
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{
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switch (coverType)
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{
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default:
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return new int[] { };
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case MediaCoverTypes.Poster:
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case MediaCoverTypes.Disc:
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case MediaCoverTypes.Cover:
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case MediaCoverTypes.Logo:
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case MediaCoverTypes.Headshot:
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return new[] { 500, 250 };
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case MediaCoverTypes.Banner:
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return new[] { 70, 35 };
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case MediaCoverTypes.Fanart:
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case MediaCoverTypes.Screenshot:
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return new[] { 360, 180 };
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}
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}
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private string GetExtension(MediaCoverTypes coverType, string defaultExtension)
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{
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return coverType switch
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{
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MediaCoverTypes.Clearlogo => ".png",
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_ => defaultExtension
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};
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}
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private HttpHeader GetServerHeaders(string url)
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{
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// Goodreads doesn't allow a HEAD, so request a zero byte range instead
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var request = new HttpRequest(url)
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{
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AllowAutoRedirect = true,
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};
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request.Headers.Add("Range", "bytes=0-0");
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request.Headers.Add("User-Agent", USER_AGENT);
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return _httpClient.Get(request).Headers;
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}
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private long? GetContentLength(HttpHeader headers)
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{
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var range = headers.Get("content-range");
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if (range == null)
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{
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return null;
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}
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var split = range.Split('/');
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if (split.Length == 2 && long.TryParse(split[1], out var length))
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{
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return length;
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}
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return null;
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}
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public void HandleAsync(AuthorRefreshCompleteEvent message)
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{
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EnsureAuthorCovers(message.Author);
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var books = _bookService.GetBooksByAuthor(message.Author.Id);
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foreach (var book in books)
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{
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EnsureBookCovers(book);
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}
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_eventAggregator.PublishEvent(new MediaCoversUpdatedEvent(message.Author));
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}
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public void HandleAsync(AuthorDeletedEvent message)
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{
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var path = GetAuthorCoverPath(message.Author.Id);
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if (_diskProvider.FolderExists(path))
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{
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_diskProvider.DeleteFolder(path, true);
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}
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}
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public void HandleAsync(BookDeletedEvent message)
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{
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var path = GetBookCoverPath(message.Book.Id);
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if (_diskProvider.FolderExists(path))
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{
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_diskProvider.DeleteFolder(path, true);
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}
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}
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}
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}
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