C# BaseItem.HasImage方法代码示例

        /// <summary>
        /// Needses the refresh internal.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="providerInfo">The provider info.</param>
        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
        protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
        {
            if (string.IsNullOrEmpty(item.GetProviderId(MetadataProviders.Tvdb)))
            {
                return false;
            }

            if (!ConfigurationManager.Configuration.DownloadSeriesImages.Art &&
                !ConfigurationManager.Configuration.DownloadSeriesImages.Logo &&
                !ConfigurationManager.Configuration.DownloadSeriesImages.Thumb &&
                !ConfigurationManager.Configuration.DownloadSeriesImages.Backdrops &&
                !ConfigurationManager.Configuration.DownloadSeriesImages.Banner)
            {
                return false;
            }

            if (item.HasImage(ImageType.Art) &&
                item.HasImage(ImageType.Logo) &&
                item.HasImage(ImageType.Banner) &&
                item.HasImage(ImageType.Thumb) &&
                item.BackdropImagePaths.Count > 0)
            {
                return false;
            }

            return base.NeedsRefreshInternal(item, providerInfo);
        }

        protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
        {
            if (item.HasImage(ImageType.Primary) && item.HasImage(ImageType.Thumb))
            {
                return false;
            }

            // Try again periodically in case new images were added
            if ((DateTime.UtcNow - providerInfo.LastRefreshed).TotalDays > 7)
            {
                return true;
            }

            return base.NeedsRefreshInternal(item, providerInfo);
        }

        public override async Task<bool> FetchAsync(BaseItem item, bool force, BaseProviderInfo providerInfo, CancellationToken cancellationToken)
        {
            if (item.HasImage(ImageType.Primary) && item.HasImage(ImageType.Thumb))
            {
                SetLastRefreshed(item, DateTime.UtcNow, providerInfo);
                return true;
            }

            var images = await _providerManager.GetAvailableRemoteImages(item, cancellationToken, MusicGenresManualImageProvider.ProviderName).ConfigureAwait(false);

            await DownloadImages(item, images.ToList(), cancellationToken).ConfigureAwait(false);

            SetLastRefreshed(item, DateTime.UtcNow, providerInfo);
            return true;
        }

        public override async Task<bool> FetchAsync(BaseItem item, bool force, CancellationToken cancellationToken)
        {
            if (item.HasImage(ImageType.Primary))
            {
                SetLastRefreshed(item, DateTime.UtcNow);
                return true;
            }

            try
            {
                await DownloadImage(item, cancellationToken).ConfigureAwait(false);
            }
            catch (HttpException ex)
            {
                // Don't fail the provider on a 404
                if (!ex.StatusCode.HasValue || ex.StatusCode.Value != HttpStatusCode.NotFound)
                {
                    throw;
                }
            }


            SetLastRefreshed(item, DateTime.UtcNow);
            return true;
        }

        public override async Task<bool> FetchAsync(BaseItem item, bool force, BaseProviderInfo providerInfo, CancellationToken cancellationToken)
        {
            if (item.HasImage(ImageType.Primary))
            {
                SetLastRefreshed(item, DateTime.UtcNow, providerInfo);
                return true;
            }

            var changed = true;

            try
            {
                changed = await DownloadImage((LiveTvProgram)item, cancellationToken).ConfigureAwait(false);
            }
            catch (HttpException ex)
            {
                // Don't fail the provider on a 404
                if (!ex.StatusCode.HasValue || ex.StatusCode.Value != HttpStatusCode.NotFound)
                {
                    throw;
                }
            }

            if (changed)
            {
                SetLastRefreshed(item, DateTime.UtcNow, providerInfo);
            }

            return changed;
        }

        /// <summary>
        /// Needses the refresh internal.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="providerInfo">The provider info.</param>
        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
        protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
        {
            if (item.HasImage(ImageType.Primary))
            {
                return false;
            }

            return base.NeedsRefreshInternal(item, providerInfo);
        }

        /// <summary>
        /// Fetches metadata and returns true or false indicating if any work that requires persistence was done
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="force">if set to <c>true</c> [force].</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        /// <returns>Task{System.Boolean}.</returns>
        public override async Task<bool> FetchAsync(BaseItem item, bool force, CancellationToken cancellationToken)
        {
            if (!item.HasImage(ImageType.Primary))
            {
                var images = await _providerManager.GetAvailableRemoteImages(item, cancellationToken, ManualLastFmImageProvider.ProviderName).ConfigureAwait(false);

                await DownloadImages(item, images.ToList(), cancellationToken).ConfigureAwait(false);
            }

            SetLastRefreshed(item, DateTime.UtcNow);

            return true;
        }

        private async Task DownloadImages(BaseItem item, List<RemoteImageInfo> images, CancellationToken cancellationToken)
        {
            if (!item.HasImage(ImageType.Primary) && !item.LockedFields.Contains(MetadataFields.Images))
            {
                var image = images.FirstOrDefault(i => i.Type == ImageType.Primary);

                if (image != null)
                {
                    await _providerManager.SaveImage(item, image.Url, TvdbSeriesProvider.Current.TvDbResourcePool, ImageType.Primary, null, cancellationToken)
                      .ConfigureAwait(false);
                }
            }
        }

        /// <summary>
        /// Needses the refresh internal.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="providerInfo">The provider info.</param>
        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
        protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
        {
            if (item.HasImage(ImageType.Primary))
            {
                return false;
            }

            if (string.IsNullOrWhiteSpace(GetImageUrl(item)))
            {
                return false;
            }

            return base.NeedsRefreshInternal(item, providerInfo);
        }

        /// <summary>
        /// Converts a BaseItem to a BaseItemInfo
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="chapterOwner">The chapter owner.</param>
        /// <param name="mediaSourceId">The media source identifier.</param>
        /// <returns>BaseItemInfo.</returns>
        /// <exception cref="System.ArgumentNullException">item</exception>
        private BaseItemInfo GetItemInfo(BaseItem item, BaseItem chapterOwner, string mediaSourceId)
        {
            if (item == null)
            {
                throw new ArgumentNullException("item");
            }

            var info = new BaseItemInfo
            {
                Id = GetDtoId(item),
                Name = item.Name,
                MediaType = item.MediaType,
                Type = item.GetClientTypeName(),
                RunTimeTicks = item.RunTimeTicks,
                IndexNumber = item.IndexNumber,
                ParentIndexNumber = item.ParentIndexNumber,
                PremiereDate = item.PremiereDate,
                ProductionYear = item.ProductionYear
            };

            info.PrimaryImageTag = GetImageCacheTag(item, ImageType.Primary);
            if (info.PrimaryImageTag != null)
            {
                info.PrimaryImageItemId = GetDtoId(item);
            }

            var episode = item as Episode;
            if (episode != null)
            {
                info.IndexNumberEnd = episode.IndexNumberEnd;
            }

            var hasSeries = item as IHasSeries;
            if (hasSeries != null)
            {
                info.SeriesName = hasSeries.SeriesName;
            }

            var recording = item as ILiveTvRecording;
            if (recording != null && recording.RecordingInfo != null)
            {
                if (recording.RecordingInfo.IsSeries)
                {
                    info.Name = recording.RecordingInfo.EpisodeTitle;
                    info.SeriesName = recording.RecordingInfo.Name;

                    if (string.IsNullOrWhiteSpace(info.Name))
                    {
                        info.Name = recording.RecordingInfo.Name;
                    }
                }
            }

            var audio = item as Audio;
            if (audio != null)
            {
                info.Album = audio.Album;
                info.Artists = audio.Artists;

                if (info.PrimaryImageTag == null)
                {
                    var album = audio.Parents.OfType<MusicAlbum>().FirstOrDefault();

                    if (album != null && album.HasImage(ImageType.Primary))
                    {
                        info.PrimaryImageTag = GetImageCacheTag(album, ImageType.Primary);
                        if (info.PrimaryImageTag != null)
                        {
                            info.PrimaryImageItemId = GetDtoId(album);
                        }
                    }
                }
            }

            var musicVideo = item as MusicVideo;
            if (musicVideo != null)
            {
                info.Album = musicVideo.Album;

                if (!string.IsNullOrWhiteSpace(musicVideo.Artist))
                {
                    info.Artists.Add(musicVideo.Artist);
                }
            }

            var backropItem = item.HasImage(ImageType.Backdrop) ? item : null;
            var thumbItem = item.HasImage(ImageType.Thumb) ? item : null;
            var logoItem = item.HasImage(ImageType.Logo) ? item : null;

            if (thumbItem == null)
            {
                if (episode != null)
//.........这里部分代码省略.........

        /// <summary>
        /// Fetches from XML.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="xmlFilePath">The XML file path.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        /// <returns>Task.</returns>
        private async Task FetchFromXml(BaseItem item, string xmlFilePath, CancellationToken cancellationToken)
        {
            var doc = new XmlDocument();
            doc.Load(xmlFilePath);

            cancellationToken.ThrowIfCancellationRequested();

            string path;
            var hd = ConfigurationManager.Configuration.DownloadHDFanArt ? "hd" : "";
            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Logo && !item.HasImage(ImageType.Logo))
            {
                var node =
                    doc.SelectSingleNode("//fanart/music/musiclogos/" + hd + "musiclogo/@url") ??
                    doc.SelectSingleNode("//fanart/music/musiclogos/musiclogo/@url");
                path = node != null ? node.Value : null;
                if (!string.IsNullOrEmpty(path))
                {
                    try
                    {
                        await _providerManager.SaveImage(item, path, FanArtResourcePool, ImageType.Logo, null, cancellationToken)
                            .ConfigureAwait(false);
                    }
                    catch (HttpException ex)
                    {
                        // Sometimes fanart has bad url's in their xml. Nothing we can do here but catch it
                        if (!ex.StatusCode.HasValue || ex.StatusCode.Value != HttpStatusCode.NotFound)
                        {
                            throw;
                        }
                    }
                }
            }
            cancellationToken.ThrowIfCancellationRequested();

            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Backdrops && item.BackdropImagePaths.Count == 0)
            {
                var nodes = doc.SelectNodes("//fanart/music/artistbackgrounds//@url");
                if (nodes != null)
                {
                    var numBackdrops = 0;
                    item.BackdropImagePaths = new List<string>();
                    foreach (XmlNode node in nodes)
                    {
                        path = node.Value;
                        if (!string.IsNullOrEmpty(path))
                        {
                            try
                            {
                                await _providerManager.SaveImage(item, path, FanArtResourcePool, ImageType.Backdrop, numBackdrops, cancellationToken)
                                    .ConfigureAwait(false);
                                numBackdrops++;
                                if (numBackdrops >= ConfigurationManager.Configuration.MaxBackdrops) break;
                            }
                            catch (HttpException ex)
                            {
                                // Sometimes fanart has bad url's in their xml. Nothing we can do here but catch it
                                if (!ex.StatusCode.HasValue || ex.StatusCode.Value != HttpStatusCode.NotFound)
                                {
                                    throw;
                                }
                            }
                        }
                    }

                }

            }

            cancellationToken.ThrowIfCancellationRequested();

            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Art && !item.HasImage(ImageType.Art))
            {
                var node =
                    doc.SelectSingleNode("//fanart/music/musicarts/" + hd + "musicart/@url") ??
                    doc.SelectSingleNode("//fanart/music/musicarts/musicart/@url");
                path = node != null ? node.Value : null;
                if (!string.IsNullOrEmpty(path))
                {
                    try
                    {
                        await _providerManager.SaveImage(item, path, FanArtResourcePool, ImageType.Art, null, cancellationToken)
                            .ConfigureAwait(false);
                    }
                    catch (HttpException ex)
                    {
                        // Sometimes fanart has bad url's in their xml. Nothing we can do here but catch it
                        if (!ex.StatusCode.HasValue || ex.StatusCode.Value != HttpStatusCode.NotFound)
                        {
                            throw;
                        }
                    }
                }
            }
//.........这里部分代码省略.........

 protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
 {
     if (item.HasImage(ImageType.Primary) && item.HasImage(ImageType.Banner) && item.BackdropImagePaths.Count >= ConfigurationManager.Configuration.TvOptions.MaxBackdrops)
     {
         return false;
     }
     return base.NeedsRefreshInternal(item, providerInfo);
 }

        private async Task DownloadImages(BaseItem item, List<RemoteImageInfo> images, int backdropLimit, CancellationToken cancellationToken)
        {
            if (!item.LockedFields.Contains(MetadataFields.Images))
            {
                if (!item.HasImage(ImageType.Primary))
                {
                    var image = images.FirstOrDefault(i => i.Type == ImageType.Primary);

                    if (image != null)
                    {
                        await _providerManager.SaveImage(item, image.Url, TvdbSeriesProvider.Current.TvDbResourcePool, ImageType.Primary, null, cancellationToken)
                            .ConfigureAwait(false);
                    }
                }

                if (ConfigurationManager.Configuration.DownloadSeriesImages.Banner && !item.HasImage(ImageType.Banner))
                {
                    var image = images.FirstOrDefault(i => i.Type == ImageType.Banner);

                    if (image != null)
                    {
                        await _providerManager.SaveImage(item, image.Url, TvdbSeriesProvider.Current.TvDbResourcePool, ImageType.Banner, null, cancellationToken)
                            .ConfigureAwait(false);
                    }
                }
            }

            if (ConfigurationManager.Configuration.DownloadSeriesImages.Backdrops && item.BackdropImagePaths.Count < backdropLimit && !item.LockedFields.Contains(MetadataFields.Backdrops))
            {
                foreach (var backdrop in images.Where(i => i.Type == ImageType.Backdrop && 
                    (!i.Width.HasValue || 
                    i.Width.Value >= ConfigurationManager.Configuration.TvOptions.MinBackdropWidth)))
                {
                    var url = backdrop.Url;

                    if (item.ContainsImageWithSourceUrl(url))
                    {
                        continue;
                    }

                    await _providerManager.SaveImage(item, url, TvdbSeriesProvider.Current.TvDbResourcePool, ImageType.Backdrop, null, cancellationToken).ConfigureAwait(false);

                    if (item.BackdropImagePaths.Count >= backdropLimit) break;
                }
            }
        }

        /// <summary>
        /// Processes the images.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="images">The images.</param>
        /// <param name="cancellationToken">The cancellation token</param>
        /// <returns>Task.</returns>
        protected virtual async Task<ProviderRefreshStatus> ProcessImages(BaseItem item, MovieImages images, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();

            var status = ProviderRefreshStatus.Success;

            //        poster
            if (images.posters != null && images.posters.Count > 0 && !item.HasImage(ImageType.Primary))
            {
                var tmdbSettings = await MovieDbProvider.Current.GetTmdbSettings(cancellationToken).ConfigureAwait(false);

                var tmdbImageUrl = tmdbSettings.images.base_url + ConfigurationManager.Configuration.TmdbFetchedPosterSize;
                // get highest rated poster for our language

                var postersSortedByVote = images.posters.OrderByDescending(i => i.vote_average);

                var poster = postersSortedByVote.FirstOrDefault(p => p.iso_639_1 != null && p.iso_639_1.Equals(ConfigurationManager.Configuration.PreferredMetadataLanguage, StringComparison.OrdinalIgnoreCase));
                if (poster == null && !ConfigurationManager.Configuration.PreferredMetadataLanguage.Equals("en"))
                {
                    // couldn't find our specific language, find english (if that wasn't our language)
                    poster = postersSortedByVote.FirstOrDefault(p => p.iso_639_1 != null && p.iso_639_1.Equals("en", StringComparison.OrdinalIgnoreCase));
                }
                if (poster == null)
                {
                    //still couldn't find it - try highest rated null one
                    poster = postersSortedByVote.FirstOrDefault(p => p.iso_639_1 == null);
                }
                if (poster == null)
                {
                    //finally - just get the highest rated one
                    poster = postersSortedByVote.FirstOrDefault();
                }
                if (poster != null)
                {
                    var img = await MovieDbProvider.Current.GetMovieDbResponse(new HttpRequestOptions
                    {
                        Url = tmdbImageUrl + poster.file_path,
                        CancellationToken = cancellationToken

                    }).ConfigureAwait(false);

                    await _providerManager.SaveImage(item, img, MimeTypes.GetMimeType(poster.file_path), ImageType.Primary, null, cancellationToken)
                                        .ConfigureAwait(false);

                }
            }

            cancellationToken.ThrowIfCancellationRequested();

            // backdrops - only download if earlier providers didn't find any (fanart)
            if (images.backdrops != null && images.backdrops.Count > 0 && ConfigurationManager.Configuration.DownloadMovieImages.Backdrops && item.BackdropImagePaths.Count == 0)
            {
                var tmdbSettings = await MovieDbProvider.Current.GetTmdbSettings(cancellationToken).ConfigureAwait(false);

                var tmdbImageUrl = tmdbSettings.images.base_url + ConfigurationManager.Configuration.TmdbFetchedBackdropSize;

                for (var i = 0; i < images.backdrops.Count; i++)
                {
                    var bdName = "backdrop" + (i == 0 ? "" : i.ToString(CultureInfo.InvariantCulture));

                    var hasLocalBackdrop = item.LocationType == LocationType.FileSystem && ConfigurationManager.Configuration.SaveLocalMeta ? item.HasLocalImage(bdName) : item.BackdropImagePaths.Count > i;

                    if (!hasLocalBackdrop)
                    {
                        var img = await MovieDbProvider.Current.GetMovieDbResponse(new HttpRequestOptions
                        {
                            Url = tmdbImageUrl + images.backdrops[i].file_path,
                            CancellationToken = cancellationToken

                        }).ConfigureAwait(false);

                        await _providerManager.SaveImage(item, img, MimeTypes.GetMimeType(images.backdrops[i].file_path), ImageType.Backdrop, item.BackdropImagePaths.Count, cancellationToken)
                          .ConfigureAwait(false);
                    }

                    if (item.BackdropImagePaths.Count >= ConfigurationManager.Configuration.MaxBackdrops)
                    {
                        break;
                    }
                }
            }

            return status;
        }

        /// <summary>
        /// Fetches from XML.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="images">The images.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        /// <returns>Task.</returns>
        private async Task FetchFromXml(BaseItem item, List<RemoteImageInfo> images , CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();

            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Primary && !item.HasImage(ImageType.Primary))
            {
                await SaveImage(item, images, ImageType.Primary, cancellationToken).ConfigureAwait(false);
            }

            cancellationToken.ThrowIfCancellationRequested();

            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Logo && !item.HasImage(ImageType.Logo))
            {
                await SaveImage(item, images, ImageType.Logo, cancellationToken).ConfigureAwait(false);
            }

            cancellationToken.ThrowIfCancellationRequested();

            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Art && !item.HasImage(ImageType.Art))
            {
                await SaveImage(item, images, ImageType.Art, cancellationToken).ConfigureAwait(false);
            }

            cancellationToken.ThrowIfCancellationRequested();

            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Banner && !item.HasImage(ImageType.Banner))
            {
                await SaveImage(item, images, ImageType.Banner, cancellationToken).ConfigureAwait(false);
            }

            cancellationToken.ThrowIfCancellationRequested();

            var backdropLimit = ConfigurationManager.Configuration.MaxBackdrops;
            if (ConfigurationManager.Configuration.DownloadMusicArtistImages.Backdrops &&
                item.BackdropImagePaths.Count < backdropLimit)
            {
                foreach (var image in images.Where(i => i.Type == ImageType.Backdrop))
                {
                    await _providerManager.SaveImage(item, image.Url, FanArtResourcePool, ImageType.Backdrop, null, cancellationToken)
                                        .ConfigureAwait(false);

                    if (item.BackdropImagePaths.Count >= backdropLimit) break;
                }
            }
        }