160 lines
4.6 KiB
C#
160 lines
4.6 KiB
C#
#pragma warning disable CS1591
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using System;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.TV;
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using MediaBrowser.Controller.Sorting;
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using MediaBrowser.Model.Querying;
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namespace Emby.Server.Implementations.Sorting
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{
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public class AiredEpisodeOrderComparer : IBaseItemComparer
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{
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/// <summary>
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/// Gets the name.
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/// </summary>
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/// <value>The name.</value>
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public string Name => ItemSortBy.AiredEpisodeOrder;
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/// <summary>
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/// Compares the specified x.
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/// </summary>
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/// <param name="x">The x.</param>
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/// <param name="y">The y.</param>
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/// <returns>System.Int32.</returns>
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public int Compare(BaseItem? x, BaseItem? y)
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{
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ArgumentNullException.ThrowIfNull(x);
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ArgumentNullException.ThrowIfNull(y);
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var episode1 = x as Episode;
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var episode2 = y as Episode;
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if (episode1 is null)
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{
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if (episode2 is null)
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{
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return 0;
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}
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return 1;
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}
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if (episode2 is null)
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{
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return -1;
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}
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return Compare(episode1, episode2);
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}
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private int Compare(Episode x, Episode y)
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{
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var isXSpecial = (x.ParentIndexNumber ?? -1) == 0;
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var isYSpecial = (y.ParentIndexNumber ?? -1) == 0;
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if (isXSpecial && isYSpecial)
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{
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return CompareSpecials(x, y);
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}
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if (!isXSpecial && !isYSpecial)
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{
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return CompareEpisodes(x, y);
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}
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if (!isXSpecial)
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{
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return CompareEpisodeToSpecial(x, y);
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}
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return CompareEpisodeToSpecial(y, x) * -1;
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}
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private static int CompareEpisodeToSpecial(Episode x, Episode y)
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{
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// http://thetvdb.com/wiki/index.php?title=Special_Episodes
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var xSeason = x.ParentIndexNumber ?? -1;
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var ySeason = y.AirsAfterSeasonNumber ?? y.AirsBeforeSeasonNumber ?? -1;
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if (xSeason != ySeason)
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{
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return xSeason.CompareTo(ySeason);
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}
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// Special comes after episode
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if (y.AirsAfterSeasonNumber.HasValue)
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{
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return -1;
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}
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var yEpisode = y.AirsBeforeEpisodeNumber;
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// Special comes before the season
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if (!yEpisode.HasValue)
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{
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return 1;
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}
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// Compare episode number
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var xEpisode = x.IndexNumber;
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if (!xEpisode.HasValue)
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{
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// Can't really compare if this happens
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return 0;
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}
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// Special comes before episode
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if (xEpisode.Value == yEpisode.Value)
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{
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return 1;
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}
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return xEpisode.Value.CompareTo(yEpisode.Value);
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}
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private int CompareSpecials(Episode x, Episode y)
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{
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return GetSpecialCompareValue(x).CompareTo(GetSpecialCompareValue(y));
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}
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private static long GetSpecialCompareValue(Episode item)
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{
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// First sort by season number
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// Since there are three sort orders, pad with 9 digits (3 for each, figure 1000 episode buffer should be enough)
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var val = (item.AirsAfterSeasonNumber ?? item.AirsBeforeSeasonNumber ?? 0) * 1000000000L;
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// Second sort order is if it airs after the season
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if (item.AirsAfterSeasonNumber.HasValue)
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{
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val += 1000000;
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}
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// Third level is the episode number
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val += (item.AirsBeforeEpisodeNumber ?? 0) * 1000;
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// Finally, if that's still the same, last resort is the special number itself
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val += item.IndexNumber ?? 0;
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return val;
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}
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private static int CompareEpisodes(Episode x, Episode y)
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{
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var xValue = ((x.ParentIndexNumber ?? -1) * 1000) + (x.IndexNumber ?? -1);
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var yValue = ((y.ParentIndexNumber ?? -1) * 1000) + (y.IndexNumber ?? -1);
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var comparisonResult = xValue.CompareTo(yValue);
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// If equal, compare premiere dates
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if (comparisonResult == 0 && x.PremiereDate.HasValue && y.PremiereDate.HasValue)
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{
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comparisonResult = DateTime.Compare(x.PremiereDate.Value, y.PremiereDate.Value);
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}
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return comparisonResult;
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}
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}
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}
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