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