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using System;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using Emby.Naming.Common;
using Emby.Naming.Video;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Resolvers;
using MediaBrowser.Model.Entities;
using Microsoft.Extensions.Logging;
using static Emby.Naming.Video.ExtraRuleResolver;
namespace Emby.Server.Implementations.Library.Resolvers
{
/// <summary>
/// Resolves a Path into a Video or Video subclass.
/// </summary>
internal class ExtraResolver
{
private readonly NamingOptions _namingOptions;
private readonly IItemResolver[] _trailerResolvers;
private readonly IItemResolver[] _videoResolvers;
/// <summary>
/// Initializes a new instance of the <see cref="ExtraResolver"/> class.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="namingOptions">An instance of <see cref="NamingOptions"/>.</param>
public ExtraResolver(ILogger<ExtraResolver> logger, NamingOptions namingOptions)
{
_namingOptions = namingOptions;
_trailerResolvers = new IItemResolver[] { new GenericVideoResolver<Trailer>(logger, namingOptions) };
_videoResolvers = new IItemResolver[] { new GenericVideoResolver<Video>(logger, namingOptions) };
}
/// <summary>
/// Gets the resolvers for the extra type.
/// </summary>
/// <param name="extraType">The extra type.</param>
/// <returns>The resolvers for the extra type.</returns>
public IItemResolver[]? GetResolversForExtraType(ExtraType extraType) => extraType switch
{
ExtraType.Trailer => _trailerResolvers,
// For audio we'll have to rely on the AudioResolver, which is a "built-in"
ExtraType.ThemeSong => null,
_ => _videoResolvers
};
public bool TryGetExtraTypeForOwner(string path, VideoFileInfo ownerVideoFileInfo, [NotNullWhen(true)] out ExtraType? extraType)
{
var extraResult = GetExtraInfo(path, _namingOptions);
if (extraResult.ExtraType is null)
{
extraType = null;
return false;
}
var cleanDateTimeResult = CleanDateTimeParser.Clean(Path.GetFileNameWithoutExtension(path), _namingOptions.CleanDateTimeRegexes);
var name = cleanDateTimeResult.Name;
var year = cleanDateTimeResult.Year;
var parentDir = ownerVideoFileInfo.IsDirectory ? ownerVideoFileInfo.Path : Path.GetDirectoryName(ownerVideoFileInfo.Path.AsSpan());
var trimmedFileNameWithoutExtension = TrimFilenameDelimiters(ownerVideoFileInfo.FileNameWithoutExtension, _namingOptions.VideoFlagDelimiters);
var trimmedVideoInfoName = TrimFilenameDelimiters(ownerVideoFileInfo.Name, _namingOptions.VideoFlagDelimiters);
var trimmedExtraFileName = TrimFilenameDelimiters(name, _namingOptions.VideoFlagDelimiters);
// first check filenames
bool isValid = StartsWith(trimmedExtraFileName, trimmedFileNameWithoutExtension)
|| (StartsWith(trimmedExtraFileName, trimmedVideoInfoName) && year == ownerVideoFileInfo.Year);
if (!isValid)
{
// When the extra rule type is DirectoryName we must go one level higher to get the "real" dir name
var currentParentDir = extraResult.Rule?.RuleType == ExtraRuleType.DirectoryName
? Path.GetDirectoryName(Path.GetDirectoryName(path.AsSpan()))
: Path.GetDirectoryName(path.AsSpan());
isValid = !currentParentDir.IsEmpty && !parentDir.IsEmpty && currentParentDir.Equals(parentDir, StringComparison.OrdinalIgnoreCase);
}
extraType = extraResult.ExtraType;
return isValid;
}
private static ReadOnlySpan<char> TrimFilenameDelimiters(ReadOnlySpan<char> name, ReadOnlySpan<char> videoFlagDelimiters)
{
return name.IsEmpty ? name : name.TrimEnd().TrimEnd(videoFlagDelimiters).TrimEnd();
}
private static bool StartsWith(ReadOnlySpan<char> fileName, ReadOnlySpan<char> baseName)
{
return !baseName.IsEmpty && fileName.StartsWith(baseName, StringComparison.OrdinalIgnoreCase);
}
}
}
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