using System;
using System.IO;
using System.Text.RegularExpressions;
using Emby.Naming.Audio;
using Emby.Naming.Common;
namespace Emby.Naming.Video
{
///
/// Resolve if file is extra for video.
///
public static class ExtraRuleResolver
{
private static readonly char[] _digits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
///
/// Attempts to resolve if file is extra.
///
/// Path to file.
/// The naming options.
/// Returns object.
public static ExtraResult GetExtraInfo(string path, NamingOptions namingOptions)
{
var result = new ExtraResult();
for (var i = 0; i < namingOptions.VideoExtraRules.Length; i++)
{
var rule = namingOptions.VideoExtraRules[i];
if ((rule.MediaType == MediaType.Audio && !AudioFileParser.IsAudioFile(path, namingOptions))
|| (rule.MediaType == MediaType.Video && !VideoResolver.IsVideoFile(path, namingOptions)))
{
continue;
}
var pathSpan = path.AsSpan();
if (rule.RuleType == ExtraRuleType.Filename)
{
var filename = Path.GetFileNameWithoutExtension(pathSpan);
if (filename.Equals(rule.Token, StringComparison.OrdinalIgnoreCase))
{
result.ExtraType = rule.ExtraType;
result.Rule = rule;
}
}
else if (rule.RuleType == ExtraRuleType.Suffix)
{
// Trim the digits from the end of the filename so we can recognize things like -trailer2
var filename = Path.GetFileNameWithoutExtension(pathSpan).TrimEnd(_digits);
if (filename.EndsWith(rule.Token, StringComparison.OrdinalIgnoreCase))
{
result.ExtraType = rule.ExtraType;
result.Rule = rule;
}
}
else if (rule.RuleType == ExtraRuleType.Regex)
{
var filename = Path.GetFileName(path);
var isMatch = Regex.IsMatch(filename, rule.Token, RegexOptions.IgnoreCase | RegexOptions.Compiled);
if (isMatch)
{
result.ExtraType = rule.ExtraType;
result.Rule = rule;
}
}
else if (rule.RuleType == ExtraRuleType.DirectoryName)
{
var directoryName = Path.GetFileName(Path.GetDirectoryName(pathSpan));
if (directoryName.Equals(rule.Token, StringComparison.OrdinalIgnoreCase))
{
result.ExtraType = rule.ExtraType;
result.Rule = rule;
}
}
if (result.ExtraType is not null)
{
return result;
}
}
return result;
}
}
}