jellyfin/Emby.Server.Implementations/Library/PathExtensions.cs

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#nullable enable
using System;
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using System.Text.RegularExpressions;
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namespace Emby.Server.Implementations.Library
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{
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/// <summary>
/// Class providing extension methods for working with paths.
/// </summary>
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public static class PathExtensions
{
/// <summary>
/// Gets the attribute value.
/// </summary>
/// <param name="str">The STR.</param>
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/// <param name="attribute">The attrib.</param>
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/// <returns>System.String.</returns>
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/// <exception cref="ArgumentException"><paramref name="str" /> or <paramref name="attribute" /> is empty.</exception>
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public static string? GetAttributeValue(this string str, string attribute)
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{
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if (str.Length == 0)
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{
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throw new ArgumentException("String can't be empty.", nameof(str));
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}
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if (attribute.Length == 0)
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{
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throw new ArgumentException("String can't be empty.", nameof(attribute));
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}
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string srch = "[" + attribute + "=";
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int start = str.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
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if (start != -1)
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{
start += srch.Length;
int end = str.IndexOf(']', start);
return str.Substring(start, end - start);
}
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// for imdbid we also accept pattern matching
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if (string.Equals(attribute, "imdbid", StringComparison.OrdinalIgnoreCase))
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{
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var m = Regex.Match(str, "tt([0-9]{7,8})", RegexOptions.IgnoreCase);
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return m.Success ? m.Value : null;
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}
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return null;
}
}
}