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

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using System;
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using System.Text.RegularExpressions;
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namespace Emby.Server.Implementations.Library
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{
public static class PathExtensions
{
/// <summary>
/// Gets the attribute value.
/// </summary>
/// <param name="str">The STR.</param>
/// <param name="attrib">The attrib.</param>
/// <returns>System.String.</returns>
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/// <exception cref="ArgumentNullException">attrib</exception>
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public static string GetAttributeValue(this string str, string attrib)
{
if (string.IsNullOrEmpty(str))
{
throw new ArgumentNullException(nameof(str));
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}
if (string.IsNullOrEmpty(attrib))
{
throw new ArgumentNullException(nameof(attrib));
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}
string srch = "[" + attrib + "=";
int start = str.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
if (start > -1)
{
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(attrib, "imdbid", StringComparison.OrdinalIgnoreCase))
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{
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var m = Regex.Match(str, "tt\\d{7}", RegexOptions.IgnoreCase);
return m.Success ? m.Value : null;
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}
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return null;
}
}
}