jellyfin/Emby.Server.Implementations/Library/PathExtensions.cs
2020-04-21 10:18:26 +02:00

52 lines
1.7 KiB
C#

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