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using System.Diagnostics.CodeAnalysis;
using System.Text.RegularExpressions;
namespace Emby.Naming.Video;
/// <summary>
/// Regex based rule for file stacking (eg. disc1, disc2).
/// </summary>
public class FileStackRule
{
private readonly Regex _tokenRegex;
/// <summary>
/// Initializes a new instance of the <see cref="FileStackRule"/> class.
/// </summary>
/// <param name="token">Token.</param>
/// <param name="isNumerical">Whether the file stack rule uses numerical or alphabetical numbering.</param>
public FileStackRule(string token, bool isNumerical)
{
_tokenRegex = new Regex(token, RegexOptions.IgnoreCase | RegexOptions.Compiled);
IsNumerical = isNumerical;
}
/// <summary>
/// Gets a value indicating whether the rule uses numerical or alphabetical numbering.
/// </summary>
public bool IsNumerical { get; }
/// <summary>
/// Match the input against the rule regex.
/// </summary>
/// <param name="input">The input.</param>
/// <param name="result">The part type and number or <c>null</c>.</param>
/// <returns>A value indicating whether the input matched the rule.</returns>
public bool Match(string input, [NotNullWhen(true)] out (string StackName, string PartType, string PartNumber)? result)
{
result = null;
var match = _tokenRegex.Match(input);
if (!match.Success)
{
return false;
}
var partType = match.Groups["parttype"].Success ? match.Groups["parttype"].Value : "unknown";
result = (match.Groups["filename"].Value, partType, match.Groups["number"].Value);
return true;
}
}
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