// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.AspNetCore.Rewrite.ApacheModRewrite;
 
internal sealed class RuleRegexParser
{
    public static ParsedModRewriteInput ParseRuleRegex(string regex)
    {
        if (string.IsNullOrEmpty(regex))
        {
            throw new FormatException("Regex expression is null");
        }
        if (regex[0] == '!')
        {
            return new ParsedModRewriteInput { Invert = true, Operand = regex.Substring(1) };
        }
        else
        {
            return new ParsedModRewriteInput { Invert = false, Operand = regex };
        }
    }
}