DecrementCounter.cs

using System.Threading.Tasks;
using System.Xml;
using Waher.Networking.HTTP.Interfaces;
using Waher.Persistence;
using Waher.Runtime.Counters;
using Waher.Script;
 
namespace Waher.Security.WAF.Model.Actions
{
    public class DecrementCounter : WafActionWithNameAndDelta
    {
        public DecrementCounter()
            : base()
        {
        }
 
        public DecrementCounter(XmlElement Xml, WafAction Parent, WebApplicationFirewall Document)
            : base(Xml, Parent, Document)
        {
        }
 
        public override string LocalName => nameof(DecrementCounter);
 
        public override WafAction Create(XmlElement Xml, WafAction Parent, WebApplicationFirewall Document) => new DecrementCounter(Xml, Parent, Document);
 
        public override async Task<WafResult?> Review(ProcessingState State)
        {
            Variables Variables = State.Variables;
            CaseInsensitiveString Name = await this.name.EvaluateAsync(Variables, string.Empty);
            long Delta = await this.delta.EvaluateAsync(Variables, 1L);
 
            await RuntimeCounters.DecrementCounter(Name, Delta);
 
            return null;
        }
    }
}