GetCurrentState.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using Waher.Content;
using Waher.IoTGateway;
using Waher.Networking.HTTP;
using Waher.Networking.XMPP.Server;
using Waher.Script;
using Waher.Script.Abstraction.Elements;
using Waher.Service.IoTBroker.DataStorage;
using Waher.Service.IoTBroker.NeuroFeatures;
using Waher.Service.IoTBroker.StateMachines;
using Waher.Service.IoTBroker.WebServices.Agent.Tokens;
 
namespace Waher.Service.IoTBroker.WebServices.Agent.StateMachines
{
    public class GetCurrentState : AgentPostResource
    {
        public GetCurrentState()
            : base("StateMachines/GetCurrentState",
                new KeyValuePair<Type, Expression>(typeof(Dictionary<string, object>), new Expression(jsonPattern)),
                new KeyValuePair<Type, Expression>(typeof(XmlDocument), new Expression(xmlPattern)))
        {
        }
 
        private static readonly string jsonPattern = Resources.LoadResourceAsText(typeof(GetCurrentState).Namespace + ".JSON.GetCurrentState.req");
        private static readonly string xmlPattern = Resources.LoadResourceAsText(typeof(GetCurrentState).Namespace + ".XML.GetCurrentState.req");
 
        public override async Task POST(HttpRequest Request, HttpResponse Response, Dictionary<string, IElement> Parameters)
        {
            AccountUser User = AssertUserAuthenticated(Request);
            string TokenId = (string)Parameters["PTokenId"].AssociatedObjectValue;
            string BareJid = User.UserName + "@" + Gateway.Domain;
 
            Token Token = await NeuroFeaturesProcessor.GetToken(TokenId, true) 
                ?? throw new NotFoundException("Token not found.");
 
            await GetToken.AssertAuthorization(Token, new XmppAddress(BareJid));
 
            StateMachineProcessor.CacheRecord Record = await StateMachineProcessor.GetStateMachine(Token.MachineId)
                ?? throw new NotFoundException("State-Machine not found.");
 
            StringBuilder Xml = new StringBuilder();
            StateMachineProcessor.Export(Record.CurrentState, Xml);
            
            XmlDocument Doc = new XmlDocument()
            {
                PreserveWhitespace = true
            };
            Doc.LoadXml(Xml.ToString());
 
            await Response.Return(new NamedDictionary<string, object>("StateResult", AgentNamespace)
            {
                { "CurrentState", Doc }
            });
        }
    }
}