AddTextNote.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.Persistence;
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.NeuroFeatures.Events;
 
namespace Waher.Service.IoTBroker.WebServices.Agent.Tokens
{
    public class AddTextNote : AgentPostResource
    {
        public AddTextNote()
            : base("Tokens/AddTextNote",
                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(AddTextNote).Namespace + ".JSON.AddTextNote.req");
        private static readonly string xmlPattern = Resources.LoadResourceAsText(typeof(AddTextNote).Namespace + ".XML.AddTextNote.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 Note = (string)Parameters["PNote"].AssociatedObjectValue;
            bool Personal = (bool)Parameters["PPersonal"].AssociatedObjectValue;
            string BareJid = User.UserName + "@" + Gateway.Domain;
 
            Token Token = await NeuroFeaturesProcessor.GetToken(TokenId, true)
                ?? throw new NotFoundException("Token not found.");
 
            TokenNoteEvent Event;
 
            if (Token.OwnerJid == BareJid)
            {
                Event = new NoteText()
                {
                    ArchiveOptional = Token.ArchiveOptional,
                    ArchiveRequired = Token.ArchiveRequired,
                    Expires = Token.Expires,
                    Note = Note,
                    Personal = Personal,
                    Timestamp = DateTime.UtcNow,
                    TokenId = Token.TokenId
                };
            }
            else
            {
                await AssertApprovedExternalSource(Token, BareJid);
 
                Event = new ExternalNoteText()
                {
                    ArchiveOptional = Token.ArchiveOptional,
                    ArchiveRequired = Token.ArchiveRequired,
                    Expires = Token.Expires,
                    Note = Note,
                    Personal = Personal,
                    Timestamp = DateTime.UtcNow,
                    TokenId = Token.TokenId,
                    Source = BareJid
                };
            }
 
            await Database.Insert(Event);
            await StateMachineProcessor.EventGenerated(Token, Event);
 
            StringBuilder Xml = new StringBuilder();
            Event.Serialize(Xml);
 
            XmlDocument Doc = new XmlDocument()
            {
                PreserveWhitespace = true
            };
            Doc.LoadXml(Xml.ToString());
 
            await Response.Return(new NamedDictionary<string, object>("NoteResult", AgentNamespace)
            {
                { "Note", Doc }
            });
        }
 
        internal static async Task AssertApprovedExternalSource(Token Token, string FromBareJid)
        {
            if (Token.IsExternalPart(FromBareJid))
                return;
 
            if (Token.HasStateMachine)
            {
                StateMachineProcessor.CacheRecord Machine = await StateMachineProcessor.GetStateMachine(Token)
                    ?? throw new NotFoundException("State-machine not found.");
 
                if (Machine.CurrentState is null)
                    throw new ServiceUnavailableException("Current state of State-machine not available.");
 
                if (Machine.CurrentState.HasEnded)
                    throw new ServiceUnavailableException("State-machine has ended.");
 
                if (!Machine.CurrentState.ContainsSource(FromBareJid))
                    throw new ForbiddenException("You are not an approved external part for this token.");
            }
            else
                throw new ForbiddenException("You are not an approved external part for this token.");
        }
 
    }
}