FullJid.cs

using Waher.Networking.XMPP;
using Waher.Script;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Exceptions;
using Waher.Script.Model;
using Waher.Script.Objects;
 
namespace Waher.IoTGateway.ScriptExtensions.Functions
{
    public class FullJid : FunctionOneScalarVariable
    {
        public FullJid(ScriptNode Jid, int Start, int Length, Expression Expression)
            : base(Jid, Start, Length, Expression)
        {
        }
 
        public override string FunctionName => nameof(FullJid);
 
        public override string[] DefaultArgumentNames => new string[] { "JID" };
 
        public override IElement EvaluateScalar(string Argument, Variables Variables)
        {
            int i = Argument.IndexOf('@');
            if (i < 0)
                return new StringValue(Argument);
 
            i = Argument.IndexOf('/', i + 1);
            if (i > 0)
                return new StringValue(Argument);
 
            RosterItem Item = Gateway.XmppClient[Argument];
            if (Item is null)
                throw new ScriptRuntimeException("Not connected with " + Argument, this);
 
            if (!Item.HasLastPresence || !Item.LastPresence.IsOnline)
                throw new ScriptRuntimeException(Argument + " not online.", this);
 
            return new StringValue(Item.LastPresenceFullJid);
        }
    }
}