ConnectedDeviceCommand.cs

using System;
using System.Threading.Tasks;
using Waher.Networking.XMPP;
using Waher.Runtime.Language;
using Waher.Things.Queries;
 
namespace Waher.Things.Xmpp.Commands
{
    public abstract class ConnectedDeviceCommand : ICommand
    {
        private readonly ConnectedDevice connectedDevice;
        private readonly string sortKey;
 
        public ConnectedDeviceCommand(ConnectedDevice ConnectedDevice, string SortKey)
        {
            this.connectedDevice = ConnectedDevice;
            this.sortKey = SortKey;
        }
 
        public ConnectedDevice ConnectedDevice => this.connectedDevice;
 
        public abstract string CommandID { get; }
 
        public virtual CommandType Type => CommandType.Simple;
 
        public string SortCategory => "XMPP";
 
        public string SortKey => this.sortKey;
 
        public abstract Task<string> GetNameAsync(Language Language);
 
        public virtual Task<string> GetConfirmationStringAsync(Language Language)
        {
            return Task.FromResult(string.Empty);
        }
 
        public virtual Task<string> GetFailureStringAsync(Language Language)
        {
            return Task.FromResult(string.Empty);
        }
 
        public virtual Task<string> GetSuccessStringAsync(Language Language)
        {
            return Task.FromResult(string.Empty);
        }
 
        public virtual Task<bool> CanExecuteAsync(RequestOrigin Caller)
        {
            return Task.FromResult(true);
        }
 
        public virtual Task ExecuteCommandAsync() => Task.CompletedTask;
 
        public virtual Task StartQueryExecutionAsync(Query Query, Language Language) => Task.CompletedTask;
 
        public abstract ICommand Copy();
 
        public async Task<XmppClient> GetXmppClient()
        {
            XmppClient Client = await this.connectedDevice.GetClient()
                ?? throw new Exception("XMPP client not found.");
 
            return Client;
        }
 
        public string GetRemoteFullJid(XmppClient Client)
        {
            string FullJid = this.connectedDevice.GetRemoteFullJid(Client, out bool HasContact, out bool HasSubscription);
 
            if (!HasContact)
                throw new Exception(this.connectedDevice.JID + " is not in the list of contacts.");
 
            if (!HasSubscription)
                throw new Exception("Not subscribed to the precense of " + this.connectedDevice.JID);
 
            if (string.IsNullOrEmpty(FullJid))
                throw new Exception(this.connectedDevice.JID + " is not online.");
 
            return FullJid;
        }
    }
}