Installed.cs

using System;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Waher.Security;
using Waher.Service.IoTBroker.Provisioning;
using Waher.Service.IoTBroker.Provisioning.SoftwareUpdates;
 
namespace Waher.Service.IoTBroker.Admin.Software
{
    public class Installed : CommandRegEx
    {
        public Installed()
            : base(@"^installed(\s+[^\s]+)?$")
        {
        }
 
        public override string Name => "Installed";
 
        public override async Task Execute(ChatState State, string[] Arguments, string OrgMessage, Match Details,
            ResponseCallbackHandler ResponseCallback)
        {
            if (Arguments.Length == 0)
            {
                StringBuilder sb = new StringBuilder();
                bool First = true;
 
                foreach (Package Package in await ProvisioningComponent.GetPackages())
                {
                    if (Package.Installed > DateTime.MinValue)
                    {
                        if (First)
                            First = false;
                        else
                            sb.Append("; ");
 
                        sb.Append(Package.FileName);
                    }
                }
 
                await ResponseCallback(sb.ToString(), string.Empty);
            }
            else
            {
                Package Package = await ProvisioningComponent.GetPackage(Arguments[0]);
 
                if (Package is null)
                    await ResponseCallback("-", string.Empty);
                else if (Package.Installed == DateTime.MinValue)
                    await ResponseCallback("No", string.Empty);
                else
                    await ResponseCallback("Yes", string.Empty);
            }
        }
 
        public override HelpItem[] GetHelp()
        {
            return new HelpItem[]
            {
                new HelpItem("installed", "Lists packages that are installed."),
                new HelpItem("installed PACKAGE", "Checks if a specific package is installed or not.")
            };
        }
    }
}