CommandRegEx.cs

using System;
using System.Reflection.Metadata;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
 
namespace Waher.Service.IoTBroker.Admin
{
    public abstract class CommandRegEx : IAdminCommand
    {
        private readonly Regex expression;
 
        public CommandRegEx(string RegularExpression)
            : base()
        {
            this.expression = new Regex(RegularExpression, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.IgnoreCase);
        }
 
        public abstract string Name { get; }
 
        public virtual string[] Aliases => null;
 
        public virtual Task Execute(ChatState State, string[] Arguments, string OrgMessage, object Details, ResponseCallbackHandler ResponseCallback)
        {
            if (Details is Match Match)
                return this.Execute(State, Arguments, OrgMessage, Match, ResponseCallback);
            else
                throw new ArgumentException("Expected a Regex Match object.", nameof(Details));
        }
 
        public abstract Task Execute(ChatState State, string[] Arguments, string OrgMessage, Match Details, ResponseCallbackHandler ResponseCallback);
 
        public virtual bool AppliesTo(string CommandLine, string[] Arguments, out object Details)
        {
            Match M = this.expression.Match(CommandLine);
            Details = M;
            return M.Success && M.Index == 0 && M.Length == CommandLine.Length;
        }
 
        public abstract HelpItem[] GetHelp();
    }
}