HamBook – Rev 46

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using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using static HamBook.Radios.Yaesu.FT_891.Constants;
using RJCP.IO.Ports;

namespace HamBook.Radios.Yaesu.FT_891.CAT
{
    [Radio("Yaesu FT-891")]
    public class ID : Generic.CAT.ID
    {
        private readonly Regex readRegex;

        public override CatLength CatLength => new CatLength {  Answer = 7, Read = 3 };
        public ID(SerialPortStream serialPort) : base(serialPort)
        {
            readRegex = new Regex($"^{Name}(?<id>[0-9]{{4}}){Constants.EOT}$", RegexOptions.Compiled);
        }

        public override bool Read()
        {
            SerialPort.Write($"{Name}{Constants.EOT}");
            var buffer = new byte[CatLength.Answer];
            if (SerialPort.Read(buffer, 0, CatLength.Answer) != CatLength.Answer)
            {
                throw new UnexpectedRadioResponseException(Name, buffer);
            }

            var answer = Constants.Encoding.GetString(buffer);
            var match = readRegex.Match(answer);
            if (!match.Success)
            {
                throw new UnmatchedRadioResponseException(Name, answer);
            }
            return int.Parse(match.Result("${id}")) == int.Parse(Constants.ID);
        }

        public override async Task<bool> ReadAsync(CancellationToken cancellationToken)
        {
            var payload = Constants.Encoding.GetBytes($"{Name}{Constants.EOT}");
            await SerialPort.WriteAsync(payload, 0, payload.Length);
            var buffer = new byte[CatLength.Answer];
            if (await SerialPort.ReadAsync(buffer, 0, CatLength.Answer) != CatLength.Answer)
            {
                throw new UnexpectedRadioResponseException(Name, buffer);
            }

            var answer = Constants.Encoding.GetString(buffer);
            var match = readRegex.Match(answer);
            if (!match.Success)
            {
                throw new UnmatchedRadioResponseException(Name, answer);
            }

            return int.Parse(match.Result("${id}")) == int.Parse(Constants.ID);
        }
    }
}