HamBook – Rev 54

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

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

        public Ex(SerialPortStream serialPort) : base(serialPort)
        {
            _readRegex = new Regex($"^{Name}(?<menu>[0-9]{{4}})(?<parameter>[0-9\\+\\-]+?){Eot}",
                RegexOptions.Compiled);
        }

        public override CatLength CatLength => new CatLength { Set = 12, Answer = 12, Read = 7 };

        public override bool Set(int menu, int parameter)
        {
            var m = $"{menu:0000}";
            var p = $"{parameter}";

            SerialPort.Write($"{Name}{m}{p}{Eot}");
            return Read(menu) == parameter;
        }

        public override async Task<bool> SetAsync(int menu, int parameter, CancellationToken cancellation)
        {
            var m = $"{menu:0000}";
            var p = $"{parameter}";

            var payload = Encoding.GetBytes($"{Name}{m}{p}{Eot}");

            await SerialPort.WriteAsync(payload, 0, payload.Length, cancellation);

            return await ReadAsync(menu, cancellation) == parameter;
        }

        public override int Read(int menu)
        {
            var m = $"{menu:0000}";

            SerialPort.Write($"{Name}{m}{Eot}");
            var buffer = new byte[CatLength.Answer];
            if (SerialPort.Read(buffer, 0, CatLength.Answer) > CatLength.Answer)
                throw new UnexpectedRadioResponseException(Name, buffer);

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

        public override async Task<int> ReadAsync(int menu, CancellationToken cancellationToken)
        {
            var m = $"{menu:0000}";

            var payload = Encoding.GetBytes($"{Name}{m}{Eot}");
            await SerialPort.WriteAsync(payload, 0, payload.Length, cancellationToken);
            var buffer = new byte[CatLength.Answer];
            if (await SerialPort.ReadAsync(buffer, 0, CatLength.Answer, cancellationToken) > CatLength.Answer)
                throw new UnexpectedRadioResponseException(Name, buffer);

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

            return int.Parse(match.Result("${parameter}"));
        }

        public override void Write(int menu, int parameter)
        {
            var m = $"{menu:0000}";
            var p = $"{parameter}";

            SerialPort.Write($"{Name}{m}{p}{Eot}");
        }

        public override async Task WriteAsync(int menu, int parameter, CancellationToken cancellationToken)
        {
            var m = $"{menu:0000}";
            var p = $"{parameter}";

            var result = $"{Name}{m}{p}{Eot}";

            var payload = Encoding.GetBytes(result);

            await SerialPort.WriteAsync(payload, 0, payload.Length, cancellationToken);
        }
    }
}

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