HamBook – Rev 54

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using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using HamBook.Radios.Generic;
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 Ai : Generic.CAT.Ai
    {
        private readonly Regex _readRegex;

        public Ai(SerialPortStream serialPort) : base(serialPort)
        {
            _readRegex = new Regex($"^{Name}(?<state>[01]){Eot}$", RegexOptions.Compiled);
        }

        public override CatLength CatLength => new CatLength { Set = 4, Read = 3, Answer = 4 };

        public override InformationState Read()
        {
            SerialPort.Write($"{Name}{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);
            var state = (InformationState)int.Parse(match.Result("${state}"));

            return state;
        }

        public override async Task<InformationState> ReadAsync(CancellationToken cancellationToken)
        {
            var payload = Encoding.GetBytes($"{Name}{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);

            var state = (InformationState)int.Parse(match.Result("${state}"));
            return state;
        }

        public override bool Set(InformationState state)
        {
            SerialPort.Write($"{Name}{(int)state}{Eot}");
            return Read() == state;
        }

        public override async Task<bool> SetAsync(InformationState state, CancellationToken cancellationToken)
        {
            var payload = Encoding.GetBytes($"{Name}{(int)state}{Eot}");
            await SerialPort.WriteAsync(payload, 0, payload.Length, cancellationToken);
            return await ReadAsync(cancellationToken) == state;
        }

        public override Information Parse(string input)
        {
            var match = InformationRegex.Match(input);

            if (!match.Success) throw new UnmatchedRadioResponseException(Name, input);

            var radioBank = int.Parse(match.Result("${radioBank}"));
            var frequency = int.Parse(match.Result("${frequency}"));
            var clarifierDirection = char.Parse(match.Result("${clarifierDirection}"));
            var clarifierOffset = int.Parse(match.Result("${clarifierOffset}"));
            var clar = int.Parse(match.Result("${clar}")) == 0 ? false : true;
            var radioMode = char.Parse(match.Result("${mode}"));
            var storage = match.Result("${storage}");
            var ctcss = int.Parse(match.Result("${ctcssMode}"));
            var phase = int.Parse(match.Result("${phase}"));

            var information = new Information
            {
                RadioBank = radioBank,
                Frequency = frequency,
                ClarifierDirection = clarifierDirection,
                ClarifierOffset = clarifierOffset,
                Clar = clar,
                RadioMode = new RadioMode(radioMode),
                Storage = storage,
                Ctcss = new Ctcss(ctcss),
                Phase = new Phase(phase)
            };

            return information;
        }

        public override void Write(InformationState state)
        {
            SerialPort.Write($"{Name}{(int)state}{Eot}");
        }

        public override async Task WriteAsync(InformationState state, CancellationToken cancellationToken)
        {
            var payload = Encoding.GetBytes($"{Name}{(int)state}{Eot}");

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

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