BaudRateChange.cs

using System;
using OSDP.Net.Messages;
using OSDP.Net.Messages.SecureChannel;
using OSDP.Net.Model.CommandData;
 
namespace OSDP.Net.LineQuality
{
    public class BaudRateChange : CommandData
    {
        public const int PayloadLength = 6;

        public BaudRateChange(byte sequenceNumber, LineQualityBaudRate baudRateId)
        {
            SequenceNumber = sequenceNumber;
            BaudRateId = baudRateId;
        }

        public byte SequenceNumber { get; }

        public LineQualityBaudRate BaudRateId { get; }

        public override CommandType CommandType => CommandType.ManufacturerSpecific;

        public override byte Code => (byte)CommandType;

        public override ReadOnlySpan<byte> SecurityControlBlock() => SecurityBlock.CommandMessageWithDataSecurity;

        public override byte[] BuildData()
        {
            var data = new byte[PayloadLength];
            LineQualityProtocol.VendorCodeBytes.CopyTo(data, 0);
            data[3] = LineQualityProtocol.BaudRateChangeCommandId;
            data[4] = SequenceNumber;
            data[5] = (byte)BaudRateId;
            return data;
        }

        public static bool TryParse(ReadOnlySpan<byte> payload, out BaudRateChange command)
        {
            command = null;
 
            if (payload.Length < PayloadLength) return false;
            if (!LineQualityProtocol.IsLineQualityVendorCode(payload)) return false;
            if (payload[3] != LineQualityProtocol.BaudRateChangeCommandId) return false;
 
            command = new BaudRateChange(payload[4], (LineQualityBaudRate)payload[5]);
            return true;
        }
    }
}