NumberOfInstances.cs

using System.Diagnostics.CodeAnalysis;
 
namespace NeuroAccess.Nfc.TravelDocuments.DataObjects
{
    public class NumberOfInstances : DataObject
    {
        public NumberOfInstances()
            : base([])
        {
        }
 
        public NumberOfInstances(byte[] Value, int Count)
            : base(Value)
        {
            this.Count = Count;
        }
 
        public override ushort Tag => 0x02;
 
        public int Count { get; }
 
        public override bool TryParse(byte[] Value, TravelDocumentsClient Client,
            [NotNullWhen(true)] out IDataObject? Parsed)
        {
            int Count;
 
            switch (Value.Length)
            {
                case 0:
                    Count = 0;
                    break;
 
                case 1:
                    Count = Value[0];
                    break;
 
                case 2:
                    Count = Value[0];
                    Count <<= 8;
                    Count |= Value[1];
                    break;
 
                default:
                    Parsed = null;
                    return false;
            }
 
            Parsed = new NumberOfInstances(Value, Count);
            return true;
        }
    }
}