WpfFriaLabbar/Models/PositionalPasswordCharacter.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace friaLabbar.Models
{
    public class PositionalPasswordCharacter : HashSet<char>
    {
        private uint expectedLength;
        private string _letterString;
        public uint Position { get; private set; }

        public string Text
        {
            get { return _letterString; }
            set 
            {
                _letterString = value;
                this.Clear();
                this.UnionWith(value);
            }
        }

        public bool IsComplete { get { return Count >= expectedLength;  } }
        public bool IsValid { get { return Count <= expectedLength; } }

        public PositionalPasswordCharacter(uint expectedLength, uint position)
            : base()
        {
            this.expectedLength = expectedLength;
            Text = string.Empty;
            Position = position;
        }
    }
}