practice/FiveLetters/Model/FiveLettersResult.cs

using System;
using System.Collections.Generic;

namespace FiveLetters.Model
{
    public class FiveLettersResult
    {

        public DateTime DateStart { get; }
        public string TaskGuid { get; }
        public string User { get; }
        public EResultGameType Result { get; set; } 
        public List<FiveLettersItemResult> Attempts { get; set; }

        public FiveLettersResult(string user, string taskGuid)
        {
            Attempts = new List<FiveLettersItemResult>();
            User = user;
            TaskGuid = taskGuid;
            DateStart = DateTime.Now;
        }

        internal void AddAttempt(List<FiveLettersItemLetterResult> result)
        {
            var res = new FiveLettersItemResult(result);
            if (Result != EResultGameType.InProcess)
            {
                return;
            }
            
            Attempts.Add(res);
        }

        public HashSet<char> GetLettersFullMatch()
        {
            HashSet<char> fm = new HashSet<char>();
            foreach (var att in Attempts)
            {
                var attFm = att.GetLettersFullMatch();
                foreach (char ch in attFm)
                {
                    fm.Add(ch);
                }
            }
            return fm;
        }

        public HashSet<char> GetLettersPartialMatch()
        {
            HashSet<char> fm = new HashSet<char>();
            foreach (var att in Attempts)
            {
                var attFm = att.GetLettersPartialMatch();
                foreach (char ch in attFm)
                {
                    fm.Add(ch);
                }
            }
            return fm;
        }

    }
}