CatherineLynwood/CatherineLynwood/Services/AccessCodeService.cs

using CatherineLynwood.Models;

namespace CatherineLynwood.Services
{
    public interface IAccessCodeService
    {
        #region Public Methods

        Task<(int pageNumber, int wordIndex)> GetCurrentChallengeAsync();

        Task<(int accessLevel, int highestBook)> ValidateWordAsync(string userWord);

        #endregion Public Methods
    }

    public class AccessCodeService : IAccessCodeService
    {
        #region Private Fields

        private readonly List<AccessCode> _accessCodes;

        #endregion Private Fields

        #region Public Constructors

        public AccessCodeService(DataAccess dataAccess)
        {
            _accessCodes = dataAccess.GetAccessCodes();
        }

        #endregion Public Constructors

        #region Public Methods

        public Task<(int pageNumber, int wordIndex)> GetCurrentChallengeAsync()
        {
            var challenge = _accessCodes.First(); // current prompt
            return Task.FromResult((challenge.PageNumber, challenge.WordIndex));
        }

        public Task<(int accessLevel, int highestBook)> ValidateWordAsync(string userWord)
        {
            var match = _accessCodes.FirstOrDefault(c =>
                c.ExpectedWord.Equals(userWord, StringComparison.OrdinalIgnoreCase));

            if (match != null)
                return Task.FromResult((match.AccessLevel, match.BookID));

            return Task.FromResult((0, 0));
        }

        #endregion Public Methods
    }
}