API/TOOHUCardAPI/Data/Services/UserService.cs

using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using TOOHUCardAPI.Data.Models;
using TOOHUCardAPI.Data.Repositories;

namespace TOOHUCardAPI.Data.Services
{
    public class UserService
    {
        private readonly ILogger<UserService> _logger;
        private readonly UserRepository _userRepository;

        public UserService(ILogger<UserService> logger, UserRepository userRepository)
        {
            _logger = logger;
            _userRepository = userRepository;
        }

        public async Task<User> LoginUser(string steamId)
        {
            _logger.LogInformation($"User {steamId} just logged in");
            return await _userRepository.GetOrCreateUser(steamId);
        }

        public async Task SaveCardGroup(string steamId, string groupKey, string groupData)
        {
            User user = await _userRepository.GetUser(steamId);

            EncodedCardGroup group = user.EncodedCardGroups.FirstOrDefault(group => group.GroupKey == groupKey) ?? new EncodedCardGroup()
            {
                GroupKey = groupKey
            };
            group.EncodedString = groupData;
            user.EncodedCardGroups = user.EncodedCardGroups.Where(group2 => group.Id != group2.Id).Append(group).ToList();
            _logger.LogInformation($"{user.SteamId} just stored a card group");
            await _userRepository.UpdateUser(user);
        }

        public async Task SavePetData(string steamId, string petModel, string petEffect)
        {
            User user = await _userRepository.GetUser(steamId);
            user.PetModel = petModel;
            user.PetEffect = petEffect;
            _logger.LogInformation($"User {user.SteamId} saved new pet data with model: {petModel} and effect {petEffect}");
        }
    }
}