/// <summary>
/// Return 0 if the reward cannot be assigned to this user due to whathever he cannot
/// receive or loose more points in this category
/// </summary>
/// <param name="rewardCategory"></param>
/// <param name="rewardAcomulate"></param>
/// <param name="isPlus">Receive or Loose points</param>
/// <returns>allowed points</returns>
private async Task <int> AllowedPointsAsync(RewardCategory rewardCategory, RewardAcumulate rewardAcomulate, bool isPlus)
{
var currentAcumulate = rewardAcomulate.Points;
var points = 0;
if (isPlus)
{
if (rewardCategory.MaxPointsAllowed != -1)
{
var newAcumulate = currentAcumulate + rewardCategory.PointsToIncrement;
if (newAcumulate > rewardCategory.MaxPointsAllowed)
{
points = rewardCategory.MaxPointsAllowed - currentAcumulate;
}
else
{
points = rewardCategory.PointsToIncrement;
}
}
else
{
points = rewardCategory.PointsToIncrement;
}
}
else
{
if (currentAcumulate == 0)
{
points = 0;
}
else
{
var diff = currentAcumulate - rewardCategory.PointsToDecrement;
if (diff < 0)
{
points = currentAcumulate;
}
else
{
points = rewardCategory.PointsToDecrement;
}
}
}
// Know if the total allow this reward, should only be not allowed if total gets under 0
if (points == 0)
{
return(0);
}
var allowedPoints = await _userStatisticsService.AllowedPointsAsync(rewardAcomulate.UserId, isPlus?points : points * -1);
return(allowedPoints);
}
/// <summary>
/// Init acumulate if the user have no one for this category
/// </summary>
/// <param name="user"></param>
/// <param name="rewardCategory"></param>
/// <returns></returns>
private async Task <RewardAcumulate> GetOrCreateRewardAcomulate(User user, RewardCategory rewardCategory)
{
var acumulate = await _uow.RewardAcumulateRepository.GetAll()
.Where(d => d.UserId == user.Id && d.RewardCategoryId == rewardCategory.Id)
.FirstOrDefaultAsync();
if (acumulate == null)
{
acumulate = new RewardAcumulate
{
RewardCategory = rewardCategory,
User = user,
Points = 0,
CreatedAt = DateTime.UtcNow,
ModifiedAt = DateTime.UtcNow
};
await _uow.RewardAcumulateRepository.AddAsync(acumulate);
}
return(acumulate);
}