public void Update(TariffDTO item)
{
var oldTariff = _context.TariffEntities.FirstOrDefault(x => x.Id == item.Id);
if (oldTariff != null)
{
TariffEntity tariff = _mapper.Map <TariffEntity>(item);
_context.Entry(oldTariff).CurrentValues.SetValues(tariff);
}
else
{
throw new InvalidOperationException();
}
}
/// <summary>
/// Recursive calculation. Note that this calculation assumes that lower pricing modells
/// always just have a baseCost with no consumptionCosts associated.
/// </summary>
/// <param name="tariffEntity"></param>
/// <param name="consumptionKWh"></param>
/// <returns></returns>
private decimal calculateAnnualCosts(TariffEntity tariffEntity, decimal consumptionKWh)
{
if (tariffEntity == null)
{
// no further pricing tier
return(0);
}
if (tariffEntity.KWhLimit < consumptionKWh)
{
// also add current pricing tier costs as next pricing tier calculates from then on (see model 2).
return(tariffEntity.BaseCostsAnnual + calculateAnnualCosts(tariffEntity.NextPricingTier, consumptionKWh - tariffEntity.KWhLimit.Value));
}
return(tariffEntity.BaseCostsAnnual + tariffEntity.ConsumptionCostsPerKWh * consumptionKWh);
}
/// <summary>
/// Fetches a specific tariff with corresponding meta-data (e.g. pricing tier, initial tariff, ...)
/// </summary>
/// <param name="id">Product ID to search for</param>
public async Task <TariffDTO> Get(Guid id)
{
using (_dbContext)
{
TariffEntity tariff = await _dbContext.Tariffs.FindAsync(id);
if (tariff != null)
{
// Load additional data (used this way to have the benefits of Find() by still including external data)
await _dbContext.Entry(tariff).Reference(t => t.NextPricingTier).LoadAsync();
return(tariff.Adapt <TariffDTO>());
}
return(null);
}
}
