public static Amount GetWeightForUsage(IngredientUsage usage)
{
if (Unit.GetConvType(usage.Form.FormUnitType) == UnitType.Weight) //Already there, just convert to grams
{
return(UnitConverter.Convert(usage.Amount, Units.Gram));
}
if (usage.Ingredient.ConversionType == UnitType.Weight) //Ingredient is sold in weight, so we can use its native amount
{
var amt = GetNativeAmountForUsage(usage.Ingredient, usage);
return(UnitConverter.Convert(amt, Units.Gram));
}
if (usage.Ingredient.ConversionType == UnitType.Unit && usage.Ingredient.UnitWeight > 0) //Ingredient sold in units, but we know weight of each
{
var amt = GetNativeAmountForUsage(usage.Ingredient, usage);
amt.Unit = Units.Gram;
amt *= usage.Ingredient.UnitWeight;
return(amt);
}
if (Unit.GetConvType(usage.Form.FormAmount.Unit) == UnitType.Weight && usage.Form.FormAmount.SizeHigh > 0) //This form has a gram weight
{
var amt = UnitConverter.Convert(usage.Amount, usage.Form.FormUnitType);
return(new Amount(amt.SizeHigh * usage.Form.FormAmount.SizeHigh, Units.Gram));
}
return(null);
}
public static Amount operator +(Amount a1, Amount a2)
{
if (a1.Unit == a2.Unit) //Just add
{
if (a1.SizeLow.HasValue && a2.SizeLow.HasValue) //Combine the lows, combine the highs
{
return(new Amount(a1.SizeLow + a2.SizeLow, a1.SizeHigh + a2.SizeHigh, a1.Unit));
}
if (a1.SizeLow.HasValue) //(1-2) + 1 = (2-3)
{
return(new Amount(a1.SizeLow + a2.SizeHigh, a1.SizeHigh + a2.SizeHigh, a1.Unit));
}
if (a2.SizeLow.HasValue) //1 + (1-2) = (2-3)
{
return(new Amount(a1.SizeHigh + a2.SizeLow, a1.SizeHigh + a2.SizeHigh, a1.Unit));
}
//just combine the highs
return(new Amount(a1.SizeHigh + a2.SizeHigh, a1.Unit));
}
if (UnitConverter.CanConvert(a1.Unit, a2.Unit))
{
//TODO: Handle range + nonrange
var newLow = a2.SizeLow.HasValue ? (float?)UnitConverter.Convert(a2.SizeLow.Value, a2.Unit, a1.Unit) : null;
var newHigh = a1.SizeHigh + UnitConverter.Convert(a2.SizeHigh, a2.Unit, a1.Unit);
return(new Amount(newLow, newHigh, a1.Unit));
}
throw new IncompatibleAmountException();
}
public static Amount operator +(Amount firstAmount, Amount secondAmount)
{
if (firstAmount.Unit == secondAmount.Unit) //Just add
{
if (firstAmount.SizeLow.HasValue && secondAmount.SizeLow.HasValue) //Combine the lows, combine the highs
{
return(new Amount(firstAmount.SizeLow + secondAmount.SizeLow, firstAmount.SizeHigh + secondAmount.SizeHigh, firstAmount.Unit));
}
if (firstAmount.SizeLow.HasValue) //(1-2) + 1 = (2-3)
{
return(new Amount(firstAmount.SizeLow + secondAmount.SizeHigh, firstAmount.SizeHigh + secondAmount.SizeHigh, firstAmount.Unit));
}
if (secondAmount.SizeLow.HasValue) //1 + (1-2) = (2-3)
{
return(new Amount(firstAmount.SizeHigh + secondAmount.SizeLow, firstAmount.SizeHigh + secondAmount.SizeHigh, firstAmount.Unit));
}
//just combine the highs
return(new Amount(firstAmount.SizeHigh + secondAmount.SizeHigh, firstAmount.Unit));
}
if (UnitConverter.CanConvert(firstAmount.Unit, secondAmount.Unit))
{
//TODO: Handle range + nonrange
var newLow = secondAmount.SizeLow.HasValue
? (float?)UnitConverter.Convert(secondAmount.SizeLow.Value, secondAmount.Unit, firstAmount.Unit)
: null;
var newHigh = firstAmount.SizeHigh + UnitConverter.Convert(secondAmount.SizeHigh, secondAmount.Unit, firstAmount.Unit);
return(new Amount(newLow, newHigh, firstAmount.Unit));
}
throw new IncompatibleAmountException();
}
public static Amount GetNativeAmountForUsage(Ingredient ingredient, IngredientUsage usage)
{
var amount = new Amount();
var usageConvType = Unit.GetConvType(usage.Form.FormUnitType);
switch (ingredient.ConversionType) //This is the type we must convert to
{
case UnitType.Unit:
amount.Unit = Units.Unit;
if (usageConvType == UnitType.Unit) //Unit to unit version
{
var equivGrams = UnitConverter.Convert(usage.Form.FormAmount, Units.Gram); //Grams this form is equivelent to
amount.SizeHigh = (float)Math.Ceiling((equivGrams.SizeHigh * usage.Amount.SizeHigh) / ingredient.UnitWeight);
return(amount);
}
if (usageConvType == UnitType.Weight) //Weight to unit conversion
{
var grams = UnitConverter.Convert(usage.Amount, Units.Gram);
amount.SizeHigh = (float)Math.Ceiling(grams.SizeHigh / ingredient.UnitWeight);
return(amount);
}
if (usageConvType == UnitType.Volume) //Volume to unit conversion
{
var likeAmount = UnitConverter.Convert(usage.Amount, usage.Form.FormUnitType);
amount.SizeHigh = (float)Math.Ceiling((likeAmount.SizeHigh * usage.Form.FormAmount.SizeHigh) / usage.Ingredient.UnitWeight); //Round up when dealing with whole units
return(amount);
}
break;
case UnitType.Weight:
amount.Unit = Units.Gram;
if (usageConvType == UnitType.Unit) //Unit to weight conversion
{
amount.SizeHigh = usage.Amount.SizeHigh * usage.Form.FormAmount.SizeHigh; //NOTE: FormAmount will always be in Grams when Ingredient ConvType is weight
return(amount);
}
if (usageConvType == UnitType.Volume) //Volume to weight conversion
{
var likeAmount = UnitConverter.Convert(usage.Amount, usage.Form.FormUnitType);
amount.SizeHigh = likeAmount.SizeHigh * usage.Form.FormAmount.SizeHigh; //NOTE: FormAmount will always be in Grams when Ingredient ConvType is weight
return(amount);
}
break;
case UnitType.Volume:
amount.Unit = Units.Teaspoon;
if (usageConvType == UnitType.Unit) //Unit to volume conversion
{
amount.SizeHigh = usage.Amount.SizeHigh * usage.Form.FormAmount.SizeHigh; //NOTE: FormAmount will always be in tsp when Ingredient ConvType is volume
return(amount);
}
if (usageConvType == UnitType.Weight) //Weight to volume conversion
{
var likeAmount = UnitConverter.Convert(usage.Amount, usage.Form.FormUnitType);
amount.SizeHigh = likeAmount.SizeHigh * usage.Form.FormAmount.SizeHigh; //NOTE: FormAmount will always be in teaspoons when Ingredient ConvType is Volume
return(amount);
}
break;
}
//throw new IngredientAggregationDatabaseException("Cannot convert an IngredientUsage into its native form.", ingredient, usage);
throw new Exception("Cannot convert an IngredientUsage into its native form.");
}