// Throw if a given unit does exist
private void ValidateNewSynonym(UnitFactorSynonyms synonyms)
{
var preExistingUnit = Units.FindUnit(synonyms);
if (preExistingUnit != null)
{
throw new UnitAlreadyExistsException(preExistingUnit.ToString());
}
}
// Find if some synonym of a given UnitFactor is included in this UnitFactor
internal bool Contains(UnitFactorSynonyms synonyms)
{
foreach (var syn in synonyms.Synonyms)
{
if (this.Contains(syn))
{
return(true);
}
}
return(false);
}
//Reference: https://www.thoughtco.com/temperature-conversion-formulas-609324
public static double AToB(IBaseUnitConverter unitConverter, double value, string startUnit, string endUnit)
{
UnitFactorSynonyms startUnitSyn = unitConverter.SupportedUnits.SingleOrDefault(r => r.Contains(startUnit));
UnitFactorSynonyms endUnitSyn = unitConverter.SupportedUnits.SingleOrDefault(r => r.Contains(endUnit));
if (startUnitSyn is default(UnitFactorSynonyms) || endUnitSyn is default(UnitFactorSynonyms))
{
return(value);
}
if (startUnitSyn.Contains(CELSIUS_KEY) && endUnitSyn.Contains(FAHRENHEIT_KEY))
{
//Celsius to Fahrenheit : °F = 9/5 (°C) + 32
return(((9d / 5) * value) + 32);
}
else if (startUnitSyn.Contains(KELVIN_KEY) && endUnitSyn.Contains(FAHRENHEIT_KEY))
{
//Kelvin to Fahrenheit: °F = 9 / 5(K - 273.15) + 32
return((9d / 5) * (value - 273.15) + 32);
}
else if (startUnitSyn.Contains(FAHRENHEIT_KEY) && endUnitSyn.Contains(CELSIUS_KEY))
{
//Fahrenheit to Celsius: °C = 5/9 (°F - 32)
return((5d / 9) * (value - 32));
}
else if (startUnitSyn.Contains(CELSIUS_KEY) && endUnitSyn.Contains(KELVIN_KEY))
{
//Celsius to Kelvin: K = °C + 273.15
return(value + 273.15);
}
else if (startUnitSyn.Contains(KELVIN_KEY) && endUnitSyn.Contains(CELSIUS_KEY))
{
//Kelvin to Celsius: °C = K - 273.15
return(value - 273.15);
}
else if (startUnitSyn.Contains(FAHRENHEIT_KEY) && endUnitSyn.Contains(KELVIN_KEY))
{
//Fahrenheit to Kelvin: K = 5 / 9(°F - 32) + 273.15
return((5d / 9) * (value - 32) + 273.15);
}
//Used "else" for corner case "both units are same"
else
{
return(value);
}
}
/// <summary>
/// Add a new unit with a new set of synonyms
/// </summary>
/// <param name="synonyms">Object of synonyms</param>
/// <param name="factor"></param>
public void AddUnit(UnitFactorSynonyms synonyms, double factor)
{
ValidateNewSynonym(synonyms);
Units.Add(synonyms, factor);
}