UnitsNet/UnitsNet.Tests/CustomQuantities/HowMuch.cs at f7cc6d38725cf0e864d6c059c0b6ce8bd95a2e3c · angularsen/UnitsNet · GitHub

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namespace UnitsNet.Tests.CustomQuantities
{
    /// <inheritdoc cref="IQuantity"/>
    /// <summary>
    /// Example of a custom/third-party quantity implementation, for plugging in quantities and units at runtime.
    /// </summary>
    public readonly struct HowMuch : IQuantity<HowMuch, HowMuchUnit>
    {
        public HowMuch(double value, HowMuchUnit unit)
        {
            Unit = unit;
            Value = value;
        }

        public static HowMuch From(double value, HowMuchUnit unit)
        {
            return new HowMuch(value, unit);
        }

        public double As(HowMuchUnit unit)
        {
            throw new NotImplementedException();
        }

        public HowMuchUnit Unit { get; }

        public double Value { get; }

        #region IQuantity

        public static readonly QuantityInfo<HowMuch, HowMuchUnit> Info = new(
            nameof(HowMuch),
            HowMuchUnit.Some,
            new UnitDefinition<HowMuchUnit>[]
            {
                new(HowMuchUnit.Some, "Some", BaseUnits.Undefined),
                new(HowMuchUnit.ATon, "Tons", new BaseUnits(mass: MassUnit.Tonne)),
                new(HowMuchUnit.AShitTon, "ShitTons", BaseUnits.Undefined)
            },
            new HowMuch(0, HowMuchUnit.Some),
            new BaseDimensions(0, 1, 0, 0, 0, 0, 0),
            From,
            RegisterUnitConversions);

        QuantityInfo<HowMuch, HowMuchUnit> IQuantity<HowMuch, HowMuchUnit>.QuantityInfo
        {
            get => Info;
        }

        QuantityInfo<HowMuchUnit> IQuantity<HowMuchUnit>.QuantityInfo
        {
            get => Info;
        }

        QuantityInfo IQuantity.QuantityInfo
        {
            get => Info;
        }

        public BaseDimensions Dimensions => Info.BaseDimensions;


        UnitKey IQuantity.UnitKey
        {
            get => UnitKey.ForUnit(Unit);
        }

        public double As(Enum unit) => Convert.ToDouble(unit);

        public double As(UnitSystem unitSystem) => throw new NotImplementedException();

        public IQuantity ToUnit(Enum unit)
        {
            if (unit is HowMuchUnit howMuchUnit) return new HowMuch(As(unit), howMuchUnit);
            throw new ArgumentException("Must be of type HowMuchUnit.", nameof(unit));
        }

        public IQuantity<HowMuchUnit> ToUnit(HowMuchUnit unit)
        {
            throw new NotImplementedException();
        }

        IQuantity<HowMuchUnit> IQuantity<HowMuchUnit>.ToUnit(UnitSystem unitSystem)
        {
            throw new NotImplementedException();
        }

        public IQuantity ToUnit(UnitSystem unitSystem) => throw new NotImplementedException();

        public override string ToString() => $"{Value} {Unit}";
        public string ToString(string? format, IFormatProvider? formatProvider) => $"HowMuch ({format}, {formatProvider})";
        public string ToString(IFormatProvider? provider) => $"HowMuch ({provider})";

        public bool Equals(IQuantity? other, IQuantity tolerance) => throw new NotImplementedException();

        public bool Equals(HowMuch other, HowMuch tolerance)
        {
            throw new NotImplementedException();
        }

#if !NET

        QuantityInfo IQuantity.QuantityInfo
        {
            get { return Info; }
        }

        Enum IQuantity.Unit => Unit;
#endif
        #endregion

        internal static void RegisterUnitConversions(UnitConverter unitConverter)
        {
            // Register in unit converter: HowMuchUnit -> BaseUnit
            unitConverter.SetConversionFunction<HowMuch>(HowMuchUnit.ATon, HowMuchUnit.Some, howMuch => new HowMuch(howMuch.Value * 1e3, HowMuchUnit.Some));
            unitConverter.SetConversionFunction<HowMuch>(HowMuchUnit.AShitTon, HowMuchUnit.Some, howMuch => new HowMuch(howMuch.Value * 1e6, HowMuchUnit.Some));

            // Register in unit converter: BaseUnit <-> BaseUnit
            unitConverter.SetConversionFunction<HowMuch>(HowMuchUnit.Some, HowMuchUnit.Some, howMuch => howMuch);

            // Register in unit converter: BaseUnit -> HowMuchUnit
            unitConverter.SetConversionFunction<HowMuch>(HowMuchUnit.Some, HowMuchUnit.ATon, howMuch => new HowMuch(howMuch.Value * 1e-3, HowMuchUnit.ATon));
            unitConverter.SetConversionFunction<HowMuch>(HowMuchUnit.Some, HowMuchUnit.AShitTon, howMuch => new HowMuch(howMuch.Value * 1e-6, HowMuchUnit.AShitTon));
        }
    }
}