sebastienros.jint/Jint.Tests/Runtime/Domain/Dimensional.cs

namespace Jint.Tests.Runtime.Domain;

public class Dimensional : IComparable<Dimensional>, IEquatable<Dimensional>
{
    private readonly MeasureUnit[] PossibleMeasureUnits = new MeasureUnit[] { new MeasureUnit("Mass", "kg", 1.0), new MeasureUnit("Mass", "gr", 0.001), new MeasureUnit("Count", "piece", 1.0) };

    public MeasureUnit MeasureUnit { get; private set; }

    public double Value { get; private set; }

    public double NormalizatedValue
    {
        get
        {
            return Value * MeasureUnit.RelativeValue;
        }
    }

    public Dimensional(string measureUnit, double value)
    {
        MeasureUnit = GetMeasureUnitByName(measureUnit);
        Value = value;
    }

    public static Dimensional operator +(Dimensional left, Dimensional right)
    {
        if (left.MeasureUnit.MeasureType != right.MeasureUnit.MeasureType)
            throw new InvalidOperationException("Dimensionals with different measure types are non-summable");

        return new Dimensional(left.MeasureUnit.RelativeValue <= right.MeasureUnit.RelativeValue ? left.MeasureUnit.Name : right.MeasureUnit.Name,
            left.Value * left.MeasureUnit.RelativeValue + right.Value * right.MeasureUnit.RelativeValue);
    }

    private MeasureUnit GetMeasureUnitByName(string name)
    {
        return PossibleMeasureUnits.FirstOrDefault(mu => mu.Name == name);
    }

    public int CompareTo(Dimensional obj)
    {
        if (MeasureUnit.MeasureType != obj.MeasureUnit.MeasureType)
            throw new InvalidOperationException("Dimensionals with different measure types are non-comparable");
        return NormalizatedValue.CompareTo(obj.NormalizatedValue);
    }

    public override string ToString()
    {
        return Value + " " + MeasureUnit.Name;
    }

    public bool Equals(Dimensional other)
    {
        if (ReferenceEquals(null, other))
        {
            return false;
        }

        if (ReferenceEquals(this, other))
        {
            return true;
        }

        return Value.Equals(other.Value) && Equals(MeasureUnit, other.MeasureUnit);
    }

    public override bool Equals(object obj)
    {
        return Equals(obj as Dimensional);
    }

    public override int GetHashCode()
    {
        return Value.GetHashCode();
    }
}

public class MeasureUnit : IEquatable<MeasureUnit>
{
    public string MeasureType { get; set; }
    public string Name { get; set; }
    public double RelativeValue { get; set; }

    public MeasureUnit(string measureType, string name, double relativeValue)
    {
        this.MeasureType = measureType;
        this.Name = name;
        this.RelativeValue = relativeValue;
    }

    public bool Equals(MeasureUnit other)
    {
        if (ReferenceEquals(null, other))
        {
            return false;
        }

        if (ReferenceEquals(this, other))
        {
            return true;
        }

        return MeasureType == other.MeasureType && Name == other.Name && RelativeValue.Equals(other.RelativeValue);
    }

    public override bool Equals(object obj)
    {
        return Equals(obj as MeasureUnit);
    }

    public override int GetHashCode()
    {
        return MeasureType.GetHashCode() ^ Name.GetHashCode() ^ RelativeValue.GetHashCode();
    }
}