Query/AppConv/General/DecimalUnitConverterSimple.cs

using System;

namespace AppConv.General;

abstract class DecimalUnitConverterSimple<T> : DecimalUnitConverterBase<T> where T : struct {
	// ReSharper disable once StaticMemberInGenericType
	private static readonly Func<decimal, decimal> FuncNoChange = static val => val;

	private readonly DecimalFuncMap MapFrom = new ();
	private readonly DecimalFuncMap MapTo = new ();

	private int invalidUnitObject = -1;

	protected sealed override NameMap Names { get ; } = new ();

	protected sealed override DecimalFuncMap ConvertFrom => MapFrom;

	protected sealed override DecimalFuncMap ConvertTo => MapTo;

	protected override int Precision => 3;

	protected override bool CaseCheck => true;

	protected void AddUnit(T unitObject, params string[] names) {
		foreach (string name in names) {
			Names.Add(name, unitObject);
		}

		ConvertFrom.Add(unitObject, FuncNoChange);
		ConvertTo.Add(unitObject, FuncNoChange);
	}

	protected void SetUnitFactor(T unitObject, decimal factor) {
		ConvertFrom[unitObject] = val => val * factor;
		ConvertTo[unitObject] = val => val / factor;
	}

	protected void SetInvalidUnitObject(T unitObject) {
		invalidUnitObject = (int) (object) unitObject;
	}

	protected sealed override bool IsValueInvalid(T value) {
		return (int) (object) value == invalidUnitObject;
	}
}