CodeLiturgy.Dashboard/BlueWest.Data.Capital/Transaction/MathOperation.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using SimpleExpressionEvaluator;

namespace BlueWest.Data;

public class MathOperation
{
    [Key] public TimeSpan CreationDate { get; set; }

    private bool _isCalculated = false;

    private string _expression;

    private decimal _resultingAmount;

    private ExpressionEvaluator _expressionEvaluator = new ExpressionEvaluator();

    public decimal ResultingAmount
    {
        get
        {
            if (_isCalculated) return _resultingAmount;
            return 0;
        }
    }

    public MathOperation() { }
    public MathOperation(string expression, Dictionary<string, decimal> letters)
    {
        
        _resultingAmount = _expressionEvaluator.Evaluate(expression, letters);
        _isCalculated = true;
        
    }

}