Biskilog_Accounting/Shared/ServiceRepo/CalculatorService.cs

using Biskilog_Accounting.Shared.Interfaces;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Biskilog_Accounting.Shared.ServiceRepo
{
    public class CalculatorService : ICalculator
    {
        public double CalculatePercentage()
        {
            throw new NotImplementedException();
        }

        public string FormatMoneyWithCurrency(double a_amount)
        {
            return string.Format(GetCurrencyCode(), " {0:C2}", a_amount);
        }
        public string FormatMoneyWithCurrencyKilo(double a_amount)
        {
            return GetCurrencyCode().CurrencySymbol + FormatNumber(a_amount);
        }
        public NumberFormatInfo GetCurrencyCode()
        {
            //TODO have a better implementation

            // Specify the locale for Ghana
            string locale = "en-GH";

            // Get the NumberFormatInfo for the specified locale
            NumberFormatInfo numberFormatInfo = new CultureInfo(locale).NumberFormat;

            // Set the currency symbol to Ghanaian cedi
            numberFormatInfo.CurrencySymbol = "GH₵ ";

            return numberFormatInfo;
        }
        private string FormatNumber(double a_amount)
        {
            if (a_amount >= 100000000)
            {
                return (a_amount / 1000000D).ToString("0.#M");
            }
            if (a_amount >= 1000000)
            {
                return (a_amount / 1000000D).ToString("0.##M");
            }
            if (a_amount >= 100000)
            {
                return (a_amount / 1000D).ToString("0.#k");
            }
            if (a_amount >= 10000)
            {
                return (a_amount / 1000D).ToString("0.##k");
            }

            return a_amount.ToString("#,0");
        }
    }
}