Number2Word.cs

// Number to Word converter for Central Kurdish
// Copyright (C) 2019 Aso Mahmudi
// Developer and Maintainer: Aso Mahmudi (aso.mehmudi@gmail.com)
// Source Code: https://github.com/AsoSoft/AsoSoft-Library

using System;
using System.Text.RegularExpressions;

namespace AsoSoftLibrary
{
    public static partial class AsoSoft
    {
	   /// <summary>converts numerals into Central Kurdish words. It is useful in text-to-speech tools.</summary>
	   public static string Number2Word(string text)
	   {
		  // convert numbers to latin
		  var unifyNumbers = new string[]{
			 "٠|۰", "0",
			 "١|۱", "1",
			 "٢|۲", "2",
			 "٣|۳", "3",
			 "٤|۴", "4",
			 "٥|۵", "5",
			 "٦|۶", "6",
			 "٧|۷", "7",
			 "٨|۸", "8",
			 "٩|۹", "9" };
		  for (int i = 0; i < unifyNumbers.Length; i += 2)
			 text = Regex.Replace(text, unifyNumbers[i], unifyNumbers[i + 1]);

		  text = Regex.Replace(text, "([0-9]{1,3})[,،](?=[0-9]{3})", "$1");  // remove thousend seperator  12,345,678 => 12345678
		  text = Regex.Replace(text, "(?<![0-9])-([0-9]+)", "ناقس $1");  // negative
		  text = Regex.Replace(text, "(?<![0-9])% ?([0-9]+)", "لە سەددا $1");    // percent sign before
		  text = Regex.Replace(text, "([0-9]+) ?%", "$1 لە سەد");    // percent sign after
		  text = Regex.Replace(text, "\\$ ?([0-9]+(\\.[0-9]+)?)", "$1 دۆلار");    // $ querency 
		  text = Regex.Replace(text, "£ ?([0-9]+(\\.[0-9]+)?)", "$1 پاوەن");  // £ querency 
		  text = Regex.Replace(text, "€ ?([0-9]+(\\.[0-9]+)?)", "$1 یۆرۆ");   // € querency 

		  // convert float numbers
		  text = Regex.Replace(text, "([0-9]+)\\.([0-9]+)",
			 m => floatName(m.Groups[1].Value.ToString(), m.Groups[2].Value.ToString()));

		  //convert remaining integr numbers
		  text = Regex.Replace(text, "([0-9]+)",
			 m => integerName(m.Groups[1].Value.ToString()));

		  return text;
	   }

	   private static string floatName(string integerPart, string decimalPart)
	   {
		  var point = " پۆینت " + Regex.Replace(decimalPart, "(?<=^|0)0", " سفر ");
		  point = Regex.Replace(point, "[0-9]", "");
		  return integerName(integerPart) + point + integerName(decimalPart);
	   }

	   private static string integerName(string inputInteger)
	   {
		  var output = "";
		  if (inputInteger != "0")
		  {
			 string[] ones = { "", "یەک", "دوو", "سێ", "چوار", "پێنج", "شەش", "حەوت", "هەشت", "نۆ" };
			 string[] teens = { "دە", "یازدە", "دوازدە", "سێزدە", "چواردە", "پازدە", "شازدە", "حەڤدە", "هەژدە", "نۆزدە" };
			 string[] tens = { "", "", "بیست", "سی", "چل", "پەنجا", "شەست", "هەفتا", "هەشتا", "نەوەد" };
			 string[] hundreds = { "", "سەد", "دووسەد", "سێسەد", "چوارسەد", "پێنسەد", "شەشسەد", "حەوتسەد", "هەشتسەد", "نۆسەد" };
			 string[] thousands = { "", " هەزار", " ملیۆن", " ملیار", " بلیۆن", " بلیار", " تریلیۆن", " تریلیار", " کوادرلیۆن" };
			 var temp = inputInteger;
			 for (int i = 0; i < inputInteger.Length; i = i + 3)
			 {
				string currentThree = Regex.Match(temp, "([0-9]{1,3})$").Result("$1");
				temp = temp.Substring(0, temp.Length - currentThree.Length);
				currentThree = currentThree.PadLeft(3, '0');
				var C = Int32.Parse(currentThree[0].ToString());
				var X = Int32.Parse(currentThree[1].ToString());
				var I = Int32.Parse(currentThree[2].ToString());
				var conjunction1 = ((C != 0) && (X != 0 || I != 0)) ? " و " : "";
				var conjunction2 = (X != 0 && I != 0) ? " و " : "";
				if (X == 1)
				    currentThree = hundreds[C] + conjunction1 + teens[I];
				else
				    currentThree = hundreds[C] + conjunction1 + tens[X] + conjunction2 + ones[I];
				var M = (currentThree == "") ? "" : thousands[(int)(Math.Floor(i / 3.0))];
				currentThree += M;
				var conjunction3 = (output == "") ? "" : " و ";
				if (currentThree != "")
				    output = currentThree + conjunction3 + output;
			 }
			 output = output.Replace("یەک هەزار", "هەزار");
		  }
		  else // if input number = 0
			 output = "سفر";
		  return output;
	   }
    }
}