jslingua/src/eng/eng.lang.mjs

Language processing modules

import Lang from "../lang.mjs";

class EngLang extends Lang {
  static CS = {};
  static TR = {};
  static langCode = "eng";

  /*
  * Write the English number into Arabic letters
  * @override
  */
  static nbr2words(num){
    return __toEnglishLetters2(num, true);
  }
}

EngLang._nChs("BasicLatin", 0x0000, 0x007F);

EngLang._nTrans("min2maj", "Miniscule to Majuscule", [{offset:-0x0020, begin:0x0061, end:0x007A}]);
EngLang._nTrans("maj2min", "Majuscule to Miniscule", [{offset:0x0020, begin:0x0041, end:0x005A}]);

//==========================================
// CONSTANTS
//==========================================

//https://en.wikipedia.org/wiki/List_of_numbers
const lookup = {
  0: "zero", 1: "one", 2: "two", 3:"three", 4: "four",
  5: "five", 6: "six", 7: "seven", 8: "eight", 9: "nine",

  10: "ten", 11: "eleven", 12: "twelve", 13: "thirteen",
  14: "fourteen", 15: "fifteen",

  20: "twenty", 30: "thirty", 40: "forty", 50: "fifty",

  100: "hundred",
  1000: "thousand",
  1000000: "million",
  1000000000: "billion"
},
bigNbr = [
  100, 1000, 1000000, 1000000000
  //1000000000, 1000000, 1000, 100, 10
];


/**
* Transform from Arabic numbers to English letters
*
* @method __toEnglishLetters2
* @private
* @memberof EngLang
* @param {Number} nbr the integer number
* @param {Boolean} comma put a comma or not
* @return {String} English writing of numbers
*/
function __toEnglishLetters2(num, comma) {

  if (isNaN(num)) return "";

  if(num < 0) return "minus " + __toEnglishLetters2(-num, true);

  if (num < 10) return lookup[num];

  if (num < 100 ){
    let div = ~~(num/10),
    rem = ~~(num % 10);

    if (div == 1){
      if (rem < 6) return lookup[num];
      return lookup[rem] + "teen";
    }

    let tenth = "";

    if (div == 8) tenth = "eighty";
    else if (div < 6) tenth = lookup[div * 10];
    else tenth = lookup[div] + "ty";

    if (rem == 0) return tenth;

    return tenth + "-" + lookup[rem];

  }


  let bigIdx = bigNbr.length -1;
  while (bigIdx >= 0 && num < bigNbr[bigIdx]) bigIdx--;

  let div = ~~(num/bigNbr[bigIdx]),
  rem = ~~(num % bigNbr[bigIdx]);

  let pronounce = __toEnglishLetters2(div, false) + " " + lookup[bigNbr[bigIdx]];

  //if (div > 1) pronounce += "s"; //plural

  if (rem > 0){
    if (comma) pronounce += ", " + __toEnglishLetters2(rem, comma);
    else pronounce += " " + __toEnglishLetters2(rem, comma);
  }

  return pronounce;

}

export default EngLang;