jku-iis-project-mawen/src/helpers.js

 export const addNumbersToGrid = (numbersArr, sign) => {
  const nrGrid = []
  for (let noIdx in numbersArr){
    let nr = numbersArr[noIdx].join("").replace(/ /g, " ");
    if (parseInt(noIdx) === numbersArr.length-1){
      nr = sign + " " + nr;
    }
    nrGrid.push({id: parseInt(noIdx)+3, number: nr});
  }
  return nrGrid;
}


const afterCommaLen = (number) => {
  let noStrList = number.toString().split(".");
  if (noStrList.length > 1){
    return noStrList[1].length
  }
  return 0
}


export function numbersToArrOfArr(numbers) {
  let befComma = Math.max(...numbers).toString().split(".")[0].length;
  let afterComma = Math.max(...numbers.map(x => afterCommaLen(x)));
  let withComma = Math.max(...numbers.map(x => x.toString().indexOf(".")));

  let arrLength;
  if(withComma < 0){ // no comma found
    arrLength = befComma;
  }else{
    arrLength = befComma + afterComma + 1; // add comma and after comma len
  }

  let numbersArr = numbers.map(x => x.toString().split(""));
  for (let numArr of numbersArr){
    let commaIdx = numArr.indexOf(".");

    // without comma, add before
    while(commaIdx===-1 && numArr.length < befComma){
      numArr.unshift("&nbsp;"); // add " " before comma
    }
    // without comma, add after
    while(commaIdx===-1 && numArr.length < arrLength){
      numArr.push("&nbsp;"); // add " " after comma
    }
    // with comma, add before
    while(commaIdx>-1 && commaIdx!==befComma){
      numArr.unshift("&nbsp;"); // add " " before comma
      commaIdx = numArr.indexOf(".");
    }
    // with comma, add after
    while(numArr.length < arrLength){
      numArr.push("&nbsp;"); // add " " after comma
    }
    numArr.unshift("&nbsp;"); // for carry
  }
  return [numbersArr, befComma+1];
  // TODO: assert all have same length and comma at same index?
}