helper.js

const capitalizeFirstLetter = (inputString) => {
  if (typeof inputString == 'string') {
    return inputString.charAt(0).toUpperCase() + inputString.slice(1);
  } else {
    return inputString;
  }
};

const deCapitalizeFirstLetter = (inputString) => {
  if (typeof inputString == 'string') {
    return inputString.charAt(0).toLowerCase() + inputString.slice(1);
  } else {
    return inputString;
  }
};

const removeQuotes = (inputString) => {
  if (typeof inputString == 'string') {
    return inputString.replace(/^"(.+)"$/, '$1');
  } else {
    return inputString;
  }
};

const removeSpaces = (inputString) => inputString.replace(/ /g, '');

const checkBool = (bool) => {
  return typeof bool === 'boolean' ||
    (typeof bool === 'object' &&
      bool !== null &&
      typeof bool.value === 'boolean');
};

const getMapKeyByValue = (map, searchValue) => {
  for (let [key, value] of map.entries()) {
    if (value === searchValue) {
      return key;
    }
  }
};

const getObjKeyByValue = (obj, value) => Object.keys(obj).find(key => obj[key] === value);

const isNumeric = value => /^\d+$/.test(value);

const isEmpty = obj => Object.getOwnPropertyNames(obj).length === 0;

const getFirstOrAll = map => map.size === 1 ? map.values().next().value : Array.from(map.values());

const countOccurrences = (str, find) => (str.split(find)).length - 1;

module.exports = {
  capitalizeFirstLetter,
  deCapitalizeFirstLetter,
  removeQuotes,
  removeSpaces,
  checkBool,
  getMapKeyByValue,
  getObjKeyByValue,
  isNumeric,
  isEmpty,
  getFirstOrAll,
  countOccurrences,
};