Function getPreferredQuote

src/utilities/get-preferred-quote.js:31–53

* @param {string} text * @param {Quote | boolean} preferredQuoteOrPreferSingleQuote * @returns {Quote}

(text, preferredQuoteOrPreferSingleQuote)

 * @returns {Quote}
 */
function getPreferredQuote(text, preferredQuoteOrPreferSingleQuote) {
  const { preferred, alternate } =
    preferredQuoteOrPreferSingleQuote === true ||
    preferredQuoteOrPreferSingleQuote === SINGLE_QUOTE
      ? SINGLE_QUOTE_SETTINGS
      : DOUBLE_QUOTE_SETTINGS;
  const { length } = text;
  let preferredQuoteCount = 0;
  let alternateQuoteCount = 0;

  // `for..of` loop is known slower
  for (let index = 0; index < length; index++) {
    const codePoint = text.charCodeAt(index);
    if (codePoint === preferred.codePoint) {
      preferredQuoteCount++;
    } else if (codePoint === alternate.codePoint) {
      alternateQuoteCount++;
    }
  }

  return (preferredQuoteCount > alternateQuoteCount ? alternate : preferred)
    .character;
}

export { DOUBLE_QUOTE, getPreferredQuote, SINGLE_QUOTE };