// Set of functions to handle articles

function getArticleYear(article) {
  if (article.metaData.pubDate.getFullYear) {
    return article.metaData.pubDate.getFullYear();
  }

  if (article.metaData.pubDate.getUTCFullYear) {
    return article.metaData.pubDate.getUTCFullYear();
  }

  return 0;
}

function getArticleDate(article) {
  if (article.metaData.pubDate.getDate) {
    return article.metaData.pubDate.getFullYear() * 100 + article.metaData.pubDate.getDate();
  }

  if (article.metaData.pubDate.getUTCDate) {
    return article.metaData.pubDate.getUTCFullYear() * 100 + article.metaData.pubDate.getDate();
  }

  return 0;
}

function cmpArticles(a, b) {
  return getArticleDate(b) - getArticleDate(a);
}

export {getArticleDate, getArticleYear, cmpArticles};