/** © Andy Bell - https://buildexcellentwebsit.es/ */

module.exports = {
  /**
   * Returns back some attributes based on wether the
   * link is active or a parent of an active item
   *
   * @param {String} itemUrl The link in question
   * @param {String} pageUrl The page context
   * @returns {String} The attributes or empty
   */
  getLinkActiveState(itemUrl, pageUrl) {
    let response = '';

    if (itemUrl === pageUrl) {
      response = ' aria-current="page"';
    }

    if (itemUrl.length > 1 && pageUrl.indexOf(itemUrl.replace('/page-0/', '')) === 0) {
      response += 'data-state="active"';
    }

    return response;
  },
  /**
   * Take an array of keys and return back items that match.
   * Note: items in the collection must have a key attribute in
   * Front Matter
   *
   * @param {Array} collection 11ty collection
   * @param {Array} keys collection of keys
   * @returns {Array} result collection or empty
   */
  filterCollectionByKeys(collection, keys) {
    return collection.filter(x => keys.includes(x.data.key));
  },

  random() {
    const segment = () => {
      return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
    };
    return `${segment()}-${segment()}-${segment()}`;
  }
};