const slugify = (string) => {
  const a = 'àáâäæãåāăąçćčđďèéêëēėęěğǵḧîïíīįìłḿñńǹňôöòóœøōõőṕŕřßśšşșťțûüùúūǘůűųẃẍÿýžźż·/_,:;';
  const b = 'aaaaaaaaaacccddeeeeeeeegghiiiiiilmnnnnoooooooooprrsssssttuuuuuuuuuwxyyzzz------';
  const p = new RegExp(a.split('').join('|'), 'g');

  return string.toString().toLowerCase()
    .replace(/\s+/g, '-') // Replace spaces with -
    .replace(p, (c) => b.charAt(a.indexOf(c))) // Replace special characters
    .replace(/&/g, '-and-') // Replace & with 'and'
    .replace(/[^\w-]+/g, '') // Remove all non-word characters
    .replace(/--+/g, '-') // Replace multiple - with single -
    .replace(/^-+/, '') // Trim - from start of text
    .replace(/-+$/, ''); // Trim - from end of text
};

export const libraryUrl = (librarySlug) => `/libraries/${librarySlug}`;

export const bookUrl = (book, librarySlug) => `${libraryUrl(librarySlug)}/book/${book.id}-${slugify(book.title)}`;

export const bookIdFromUrl = (url) => url.split('-')[0];
