BooksAPI.js

const api = "https://reactnd-books-api.udacity.com";

// Generate a unique token for storing your bookshelf data on the backend server.
let token = localStorage.token;
if (!token)
  token = localStorage.token = Math.random()
    .toString(36)
    .substr(-8);

console.log(token);

const headers = {
  Accept: "application/json",
  Authorization: token
};

export const get = bookId =>
  fetch(`${api}/books/${bookId}`, { headers })
    .then(res => res.json())
    .then(data => data.book);

export const getAll = () =>
  fetch(`${api}/books`, { headers })
    .then(res => res.json())
    .then(data => data.books);

export const update = (book, shelf) =>
  fetch(`${api}/books/${book.id}`, {
    method: "PUT",
    headers: {
      ...headers,
      "Content-Type": "application/json"
    },
    body: JSON.stringify({ shelf })
  }).then(res => res.json());

export const search = query =>
  fetch(`${api}/search`, {
    method: "POST",
    headers: {
      ...headers,
      "Content-Type": "application/json"
    },
    body: '{ "query":"' + query + '"}'
  })
    .then(res => res.json())
    .then(data => data.books);