vampireneo/Book

var Q = require('q'),
  cheerio = require('cheerio'),
  request = require('request'),
  moment = require('moment');

exports.getByISBN = function(pISBN) {
  var domain = 'http://www.eslite.com/';
  var searchUrl = 'Search_BW.aspx?query=';
  var bookObj = {};
  var deferred = Q.defer();

  request({ url: domain + searchUrl + pISBN, tunnel: true }, function(
    error,
    response,
    body
  ) {
    if (!error) {
      var $ = cheerio.load(body);
      var link = $('#search_content td.name h3 a').eq(0);

      if (link.length > 0) {
        var targetUrl = $(link).attr('href');

        request(domain + targetUrl, function(error, response, body) {
          if (!error) {
            var $ = cheerio.load(body);
            bookObj.source = domain + targetUrl;
            bookObj.Title = $('#content h1 span')
              .eq(0)
              .text()
              .trim();
            bookObj.SubTitle = $('#content h1 span')
              .eq(1)
              .text()
              .trim();
            bookObj.ImageUrl = $('#mainlink img').attr('src');
            if (bookObj.ImageUrl === 'images/product/ProductDefaultImg.jpg') {
              delete bookObj.ImageUrl;
            }
            var infos = $('#content .PI_info h3, #content .PI_info h2');
            infos.each(function(i, info) {
              var text = $(info).text();
              if (text.indexOf('作者') !== -1) {
                bookObj.Author = $('a', info)
                  .eq(0)
                  .text()
                  .trim();
              } else if (text.indexOf('譯者') !== -1) {
                bookObj.Translater = $('a', info)
                  .eq(0)
                  .text()
                  .trim();
              } else if (text.indexOf('出版社') !== -1) {
                bookObj.Publisher = $('a', info)
                  .eq(0)
                  .text()
                  .trim();
              } else if (text.indexOf('出版日期') !== -1) {
                bookObj.PublishDate = moment(
                  text.split('／')[1].trim(),
                  'YYYY/MM/DD'
                ).toDate();
              } else if (text.indexOf('商品語言') !== -1) {
                bookObj.Language = text
                  .split('／')[1]
                  .trim()
                  .replace('中文/繁體', '繁體中文');
              } else if (text.indexOf('裝訂') !== -1) {
                bookObj.Spec = text.split('／')[1].trim();
              }
            });
            infos = $('#content .C_box p')
              .text()
              .split('\n');
            for (var i = 0; i < infos.length; i++) {
              if (infos[i].indexOf('ISBN 13') > -1) {
                bookObj.ISBN = infos[i].split('／')[1].trim();
              }
            }
            infos = $("#content .C_box table[id*='dlSpec'] td");
            infos.each(function(i, info) {
              var text = $('span', info)
                .eq(0)
                .text();
              if (text.indexOf('頁數') !== -1) {
                bookObj.Pages = $('span', info)
                  .eq(1)
                  .text()
                  .trim();
              }
            });
            deferred.resolve(bookObj);
          } else {
            deferred.resolve(bookObj);
          }
        });
      } else {
        deferred.resolve(bookObj);
      }
    } else {
      deferred.resolve(bookObj);
    }
  });
  return deferred.promise;
};