vampireneo/Book

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

exports.getByISBN = function(pISBN) {
  var domain = 'http://m.kingstone.com.tw';
  var searchUrl = '/search.asp?q=';
  var bookObj = {};
  var deferred = Q.defer();

  request(domain + searchUrl + pISBN, function(error, response, body) {
    if (!error) {
      var $ = cheerio.load(body);
      var link = $('#team .row .media-heading a').eq(0);
      var targetUrl = $(link).attr('href');

      if (link.length > 0) {
        request(domain + targetUrl, function(error, response, body) {
          if (!error) {
            $ = cheerio.load(body);
            bookObj.source = domain + targetUrl;
            bookObj.Title = $('#team .media-heading')
              .eq(0)
              .text()
              .trim();
            bookObj.ImageUrl = $('#team .pull-left .img-thumbnail').attr('src');
            bookObj.Author = $('#team .m_author')
              .eq(0)
              .text()
              .trim();
            bookObj.Publisher = $('#team .m_author')
              .eq(1)
              .text()
              .trim();
            var infos = ent
              .decode($('#collapseTwo p').html())
              .trim()
              .split('<br>');
            for (var i = 0; i < infos.length; i++) {
              var text = infos[i].split('：');
              if (text.length !== 2) {
                continue;
              }
              var title = text[0],
                content = text[1].trim();

              switch (title) {
                case 'ISBN':
                  bookObj.ISBN = content;
                  break;
                case '出版社':
                  bookObj.Publisher = content;
                  break;
                case '編／譯者':
                  bookObj.Translater = content;
                  break;
                case '語言':
                  bookObj.Language = content.replace('中文繁體', '繁體中文');
                  break;
                case '規格':
                  bookObj.Spec = content;
                  break;
                case '出版日':
                  bookObj.PublishDate = moment(content, 'YYYY/MM/DD').toDate();
                  break;
              }
            }
            deferred.resolve(bookObj);
          } else {
            deferred.resolve(bookObj);
          }
        });
      } else {
        deferred.resolve(bookObj);
      }
    } else {
      deferred.resolve(bookObj);
    }
  });
  return deferred.promise;
};