vampireneo/Book

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

exports.getByISBN = function(pISBN) {
  var domain = 'http://www.hkbookcity.com/';
  var searchUrl = 'searchbook2.php?startnum=1&key=isbn&keyword=';
  var bookObj = {};
  var deferred = Q.defer();

  //console.log("get url: " + domain + searchUrl + pISBN);
  request(domain + searchUrl + pISBN, function(error, response, body) {
    if (!error) {
      var $ = cheerio.load(body);
      var link = $('.booktitle')
        .eq(0)
        .closest('a');
      var targetUrl = domain + $(link).attr('href');

      if (link.length > 0) {
        request({ url: targetUrl, encoding: null }, function(
          error,
          response,
          body
        ) {
          if (!error) {
            body = iconv.decode(new Buffer(body), 'big5');
            $ = cheerio.load(body);
            bookObj.source = targetUrl;
            bookObj.Title = $("table img[src='image/bookname.gif']")
              .siblings()
              .find('font')
              .text()
              .trim();
            bookObj.ImageUrl =
              domain +
              $("table img[src*='image_book/']")
              .eq(0)
              .attr('src');
            var infos = $("table img[src*='image_book/']")
              .eq(0)
              .closest('tr')
              .find('table tr');
            for (var i = 0; i < infos.length; i++) {
              var title = $(infos[i])
                .find('td')
                .eq(0)
                .text()
                .trim(),
                content = $(infos[i])
                .find('td')
                .eq(1)
                .text()
                .trim();

              switch (title) {
                case '作者:':
                  bookObj.Author = content;
                  break;
                case 'ISBN-13:':
                  bookObj.ISBN = content;
                  break;
                case '出版社:':
                  bookObj.Publisher = content;
                  break;
                case '出版日期:':
                  bookObj.PublishDate = moment(content, 'YYYY/MM').toDate();
                  break;
                case '頁數:':
                  bookObj.Pages = content;
                  break;
              }
            }
            deferred.resolve(bookObj);
          } else {
            deferred.resolve(bookObj);
          }
        });
      } else {
        deferred.resolve(bookObj);
      }
    } else {
      deferred.resolve(bookObj);
    }
  });
  return deferred.promise;
};