duoshuo-sso.js

var protocol = document.location.protocol === 'https:' ? 'https:' : 'http:';

var ds = document.createElement('script');
ds.type = 'text/javascript';
ds.async = true;
ds.src = protocol + '//static.duoshuo.com/embed.js';
document.getElementsByTagName('head')[0].appendChild(ds);

module.exports = function(cb) {
  if (!duoshuoQuery.sso || !duoshuo.sso.login) return;

  ds.onload = function() {
    if (DUOSHUO) {
      load(cb);
    } else {
      setTimeout(function() {
        load(cb);
      }, 3000);
    }
  };
};


function load(cb) {
  if (!DUOSHUO) return;

  var v = DUOSHUO.visitor;

  v.on('reset', function() {
    if (!v.data) return;
    if (!v.data.social_uid) return;

    var name = 'weibo';

    /* TODO: add more services;
    var names = ['weibo'];

    for (var i = 0; i < names.length; i++) {
      if (v.data.social_uid[names[i]]) {
        name = names[i];
        break;
      }
    }
    */

    var base = protocol + duoshuoQuery.short_name + '.duoshuo.com/login/';

    var query = 'sso=1&redirect_uri=' + encodeURIComponent(duoshuoQuery.sso.login);

    var ifr = document.createElement('iframe');
    ifr.style.display = 'none';
    ifr.src = base + name + '/?' + query;

    var $ = DUOSHUO.jQuery;

    ifr.onload = function() {
      var data = $(ifr.contentDocument.body).text();
      data = $.parseJSON(data);
      cb(data);
      document.body.removeChild(ifr);
    };

    document.body.appendChild(ifr);
  });
}