require('twsidebar');

(function () {
  let Config = liberator.globalVariables.twittperator_sidebar_expand_url_config || {
    host: ['ff.im', 'is.gd', 't.co', 'bit.ly', 'j.mp', 'htn.to', 'goo.gl', 'ow.ly'],
    filter: function (url) {
      return url.length > 60 ? url.substr(0, 60) + '...' : url;
    }
  }

  function isShorten(uri)
    Config.host.indexOf(uri.host) >= 0 ? true : false;

  function expandURL (url, callback) {
    let uri = util.createURI(url);
    if (isShorten(uri)) {
      let xhr = new XMLHttpRequest;
      xhr.open('HEAD', uri.spec, true);
      xhr.setRequestHeader('User-Agent', 't.co'); // t.co対策
      xhr.onreadystatechange = function () {
        if (xhr.readyState == 4) {
          callback(xhr.channel.URI.spec, url);
        }
      }
      xhr.send();
    } else {
      callback(url, false);
    }
  }

  // twsidebar.twの直接呼びたい
  function escapeBreakers (text)
    text.replace(/[\x00-\x08\x0b\x0c\x0e-\x1f]+/g, function(c) uneval(c));

  function sidebar ()
    document.getElementById('sidebar')._contentWindow.document;

  function twsText (id) {
    try {
      return sidebar().getElementById(id).childNodes[1].childNodes[3].childNodes[3].firstChild;
    } catch (e) {
      return void 0;
    }
  }

  function scroll () {
    let tws = sidebar().getElementById('tw-anekos-sb-home-list');
    let len = tws.itemCount;
    tws.scrollToIndex(len - 1);
  }

  function replaceURL (tweet, id, urls) {
    for (let i in urls) {
      let sUrl = urls[i].url;
      expandURL(urls[i].expanded_url, function (eUrl , expand) {
        tweet.text = tweet.text.replace(sUrl, eUrl);
        let fUrl = expand ? sUrl : eUrl;
        setTimeout(function () {
          let e = twsText(id);
          if (e) {
            e.textContent = escapeBreakers(e.textContent.replace(fUrl, Config.filter(eUrl)));
            scroll();
          }
        }, 100);
      });
    }
  }

  function onMsg (msg, raw) {
    if (!msg.entities) { return; }
    let tweet = (msg.retweeted_status) ? msg.retweeted_status : msg;
    if (tweet.entities.urls[0]) {
      replaceURL(tweet, msg.id, tweet.entities.urls);
    }
    if (tweet.entities.media && tweet.entities.media[0]) {
      replaceURL(tweet, msg.id, tweet.entities.media);
    }
  }

  plugins.twittperator.ChirpUserStream.addListener(onMsg);
  plugins.twittperator.TrackingStream.addListener(onMsg);
})();

// vim: ft=javascript: