非公式RTの引用元を探して表示する twicli プラグイン

seek_rt_origin.js

var seekRTOrigin;
(function () {
  // RTをクリックできるようにする
  function makeRTClickable(element, tw) {
    if (tw.retweeted_status && !display_as_rt) {
      tw = tw.retweeted_status;
    }
    var status = element.getElementsByClassName('status'); // getElementsByClassName使ってるのでIEでは動かない？
    if (status.length > 0) {
      status = status[0];
      for (var i = 0; i < status.childNodes.length; i++) {
        var node = status.childNodes[i];
        if (node.nodeName == '#text'
        && node.textContent.match(/^(.*)(RT|QT)(\s*)$/)
        && node.nextSibling
        && node.nextSibling.nodeName.toUpperCase() == 'A'
        && node.nextSibling.textContent.indexOf('@') == 0) {
          //console.log(['RT detected', tw.id_str, status]);
          node.textContent = RegExp.$1;
          var seekrt = document.createElement('span');
          seekrt.textContent = RegExp.$2 + RegExp.$3;
          seekrt.className = 'urt';
          seekrt.style.cursor = 'pointer';
          seekrt.style.color = '#DD0000';
          seekrt.setAttribute('onclick',
            "seekRTOrigin('"
            + tw.id_str
            + "',this);return false;"
          );
          node.parentNode.insertBefore(seekrt, node.nextSibling);
        }
      }
    }
  }

  // ボタンから呼ばれる
  seekRTOrigin = function (id, elem) {
    var sibl = elem.nextSibling;
    var user = sibl.textContent.slice(1);
    var text = '';
    while (sibl = sibl.nextSibling) {
      text += sibl.textContent;
    }
    text = text.replace(/(^:?\s*)/, '');
    var seektext = text.replace(/https?:\/\/.*$/, ''); // URLは書き換えられているかもしれないので捨てる
    seektext = seektext.replace(/\s*[\(（].{0,2}\s*$/, ''); // 適当に捨てる
    seektext = seektext.replace(/\s*(\.+|…+)\s*$/, ''); // 適当に捨てる
    //console.log(['seekRTOrigin', id, user, seektext]);
    searchUserTweet(user, seektext, id, function (tws) {
      dispOverlay(tws, elem);
    });
    
  };
  
  // max_id より前の200件について調べる
  function searchUserTweet(user, text, max_id, callback) {
    var url = twitterAPI + 'statuses/user_timeline.json?screen_name=' + user + '&suppress_response_codes=true&count=200';
    if (max_id) {
      url += ('&max_id=' + max_id);
    }
    $('loading').style.display = 'block';
    xds.load(url, function (tws) {
      console.log(['searchUserTweet', user, text, tws]);
      var matched = tws.filter(function (tw) { return tw.text.indexOf(text) == 0; });
      $('loading').style.display = 'none';
      callback(matched);
    });
  }
  
  function dispOverlay(tws, elem) {
    if (tws.length == 0) return;
    console.log(['dispOverlay', tws]);
    var elem_top = cumulativeOffset(elem)[1] + 20;
    rep_top = elem_top;
    $('reps').innerHTML = '';
    $('rep').style.top = elem_top;
    for (var i = 0; i < tws.length; i++) {
      var tw = tws[i];
      var el = document.createElement('div');
      el.id = 'reps-'+tw.id_str;
      el.innerHTML = makeHTML(tw, false, 'reps');
      el.tw = tw;
      callPlugins('newMessageElement', el, tw, 'reps');
      $('reps').appendChild(el);
    }
    $('rep').style.display = 'block';
    scrollToDiv($('rep'));
  }
  
  registerPlugin({
    newMessageElement: makeRTClickable
    //afterTwShowToNode: autoEmbed
  });

})();