// ==UserScript==
// @namespace mrob.com
// @name blindposter for OTT
// @description Hide the "TOPIC REVIEW" section, so you can make a blindpost without being spoiled by anything you might see there
// @author Robert Munafo and Balthasar Szczepański
// @version 9924.26
// @downloadURL http://mrob.com/time/scripts-beta/blindposter.user.js.txt
// @include http://forums.xkcd.com/posting.php*
// @include http://fora.xkcd.com/posting.php*
// @include http://echochamber.me/posting.php*
// ==/UserScript==

// REVISION HISTORY:
//
// np7936.14 First version
// np7977.62 Add a prominent message saying 'Topic Review hidden by
//   blindposter script' to remind user they're using this script
// np7979.02 Recognize and hide any 'ninja' posts
// np7980.35 Do not hide my own post preview
// np8001.35 Remove outdated comments
// np8248.58 Do nothing unless we're posting to the OTT (t=101043)
// np9748.14 Try to detect the page you get from hitting the quote button
//   (which stupidly does not contain 'f=101043')
// np9924.26 Prevent previevninjas from appearing

blindposter = {
  hideit: function(elem) {
    elem.style.display="none";

    var container = elem.parentNode;

    var notice = document.createElement('div');

    var text1 = document.createTextNode(
                                   "(Content hidden by blindposter script)");
    notice.style.fontSize = '18.0px';
    notice.style.fontStyle = 'italic';
    notice.style.fontWeight = 'bold';
    notice.style.color = '#0B7';

    notice.appendChild(text1);

    container.insertBefore(notice, elem);
  },

  convert: function() {
    var topicreview = document.getElementById("topicreview");
    if (topicreview) {
      this.hideit(topicreview);
    };

    /* Look for the preview of our own post, so we can avoid hiding it
       during the next bit. */
    var preview = document.getElementById("preview");

    /* If you 'Submit' a post and a new post has been submitted by someone
       else since the last time you did a 'Preview', it presents the message:

           "At least one new post has been made to this topic.
            You may wish to review your post in light of this."

       followed by one or more messages formatted the normal way in
       tags like <div class="post bg2">. So we hide those too. */
    var i;
    var inners = document.getElementsByClassName('post bg1');
    for(i=0 ; i<inners.length ; i++) {
      if (inners[i] != preview) {
        this.hideit(inners[i]);
      }
    };
    inners = document.getElementsByClassName('post bg2');
    for(i=0 ; i<inners.length ; i++) {
      if (inners[i] != preview) {
        this.hideit(inners[i]);
      }
    };

    /* Ordinarily, if another person makes a post while this post was being
       edited, the forum gives you a page that encourages you to look at
       those posts and click Submit again. But since we're hiding the preview
       of those other posts, the step becomes pointless. Here we prevent that
       extra step. From Balthasar:
          if the form fields topic_cur_post_id and lastclick are not sent, the
       fora will not know which ninjaposts to show, and won't show any. */
    inners = document.getElementsByName('topic_cur_post_id');
    for(i=0 ; i<inners.length ; i++) {
      if(   inners[i].nodeName == 'INPUT'){
            inners[i].parentNode.removeChild(inners[i]);
         }
    };
    inners = document.getElementsByName('lastclick');
    for(i=0 ; i<inners.length ; i++) {
      if(   inners[i].nodeName == 'INPUT'){
            inners[i].parentNode.removeChild(inners[i]);
         }
    };
  }
};

if (    (location.href.indexOf('t=101043') != -1)
     || (location.href.indexOf('quote&f=7') != -1) ) {
  // 3 cases for cross-platform, cross-browser: not necessary for this
  // application but I want this code to be useful elsewhere too!
  if (window.addEventListener) {
    window.addEventListener('DOMContentLoaded', // was 'load',
      blindposter.convert.bind(blindposter), false);
  } else if (window.attachEvent) {
    window.attachEvent('onload',
      blindposter.convert.bind(blindposter));
  } else {
    blindposter.convert(blindposter);
  }
};