// ADV Ride Report De-crufter (IE Edition)
// version 1.0
// Release Date: 2009-03-29
// http://bolty.net/from/advrider
// Copyright (c) 2009, Stacy Brock, All Rights Reserved (unless otherwise noted...)
//
// You may modify this script for your own personal use,
// but please contact me first before releasing any changes.
// Don't be an asshat.
//
// ***** INSTRUCTIONS *****
//
// This is an IE7Pro user script.
//
// To use this script, get IE7Pro: http://www.ie7pro.com
//
// Next, save this script to your computer. You should now have a file
// called "adv_ride_report_de-cruft.ieuser.js". Copy this file to
// C:\Program Files\IEPro\userscripts
// Now, start up IE and go to Tools->IE7Pro Preferences. Click on "User
// Scripts" from the list on the left. Make sure the checkboxes next to
// "Enable User Scripts" and "ADV Ride Report De-Crufter (IE Edition)"
// are CHECKED. Click Ok and you should be good to go.
//
// To uninstall, go to Tools->IE7Pro Preferences, click on "User Scripts"
// in the list on the left, select "ADV Ride Report De-crufter" from the
// list, and click Uninstall.
//
// 
// ==UserScript==
// @name           ADV Ride Report De-crufter (IE Edition)
// @namespace      http://bolty.net/from/advrider
// @description    Remove cruft from ride reports on ADVRider, i.e. only show posts from the member who started the thread.
//
// @include        http://www.advrider.com/*
// @include        http://advrider.com/*
// ==/UserScript==

(function() {

  /* Querystring class
   *
   * Copyright (c) 2008, Adam Vandenberg
   * All rights reserved.
   * http://adamv.com/dev/javascript/querystring
   *
   * Client-side access to querystring name=value pairs
   * Version 1.3
   * 28 May 2008
   *
   * License (Simplified BSD):
   * http://adamv.com/dev/javascript/qslicense.txt
   */
  function Querystring(qs) { // optionally pass a querystring to parse
  this.params = {};

  if (qs == null) qs = location.search.substring(1, location.search.length);
  if (qs.length == 0) return;

  // Turn <plus> back to <space>
  // See: http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13.4.1
  qs = qs.replace(/\+/g, ' ');
  var args = qs.split('&'); // parse out name/value pairs separated via &

  // split out each name=value pair
  for (var i = 0; i < args.length; i++) {
    var pair = args[i].split('=');
    var name = decodeURIComponent(pair[0]);

    var value = (pair.length==2)
    ? decodeURIComponent(pair[1])
    : name;

    this.params[name] = value;
  }
}

Querystring.prototype.get = function(key, default_) {
  var value = this.params[key];
  return (value != null) ? value : default_;
}

Querystring.prototype.contains = function(key) {
  var value = this.params[key];
  return (value != null);
}
/* end of Querystring class */

/*
 Developed by Robert Nyman, http://www.robertnyman.com
 Code/licensing: http://code.google.com/p/getelementsbyclassname/
 */
var getElementsByClassName = function (className, tag, elm){
  if (document.getElementsByClassName) {
    getElementsByClassName = function (className, tag, elm) {
      elm = elm || document;
      var elements = elm.getElementsByClassName(className),
      nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
      returnElements = [],
      current;
      for(var i=0, il=elements.length; i<il; i+=1){
        current = elements[i];
        if(!nodeName || nodeName.test(current.nodeName)) {
          returnElements.push(current);
        }
      }
      return returnElements;
    };
  }
  else if (document.evaluate) {
    getElementsByClassName = function (className, tag, elm) {
      tag = tag || "*";
      elm = elm || document;
      var classes = className.split(" "),
      classesToCheck = "",
      xhtmlNamespace = "http://www.w3.org/1999/xhtml",
      namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
      returnElements = [],
      elements,
      node;
      for(var j=0, jl=classes.length; j<jl; j+=1){
        classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
      }
      try	{
        elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
      }
      catch (e) {
        elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
      }
      while ((node = elements.iterateNext())) {
        returnElements.push(node);
      }
      return returnElements;
    };
  }
  else {
    getElementsByClassName = function (className, tag, elm) {
      tag = tag || "*";
      elm = elm || document;
      var classes = className.split(" "),
      classesToCheck = [],
      elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
      current,
      returnElements = [],
      match;
      for(var k=0, kl=classes.length; k<kl; k+=1){
        classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
      }
      for(var l=0, ll=elements.length; l<ll; l+=1){
        current = elements[l];
        match = false;
        for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
          match = classesToCheck[m].test(current.className);
          if (!match) {
            break;
          }
        }
        if (match) {
          returnElements.push(current);
        }
      }
      return returnElements;
    };
  }
  return getElementsByClassName(className, tag, elm);
};
/* end ultimate getElementsByClassName code */


var advRR = {
  showOptionsDiv: function() {
    // get current settings, if any
    var settings = PRO_getValue(queryStr.get("t"), false);
    if (settings) {
      settings = settings.split(/:/);
      advRR.author = settings[0];
      advRR.filter = (settings[1] == "1" ? true : false);
      var op_username = settings[0];
      var advRR_chk = (settings[1] == "1" ? "checked " : "");
    } else {
      // are we on the first page?
      if (!queryStr.contains("page") || queryStr.get("page") == "1") {
        // this is the first page, so get the thread author from the first post
        var allLinks = document.getElementsByTagName("a");
        for (var i=0; i < allLinks.length; i++) {
          if (allLinks[i].className == "bigusername") {
            var op_username = allLinks[i].innerHTML;
            break;
          }
        }
        var advRR_chk = "";
      } else {
        // on a subsequent page, and we have no saved settings, so GTFO
        return;
      }
    }

    if (typeof(op_username) != "undefined") {
      var tmpTDs = getElementsByClassName("smallfont", "td");
      var navTD = tmpTDs[0];

      var newNode = document.createElement("div");
      var innerHTML = "only show <strong>" + op_username + "</strong>'s posts? <input type='checkbox' name='advRR_chk_show' " + advRR_chk + "onclick='return advRRToggle(\"" + op_username + "\");'>";
      newNode.innerHTML = innerHTML;
      navTD.appendChild(newNode);
    }
  },
  getPosts: function () {
    var allTables = document.getElementsByTagName('table');
    for (var i=0; i < allTables.length; i++) {
      if (/^post/.test(allTables[i].id)) {
      advRR.posts.push(allTables[i]);
    }
  }
},
author: "",
filter: false,
posts: []
} // end advRR

// add functions to global window
if (typeof(unsafeWindow) == "undefined") { unsafeWindow = window; }
unsafeWindow.deCruftify = function() {
  if (advRR.author == "") {
    return;
  }
  for (var i=0 ; i < advRR.posts.length; i++) {
    var post = advRR.posts[i];

    var match = post.id.match(/post(\d+)/);
    var post_id = match[1];

    var postmenu = document.getElementById("postmenu_" + post_id);
    rexp = new RegExp(advRR.author);
    if (!rexp.test(postmenu.innerHTML)) {
      if (advRR.filter) {
        post.parentNode.parentNode.parentNode.style.display = "none";
      } else {
        post.parentNode.parentNode.parentNode.style.display = "";
      }
    }
  }
}

unsafeWindow.advRRToggle = function(username) {
  var allInputs = document.getElementsByTagName('input');
  for (var i=0; i < allInputs.length; i++) {
    if (allInputs[i].name == "advRR_chk_show") {
      var advRR_chk_show = allInputs[i];
      break;
    }
  }

  var doSave = false;

  // get query string
  var queryStr = new Querystring();

  // are we on the first page?
  if (!queryStr.contains("page") || queryStr.get("page")=="1") {
    // yes, so save the settings via GM persistent data mechanism
    doSave = true;
  }

  if (advRR_chk_show.checked) {
    if (doSave) {
      PRO_setValue(queryStr.get("t"), username + ":1");
      advRR.author = username;
    }
    advRR.filter = true;
  } else {
    if (doSave) {
      PRO_setValue(queryStr.get("t"), username + ":0");
      advRR.author = username;
    }
    advRR.filter = false;
  }

  // refresh display of posts
  unsafeWindow.deCruftify();
}

// This script requires the PRO_getValue function
if(PRO_getValue) { 
  // get current query string
  var queryStr = new Querystring();

  // are we even viewing a thread?
  if (!queryStr.contains("t")) {
    // nope, so GTFO
    return;
  }

  advRR.getPosts();
  advRR.showOptionsDiv();
  unsafeWindow.deCruftify();
} else {
  alert("ADV de-cruft error: PRO* functions not found");
}

})();