NPC Code:

---

// ==UserScript==

// @name           gforum-pavatars

// @namespace      http://ilfirin.org/

// @description    Follow homepage links and check for pavatars for every post

// @include        http://forums.graalonline.com/forums/showthread.php?*

// @include        http://forums.graal2001.com/forums/showthread.php?*

// @include        http://forums.graalgraalonline.com/forums/showpost.php?*

// @include        http://forums.graal2001.com/forums/showpost.php?*

// ==/UserScript==



function getUserId(postId) {

  var reps = document.evaluate(

    '//span[starts-with(@id, "repdisplay_' + postId + '_")]',

    document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null)

  for (var i = 0; i < reps.snapshotLength; ++i) {

    var id = reps.snapshotItem(i).getAttribute('id')

    var index = id.lastIndexOf('_')

    if (index == -1) continue

    return id.substr(index+1)

  }

}



function getLink(td) {

  var link = td.firstChild

  if (!link || link.tagName != 'A') return

  var textNode = link.firstChild

  if (!textNode) return

  var text = textNode.nodeValue

  if (!text

      || text.substr(0, 6) != "Visit "

      || text.substr(text.length - 12) != "'s homepage!") return



  return link.getAttribute('href')

}



function sanify(link) {

  // what happened to find_first_of?

  if (link.indexOf('?') != -1) return

  if (link.indexOf('@') != -1) return

  if (link.indexOf('forums.graal') != -1) return

  if (link.substr(0, 7) != 'http://') return

  return link

}



function getPavatar(resp) {

  var r = /X-Pavatar:\s+([^\r\n]+)/i.exec(resp.responseHeaders)

  if (r) return r[1]

  var doc = new DOMParser().parseFromString(resp.responseText, 'text/xml')

  //// xpath does not appear to work here?

  //var links = doc.evaluate(

  //  '/html/head/link[@rel="pavatar"]',

  //  doc, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null)

  //for (var i = 0; i < links.snapshotLength; ++i) {

  //  var link = links.snapshotItem(i)

  var links = doc.getElementsByTagName('link')

  for (var i = 0; i < links.length; ++i) {

    var link = links[i]

    if (link.getAttribute('rel') != 'pavatar') continue

    var href = link.getAttribute('href')

    if (href) return href

  }

}



function addClass(elem, className) {

  // elem.classList.add("customAvatar") -- only FF 3.6 and up

  var oldClassList = elem.getAttribute('class')

  if (!oldClassList)

    elem.setAttribute('class', className)

  else

    elem.setAttribute('class', oldClassList + ' ' + className)

}



function setPavatar(userId, pavatar) {

  var avs = document.evaluate(

    '//img[starts-with(@src, "image.php?u=' + userId + '&")]',

    document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null)

  for (var i = 0; i < avs.snapshotLength; ++i) {

    var av = avs.snapshotItem(i)

    av.setAttribute('src', pavatar)

    av.removeAttribute('width')

    av.removeAttribute('height')

    addClass(av, 'customAvatar')

  }

}



function combine(base, href) {

  if (href.substr(0, 1) == '/') {

    var i = base.indexOf('/', 8)

    if (i == -1)

      return base + href

    else

      return base.substr(0, i) + href

  } else if (href.substr(0, 7) == 'http://') {

    return href

  } else {

    return base + '/' + href

  }

}



function onLoadCallback(link, userId) {

  return function(resp) {

    if (resp.status != 200) return

    var pavatar = getPavatar(resp)

    if (pavatar)

      setPavatar(userId, combine(link, pavatar))

  }

}



function checkAvatar(link, userId) {

  link = sanify(link)

  if (!link) return

  GM_xmlhttpRequest({

    'method': 'GET',

    'url': link, 

    'headers': {'Accept': 'text/html,application/xhtml+xml'},

    'onload': onLoadCallback(link, userId)

  })

}



var handledUsers = {}



var tds = document.evaluate(

  '//td[@class="vbmenu_option"]',

  document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null)



for (var i = 0; i < tds.snapshotLength; ++i) {

  var td = tds.snapshotItem(i)

  var link = getLink(td)

  if (!link) continue

  var node

  for (node = td.parentNode;

       node && node.tagName != 'TABLE';

       node = node.parentNode)

    ;

  var postIdLabel = node.parentNode.getAttribute('id')

  var postId = postIdLabel.substring(9, postIdLabel.length - 5)

  var userId = getUserId(postId)

  if (!userId || handledUsers[userId]) continue

  handledUsers[userId] = true

  checkAvatar(link, userId)

}



var style = document.createElement('style')

style.setAttribute('type', 'text/css')

style.appendChild(document.createTextNode('                                  \

  .customAvatar {                                                            \

    max-width:          192px ! important;                                   \

    max-height:         272px ! important;                                   \

  }                                                                          \

'))

document.getElementsByTagName('head')[0].appendChild(style)

---