/* avatar injection: find author links, prepend the user's avatar.
   repo-root prefix is derived from the author link itself so this
   works under any URL prefix (repolist, CGI, ...). */
(function(){
  function repoRootFrom(href){
    var m = href.match(/^(.*)\/(timeline|forumpost|info)([?\/]|$)/);
    return m ? m[1] : "";
  }
  function injectInto(link){
    var m = link.href.match(/[?&]u=([^&"]+)/);
    if( !m ) return;
    if( link.parentNode.querySelector("img.avatar") ) return;
    var img = document.createElement("img");
    img.className = "avatar";
    img.alt = "";
    img.src = repoRootFrom(link.getAttribute("href")) + "/uv/avatars/" + m[1] + ".png";
    img.onerror = function(){ img.remove(); };
    link.parentNode.insertBefore(img, link);
  }
  function scan(){
    var sel = ".forumPostHdr a[href*='u='], .timelineModernDetail a[href*='u='], .timelineColumnarDetail a[href*='u=']";
    document.querySelectorAll(sel).forEach(injectInto);
  }
  if( document.readyState === "loading" ){
    document.addEventListener("DOMContentLoaded", scan);
  }else{
    scan();
  }
})();