/* 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();
  }
})();

/* quick post: titleless microblogging on the forum list page.
   the thread title fossil requires is derived from the first line. */
(function(){
  function root(){
    return location.pathname.replace(/\/forum\/?$/, "");
  }
  function deriveTitle(text){
    var line = text.split("\n")[0].replace(/\s+/g, " ").trim();
    if( line.length > 80 ) line = line.slice(0, 77) + "...";
    return line;
  }
  function setup(){
    if( !/cpage-forum\b/.test(document.body.className) ) return;
    var content = document.querySelector(".content");
    if( !content ) return;
    var box = document.createElement("div");
    box.className = "quickpost";
    var ta = document.createElement("textarea");
    ta.placeholder = "what's on your mind?";
    var bar = document.createElement("div");
    bar.className = "qp-bar";
    var hint = document.createElement("span");
    hint.className = "qp-hint";
    hint.textContent = "no title needed — posts straight to the board";
    var btn = document.createElement("input");
    btn.type = "submit";
    btn.value = "post";
    bar.appendChild(hint);
    bar.appendChild(btn);
    box.appendChild(ta);
    box.appendChild(bar);
    var h = content.querySelector("h1, h2, .submenu");
    content.insertBefore(box, h ? h.nextSibling : content.firstChild);
    btn.addEventListener("click", function(){
      var text = ta.value.trim();
      if( !text ) return;
      btn.disabled = true;
      fetch(root() + "/forumnew", { credentials: "same-origin" })
        .then(function(r){ return r.text(); })
        .then(function(page){
          var m = page.match(/name="csrf" value="([^"]+)"/);
          if( !m ) throw new Error("no csrf");
          var body = new URLSearchParams();
          body.set("title", deriveTitle(text));
          body.set("content", text);
          body.set("mimetype", "text/x-markdown");
          body.set("csrf", m[1]);
          body.set("submit", "Submit");
          return fetch(root() + "/forume1", {
            method: "POST",
            credentials: "same-origin",
            headers: { "Content-Type": "application/x-www-form-urlencoded" },
            body: body.toString()
          });
        })
        .then(function(){ location.reload(); })
        .catch(function(){ btn.disabled = false; });
    });
  }
  if( document.readyState === "loading" ){
    document.addEventListener("DOMContentLoaded", setup);
  }else{
    setup();
  }
})();