Post = {
  posts: new Hash(),
  blacklist_options: {replace: true},

  register: function(post) {
    post.tags = post.tags.match(/\S+/g)

    if (!post.tags)
      post.tags = []

    post.match_tags = post.tags.clone()
    post.match_tags.push("rating:" + post.rating.charAt(0))
    post.match_tags.push("status:" + post.status)
    post.match_tags.push("user:" + post.author.toLowerCase())
    post.match_tags.push("id:"+post.id)
    post.match_tags.push("type:"+post.file_ext)

    // These won't actually work for blacklisting until it's rewritten to take into account comparison/ranges (score:<0)
    post.match_tags.push("score:"+post.score)
    post.match_tags.push("width:"+post.width)
    post.match_tags.push("height:"+post.height)

    this.posts.set(post.id, post)
  },

  blacklists: [],

  is_blacklisted: function(post_id) {  // you can't have side effects like ++b.hits in a method called "is_blacklisted", ffs
    var post = this.posts.get(post_id)
    var has_tag = post.match_tags.member.bind(post.match_tags)
    return Post.blacklists.any(function(b) {
      return (b.require.all(has_tag) && !b.exclude.any(has_tag))
    })
  },

  apply_blacklists: function() {
    Post.blacklists.each(function(b) { b.hits = 0 })

    var count = 0

    Post.posts.each(function(pair) {
      var thumbs = $$("#p" + pair.key)

      if (thumbs.length == 0)
        return;

      var post = pair.value
      var has_tag = post.match_tags.member.bind(post.match_tags)
      post.blacklisted = []

      Post.blacklists.each(function(b) {
        if (b.require.all(has_tag) && !b.exclude.any(has_tag)) {
          b.hits++

          if (!b.disabled)
            post.blacklisted.push(b)
        }
      })

      bld = post.blacklisted.length > 0
      count += bld

      thumbs.each(function(thumb) {
        if (Post.blacklist_options.replace) {
          var img = thumb.down('img')
          var isavatar = (img.parentNode.parentNode.className.indexOf("thumb_avatar") != -1)

          if (bld && ((isavatar && (Cookie.get("blacklist_avatars") == "true")) || !isavatar)) {
            img.src   = "/images/blacklisted-preview.png"
            img.setAttribute('data-original', "/images/blacklisted-preview.png");
            img.width = img.height = 150
          }
          else {
            img.setAttribute('data-original', post.preview_url);
            img.src    = post.preview_url
            img.width  = post.preview_width
            img.height = post.preview_height
          }

          thumb.removeClassName('blacklisted');
        }
        else {
          if (bld)
            thumb.addClassName('blacklisted');
          else
            thumb.removeClassName('blacklisted');
        }
      });
    })

    if (Post.countText)
      $j('#blacklist-count').html(count);

    return count
  },

  init_blacklisted: function (options) {
    Post.blacklisted=[];
    Post.blacklists=[];
    Post.blacklist_options = Object.extend(Post.blacklist_options, options);
    var bl_entries = Cookie.get("blacklisted_tags").split(/[&,]/);

    bl_entries.each(function (val) {
      var s = Cookie.unescape(val).replace(/(rating:[qes])\w+/, "$1");
      var tags = s.match(/\S+/g);

      if (!tags)
        return;

      var b = {tags: tags, require: [], exclude: [], disabled: false, hits: 0};

      tags.each(function (tag) {
        Post.blacklisted_user(tag);

        if (tag.charAt(0) == "-")
          b.exclude.push(tag.slice(1));
        else
          b.require.push(tag);
      });

      Post.blacklists.push(b);});

    var sidebar = $("blacklisted-sidebar");

    if (!sidebar) {
      Post.apply_blacklists();
      return;
    };

    var blacklist_count = $("blacklist-count");

    if (blacklist_count && !Post.countText)
      Post.countText = blacklist_count.appendChild(document.createTextNode(""));

    if (!Post.apply_blacklists()) {
      sidebar.hide();
      return;
    }

    sidebar.show();
    sidebar.observe("mousedown", function (event) {event.stop();});
    var list = $("blacklisted-list");

    while (list.childNodes.length>1) {
      list.removeChild(list.childNodes[1]);
    }

    Post.blacklists.each(function (b) {
      if (!b.hits)
        return;

      var li = list.appendChild(document.createElement("li"));
      li.className = "blacklisted-tags";
      var a = li.appendChild(document.createElement("a"));
      a.href = "#";
      var expand = a.appendChild(document.createTextNode("\xBB"));

      a.observe("click", function (event) {
        b.disabled = !b.disabled;
        a.className = b.disabled ? "blacklisted-tags-disabled" : "blacklisted-tags";
        Post.apply_blacklists();
        event.stop();
      });

      a.appendChild(document.createTextNode(" "));
      var tags = a.appendChild(document.createTextNode(b.tags.join(" ")));
      li.appendChild(document.createTextNode(" "));
      var span = li.appendChild(document.createElement("span"));
      span.className = "post-count";
      span.appendChild(document.createTextNode(b.hits));
    });
  },

  blacklisted_user: function(tag) {
    if (Cookie.get("blacklist_users") == "true") {
      var pattern=/user:/i;
      if (pattern.test(tag)) {
        var username = tag.replace(pattern, "").toLowerCase();
        jQuery("div[data-author='" + username +"'], tr[data-author='" + username +"']").each(function(){
          jQuery(this).hide();
        });
      }
    }
  }
}