danbooru/app/assets/javascripts/blacklists.js

(function() {
  Danbooru.Blacklist = {};

  Danbooru.Blacklist.blacklists = [];

  Danbooru.Blacklist.parse_entry = function(string) {
    var blacklist = {
      "tags": string,
      "require": [],
      "exclude": [],
      "disabled": false,
      "hits": 0
    };
    var matches = string.match(/\S+/g) || [];
    $.each(matches, function(i, tag) {
      if (tag.charAt(0) === '-') {
        blacklist.exclude.push(tag.slice(1));
      } else {
        blacklist.require.push(tag);
      }
    });
    return blacklist;
  }

  Danbooru.Blacklist.parse_entries = function() {
    var entries = (Danbooru.meta("blacklisted-tags") || "[]").replace(/(rating:[qes])\w+/, "$1").split(/,/);

    $.each(entries, function(i, tags) {
      var blacklist = Danbooru.Blacklist.parse_entry(tags);
      Danbooru.Blacklist.blacklists.push(blacklist);
    });
  }

  Danbooru.Blacklist.toggle = function(e) {
    $(".blacklisted").each(function(i, element) {
      var $element = $(element);
      if ($element.hasClass("blacklisted-active")) {
        var tag = $(e.target).html();
        var blacklist = Danbooru.Blacklist.parse_entry(tag);

        if (Danbooru.Blacklist.post_match($element, blacklist)) {
          $element.removeClass("blacklisted-active");
        }
      } else {
        $element.addClass("blacklisted-active");
      }
    });
  }

  Danbooru.Blacklist.update_sidebar = function() {
    $.each(this.blacklists, function(i, blacklist) {
      if (blacklist.hits === 0) {
        return;
      }

      var item = $("<li/>");
      var link = $("<a/>");
      var count = $("<span/>");
      link.html(blacklist.tags);
      link.click(Danbooru.Blacklist.toggle);
      count.html(blacklist.hits);
      item.append(link);
      item.append(" ");
      item.append(count);
      $("#blacklist-list").append(item);
    });

    $("#blacklist-box").show();
  }

  Danbooru.Blacklist.apply = function() {
    $.each(this.blacklists, function(i, blacklist) {
      blacklist.hits = 0;
    });

    var count = 0

    $.each(this.posts(), function(i, post) {
      $.each(Danbooru.Blacklist.blacklists, function(i, blacklist) {
        if (Danbooru.Blacklist.post_match(post, blacklist)) {
          Danbooru.Blacklist.post_hide(post);
          blacklist.hits += 1;
          count += 1;
        }
      });
    });

    return count;
  }

  Danbooru.Blacklist.posts = function() {
    return $(".post-preview");
  }

  Danbooru.Blacklist.post_match = function(post, blacklist) {
    var $post = $(post);
    var tags = String($post.data("tags")).match(/\S+/g) || [];
    tags.push("rating:" + $post.data("rating"));
    tags.push("user:" + $post.data("user"));

    if (blacklist.require.length > 0 || blacklist.exclude.length > 0) {
      if (blacklist.require.length === 0 || Danbooru.is_subset(tags, blacklist.require)) {
        if (blacklist.exclude.length === 0 || (!Danbooru.intersect(tags, blacklist.exclude).length)) {
          return true;
        }
      }
    }

    return false;
  }

  Danbooru.Blacklist.post_hide = function(post) {
    var $post = $(post);
    $post.addClass("blacklisted").addClass("blacklisted-active");
  }

  Danbooru.Blacklist.initialize_all = function() {
    Danbooru.Blacklist.parse_entries();

    if (Danbooru.Blacklist.apply() > 0) {
      Danbooru.Blacklist.update_sidebar();
    } else {
      $("#blacklist-box").hide();
    }
  }
})();

$(document).ready(function() {
  Danbooru.Blacklist.initialize_all();
});