// ==UserScript==
// @name        FFN Filters Auto-Select
// @description Auto-selects fanfiction.net filters.
// @include     *://*.fanfiction.net/*
// @include     *://*.fictionpress.com/*
// @version     1.3
// @grant       none
// @copyright   2014+, Azurewren
// @history     1.3 Added comments/documentation.
// @history     1.2 Bug fixing.
// @history     1.1 Bug fixing.
// @history     1.0 First Version. 
// @namespace https://greasyfork.org/users/3972
// @downloadURL none
// ==/UserScript==

// SETTING PREFERENCES
// All values should be exact. Setting name should not be the same name as on ffn. 
// Format: 'setting name for filter: "exact name as filter preference option",' 
settings = {
  language: 'English',
  rating: 'Rating: All',
  wordlength: '20K words'
}

var $ = unsafeWindow.$;
var filter = $('form[name="myform"]');

// SETTINGS
// For each setting up above, include a line for it below. Settingvariablename should be defined up above. 
// Format: 'ffn filtername: {prefer: settings.settingvariablename, default: '0'},'
var filteroptions = {
  languageid: {
    prefer: settings.language,
  default:
    '0'
  },
  censorid: {
    prefer: settings.rating,
  default:
    document.URL.search('fanfiction.net/community/') === - 1 ? '103' : '3'
  },
  length: {
    prefer: settings.wordlength,
  default:
    '0'
  }
};

function select(values, name) {
  var filteroption = filter.find('select[name="' + name + '"]');
  if (filteroption.val() === values.default) {
    var option = filteroption.find('option:contains("' + values.prefer + '")');
    return option.length && filteroption.val(option.val());
  }
}

if ($.map(filteroptions, select).some(function (a) {
  return a;
})) {
  filter.find('span.btn-primary, input[type="Submit"]').click();
}