// ==UserScript==
// @name           Tumblr Shoutr
// @namespace      moz
// @description    Shout out the stuff you really want to see
// @include        http://www.tumblr.com/dashboard
// @include        http://www.tumblr.com/dashboard/*
// @include        http://www.tumblr.com/show/*
// @include        http://www.tumblr.com/tagged/*
// ==/UserScript==
/* made because lmotep said that Tumblr Saviour (savur?) is weaksauce */
/* N.B.: if a post is highlighted, it will not be darkened. */
"use strict";
var dark_style, light_style;
var dark_words, undark_words, light_words, unlight_words;
var ssheet, old_last_li;

// -- config --
/* TODO: put these into a floaty config div block */
dark_style = '.moz_hide {display:none;}';
light_style = '.moz_bright {background:#FFFFFF; color:#CC0000; font-size:125%;}';
dark_words = '#spoilers, #sj';
undark_words = '#kills-dumbledore, #sjsally';
light_words = 'iphone, #homestuck';
unlight_words = '#iphone-sucks, eridan';

// -- main() --
ssheet = document.styleSheets[0];
ssheet.insertRule(dark_style);
ssheet.insertRule(light_style);
old_last_li = 0;

function cook(){
  var dark_re, undark_re, light_re, unlight_re, li_items;
  var current_last_li, i, li_text;
  dark_re = '\\b' + dark_words.replace(/, ?/,'\\b|\\b') + '\\b';
  dark_re = new RegExp(dark_re, "i");
  undark_re = '\\b' + undark_words.replace(/, ?/,'\\b|\\b') + '\\b';
  undark_re = new RegExp(undark_re, "i");
  light_re = '\\b' + light_words.replace(/, ?/,'\\b|\\b') + '\\b';
  light_re = new RegExp(light_re, "i");
  unlight_re = '\\b' + unlight_words.replace(/, ?/,'\\b|\\b') + '\\b';
  unlight_re = new RegExp(unlight_re, "i");
  li_items = document.getElementsByTagName('li');
  current_last_li = li_items.length;
  for(i=current_last_li; i>=old_last_li; i--) {
    if( ! li_items[i].id.match(/^post/) ||
        li_items[i].className.match(/\.moz_bright$|\.moz_dark$/)) {
      continue;
    }
    li_text = li_items[i].textContent;
    if( light_re.test(li_text) &&
        ! unlight_re.test(li_text) ) { 
      li_items[i].className = li_items[i].className + ' .moz_bright';
    }
    else if( dark_re.test(li_text) &&
             ! undark_re.test(li_text) ) {
      li_items[i].className = li_items[i].className + ' .moz_dark';
    }
  }
  old_last_li = current_last_li;
}
/* setInterval() because tumblr likes 'endless-scrolling' pages */
setInterval(cook, 300);