// ==UserScript==
// @name        LOR spoiler
// @namespace   linux.org.ru
// @description Add spoiler functionality
// @include     https://linux.org.ru/*
// @include     https://www.linux.org.ru/*
// @version     2
// @grant       none
// ==/UserScript==

$script.ready('jquery',function(){
  console.log('LOR spoiler is ON');

  // spoiler
  var types = ['cut', 'code', 'pre'];
  var blocks = {
    cut: $('[id ^= cut]'),
    code: $('.code'),
    pre: $('pre:not([class])')
  };
  var translate = {cut:'текст', code:'код', pre:'блок'};

  var total_block_cnt = blocks.cut.length + blocks.code.length + blocks.pre.length;
  var line_limit = total_block_cnt > 2 ? 5 : 15;

  var spoiler_prefix_on = 'Показать';
  var spoiler_prefix_off = 'Скрыть';

  var tpl =
    '<p>'+
      '<span>&gt;&gt;&gt;&nbsp;</span>'+
      '<a class="tag"'+
      'id="spoiler-hide-{TYPE}_{ID}" '+
      'href="javascript:void(0);" '+
      'onClick="javascript:var block=$(\'#hide-{TYPE}_{ID}\');'+
        'if (block.css(\'display\')===\'none\') {'+
          'block.show(); this.innerText=this.innerText.replace(\''+spoiler_prefix_on+'\', \''+spoiler_prefix_off+'\'); } else {'+
          'block.hide(); this.innerText=this.innerText.replace(\''+spoiler_prefix_off+'\', \''+spoiler_prefix_on+'\'); };">'+
      spoiler_prefix_on + '&nbsp;{TYPE:tr}'+
      '</a>'+
    '</p>';

  // change content
  if (total_block_cnt > 0) {
    for (var i = 0; i < types.length; i++) {
      var TYPE = types[i];
      var ID = 0;

      blocks[TYPE].each(function() {
        // limit
        var no_hl = $(this).find('pre.no-highlight code');
        var cur_blk = no_hl.length > 0 ?  no_hl : $(this);
        if (cur_blk.text().split("\n").length <= line_limit) return;

        // add spoiler
        var spoiler = tpl.replace(/\{TYPE\}/g, TYPE).replace(/\{ID\}/g, ID).replace(/\{TYPE:tr\}/g, translate[TYPE]);
        $(this).attr('id','hide-'+TYPE+'_'+ ID).hide();
        $(this).before(spoiler);

        ID++;
      });
    }
  }
});