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Lepro Total Comments JS

lepro total comments JS

当前为 2016-07-05 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Lepro Total Comments JS
  3. // @description  lepro total comments JS
  4. // @license      MIT
  5. // @namespace    leprosorium.ru
  6. // @include      http://leprosorium.ru/comments/*
  7. // @include      http://*.leprosorium.ru/comments/*
  8. // @include      http*://leprosorium.ru/comments/*
  9. // @include      http*://*.leprosorium.ru/comments/*
  10. // @copyright    2016, lynxtaa
  11. // @grant        none
  12. // @version      1.1
  13. // ==/UserScript==
  14.  
  15.  
  16. var BEST_TRESHOLD = 0.75;
  17.  
  18. var controls = document.getElementById('js-comments').querySelector('.b-comments_controls'),
  19. 	comments_holder = document.getElementById('js-comments_holder'),
  20. 	style = document.createElement('style'),
  21. 	best = document.createElement('a'),
  22. 	all = document.createElement('a'),
  23. 	std_dev,
  24. 	best_count;
  25.  
  26. style.textContent = ".is_hidden { display: none; }";
  27. document.body.appendChild(style);
  28.  
  29.  
  30. // Кнопки управления
  31. best.textContent = 'лучшее';
  32. all.textContent = 'все';
  33. controls.appendChild(best);
  34. controls.appendChild(all);
  35.  
  36.  
  37. // Лучшее
  38. best.addEventListener('click', function(e) {
  39. 	e.preventDefault();
  40. 	if (this.className === 'active') {
  41. 		return false;
  42. 	} else if (std_dev) {
  43. 		document.body.appendChild(style);
  44. 	} else {
  45. 		var votes = comments_holder.querySelectorAll('strong.vote_result');
  46. 		var	rating;
  47. 		best_count = votes.length;
  48. 		std_dev = (getStdDev(votes) || 0.1);
  49. 		for (var i = 0; i < votes.length; i++) {
  50. 			rating = parseInt(votes[i].textContent);
  51. 			if ( rating > 0 && (rating / std_dev) < BEST_TRESHOLD) {
  52. 				hideComment(votes[i]);
  53. 			}
  54. 		}
  55. 		this.setAttribute('title', best_count);
  56. 	}
  57.  
  58. 	this.className = 'active';
  59. 	this.nextSibling.className = '';
  60. }, false);
  61.  
  62.  
  63. // Показать всё
  64. all.addEventListener('click', function(e) {
  65. 	e.preventDefault();
  66. 	if (std_dev && this.className !== 'active') {
  67. 		this.className = 'active';
  68. 		this.previousSibling.className = '';
  69. 		document.body.removeChild(style);
  70. 	}
  71. }, false);
  72.  
  73.  
  74. // Среднеквадратическое отклонение
  75. function getStdDev(votes) {
  76. 	var	abovenull = 0,
  77. 		rating_square_sum = 0,
  78. 		rating_sum = 0,
  79. 		rating;
  80.  
  81. 	for (var i = 0; i < votes.length; i++) {
  82. 		rating = parseInt(votes[i].textContent);
  83. 		if ( rating > 0 ) {
  84. 			abovenull++;
  85. 			rating_sum += rating;
  86. 			rating_square_sum += Math.pow(rating, 2);
  87. 		} else {
  88. 			hideComment(votes[i]);
  89. 		}
  90. 	}
  91. 	
  92. 	abovenull = (abovenull || 1);
  93. 	return Math.sqrt( (rating_square_sum / abovenull) -
  94. 				Math.pow((rating_sum / abovenull), 2) );
  95. }
  96.  
  97.  
  98. // Прячем
  99. function hideComment(el) {
  100. 	while (!el.classList.contains('comment')) {
  101. 		el = el.parentNode;
  102. 		if (el === document) {
  103. 			throw new Error('Can\'t find comment container.');
  104. 		}
  105. 	}
  106. 	el.classList.add('is_hidden');
  107. 	best_count--;
  108. }