AB stats change

ab-stats-change.user.js

// ==UserScript==
// @name         AB stats change
// @namespace    https://github.com/ewasion
// @version      0.1.1
// @description  Displays the changes in stats on AB
// @author       NullPhantom, Eva
// @homepage     https://gist.github.com/ewasion/8f3875baee474607bda6566126c45c92
// @icon         https://animebytes.tv/favicon.ico
// @updateURL    https://gist.github.com/ewasion/8f3875baee474607bda6566126c45c92/raw/ab-stats-change.user.js
// @downloadURL  https://gist.github.com/ewasion/8f3875baee474607bda6566126c45c92/raw/ab-stats-change.user.js
// @grant        none
// @match        https://animebytes.tv/*
// @license      GPL-3.0
// @run-at       document-end
// ==/UserScript==

(function() {
  'use strict';

  var currentStats = {};
  var statspans = document.querySelectorAll('#stats_menu li > span');
  currentStats.up = parseStats(statspans[0].childNodes[1].textContent);
  currentStats.down = parseStats(statspans[1].childNodes[1].textContent);
  currentStats.ratio = parseFloat(document.querySelector('#stats_menu > a > span').textContent);

  if(isNaN(currentStats.ratio))
    currentStats.ratio = 0;
  currentStats.time=(new Date())*1;

  var oldStats = window.localStorage.lastStats;

  if(!oldStats)
    oldStats = {up:currentStats.up, down:currentStats.down, ratio:currentStats.ratio};
  else
    oldStats = JSON.parse(oldStats);

  window.localStorage.lastStats = JSON.stringify(currentStats);

  var change = {up:currentStats.up-oldStats.up, down:currentStats.down-oldStats.down, ratio:Math.round((currentStats.ratio-oldStats.ratio)*100)/100};

  if(change.up != 0 || change.down != 0 || change.ratio != 0)
    alert('Up: '+renderStats(change.up)+', Down: '+renderStats(change.down)+', Buffer: '+renderStats(change.up-change.down)+', Ratio: '+change.ratio);
})();

function renderStats(number)
{
  var amount = number;
  var pow = 0;
  for(var i=10; i<=50; i=i+10)
  {
    if(Math.abs(amount)/Math.pow(2, i) > 1)
      pow=i/10;
  }
  var suffixes = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB'];
  return (Math.round(amount/Math.pow(2, pow*10)*100))/100+' '+suffixes[pow];
}

function parseStats(string)
{
  string=string.replace(/,/g, '');
  var suffixes = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB'];
  var amount = parseFloat(string);
  if(string.indexOf(suffixes[1]) != -1)
    amount = amount*Math.pow(2, 10);
  else if(string.indexOf(suffixes[2]) != -1)
    amount = amount*Math.pow(2, 20);
  else if(string.indexOf(suffixes[3]) != -1)
    amount = amount*Math.pow(2, 30);
  else if(string.indexOf(suffixes[4]) != -1)
    amount = amount*Math.pow(2, 40);
  else if(string.indexOf(suffixes[5]) != -1)
    amount = amount*Math.pow(2, 50);
  return Math.round(amount);
}