PTS Alpha

PTS Show Alpha.user.js

// ==UserScript==
// @name         PTS Show Alpha
// @namespace    http://tampermonkey.net/
// @version      0.12
// @description  try to take over the world!
// @author       You
// @match        https://pt.btschool.club/torrents.php*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var torrents = document.getElementsByClassName('torrents')[0];
    var alpha = torrents.rows[0].insertCell(-1);
    var ratio = torrents.rows[0].insertCell(-1);
    alpha.innerText = "Alpha";
    ratio.innerText = "Ratio";
    for (var r=1; r<torrents.rows.length; r++){
        alpha = torrents.rows[r].insertCell();
        ratio = torrents.rows[r].insertCell();
        // Calc Ti
        var ti = (Date.now() - Date.parse(torrents.rows[r].cells[3].getElementsByTagName("span")[0].title)) / 1000;
        var tz = new Date();
        ti += tz.getTimezoneOffset() * 60 + 8 * 3600;
        ti /= 86400 * 7;
        // Calc Si
        var sz = torrents.rows[r].cells[4].innerText.split('\n');
        var si = parseFloat(sz[0]);
        if(sz[1] == "KB"){
            si /= 1000000;
        }
        if(sz[1] == "MB"){
            si /= 1000;
        }
        if(sz[1] == "TB"){
            si *= 1000;
        }
        // Get Ni
        var ni = parseFloat(torrents.rows[r].cells[5].innerText);
        // Constant
        var t0 = 200;
        var no = 7;
        // Calc
        alpha.innerText = ((1 - Math.pow(10, -ti / t0)) * si * (1 + 1.1412 * Math.pow(10, (-ni - 1) / (no - 1)))).toFixed(2);
        ratio.innerText = ((1 - Math.pow(10, -ti / t0)) * si * (1 + 1.1412 * Math.pow(10, (-ni - 1) / (no - 1))) / si).toFixed(2);
    }
})();