计算 bt.neu6.edu.cn 资源价值得分

bt_neu6_scores_calc.user.js

// ==UserScript==
// @name         计算资源价值
// @namespace    https://lightsing.me/
// @version      0.1
// @description  计算 bt.neu6.edu.cn 资源价值得分
// @author       lightsing
// @match        http://bt.neu6.edu.cn/plugin.php?id=neubt_resourceindex*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var $ = document.querySelectorAll.bind(document);
    Element.prototype.find = Element.prototype.querySelectorAll;

    const get_signal = /signal_(\d)/;
    const get_size = /(\d+\.?\d*)\s([GTMK])B/;

    let table = $('.dt')[0];
    let tr = table.find('tr');

    let scores = [document.createElement('th')];
    scores[0].innerText = 'SCORE';
    let max_score = 0;
    for (let i = 1; i < tr.length; i++) {
        let tds = tr[i].find('td');
        let signal = get_signal.exec(tds[1].find('img')[0].src)[1];
        let sizes = get_size.exec(tds[2].innerText);
        let size = sizes[1];
        switch (sizes[2]) {
            case 'T': size *= 1024 * 1024 * 1024; break;
            case 'G': size *= 1024 * 1024; break;
            case 'M': size *= 1024; break;
        }
        var score = document.createElement('td');
        score.innerText = size * (6 - signal);
        if (score.innerText > max_score) {
            max_score = score.innerText;
        }
        scores.push(score);
    }
    for (let i = 1; i < tr.length; i++) {
        scores[i].innerText = (scores[i].innerText / max_score).toFixed(2);
    }
    for (let i = 0; i < tr.length; i++) {
        tr[i].prepend(scores[i]);
    }

    table.innerText = "";
    let result = Array.prototype.slice.call(tr, 0)
    .sort((a, b) => {
      try {
          let x = parseFloat(a.find('td')[0].innerText);
          let y = parseFloat(b.find('td')[0].innerText);
          return x < y ? 1 : x > y ? -1 : 0;
      } catch(_) {
          return 1;
      }
    });
    for (let i = 0; i < tr.length; i++) {
      table.append(result[i]);
    }
    table.prepend(tr[0]);
})();