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ChiaSeNhac Helper

Download lossless music directly on ChiaSeNhac, bypass sharing dialog.

目前為 2019-10-28 提交的版本，檢視 最新版本。

// ==UserScript==
// @name            ChiaSeNhac Helper
// @name:vi         ChiaSeNhac Helper
// @namespace       https://lelinhtinh.github.io
// @description     Download lossless music directly on ChiaSeNhac, bypass sharing dialog.
// @description:vi  Tải nhạc lossless trực tiếp tại ChiaSeNhac, không cần đăng nhập hoặc chia sẻ lên MXH.
// @version         1.2.2
// @icon            https://i.imgur.com/HLqWP3g.png
// @author          lelinhtinh
// @oujs:author     baivong
// @license         MIT; https://baivong.mit-license.org/license.txt
// @match           https://chiasenhac.vn/*
// @match           https://*.chiasenhac.vn/*
// @require         https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js?v=a834d46
// @noframes
// @supportURL      https://github.com/lelinhtinh/Userscript/issues
// @run-at          document-idle
// @grant           GM.xmlHttpRequest
// @grant           GM_xmlhttpRequest
// ==/UserScript==

(function() {
  'use strict';

  const getFileSize = (url, callback) => {
    GM.xmlHttpRequest({
      url: url,
      method: 'HEAD',
      onload: response => {
        let size = response.responseHeaders;

        size = size.match(/^content-length:\s(\d+)/im);
        if (!size) callback(null);

        size = parseInt(size[1], 10);
        size = (size / 1048576).toFixed(2);
        callback(size);
      },
    });
  };

  const getFlacLink = downloadLink =>
    downloadLink.replace(/\/(128|320|m4a|32)\//, '/flac/').replace(/\.(mp3|m4a)$/, '.flac');

  const $downLossLess = document.querySelector('a.download_item[href="javascript:downLossLessMusic();"]');

  if ($downLossLess) {
    $downLossLess.setAttribute('href', getFlacLink(document.querySelector('a.download_item').href));
    $downLossLess.setAttribute('target', '_blank');
  } else {
    const $down500kbps = document.querySelector('a.download_item[href*="/m4a/"]');
    if (!$down500kbps) return;

    const $parent = $down500kbps.parentNode;
    let tempSize = $down500kbps.textContent.trim().match(/([\d.]+)\sMB$/)[1];
    const flacLink = getFlacLink($down500kbps.href);

    tempSize = Number(tempSize) * 2.4;
    tempSize = parseFloat(tempSize).toFixed(2);

    $parent.insertAdjacentHTML(
      'afterEnd',
      `
            <li>
                <a class="download_item" target="_blank" href="${flacLink}" title="${$down500kbps.title}">
                    <i class="material-icons">file_download</i> Link tải nhạc <span class="c4">FLAC Lossless</span> <span class="fake_size">${tempSize}</span> MB
                </a>
            </li>
        `
    );

    getFileSize(flacLink, size => {
      if (size) document.querySelector('.download_item .fake_size').textContent = size;
    });
  }
})();