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BC: do free downloads

adds a link that triggers buy for $0; set format to FLAC and click download.

当前为 2022-10-19 提交的版本，查看 最新版本。

// ==UserScript==
// @name        BC: do free downloads
// @namespace   userscript1
// @match       https://*.bandcamp.com/*
// @match       https://*.bandcamp.com/*
// @match       https://bandcamp.com/download
// @grant       none
// @version     0.2.1
// @author      -
// @license     GPLv3
// @description adds a link that triggers buy for $0; set format to FLAC and click download.
// ==/UserScript==

(function() {
  'use strict';
  const emailaddress = '';  // put your email here

  function $(s) {
    return document.querySelector(s);
  }

  // release page -------------------------------------
  function startFreeDownload() {
    $('button.buy-link').click();

    setTimeout(function() {
      var elm = $('#userPrice');
      elm.value='0';
      var event = new UIEvent("change", {
        "view": window,
        "bubbles": true,
        "cancelable": true
        });
      elm.dispatchEvent(event);
      }, 300);

    setTimeout(function() {
     $('.download-panel-free-download-link').click();
    }, 1000);

    setTimeout(function() {
      if ($('#downloadButtons_download').style.display != 'none') {
        console.log('email not required, clicking OK');
        $('#downloadButtons_download button.download-panel-checkout-button').click();
      } else {
        console.log('email required');
        $('#fan_email_postalcode').value = '1';
        $('#fan_email_address').focus();
        if (emailaddress) {
          $('#fan_email_address').value = emailaddress;
          $('#downloadButtons_download button.download-panel-checkout-button').click();
        }
      }
    }, 1500);
  }

  var elm = $('#trackInfoInner');
  if (elm && elm.textContent.includes('name your price') ) {
    $('li.buyItem').insertAdjacentHTML(
      'beforeEnd',
      '<h4><a id="StartFreeDownload">Start free download &gt;&gt;</a></h4>'
     );
    $('#StartFreeDownload').addEventListener('click', startFreeDownload);
  }
  // end release page -------------------------------------


  // download page -------------------------------------
  function downloadWhenReady() {
    var link = $('span.download-title a.item-button');
    if (link && link.style.display != 'none' && link.textContent.includes('Download') ) {
      console.log('clicking download');
      link.click();
    } else {
      console.log('waiting for download');
      setTimeout(downloadWhenReady, 1000);
    }
  }

  elm = $('div.item-format');
  if (elm && !elm.textContent.includes('FLAC') ) {
    setTimeout(function() {
     elm.click();
     $('.formats > li:nth-child(3)').click();
     }, 500);
  }
  if (elm) {
   setTimeout(downloadWhenReady, 2000);
  }
  // end download page -------------------------------------


})();