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ImageDownloaderLib

Image downloader for manga download scripts.

Fra og med 22.09.2022. Se den nyeste version.

Dette script bør ikke installeres direkte. Det er et bibliotek, som andre scripts kan inkludere med metadirektivet // @require https://update.greasyfork.org/scripts/451810/1096733/ImageDownloaderLib.js 

function ImageDownloader({
  getImagePromises,
  isOKToDownload = () => true,
  title = `package_${Date.now()}`,
  zipOptions = {},
  imageSuffix = 'jpg',
  cssVerticalDistance = 'top: 80px',
  cssHorizontalDistance = 'left: 80px'
}) {
  // create download button element
  const dlBtn = document.createElement('button');
  dlBtn.textContent = 'Download';
  dlBtn.style = `
    position: fixed;
    ${cssVerticalDistance};
    ${cssHorizontalDistance};
    z-index: 9999999;

    width: 128px;
    height: 48px;

    display: flex;
    justify-content: center;
    align-items: center;

    font-size: 14px;
    font-family: 'Consolas', 'Monaco', 'Microsoft YaHei';
    color: #fff;

    background-color: #0984e3;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  `;

  // setup click event callback
  dlBtn.onclick = function () {
    if (!isOKToDownload()) return;

    dlBtn.disabled = true;
    dlBtn.textContent = "Processing";
    dlBtn.style.backgroundColor = '#aaa';
    dlBtn.style.cursor = 'not-allowed';
    download(getImagePromises, title, zipOptions);
  }

  // add button to body
  document.body.appendChild(dlBtn);

  // download
  async function download(getImagePromises, title, zipOptions) {
    const images = await Promise.all(getImagePromises());

    // create zip
    const zip = new JSZip(); // JSZip library should be imported already
    const folder = zip.folder(title);
    images.forEach((image, index) => {
      const filename = `${index + 1}`.padStart(images.length >= 100 ? 3 : 2, '0') + `.${imageSuffix}`;
      folder.file(filename, image, zipOptions);
    });

    // pop up download window
    const content = await zip.generateAsync({ type: "blob" });
    saveAs(content, `${title}.zip`); // FileSaver library should be imported already

    // change the text of download button
    dlBtn.innerText = "Completed";
  }
}