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Renta Papy Image Downloader

Download multiple whole chapters from Renta papy JP

  1. // ==UserScript==
  2. // @name         Renta Papy Image Downloader
  3. // @namespace    http://tampermonkey.net/
  4. // @version      1.0
  5. // @description  Download multiple whole chapters from Renta papy JP
  6. // @source       https://github.com/vsatyamesc/Renta_downloader
  7. // @match        https://https://renta.papy.co.jp/*
  8. // @match        https://dre-viewer.papy.co.jp/*
  9. // @grant        none
  10. // @author       vsatyamesc
  11. // @license      MIT
  12. // ==/UserScript==
  13.  
  14. (function() {
  15.     'use strict';
  16.  
  17.     // Create and style the download button
  18.     const button = document.createElement('button');
  19.     button.textContent = 'Download Images';
  20.     Object.assign(button.style, {
  21.         position: 'fixed',
  22.         left: '20px',
  23.         bottom: '20px',
  24.         zIndex: 9999,
  25.         padding: '8px 16px',
  26.         backgroundColor: '#4CAF50',
  27.         color: 'white',
  28.         border: 'none',
  29.         borderRadius: '4px',
  30.         cursor: 'pointer',
  31.         fontSize: '14px'
  32.     });
  33.  
  34.     // Add hover effect
  35.     button.addEventListener('mouseover', () => {
  36.         button.style.backgroundColor = '#45a049';
  37.     });
  38.     button.addEventListener('mouseout', () => {
  39.         button.style.backgroundColor = '#4CAF50';
  40.     });
  41.  
  42.     // Add button to the page
  43.     document.body.appendChild(button);
  44.  
  45.     let isDownloading = false;
  46.  
  47.     function save_image_to_device_vesc(base64image, index) {
  48.         const a = document.createElement('a');
  49.         a.href = base64image;
  50.         a.download = `image_${index}.png`;
  51.         document.body.appendChild(a);
  52.         a.click();
  53.         document.body.removeChild(a);
  54.     }
  55.  
  56.     function waitForCanvasUpdate(previousData, index, resolve) {
  57.         const canvas = document.querySelector('#center .imgWrap canvas.canvas');
  58.         const currentData = canvas.toDataURL('image/png', 1.0);
  59.         if (currentData !== previousData) {
  60.             resolve(currentData);
  61.         } else {
  62.             setTimeout(() => waitForCanvasUpdate(previousData, index, resolve), 100);
  63.         }
  64.     }
  65.  
  66.     async function downloadImages() {
  67.         if (isDownloading) return;
  68.         isDownloading = true;
  69.         button.textContent = 'Downloading...';
  70.         button.style.backgroundColor = '#808080';
  71.  
  72.         try {
  73.             const image_max_1qa = document.getElementById('scrollBar');
  74.             const start_img_1qa = Number(image_max_1qa.min);
  75.             const end_img_1qa = Number(image_max_1qa.max);
  76.  
  77.             let previousData = '';
  78.             for (let i = start_img_1qa; i <= end_img_1qa; i++) {
  79.                 if (i === start_img_1qa) {
  80.                     const canvas = document.querySelector('#center .imgWrap canvas.canvas');
  81.                     previousData = canvas.toDataURL('image/png', 1.0);
  82.                     save_image_to_device_vesc(previousData, i);
  83.                 } else {
  84.                     jumpPage(i);
  85.                     const updatedImage = await new Promise(resolve =>
  86.                         waitForCanvasUpdate(previousData, i, resolve)
  87.                     );
  88.                     save_image_to_device_vesc(updatedImage, i);
  89.                     previousData = updatedImage;
  90.                 }
  91.             }
  92.         } catch (error) {
  93.             console.error('Error during download:', error);
  94.             alert('Download failed: ' + error.message);
  95.         } finally {
  96.             isDownloading = false;
  97.             button.textContent = 'Download Images';
  98.             button.style.backgroundColor = '#4CAF50';
  99.         }
  100.     }
  101.  
  102.     button.addEventListener('click', downloadImages);
  103. })();