671297320e
- Implement core PDF manipulation tools (split, merge, convert, etc.) - Add state management and UI utilities - Set up build configuration with Vite and TailwindCSS - Include essential dependencies for PDF processing - Add gitignore and basic project configuration files
73 lines
3.0 KiB
TypeScript
73 lines
3.0 KiB
TypeScript
import { showLoader, hideLoader, showAlert } from '../ui.js';
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import { downloadFile, readFileAsArrayBuffer } from '../utils/helpers.js';
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import { state } from '../state.js';
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import PDFDocument from 'pdfkit/js/pdfkit.standalone';
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import blobStream from 'blob-stream';
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import * as pdfjsLib from "pdfjs-dist";
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export async function encrypt() {
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const file = state.files[0];
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const password = (document.getElementById('password-input') as HTMLInputElement).value;
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if (!password.trim()) {
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showAlert('Input Required', 'Please enter a password.');
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return;
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}
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try {
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showLoader('Preparing to process...');
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const pdfData = await readFileAsArrayBuffer(file);
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const pdf = await pdfjsLib.getDocument({ data: pdfData as ArrayBuffer }).promise;
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const numPages = pdf.numPages;
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const pageImages = [];
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for (let i = 1; i <= numPages; i++) {
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document.getElementById('loader-text').textContent = `Processing page ${i} of ${numPages}...`;
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const page = await pdf.getPage(i);
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const viewport = page.getViewport({ scale: 2.0 });
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const canvas = document.createElement('canvas');
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const context = canvas.getContext('2d');
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canvas.height = viewport.height;
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canvas.width = viewport.width;
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await page.render({ canvasContext: context, viewport: viewport, canvas: canvas }).promise;
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pageImages.push({
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data: canvas.toDataURL('image/jpeg', 0.8),
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width: viewport.width,
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height: viewport.height
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});
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}
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document.getElementById('loader-text').textContent = 'Encrypting and building PDF...';
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const doc = new PDFDocument({
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size: [pageImages[0].width, pageImages[0].height],
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pdfVersion: '1.7ext3', // Use 256-bit AES encryption
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userPassword: password,
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ownerPassword: password,
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permissions: {
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printing: 'highResolution',
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modifying: false,
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copying: false,
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annotating: false,
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fillingForms: false,
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contentAccessibility: true,
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documentAssembly: false
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}
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});
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const stream = doc.pipe(blobStream());
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for (let i = 0; i < pageImages.length; i++) {
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if (i > 0) doc.addPage({ size: [pageImages[i].width, pageImages[i].height] });
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doc.image(pageImages[i].data, 0, 0, { width: pageImages[i].width, height: pageImages[i].height });
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}
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doc.end();
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stream.on('finish', function () {
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const blob = stream.toBlob('application/pdf');
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downloadFile(blob, `encrypted-${file.name}`);
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hideLoader();
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showAlert('Success', 'Encryption complete! Your download has started.');
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});
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} catch (error) {
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console.error("Error during PDF encryption:", error);
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hideLoader();
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showAlert('Error', 'An error occurred. The PDF might be corrupted.');
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}
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} |