106 lines
2.8 KiB
TypeScript
106 lines
2.8 KiB
TypeScript
import { showLoader, hideLoader, showAlert } from '../ui.js';
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import {
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downloadFile,
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initializeQpdf,
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readFileAsArrayBuffer,
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} from '../utils/helpers.js';
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import { state } from '../state.js';
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export async function decrypt() {
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const file = state.files[0];
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const password = (
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document.getElementById('password-input') as HTMLInputElement
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)?.value;
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if (!password) {
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showAlert('Input Required', 'Please enter the PDF password.');
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return;
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}
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const inputPath = '/input.pdf';
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const outputPath = '/output.pdf';
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let qpdf: any;
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try {
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showLoader('Initializing decryption...');
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qpdf = await initializeQpdf();
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showLoader('Reading encrypted PDF...');
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const fileBuffer = await readFileAsArrayBuffer(file);
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const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer);
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qpdf.FS.writeFile(inputPath, uint8Array);
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showLoader('Decrypting PDF...');
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const args = [inputPath, '--password=' + password, '--decrypt', outputPath];
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try {
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qpdf.callMain(args);
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} catch (qpdfError: any) {
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console.error('qpdf execution error:', qpdfError);
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if (
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qpdfError.message?.includes('invalid password') ||
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qpdfError.message?.includes('password')
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) {
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throw new Error('INVALID_PASSWORD');
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}
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throw qpdfError;
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}
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showLoader('Preparing download...');
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const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
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if (outputFile.length === 0) {
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throw new Error('Decryption resulted in an empty file.');
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}
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const blob = new Blob([outputFile], { type: 'application/pdf' });
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downloadFile(blob, `unlocked-${file.name}`);
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hideLoader();
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showAlert(
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'Success',
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'PDF decrypted successfully! Your download has started.'
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);
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} catch (error: any) {
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console.error('Error during PDF decryption:', error);
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hideLoader();
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if (error.message === 'INVALID_PASSWORD') {
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showAlert(
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'Incorrect Password',
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'The password you entered is incorrect. Please try again.'
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);
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} else if (error.message?.includes('password')) {
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showAlert(
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'Password Error',
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'Unable to decrypt the PDF with the provided password.'
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);
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} else {
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showAlert(
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'Decryption Failed',
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`An error occurred: ${error.message || 'The password you entered is wrong or the file is corrupted.'}`
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);
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}
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} finally {
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try {
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if (qpdf?.FS) {
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try {
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qpdf.FS.unlink(inputPath);
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} catch (e) {
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console.warn('Failed to unlink input file:', e);
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}
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try {
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qpdf.FS.unlink(outputPath);
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} catch (e) {
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console.warn('Failed to unlink output file:', e);
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}
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}
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} catch (cleanupError) {
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console.warn('Failed to cleanup WASM FS:', cleanupError);
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}
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}
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}
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