feat: Add JPG to PDF conversion tool with dedicated page and logic.
This commit is contained in:
abdullahalam123
248
src/js/logic/jpg-to-pdf-page.ts
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248
src/js/logic/jpg-to-pdf-page.ts
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import { createIcons, icons } from 'lucide';
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import { showAlert, showLoader, hideLoader } from '../ui.js';
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import { downloadFile, readFileAsArrayBuffer, formatBytes } from '../utils/helpers.js';
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import { PDFDocument as PDFLibDocument } from 'pdf-lib';
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let files: File[] = [];
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', initializePage);
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} else {
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initializePage();
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}
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function initializePage() {
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createIcons({ icons });
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const fileInput = document.getElementById('file-input') as HTMLInputElement;
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const dropZone = document.getElementById('drop-zone');
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const addMoreBtn = document.getElementById('add-more-btn');
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const clearFilesBtn = document.getElementById('clear-files-btn');
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const processBtn = document.getElementById('process-btn');
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if (fileInput) {
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fileInput.addEventListener('change', handleFileUpload);
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}
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if (dropZone) {
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dropZone.addEventListener('dragover', (e) => {
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e.preventDefault();
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dropZone.classList.add('bg-gray-700');
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});
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dropZone.addEventListener('dragleave', () => {
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dropZone.classList.remove('bg-gray-700');
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});
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dropZone.addEventListener('drop', (e) => {
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e.preventDefault();
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dropZone.classList.remove('bg-gray-700');
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const droppedFiles = e.dataTransfer?.files;
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if (droppedFiles && droppedFiles.length > 0) {
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handleFiles(droppedFiles);
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}
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});
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dropZone.addEventListener('click', () => {
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fileInput?.click();
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});
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}
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if (addMoreBtn) {
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addMoreBtn.addEventListener('click', () => {
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fileInput?.click();
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});
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}
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if (clearFilesBtn) {
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clearFilesBtn.addEventListener('click', () => {
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files = [];
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updateUI();
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});
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}
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if (processBtn) {
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processBtn.addEventListener('click', convertToPdf);
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}
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document.getElementById('back-to-tools')?.addEventListener('click', () => {
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window.location.href = '/';
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});
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}
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function handleFileUpload(e: Event) {
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const input = e.target as HTMLInputElement;
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if (input.files && input.files.length > 0) {
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handleFiles(input.files);
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}
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input.value = '';
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}
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function handleFiles(newFiles: FileList) {
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const validFiles = Array.from(newFiles).filter(file =>
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file.type === 'image/jpeg' || file.type === 'image/jpg' || file.name.toLowerCase().endsWith('.jpg') || file.name.toLowerCase().endsWith('.jpeg')
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);
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if (validFiles.length < newFiles.length) {
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showAlert('Invalid Files', 'Some files were skipped. Only JPG/JPEG images are allowed.');
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}
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if (validFiles.length > 0) {
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files = [...files, ...validFiles];
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updateUI();
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}
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}
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const resetState = () => {
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files = [];
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updateUI();
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};
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function updateUI() {
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const fileDisplayArea = document.getElementById('file-display-area');
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const fileControls = document.getElementById('file-controls');
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const optionsDiv = document.getElementById('jpg-to-pdf-options');
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if (!fileDisplayArea || !fileControls || !optionsDiv) return;
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fileDisplayArea.innerHTML = '';
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if (files.length > 0) {
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fileControls.classList.remove('hidden');
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optionsDiv.classList.remove('hidden');
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files.forEach((file, index) => {
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const fileDiv = document.createElement('div');
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fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
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const infoContainer = document.createElement('div');
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infoContainer.className = 'flex items-center gap-2 overflow-hidden';
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const nameSpan = document.createElement('span');
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nameSpan.className = 'truncate font-medium text-gray-200';
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nameSpan.textContent = file.name;
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const sizeSpan = document.createElement('span');
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sizeSpan.className = 'flex-shrink-0 text-gray-400 text-xs';
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sizeSpan.textContent = `(${formatBytes(file.size)})`;
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infoContainer.append(nameSpan, sizeSpan);
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const removeBtn = document.createElement('button');
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removeBtn.className = 'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
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removeBtn.innerHTML = '<i data-lucide="trash-2" class="w-4 h-4"></i>';
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removeBtn.onclick = () => {
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files = files.filter((_, i) => i !== index);
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updateUI();
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};
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fileDiv.append(infoContainer, removeBtn);
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fileDisplayArea.appendChild(fileDiv);
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});
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createIcons({ icons });
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} else {
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fileControls.classList.add('hidden');
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optionsDiv.classList.add('hidden');
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}
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}
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function sanitizeImageAsJpeg(imageBytes: any) {
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return new Promise((resolve, reject) => {
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const blob = new Blob([imageBytes]);
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const imageUrl = URL.createObjectURL(blob);
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const img = new Image();
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img.onload = () => {
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const canvas = document.createElement('canvas');
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canvas.width = img.naturalWidth;
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canvas.height = img.naturalHeight;
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const ctx = canvas.getContext('2d');
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ctx.drawImage(img, 0, 0);
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canvas.toBlob(
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async (jpegBlob) => {
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if (!jpegBlob) {
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return reject(new Error('Canvas toBlob conversion failed.'));
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}
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const arrayBuffer = await jpegBlob.arrayBuffer();
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resolve(new Uint8Array(arrayBuffer));
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},
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'image/jpeg',
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0.9
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);
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URL.revokeObjectURL(imageUrl);
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};
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img.onerror = () => {
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URL.revokeObjectURL(imageUrl);
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reject(
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new Error(
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'The provided file could not be loaded as an image. It may be corrupted.'
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)
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);
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};
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img.src = imageUrl;
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});
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}
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async function convertToPdf() {
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if (files.length === 0) {
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showAlert('No Files', 'Please select at least one JPG file.');
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return;
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}
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showLoader('Creating PDF from JPGs...');
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try {
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const pdfDoc = await PDFLibDocument.create();
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for (const file of files) {
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const originalBytes = await readFileAsArrayBuffer(file);
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let jpgImage;
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try {
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jpgImage = await pdfDoc.embedJpg(originalBytes as Uint8Array);
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} catch (e) {
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showAlert(
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'Warning',
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`Direct JPG embedding failed for ${file.name}, attempting to sanitize...`
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);
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try {
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const sanitizedBytes = await sanitizeImageAsJpeg(originalBytes);
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jpgImage = await pdfDoc.embedJpg(sanitizedBytes as Uint8Array);
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} catch (fallbackError) {
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console.error(
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`Failed to process ${file.name} after sanitization:`,
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fallbackError
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);
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throw new Error(
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`Could not process "${file.name}". The file may be corrupted.`
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);
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}
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}
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const page = pdfDoc.addPage([jpgImage.width, jpgImage.height]);
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page.drawImage(jpgImage, {
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x: 0,
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y: 0,
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width: jpgImage.width,
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height: jpgImage.height,
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});
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}
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const pdfBytes = await pdfDoc.save();
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downloadFile(
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new Blob([new Uint8Array(pdfBytes)], { type: 'application/pdf' }),
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'from_jpgs.pdf'
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);
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showAlert('Success', 'PDF created successfully!', 'success', () => {
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resetState();
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});
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} catch (e: any) {
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console.error(e);
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showAlert('Conversion Error', e.message);
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} finally {
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hideLoader();
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}
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}
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