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// State variables let selectedFile = null; let pdfDocument = null; let extractedText = ''; let convertedDoc = null;

// Event Listeners browseBtn.addEventListener('click', () => fileInput.click());

fileInput.addEventListener('change', (e) => { if (e.target.files.length > 0) { handleFileSelection(e.target.files[0]); } });

// Drag and drop functionality dropZone.addEventListener('dragover', (e) => { e.preventDefault(); dropZone.classList.add('dragover'); });

dropZone.addEventListener('dragleave', () => { dropZone.classList.remove('dragover'); });

dropZone.addEventListener('drop', (e) => { e.preventDefault(); dropZone.classList.remove('dragover');

if (e.dataTransfer.files.length > 0) { handleFileSelection(e.dataTransfer.files[0]); } });

// Convert button click convertBtn.addEventListener('click', convertFile);

// Download button click downloadBtn.addEventListener('click', downloadDocument);

// Convert another file convertAnother.addEventListener('click', resetConverter);

// Close preview closePreview.addEventListener('click', () => { previewArea.classList.remove('active'); });

// Handle file selection function handleFileSelection(file) { // Validate file type if (!file.type.includes('pdf') && !file.name.toLowerCase().endsWith('.pdf')) { showError('Please select a valid PDF file.'); return; }

// Validate file size (max 10MB) if (file.size > 10 * 1024 * 1024) { showError('File size exceeds 10MB limit. Please select a smaller file.'); return; }

// Hide any previous error hideError();

// Store file and update UI selectedFile = file;

// Update file info display fileName.textContent = file.name; fileSize.textContent = formatFileSize(file.size); fileInfo.classList.add('active');

// Enable convert button convertBtn.disabled = false; }

// Convert file function async function convertFile() { if (!selectedFile) { showError('Please select a PDF file first.'); return; }

try { // Show loading state loading.classList.add('active'); conversionProgress.classList.add('active'); loadingText.textContent = 'Loading PDF document...'; convertBtn.disabled = true;

// Update progress updateProgress(10);

// Load the PDF file const arrayBuffer = await selectedFile.arrayBuffer();

// Initialize PDF.js pdfjsLib.GlobalWorkerOptions.workerSrc = `https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js`;

// Load the PDF document loadingText.textContent = 'Parsing PDF document...'; updateProgress(20);

pdfDocument = await pdfjsLib.getDocument({ data: arrayBuffer }).promise; const numPages = pdfDocument.numPages;

// Extract text from each page loadingText.textContent = `Extracting text from ${numPages} pages...`; updateProgress(30);

extractedText = ''; let extractedPages = 0;

for (let pageNum = 1; pageNum item.str) .join(' ');

extractedText += pageText;

// Add page break if not last page if (pageNum p.trim().length > 0);

// Create document paragraphs const docParagraphs = [];

// Add title const title = originalFileName.replace('.pdf', '').replace('.PDF', ''); docParagraphs.push( new Paragraph({ text: title, heading: HeadingLevel.HEADING_1, alignment: AlignmentType.CENTER, spacing: { after: 400 } }) );

// Process each paragraph paragraphs.forEach(paragraph => { // Check if this is a page separator if (paragraph.includes('--- Page')) { if (includePageNumbers) { const pageNum = paragraph.match(/Page (\d+)/)[1]; docParagraphs.push( new Paragraph({ text: `Page ${pageNum}`, heading: HeadingLevel.HEADING_3, alignment: AlignmentType.CENTER, spacing: { before: 300, after: 200 } }) ); } } else { // Regular paragraph docParagraphs.push( new Paragraph({ children: [ new TextRun({ text: paragraph, size: fontSize * 2, // Docx uses half-points (24 = 12pt) font: fontFamily }) ], spacing: { after: 200 } }) ); } });

// Create document const doc = new Document({ sections: [{ properties: {}, children: docParagraphs }] });

return doc; }

// Download the converted document async function downloadDocument() { if (!convertedDoc) { showError('No document to download. Please convert a file first.'); return; }

try { const { Packer } = docx;

// Generate blob const blob = await Packer.toBlob(convertedDoc);

// Create download link const fileName = selectedFile.name.replace('.pdf', '').replace('.PDF', '') + '_converted.docx';

// Save file saveAs(blob, fileName);

} catch (error) { console.error('Download error:', error); showError('Failed to generate download. Please try again.'); } }

// Show preview of extracted text function showPreview(text) { // Limit preview to 1000 characters const previewText = text.length > 1000 ? text.substring(0, 1000) + '...' : text;

// Format preview with line breaks const formattedPreview = previewText .replace(/\n/g, '
') .replace(/ /g, '  ');

previewContent.innerHTML = formattedPreview; previewArea.classList.add('active'); }

// Reset converter to initial state function resetConverter() { selectedFile = null; pdfDocument = null; extractedText = ''; convertedDoc = null;

fileInput.value = ''; fileInfo.classList.remove('active'); convertBtn.disabled = true; resultArea.classList.remove('active'); previewArea.classList.remove('active'); conversionProgress.classList.remove('active'); hideError();

// Reset progress bar updateProgress(0);

// Scroll to top document.querySelector('.upload-area').scrollIntoView({ behavior: 'smooth' }); }

// Update progress bar function updateProgress(percentage) { progressFill.style.width = `${percentage}%`; progressText.textContent = `${Math.round(percentage)}%`; }

// Show error message function showError(message) { errorText.textContent = message; errorAlert.style.display = 'block'; errorAlert.classList.remove('success', 'info'); errorAlert.classList.add('error'); }

// Hide error message function hideError() { errorAlert.style.display = 'none'; }

// Format file size function formatFileSize(bytes) { if (bytes === 0) return '0 Bytes';

const k = 1024; const sizes = ['Bytes', 'KB', 'MB', 'GB']; const i = Math.floor(Math.log(bytes) / Math.log(k));

return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i]; }

// Initialize the converter function initConverter() { // Hide error on load hideError();

// Set PDF.js worker if (pdfjsLib) { pdfjsLib.GlobalWorkerOptions.workerSrc = `https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js`; }

console.log('PDF to Word Converter initialized with PDF.js and Docx.js integration.'); }

// Initialize when page loads document.addEventListener('DOMContentLoaded', initConverter);