133 lines
8.0 KiB
TypeScript
133 lines
8.0 KiB
TypeScript
import { createIcons, icons } from 'lucide';
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import { showAlert, showLoader, hideLoader } from '../ui.js';
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import { downloadFile, hexToRgb, formatBytes, parsePageRanges } from '../utils/helpers.js';
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import { PDFDocument as PDFLibDocument, rgb, StandardFonts } from 'pdf-lib';
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interface PageState { file: File | null; pdfDoc: PDFLibDocument | null; }
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const pageState: PageState = { file: null, pdfDoc: null };
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', initializePage);
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} else { initializePage(); }
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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 backBtn = document.getElementById('back-to-tools');
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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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fileInput.addEventListener('click', () => { fileInput.value = ''; });
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}
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if (dropZone) {
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dropZone.addEventListener('dragover', (e) => { e.preventDefault(); dropZone.classList.add('border-indigo-500'); });
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dropZone.addEventListener('dragleave', () => { dropZone.classList.remove('border-indigo-500'); });
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dropZone.addEventListener('drop', (e) => {
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e.preventDefault(); dropZone.classList.remove('border-indigo-500');
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if (e.dataTransfer?.files.length) handleFiles(e.dataTransfer.files);
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});
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}
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if (backBtn) backBtn.addEventListener('click', () => { window.location.href = import.meta.env.BASE_URL; });
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if (processBtn) processBtn.addEventListener('click', addHeaderFooter);
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}
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function handleFileUpload(e: Event) { const input = e.target as HTMLInputElement; if (input.files?.length) handleFiles(input.files); }
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async function handleFiles(files: FileList) {
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const file = files[0];
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if (!file || file.type !== 'application/pdf') { showAlert('Invalid File', 'Please upload a valid PDF file.'); return; }
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showLoader('Loading PDF...');
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try {
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const arrayBuffer = await file.arrayBuffer();
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pageState.pdfDoc = await PDFLibDocument.load(arrayBuffer);
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pageState.file = file;
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updateFileDisplay();
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document.getElementById('options-panel')?.classList.remove('hidden');
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const totalPagesSpan = document.getElementById('total-pages');
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if (totalPagesSpan) totalPagesSpan.textContent = String(pageState.pdfDoc.getPageCount());
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} catch (error) { console.error(error); showAlert('Error', 'Failed to load PDF file.'); }
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finally { hideLoader(); }
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}
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function updateFileDisplay() {
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const fileDisplayArea = document.getElementById('file-display-area');
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if (!fileDisplayArea || !pageState.file || !pageState.pdfDoc) return;
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fileDisplayArea.innerHTML = '';
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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';
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const infoContainer = document.createElement('div');
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infoContainer.className = 'flex flex-col flex-1 min-w-0';
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const nameSpan = document.createElement('div');
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nameSpan.className = 'truncate font-medium text-gray-200 text-sm mb-1';
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nameSpan.textContent = pageState.file.name;
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const metaSpan = document.createElement('div');
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metaSpan.className = 'text-xs text-gray-400';
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metaSpan.textContent = `${formatBytes(pageState.file.size)} • ${pageState.pdfDoc.getPageCount()} pages`;
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infoContainer.append(nameSpan, metaSpan);
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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 = resetState;
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fileDiv.append(infoContainer, removeBtn);
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fileDisplayArea.appendChild(fileDiv);
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createIcons({ icons });
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}
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function resetState() {
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pageState.file = null; pageState.pdfDoc = null;
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const fileDisplayArea = document.getElementById('file-display-area');
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if (fileDisplayArea) fileDisplayArea.innerHTML = '';
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document.getElementById('options-panel')?.classList.add('hidden');
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const fileInput = document.getElementById('file-input') as HTMLInputElement;
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if (fileInput) fileInput.value = '';
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}
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async function addHeaderFooter() {
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if (!pageState.pdfDoc) { showAlert('Error', 'Please upload a PDF file first.'); return; }
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showLoader('Adding header & footer...');
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try {
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const helveticaFont = await pageState.pdfDoc.embedFont(StandardFonts.Helvetica);
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const allPages = pageState.pdfDoc.getPages();
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const totalPages = allPages.length;
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const margin = 40;
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const fontSize = parseInt((document.getElementById('font-size') as HTMLInputElement)?.value || '10') || 10;
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const colorHex = (document.getElementById('font-color') as HTMLInputElement)?.value || '#000000';
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const fontColor = hexToRgb(colorHex);
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const pageRangeInput = (document.getElementById('page-range') as HTMLInputElement)?.value || '';
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const texts = {
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headerLeft: (document.getElementById('header-left') as HTMLInputElement)?.value || '',
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headerCenter: (document.getElementById('header-center') as HTMLInputElement)?.value || '',
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headerRight: (document.getElementById('header-right') as HTMLInputElement)?.value || '',
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footerLeft: (document.getElementById('footer-left') as HTMLInputElement)?.value || '',
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footerCenter: (document.getElementById('footer-center') as HTMLInputElement)?.value || '',
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footerRight: (document.getElementById('footer-right') as HTMLInputElement)?.value || '',
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};
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const indicesToProcess = parsePageRanges(pageRangeInput, totalPages);
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if (indicesToProcess.length === 0) throw new Error("Invalid page range specified.");
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const drawOptions = { font: helveticaFont, size: fontSize, color: rgb(fontColor.r, fontColor.g, fontColor.b) };
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for (const pageIndex of indicesToProcess) {
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const page = allPages[pageIndex];
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const { width, height } = page.getSize();
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const pageNumber = pageIndex + 1;
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const processText = (text: string) => text.replace(/{page}/g, String(pageNumber)).replace(/{total}/g, String(totalPages));
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const processed = {
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headerLeft: processText(texts.headerLeft), headerCenter: processText(texts.headerCenter), headerRight: processText(texts.headerRight),
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footerLeft: processText(texts.footerLeft), footerCenter: processText(texts.footerCenter), footerRight: processText(texts.footerRight),
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};
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if (processed.headerLeft) page.drawText(processed.headerLeft, { ...drawOptions, x: margin, y: height - margin });
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if (processed.headerCenter) page.drawText(processed.headerCenter, { ...drawOptions, x: width / 2 - helveticaFont.widthOfTextAtSize(processed.headerCenter, fontSize) / 2, y: height - margin });
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if (processed.headerRight) page.drawText(processed.headerRight, { ...drawOptions, x: width - margin - helveticaFont.widthOfTextAtSize(processed.headerRight, fontSize), y: height - margin });
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if (processed.footerLeft) page.drawText(processed.footerLeft, { ...drawOptions, x: margin, y: margin });
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if (processed.footerCenter) page.drawText(processed.footerCenter, { ...drawOptions, x: width / 2 - helveticaFont.widthOfTextAtSize(processed.footerCenter, fontSize) / 2, y: margin });
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if (processed.footerRight) page.drawText(processed.footerRight, { ...drawOptions, x: width - margin - helveticaFont.widthOfTextAtSize(processed.footerRight, fontSize), y: margin });
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}
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const newPdfBytes = await pageState.pdfDoc.save();
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downloadFile(new Blob([new Uint8Array(newPdfBytes)], { type: 'application/pdf' }), 'header-footer-added.pdf');
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showAlert('Success', 'Header & Footer added successfully!', 'success', () => { resetState(); });
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} catch (e: any) { console.error(e); showAlert('Error', e.message || 'Could not add header or footer.'); }
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finally { hideLoader(); }
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}
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