88e05e6713
Implement new functionality to allow embedding attachments into PDF documents. The feature includes: - UI for selecting PDF and files to attach - Logic to embed files while preserving metadata - Display of attached files with size information - Download of modified PDF with embedded files
77 lines
2.6 KiB
TypeScript
77 lines
2.6 KiB
TypeScript
import { showLoader, hideLoader, showAlert } from '../ui.js';
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import { downloadFile } from '../utils/helpers.js';
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import { state } from '../state.js';
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import { PDFDocument as PDFLibDocument } from 'pdf-lib';
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export async function addBlankPage() {
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// @ts-expect-error TS(2339) FIXME: Property 'value' does not exist on type 'HTMLEleme... Remove this comment to see the full error message
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const pageNumberInput = document.getElementById('page-number').value;
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// @ts-expect-error TS(2339) FIXME: Property 'value' does not exist on type 'HTMLEleme... Remove this comment to see the full error message
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const pageCountInput = document.getElementById('page-count').value;
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if (pageNumberInput.trim() === '') {
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showAlert('Invalid Input', 'Please enter a page number.');
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return;
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}
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if (pageCountInput.trim() === '') {
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showAlert('Invalid Input', 'Please enter the number of pages to insert.');
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return;
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}
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const position = parseInt(pageNumberInput);
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const pageCount = parseInt(pageCountInput);
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const totalPages = state.pdfDoc.getPageCount();
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if (isNaN(position) || position < 0 || position > totalPages) {
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showAlert(
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'Invalid Input',
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`Please enter a number between 0 and ${totalPages}.`
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);
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return;
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}
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if (isNaN(pageCount) || pageCount < 1) {
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showAlert(
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'Invalid Input',
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'Please enter a valid number of pages (1 or more).'
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);
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return;
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}
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showLoader(`Adding ${pageCount} blank page${pageCount > 1 ? 's' : ''}...`);
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try {
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const newPdf = await PDFLibDocument.create();
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const { width, height } = state.pdfDoc.getPage(0).getSize();
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const allIndices = Array.from({ length: totalPages }, (_, i) => i);
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const indicesBefore = allIndices.slice(0, position);
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const indicesAfter = allIndices.slice(position);
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if (indicesBefore.length > 0) {
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const copied = await newPdf.copyPages(state.pdfDoc, indicesBefore);
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copied.forEach((p: any) => newPdf.addPage(p));
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}
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// Add the specified number of blank pages
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for (let i = 0; i < pageCount; i++) {
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newPdf.addPage([width, height]);
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}
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if (indicesAfter.length > 0) {
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const copied = await newPdf.copyPages(state.pdfDoc, indicesAfter);
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copied.forEach((p: any) => newPdf.addPage(p));
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}
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const newPdfBytes = await newPdf.save();
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downloadFile(
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new Blob([new Uint8Array(newPdfBytes)], { type: 'application/pdf' }),
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`blank-page${pageCount > 1 ? 's' : ''}-added.pdf`
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);
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} catch (e) {
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console.error(e);
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showAlert('Error', `Could not add blank page${pageCount > 1 ? 's' : ''}.`);
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} finally {
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hideLoader();
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}
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}
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