57 lines
2.3 KiB
TypeScript
57 lines
2.3 KiB
TypeScript
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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 deletePages() {
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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 pageInput = document.getElementById('pages-to-delete').value;
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if (!pageInput) {
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showAlert('Invalid Input', 'Please enter page numbers to delete.');
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return;
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}
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showLoader('Deleting pages...');
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try {
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const totalPages = state.pdfDoc.getPageCount();
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const indicesToDelete = new Set();
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const ranges = pageInput.split(',');
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for (const range of ranges) {
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const trimmedRange = range.trim();
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if (trimmedRange.includes('-')) {
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const [start, end] = trimmedRange.split('-').map(Number);
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if (isNaN(start) || isNaN(end) || start < 1 || end > totalPages || start > end) continue;
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for (let i = start; i <= end; i++) indicesToDelete.add(i - 1);
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} else {
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const pageNum = Number(trimmedRange);
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if (isNaN(pageNum) || pageNum < 1 || pageNum > totalPages) continue;
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indicesToDelete.add(pageNum - 1);
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}
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}
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if (indicesToDelete.size === 0) {
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showAlert('Invalid Input', 'No valid pages selected for deletion.');
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hideLoader();
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return;
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}
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if (indicesToDelete.size >= totalPages) {
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showAlert('Invalid Input', 'You cannot delete all pages.');
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hideLoader();
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return;
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}
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const indicesToKeep = Array.from({ length: totalPages }, (_, i) => i).filter(index => !indicesToDelete.has(index));
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const newPdf = await PDFLibDocument.create();
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const copiedPages = await newPdf.copyPages(state.pdfDoc, indicesToKeep);
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copiedPages.forEach((page: any) => newPdf.addPage(page));
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const newPdfBytes = await newPdf.save();
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downloadFile(new Blob([newPdfBytes], { type: 'application/pdf' }), 'deleted-pages.pdf');
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} catch (e) {
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console.error(e);
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showAlert('Error', 'Could not delete pages.');
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} finally {
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hideLoader();
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}
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}
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