@bader-nasser/pdftools/dist/utils.js

PDF tools to manipulate and process PDF files

import { open } from 'node:fs/promises';
import fs from 'fs-extra';
import { PDFDocument } from 'pdf-lib';
export function isUndefinedOrEmptyString(value) {
    return value === undefined || value.trim() === '';
}
export function removeExtension(string_, extension = 'pdf') {
    const re = new RegExp(`.${extension}$`);
    return string_.replace(re, '');
}
export function addExtension(string_, extension = 'pdf') {
    return `${string_}.${extension}`;
}
export function pad(number) {
    /* eslint-disable-next-line unicorn/prefer-number-properties */ // @ts-expect-error silence the error!
    if (isNaN(number)) {
        return `${number}`;
    }
    return `${number}`.padStart(4, '0');
}
export async function parseDataFile(dataFile) {
    const parsedData = { shared: [], all: [], error: '' };
    try {
        const file = await open(dataFile);
        for await (const line of file.readLines({ encoding: 'utf8' })) {
            if (line) {
                if (line.startsWith('#') && line.includes('share')) {
                    parsedData.shared = [...parsedData.all];
                }
                else if (!line.startsWith('#')) {
                    const pageRange = line.trim().replaceAll(/[\s-]+/g, '-');
                    parsedData.all.push(pageRange);
                }
            }
        }
    }
    catch (error) {
        // @ts-expect-error silent ts
        parsedData.error = error.message ?? error;
    }
    return parsedData;
}
export async function updateMetadata({ filePath, meta: { title, author, subject, keywords, producer, creator = 'pdftools (https://npmjs.com/package/@bader-nasser/pdftools)', creationDate, modificationDate, }, dryRun, }) {
    if (dryRun) {
        return;
    }
    const existingPdfBytes = await fs.readFile(filePath);
    // Load a PDFDocument without updating its existing metadata
    const pdfDoc = await PDFDocument.load(existingPdfBytes, {
        updateMetadata: false,
    });
    if (title) {
        pdfDoc.setTitle(title);
    }
    if (author) {
        pdfDoc.setAuthor(author);
    }
    if (subject) {
        pdfDoc.setSubject(subject);
    }
    if (keywords) {
        pdfDoc.setKeywords(keywords);
    }
    if (producer) {
        pdfDoc.setProducer(producer);
    }
    if (creator) {
        pdfDoc.setCreator(creator);
    }
    if (creationDate) {
        pdfDoc.setCreationDate(new Date(creationDate));
    }
    if (modificationDate) {
        pdfDoc.setModificationDate(new Date(modificationDate));
    }
    // Serialize the PDFDocument to bytes (a Uint8Array)
    const pdfBytes = await pdfDoc.save();
    await fs.writeFile(filePath, pdfBytes);
}