mirror of
https://github.com/Frooodle/Stirling-PDF.git
synced 2024-12-21 19:08:24 +01:00
55 lines
1.9 KiB
JavaScript
55 lines
1.9 KiB
JavaScript
|
|
import { PDFDocument, ParseSpeeds } from 'pdf-lib';
|
|
|
|
|
|
/**
|
|
* @typedef {Object} Metadata
|
|
* @property {string | null | undefined} Title - The title of the document.
|
|
* @property {string | null | undefined} Author - The author of the document.
|
|
* @property {string | null | undefined} Subject - The subject of the document.
|
|
* @property {string[] | null | undefined} Keywords - An array of keywords associated with the document.
|
|
* @property {string | null | undefined} Producer - The producer of the document.
|
|
* @property {string | null | undefined} Creator - The creator of the document.
|
|
* @property {Date | null | undefined} CreationDate - The date when the document was created.
|
|
* @property {Date | null | undefined} ModificationDate - The date when the document was last modified.
|
|
*/
|
|
|
|
/**
|
|
*
|
|
* @param {Uint16Array} snapshot
|
|
* @param {Metadata} metadata - Set property to null or "" to clear, undefined properties will be skipped.
|
|
* @returns Promise<Uint8Array>
|
|
*/
|
|
export async function editMetadata(snapshot, metadata) {
|
|
// Load the original PDF file
|
|
const pdfDoc = await PDFDocument.load(snapshot, {
|
|
parseSpeed: ParseSpeeds.Fastest,
|
|
});
|
|
|
|
if(metadata.Title !== undefined)
|
|
pdfDoc.setTitle(metadata.Title);
|
|
|
|
if(metadata.Author !== undefined)
|
|
pdfDoc.setAuthor(metadata.Author)
|
|
|
|
if(metadata.Subject !== undefined)
|
|
pdfDoc.setSubject(metadata.Subject)
|
|
|
|
if(metadata.Keywords !== undefined)
|
|
pdfDoc.setKeywords(metadata.Keywords)
|
|
|
|
if(metadata.Producer !== undefined)
|
|
pdfDoc.setProducer(metadata.Producer)
|
|
|
|
if(metadata.Creator !== undefined)
|
|
pdfDoc.setCreator(metadata.Creator)
|
|
|
|
if(metadata.CreationDate !== undefined)
|
|
pdfDoc.setCreationDate(metadata.CreationDate)
|
|
|
|
if(metadata.ModificationDate !== undefined)
|
|
pdfDoc.setModificationDate(metadata.ModificationDate)
|
|
|
|
// Serialize the modified document
|
|
return pdfDoc.save();
|
|
}; |