mirror of
https://github.com/Frooodle/Stirling-PDF.git
synced 2025-01-10 00:06:51 +01:00
68 lines
2.5 KiB
TypeScript
68 lines
2.5 KiB
TypeScript
|
|
import { PDFDocument, ParseSpeeds } from 'pdf-lib';
|
|
|
|
|
|
export type Metadata = {
|
|
deleteAll?: boolean, // Delete all metadata if set to true
|
|
author?: string, // The author of the document
|
|
creationDate?: Date, // The creation date of the document (format: yyyy/MM/dd HH:mm:ss)
|
|
creator?: string, // The creator of the document
|
|
keywords?: string, // The keywords for the document
|
|
modificationDate?: Date, // The modification date of the document (format: yyyy/MM/dd HH:mm:ss)
|
|
producer?: string, // The producer of the document
|
|
subject?: string, // The subject of the document
|
|
title?: string, // The title of the document
|
|
//trapped?: string, // The trapped status of the document
|
|
//allRequestParams?: object, // Map list of key and value of custom parameters. Note these must start with customKey and customValue if they are non-standard
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {Uint16Array} snapshot
|
|
* @param {Metadata} metadata - Set property to null or "" to clear, undefined properties will be skipped.
|
|
* @returns Promise<Uint8Array>
|
|
*/
|
|
export async function updateMetadata(snapshot: string | Uint8Array | ArrayBuffer, metadata: Metadata): Promise<Uint8Array> {
|
|
// Load the original PDF file
|
|
const pdfDoc = await PDFDocument.load(snapshot, {
|
|
parseSpeed: ParseSpeeds.Slow,
|
|
updateMetadata: false,
|
|
});
|
|
|
|
if (!metadata || metadata.deleteAll) {
|
|
pdfDoc.setAuthor("");
|
|
pdfDoc.setCreationDate(new Date(0))
|
|
pdfDoc.setCreator("")
|
|
pdfDoc.setKeywords([])
|
|
pdfDoc.setModificationDate(new Date(0))
|
|
pdfDoc.setProducer("")
|
|
pdfDoc.setSubject("")
|
|
pdfDoc.setTitle("")
|
|
}
|
|
if (!metadata) {
|
|
return pdfDoc.save();
|
|
}
|
|
|
|
if(metadata.author)
|
|
pdfDoc.setAuthor(metadata.author);
|
|
if(metadata.creationDate)
|
|
pdfDoc.setCreationDate(metadata.creationDate)
|
|
if(metadata.creator)
|
|
pdfDoc.setCreator(metadata.creator)
|
|
if(metadata.keywords)
|
|
pdfDoc.setKeywords(metadata.keywords.split(","))
|
|
if(metadata.modificationDate)
|
|
pdfDoc.setModificationDate(metadata.modificationDate)
|
|
if(metadata.producer)
|
|
pdfDoc.setProducer(metadata.producer)
|
|
if(metadata.subject)
|
|
pdfDoc.setSubject(metadata.subject)
|
|
if(metadata.title)
|
|
pdfDoc.setTitle(metadata.title)
|
|
|
|
// TODO add trapped and custom metadata. May need another library
|
|
|
|
// Serialize the modified document
|
|
return pdfDoc.save();
|
|
};
|