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