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52 lines
1.9 KiB
JavaScript
52 lines
1.9 KiB
JavaScript
/**
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* @typedef {Object} Metadata
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* @property {string | null | undefined} Title - The title of the document.
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* @property {string | null | undefined} Author - The author of the document.
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* @property {string | null | undefined} Subject - The subject of the document.
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* @property {string[] | null | undefined} Keywords - An array of keywords associated with the document.
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* @property {string | null | undefined} Producer - The producer of the document.
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* @property {string | null | undefined} Creator - The creator of the document.
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* @property {Date | null | undefined} CreationDate - The date when the document was created.
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* @property {Date | null | undefined} ModificationDate - 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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* @param {import('pdf-lib')} PDFLib
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* @returns
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*/
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export async function editMetadata(snapshot, metadata, PDFLib) {
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// Load the original PDF file
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const pdfDoc = await PDFLib.PDFDocument.load(snapshot, {
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parseSpeed: PDFLib.ParseSpeeds.Fastest,
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});
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if(metadata.Title !== undefined)
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pdfDoc.setTitle(metadata.Title);
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if(metadata.Author !== undefined)
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pdfDoc.setAuthor(metadata.Author)
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if(metadata.Subject !== undefined)
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pdfDoc.setSubject(metadata.Subject)
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if(metadata.Keywords !== undefined)
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pdfDoc.setKeywords(metadata.Keywords)
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if(metadata.Producer !== undefined)
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pdfDoc.setProducer(metadata.Producer)
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if(metadata.Creator !== undefined)
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pdfDoc.setCreator(metadata.Creator)
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if(metadata.CreationDate !== undefined)
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pdfDoc.setCreationDate(metadata.CreationDate)
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if(metadata.ModificationDate !== undefined)
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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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}; |