Renamed editMetadata to match V1 naming. Added Operations controller

shared-operations/functions/updateMetadata.ts

@@ -0,0 +1,53 @@
+
+import { PDFDocument, ParseSpeeds } from 'pdf-lib';
+
+
+export type Metadata = {
+    Title?: string;       // The title of the document.
+    Author?: string;      // The author of the document.
+    Subject?: string;     // The subject of the document.
+    Keywords?: string[];  // An array of keywords associated with the document.
+    Producer?: string;    // The producer of the document.
+    Creator?: string;     // The creator of the document.
+    CreationDate?: Date;  // The date when the document was created.
+    ModificationDate?: Date; // 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 updateMetadata(snapshot: string | Uint8Array | ArrayBuffer, metadata: Metadata): Promise<Uint8Array> {
+    // Load the original PDF file
+    const pdfDoc = await PDFDocument.load(snapshot, {
+        parseSpeed: ParseSpeeds.Fastest,
+    });
+
+    if(metadata.Title)
+        pdfDoc.setTitle(metadata.Title);
+
+    if(metadata.Author)
+        pdfDoc.setAuthor(metadata.Author)
+
+    if(metadata.Subject)
+        pdfDoc.setSubject(metadata.Subject)
+    
+    if(metadata.Keywords)
+        pdfDoc.setKeywords(metadata.Keywords)
+    
+    if(metadata.Producer)
+        pdfDoc.setProducer(metadata.Producer)
+
+    if(metadata.Creator)
+        pdfDoc.setCreator(metadata.Creator)
+
+    if(metadata.CreationDate)
+        pdfDoc.setCreationDate(metadata.CreationDate)
+
+    if(metadata.ModificationDate)
+        pdfDoc.setModificationDate(metadata.ModificationDate)
+
+    // Serialize the modified document
+    return pdfDoc.save();
+};