🚧 📑 pdf helpers, todos for signign

packages/pdf/insertTextInPDF.ts

@@ -0,0 +1,27 @@
+import { degrees, PDFDocument, rgb, StandardFonts } from "pdf-lib";
+
+export async function insertTextInPDF(
+  pdfAsBase64: string,
+  text: string,
+  positionX: number,
+  positionY: number,
+  page: number = 0
+): Promise<string> {
+  const existingPdfBytes = pdfAsBase64;
+
+  const pdfDoc = await PDFDocument.load(existingPdfBytes);
+  const helveticaFont = await pdfDoc.embedFont(StandardFonts.Helvetica);
+
+  const pages = pdfDoc.getPages();
+  const firstPage = pages[page];
+  firstPage.drawText(text, {
+    x: positionX,
+    y: positionY,
+    size: 25,
+    font: helveticaFont,
+    color: rgb(0, 0, 0),
+  });
+
+  const pdfAsUint8Array = await pdfDoc.save();
+  return Buffer.from(pdfAsUint8Array).toString("base64");
+}