From 52a1720defe541993e20722225ffb22a3fd0318c Mon Sep 17 00:00:00 2001
From: Zdravko Iliev <zdravko.iliev@vereign.com>
Date: Wed, 2 Mar 2022 12:55:43 +0200
Subject: [PATCH] scale down the qrcode and insert link
---
dist/pdfParser.d.ts | 1 +
dist/pdfParser.js | 35 +++++++++++++++++++-----------
src/pdfParser.ts | 52 +++++++++++++++++++++++++++++++++------------
3 files changed, 62 insertions(+), 26 deletions(-)
diff --git a/dist/pdfParser.d.ts b/dist/pdfParser.d.ts
index adf5929..bac00b0 100644
--- a/dist/pdfParser.d.ts
+++ b/dist/pdfParser.d.ts
@@ -6,5 +6,6 @@ declare class PDFparser {
constructor(document: Buffer);
getPDFMeta: () => Promise<IgetMetaResponse>;
insertQrCode: (imgBytes: ArrayBuffer) => Promise<ArrayBuffer>;
+ private createPageLinkAnnotation;
}
export default PDFparser;
diff --git a/dist/pdfParser.js b/dist/pdfParser.js
index 6a76d7a..4597eec 100644
--- a/dist/pdfParser.js
+++ b/dist/pdfParser.js
@@ -13,6 +13,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
};
Object.defineProperty(exports, "__esModule", { value: true });
const verify_pdf_1 = __importDefault(require("@ninja-labs/verify-pdf"));
+const pdf_lib_1 = require("pdf-lib");
const pdfdataextract_1 = require("pdfdataextract");
const config_1 = require("./config");
const { PDFDocument } = require("pdf-lib");
@@ -48,25 +49,35 @@ class PDFparser {
this.insertQrCode = (imgBytes) => __awaiter(this, void 0, void 0, function* () {
const pdfDoc = yield PDFDocument.load(this.document);
const img = yield pdfDoc.embedPng(imgBytes);
- // const imagePage = pdfDoc.insertPage(0);
+ const scaled = img.scale(0.5);
const pages = pdfDoc.getPages();
const firstPage = pages[0];
- const { width, height } = firstPage.getSize();
firstPage.drawImage(img, {
- x: firstPage.getWidth() / 2 - img.width / 2,
- y: firstPage.getHeight() / 2 - img.height / 2,
- width: img.width,
- height: img.height,
+ x: firstPage.getWidth() / 2 - scaled.width / 2,
+ y: firstPage.getHeight() / 2 - scaled.height / 2,
+ width: scaled.width,
+ height: scaled.height,
});
- // firstPage.drawImage(img, {
- // x: 0,
- // y: 0,
- // width: firstPage.getWidth(),
- // height: firstPage.getHeight(),
- // });
+ const link = this.createPageLinkAnnotation(firstPage, "https://pdf-lib.js.org/", {
+ imgXPos: firstPage.getWidth() / 2 - scaled.width / 2,
+ imgYPos: firstPage.getHeight() / 2 - scaled.height / 2,
+ imgWidth: scaled.width,
+ imagHeight: scaled.height,
+ });
+ firstPage.node.set(pdf_lib_1.PDFName.of("Annots"), pdfDoc.context.obj([link]));
const pdfBytes = yield pdfDoc.save();
return pdfBytes;
});
+ this.createPageLinkAnnotation = (page, uri, { imgXPos, imgYPos, imgWidth, imagHeight }) => page.doc.context.register(page.doc.context.obj({
+ Type: "Annot",
+ Subtype: "Link",
+ Rect: [imgXPos, imgYPos, imgXPos + imgWidth, imgYPos + imagHeight],
+ A: {
+ Type: "Action",
+ S: "URI",
+ URI: pdf_lib_1.PDFString.of(uri),
+ },
+ }));
this.document = document;
this.config = config_1.config;
}
diff --git a/src/pdfParser.ts b/src/pdfParser.ts
index bca3074..c6455e0 100644
--- a/src/pdfParser.ts
+++ b/src/pdfParser.ts
@@ -1,9 +1,9 @@
import verifyPDF from "@ninja-labs/verify-pdf";
+import { PDFName, PDFPage, PDFString } from "pdf-lib";
import { PdfData } from "pdfdataextract";
import { config } from "./config";
import { IgetMetaResponse } from "./types";
const { PDFDocument } = require("pdf-lib");
-
class PDFparser {
readonly document;
readonly config;
@@ -44,31 +44,55 @@ class PDFparser {
insertQrCode = async (imgBytes: ArrayBuffer): Promise<ArrayBuffer> => {
const pdfDoc = await PDFDocument.load(this.document);
const img = await pdfDoc.embedPng(imgBytes);
- // const imagePage = pdfDoc.insertPage(0);
+
+ const scaled = img.scale(0.5);
const pages = pdfDoc.getPages();
- const firstPage = pages[0];
- const { width, height } = firstPage.getSize();
+ const firstPage = pages[0];
firstPage.drawImage(img, {
- x: firstPage.getWidth() / 2 - img.width / 2,
- y: firstPage.getHeight() / 2 - img.height / 2,
- width: img.width,
- height: img.height,
+ x: firstPage.getWidth() / 2 - scaled.width / 2,
+ y: firstPage.getHeight() / 2 - scaled.height / 2,
+ width: scaled.width,
+ height: scaled.height,
});
- // firstPage.drawImage(img, {
- // x: 0,
- // y: 0,
- // width: firstPage.getWidth(),
- // height: firstPage.getHeight(),
- // });
+ const link = this.createPageLinkAnnotation(
+ firstPage,
+ "https://pdf-lib.js.org/",
+ {
+ imgXPos: firstPage.getWidth() / 2 - scaled.width / 2,
+ imgYPos: firstPage.getHeight() / 2 - scaled.height / 2,
+ imgWidth: scaled.width,
+ imagHeight: scaled.height,
+ }
+ );
+
+ firstPage.node.set(PDFName.of("Annots"), pdfDoc.context.obj([link]));
const pdfBytes = await pdfDoc.save();
return pdfBytes;
};
+
+ private createPageLinkAnnotation = (
+ page: PDFPage,
+ uri: string,
+ { imgXPos, imgYPos, imgWidth, imagHeight }
+ ) =>
+ page.doc.context.register(
+ page.doc.context.obj({
+ Type: "Annot",
+ Subtype: "Link",
+ Rect: [imgXPos, imgYPos, imgXPos + imgWidth, imgYPos + imagHeight],
+ A: {
+ Type: "Action",
+ S: "URI",
+ URI: PDFString.of(uri),
+ },
+ })
+ );
}
export default PDFparser;
--
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