🚚 ➕ add node-signpdf copy to signing packgage until npm includes fix

packages/signing/node-signpdf/dist/helpers/plainAddPlaceholder/getPageRef.js

@@ -0,0 +1,29 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = getPageRef;
+
+var _getPagesDictionaryRef = _interopRequireDefault(require("./getPagesDictionaryRef"));
+
+var _findObject = _interopRequireDefault(require("./findObject"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Finds the reference to a page.
+ *
+ * @param {Buffer} pdfBuffer
+ * @param {Object} info As extracted from readRef()
+ */
+function getPageRef(pdfBuffer, info) {
+  const pagesRef = (0, _getPagesDictionaryRef.default)(info);
+  const pagesDictionary = (0, _findObject.default)(pdfBuffer, info.xref, pagesRef);
+  const kidsPosition = pagesDictionary.indexOf('/Kids');
+  const kidsStart = pagesDictionary.indexOf('[', kidsPosition) + 1;
+  const kidsEnd = pagesDictionary.indexOf(']', kidsPosition);
+  const pages = pagesDictionary.slice(kidsStart, kidsEnd).toString();
+  const split = pages.trim().split(' ', 3);
+  return `${split[0]} ${split[1]} ${split[2]}`;
+}