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

packages/signing/node-signpdf/dist/helpers/findByteRange.js

@@ -0,0 +1,41 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _SignPdfError = _interopRequireDefault(require("../SignPdfError"));
+
+var _const = require("./const");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Finds ByteRange information within a given PDF Buffer if one exists
+ *
+ * @param {Buffer} pdf
+ * @returns {Object} {byteRangePlaceholder: String, byteRangeStrings: String[], byteRange: String[]}
+ */
+const findByteRange = pdf => {
+  if (!(pdf instanceof Buffer)) {
+    throw new _SignPdfError.default('PDF expected as Buffer.', _SignPdfError.default.TYPE_INPUT);
+  }
+
+  const byteRangeStrings = pdf.toString().match(/\/ByteRange\s*\[{1}\s*(?:(?:\d*|\/\*{10})\s+){3}(?:\d+|\/\*{10}){1}\s*]{1}/g);
+
+  if (!byteRangeStrings) {
+    throw new _SignPdfError.default('No ByteRangeStrings found within PDF buffer', _SignPdfError.default.TYPE_PARSE);
+  }
+
+  const byteRangePlaceholder = byteRangeStrings.find(s => s.includes(`/${_const.DEFAULT_BYTE_RANGE_PLACEHOLDER}`));
+  const byteRanges = byteRangeStrings.map(brs => brs.match(/[^[\s]*(?:\d|\/\*{10})/g));
+  return {
+    byteRangePlaceholder,
+    byteRangeStrings,
+    byteRanges
+  };
+};
+
+var _default = findByteRange;
+exports.default = _default;