Current Dev State

static/js/ketcher2/node_modules/validator/lib/isISIN.js

@@ -0,0 +1,48 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isISIN;
+
+var _assertString = require('./util/assertString');
+
+var _assertString2 = _interopRequireDefault(_assertString);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+var isin = /^[A-Z]{2}[0-9A-Z]{9}[0-9]$/;
+
+function isISIN(str) {
+  (0, _assertString2.default)(str);
+  if (!isin.test(str)) {
+    return false;
+  }
+
+  var checksumStr = str.replace(/[A-Z]/g, function (character) {
+    return parseInt(character, 36);
+  });
+
+  var sum = 0;
+  var digit = void 0;
+  var tmpNum = void 0;
+  var shouldDouble = true;
+  for (var i = checksumStr.length - 2; i >= 0; i--) {
+    digit = checksumStr.substring(i, i + 1);
+    tmpNum = parseInt(digit, 10);
+    if (shouldDouble) {
+      tmpNum *= 2;
+      if (tmpNum >= 10) {
+        sum += tmpNum + 1;
+      } else {
+        sum += tmpNum;
+      }
+    } else {
+      sum += tmpNum;
+    }
+    shouldDouble = !shouldDouble;
+  }
+
+  return parseInt(str.substr(str.length - 1), 10) === (10000 - sum) % 10;
+}
+module.exports = exports['default'];