JWT Autorization / Logging in and registering

node_modules/validator/es/lib/isCreditCard.js

@@ -0,0 +1,40 @@
+import assertString from './util/assertString';
+/* eslint-disable max-len */
+
+var creditCard = /^(?:4[0-9]{12}(?:[0-9]{3,6})?|5[1-5][0-9]{14}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}|6(?:011|5[0-9][0-9])[0-9]{12,15}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11}|6[27][0-9]{14})$/;
+/* eslint-enable max-len */
+
+export default function isCreditCard(str) {
+  assertString(str);
+  var sanitized = str.replace(/[- ]+/g, '');
+
+  if (!creditCard.test(sanitized)) {
+    return false;
+  }
+
+  var sum = 0;
+  var digit;
+  var tmpNum;
+  var shouldDouble;
+
+  for (var i = sanitized.length - 1; i >= 0; i--) {
+    digit = sanitized.substring(i, i + 1);
+    tmpNum = parseInt(digit, 10);
+
+    if (shouldDouble) {
+      tmpNum *= 2;
+
+      if (tmpNum >= 10) {
+        sum += tmpNum % 10 + 1;
+      } else {
+        sum += tmpNum;
+      }
+    } else {
+      sum += tmpNum;
+    }
+
+    shouldDouble = !shouldDouble;
+  }
+
+  return !!(sum % 10 === 0 ? sanitized : false);
+}