Add node modules and compiled JavaScript from main (#54)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/jose/lib/jwt/shared_validations.js

@@ -0,0 +1,45 @@
+const { JWTClaimInvalid } = require('../errors')
+
+const isNotString = val => typeof val !== 'string' || val.length === 0
+const isNotArrayOfStrings = val => !Array.isArray(val) || val.length === 0 || val.some(isNotString)
+const isRequired = (Err, value, label, claim) => {
+  if (value === undefined) {
+    throw new Err(`${label} is missing`, claim, 'missing')
+  }
+}
+const isString = (Err, value, label, claim, required = false) => {
+  if (required) {
+    isRequired(Err, value, label, claim)
+  }
+
+  if (value !== undefined && isNotString(value)) {
+    throw new Err(`${label} must be a string`, claim, 'invalid')
+  }
+}
+const isTimestamp = (value, label, required = false) => {
+  if (required && value === undefined) {
+    throw new JWTClaimInvalid(`"${label}" claim is missing`, label, 'missing')
+  }
+
+  if (value !== undefined && (typeof value !== 'number')) {
+    throw new JWTClaimInvalid(`"${label}" claim must be a JSON numeric value`, label, 'invalid')
+  }
+}
+const isStringOrArrayOfStrings = (value, label, required = false) => {
+  if (required && value === undefined) {
+    throw new JWTClaimInvalid(`"${label}" claim is missing`, label, 'missing')
+  }
+
+  if (value !== undefined && (isNotString(value) && isNotArrayOfStrings(value))) {
+    throw new JWTClaimInvalid(`"${label}" claim must be a string or array of strings`, label, 'invalid')
+  }
+}
+
+module.exports = {
+  isNotArrayOfStrings,
+  isRequired,
+  isNotString,
+  isString,
+  isTimestamp,
+  isStringOrArrayOfStrings
+}