Add uuid format handler

Author: jdesrosiers

formats/formats-test-suite.spec.ts

@@ -94,11 +94,7 @@ const skip = new Set<string>([
   "|draft2020-12|uri-template.json",
   "|draft2019-09|uri-template.json",
   "|draft7|uri-template.json",
-  "|draft6|uri-template.json",
-
-  // Not supported
-  "|draft2020-12|uuid.json",
-  "|draft2019-09|uuid.json"
+  "|draft6|uri-template.json"
 ]);
 
 const shouldSkip = (path: string[]): boolean => {

formats/handlers/uuid.js

@@ -0,0 +1,17 @@
+const hexDigit = `[0-9a-fA-F]`;
+const hexOctet = `(?:${hexDigit}{2})`;
+const timeLow = `${hexOctet}{4}`;
+const timeMid = `${hexOctet}{2}`;
+const timeHighAndVersion = `${hexOctet}{2}`;
+const clockSeqAndReserved = hexOctet;
+const clockSeqLow = hexOctet;
+const node = `${hexOctet}{6}`;
+
+const uuid = `${timeLow}\\-${timeMid}\\-${timeHighAndVersion}\\-${clockSeqAndReserved}${clockSeqLow}\\-${node}`;
+
+export const isUuid = RegExp.prototype.test.bind(new RegExp(`^${uuid}$`));
+
+export default {
+  id: "https://json-schema.org/format/uuid",
+  handler: (uuid) => typeof uuid !== "string" || isUuid(uuid)
+};

formats/index.js

@@ -10,6 +10,7 @@ import uri from "./handlers/uri.js";
 import uriReference from "./handlers/uri-reference.js";
 import iri from "./handlers/iri.js";
 import iriReference from "./handlers/iri-reference.js";
+import uuid from "./handlers/uuid.js";
 
 
 addFormat(dateTime);
@@ -22,6 +23,7 @@ addFormat(uri);
 addFormat(uriReference);
 addFormat(iri);
 addFormat(iriReference);
+addFormat(uuid);
 
 export {
   getShouldValidateFormat,