feat(json): add RegExp handling in replacer and reviver

Author: StephanGerbeth

packages/operators/src/json.test.js

@@ -41,18 +41,21 @@ describe('log', () => {
       bigInt: BigInt(123),
       date: new Date(),
       url: new URL('https://example.com'),
+      regexp: /\w/g,
       image: readFile('./packages/operators/fixtures/images/test_image.jpg'),
       array: [
         Promise.resolve('hello world'),
         BigInt(123),
         new Date(),
-        new URL('https://example.com')
+        new URL('https://example.com'),
+        /\w/g
       ],
       nested: Promise.resolve({
         text: Promise.resolve('hello world'),
         bigInt: BigInt(123),
         date: new Date(),
         url: new URL('https://example.com'),
+        regexp: Promise.resolve(new RegExp('\\w', 'g')),
         image: from(readFile('./packages/operators/fixtures/images/test_image.jpg'))
       })
     });

packages/operators/src/json/replacer.js

@@ -8,6 +8,7 @@ export const syncReplacer = [
   { validator: value => isURL(value), handler: value => value.toString() },
   { validator: value => isDate(value), handler: value => value.toISOString() },
   { validator: value => isBigInt(value), handler: value => `${value.toString()}n` },
+  { validator: value => isRegExp(value), handler: value => value.toString() },
   { validator: () => true, handler: value => value }
 ];
 
@@ -17,3 +18,4 @@ export const createAsyncReplacer = (transforms = []) => [...transforms, ...async
 const isURL = value => value?.constructor === URL;
 const isDate = value => value?.constructor === Date;
 const isBigInt = value => value?.constructor === BigInt;
+const isRegExp = value => value?.constructor === RegExp;

packages/operators/src/json/reviver.js

@@ -8,6 +8,7 @@ export const syncReviver = [
   { validator: value => isValidUrl(value), handler: value => new URL(value) },
   { validator: value => isValidISODateString(value), handler: value => new Date(value) },
   { validator: value => isBigInt(value), handler: value => BigInt(value.slice(0, -1)) },
+  { validator: value => isRegExp(value), handler: value => regExpFromString(value) },
   { validator: () => true, handler: value => value }
 ];
 
@@ -18,12 +19,25 @@ const isValidUrl = value => {
   return URL.canParse(value) && /^[\w]+:\/\/\S+$/gm.test(value);
 };
 
-function isValidISODateString(value) {
+const isValidISODateString = value => {
   if (!/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z/.test(value)) return false;
   const d = new Date(value);
   return d instanceof Date && !isNaN(d.getTime()) && d.toISOString() === value; // valid date
-}
+};
 
-function isBigInt(value) {
+const isBigInt = value => {
   return value?.constructor === String && /^\d+n$/.test(value);
-}
+};
+
+const isRegExp = value => value?.constructor === String && /^\/.*\/[gimuy]*$/.test(value);
+
+const regExpFromString = q => {
+  const match = q.match(/^\/(.*)\/([gimuy]*)$/);
+  if (!match) return null;
+  const [, pattern, flags] = match;
+  try {
+    return new RegExp(pattern, flags);
+  } catch {
+    return null;
+  }
+};