Serialize and Deserialize helper function

Summary: This diff adds a helper function to serialize and deserialize javascript Objects

Reviewed By: danielbuechele

Differential Revision: D14101483

fbshipit-source-id: 3e1f37076ccc04b83cf7de5f10900e21e6474c1d

src/utils/serialization.js

@@ -0,0 +1,71 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+export function serialize(obj: Object): string {
+  return JSON.stringify(makeObjectSerializable(obj));
+}
+
+export function deserialize(str: string): Object {
+  return deserializeObject(JSON.parse(str));
+}
+
+export function makeObjectSerializable(obj: any): any {
+  if (!(obj instanceof Object)) {
+    return obj;
+  }
+  if (obj instanceof Map) {
+    return {
+      __flipper_object_type__: 'Map',
+      data: [...obj].map(makeObjectSerializable),
+    };
+  } else if (obj instanceof Set) {
+    return {
+      __flipper_object_type__: 'Set',
+      data: [...obj].map(makeObjectSerializable),
+    };
+  } else if (obj instanceof Date) {
+    return {
+      __flipper_object_type__: 'Date',
+      data: obj.toString(),
+    };
+  } else if (obj instanceof Array) {
+    return obj.map(makeObjectSerializable);
+  }
+
+  return Object.entries(obj).reduce(
+    (acc, [key, value]) => ({...acc, [key]: makeObjectSerializable(value)}),
+    {},
+  );
+}
+
+export function deserializeObject(obj: any): any {
+  if (!(obj instanceof Object)) {
+    return obj;
+  }
+  if (obj instanceof Array) {
+    return obj.map(deserializeObject);
+  } else if (obj['__flipper_object_type__']) {
+    const type = obj['__flipper_object_type__'];
+    switch (type) {
+      case 'Map': {
+        return new Map(
+          [...obj.data].map(item => [...item].map(deserializeObject)),
+        );
+      }
+      case 'Set': {
+        return new Set([...obj.data].map(deserializeObject));
+      }
+      case 'Date':
+        return new Date(obj.data);
+    }
+  }
+
+  return Object.entries(obj).reduce(
+    (acc, [key, value]) => ({...acc, [key]: deserializeObject(value)}),
+    {},
+  );
+}