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16 changes: 15 additions & 1 deletion packages/util/src/serializableObject.ts
Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,18 @@ const hasInnerError = (error: unknown): error is { innerError: unknown } =>
const innerErrorHasData = (innerError: unknown): innerError is { data: unknown } =>
typeof innerError === 'object' && innerError !== null && 'data' in innerError;

const isNativeNonSerializableType = (obj: unknown): boolean => {
if (typeof obj === 'undefined' || typeof obj === 'bigint') return true;
if (typeof obj === 'object' && obj !== null) {
if (obj instanceof Date) return true;
if (obj instanceof Error) return true;
if (obj instanceof Map) return true;
if (obj instanceof Set) return true;
if (ArrayBuffer.isView(obj)) return true;
}
return false;
};

export const toSerializableObject = (obj: unknown, options: ToSerializableObjectOptions = {}): unknown => {
if (PLAIN_TYPES.has(typeof obj)) return obj;
const { transformationTypeKey = defaultTransformationTypeKey, serializeKey = defaultTransformKey } = options;
Expand Down Expand Up @@ -110,7 +122,9 @@ export const toSerializableObject = (obj: unknown, options: ToSerializableObject
};

const fromSerializableObjectUnknown = (obj: unknown, options: FromSerializableObjectOptions = {}): unknown => {
if (PLAIN_TYPES.has(typeof obj)) return obj;
if (PLAIN_TYPES.has(typeof obj)) return obj; // no-op for plain types
if (isNativeNonSerializableType(obj)) return obj; // no-op for native types

if (typeof obj === 'object') {
if (obj === null) return null;
if (Array.isArray(obj)) {
Expand Down
14 changes: 14 additions & 0 deletions packages/util/test/serializableObject.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -111,5 +111,19 @@ describe('serializableObject', () => {
const obj = [{ a: [{ b: 1, c: '2' }] }, 3];
expect(fromSerializableObject(obj)).toEqual(obj);
});

it('returns the identical object when input is already serialized', () => {
const obj = {
bigint: 123n,
buffer: new Uint8Array(Buffer.from('data')),
date: new Date(),
error: new Error('error obj'),
map: new Map([['key', 1n]]),
nullVal: null,
set: new Set(['item1', 1n]),
undefinedVal: undefined
};
expect(fromSerializableObject(obj)).toEqual(obj);
});
});
});
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