const IS_RECORD_SYMBOL = "@@__IMMUTABLE_RECORD__@@";
const IS_COLLECTION_SYMBOL = "@@__IMMUTABLE_ITERABLE__@@";
function isImmutable(v) {
return v && (v[IS_COLLECTION_SYMBOL] || v[IS_RECORD_SYMBOL]);
}
const OBJECT_PROTO = Object.getPrototypeOf({});
function getUnserializableMessage(err) {
if (err instanceof Error) {
return `<unserializable>: ${err.message}`;
}
if (typeof err === "string") {
return `<unserializable>: ${err}`;
}
return "<unserializable>";
}
// https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm
function serializeValue(val, seen = new WeakMap()) {
if (!val || typeof val === "string") {
return val;
}
if (val instanceof Error && "toJSON" in val && typeof val.toJSON === "function") {
const jsonValue = val.toJSON();
if (jsonValue && jsonValue !== val && typeof jsonValue === "object") {
if (typeof val.message === "string") {
safe(() => jsonValue.message ?? (jsonValue.message = normalizeErrorMessage(val.message)));
}
if (typeof val.stack === "string") {
safe(() => jsonValue.stack ?? (jsonValue.stack = val.stack));
}
if (typeof val.name === "string") {
safe(() => jsonValue.name ?? (jsonValue.name = val.name));
}
if (val.cause != null) {
safe(() => jsonValue.cause ?? (jsonValue.cause = serializeValue(val.cause, seen)));
}
}
return serializeValue(jsonValue, seen);
}
if (typeof val === "function") {
return `Function<${val.name || "anonymous"}>`;
}
if (typeof val === "symbol") {
return val.toString();
}
if (typeof val !== "object") {
return val;
}
if (typeof Buffer !== "undefined" && val instanceof Buffer) {
return `<Buffer(${val.length}) ...>`;
}
if (typeof Uint8Array !== "undefined" && val instanceof Uint8Array) {
return `<Uint8Array(${val.length}) ...>`;
}
// cannot serialize immutables as immutables
if (isImmutable(val)) {
return serializeValue(val.toJSON(), seen);
}
if (val instanceof Promise || val.constructor && val.constructor.prototype === "AsyncFunction") {
return "Promise";
}
if (typeof Element !== "undefined" && val instanceof Element) {
return val.tagName;
}
if (typeof val.toJSON === "function") {
return serializeValue(val.toJSON(), seen);
}
if (seen.has(val)) {
return seen.get(val);
}
if (Array.isArray(val)) {
// eslint-disable-next-line unicorn/no-new-array -- we need to keep sparse arrays ([1,,3])
const clone = new Array(val.length);
seen.set(val, clone);
val.forEach((e, i) => {
try {
clone[i] = serializeValue(e, seen);
} catch (err) {
clone[i] = getUnserializableMessage(err);
}
});
return clone;
} else {
// Objects with `Error` constructors appear to cause problems during worker communication
// using `MessagePort`, so the serialized error object is being recreated as plain object.
const clone = Object.create(null);
seen.set(val, clone);
let obj = val;
while (obj && obj !== OBJECT_PROTO) {
Object.getOwnPropertyNames(obj).forEach((key) => {
if (key in clone) {
return;
}
try {
clone[key] = serializeValue(val[key], seen);
} catch (err) {
// delete in case it has a setter from prototype that might throw
delete clone[key];
clone[key] = getUnserializableMessage(err);
}
});
obj = Object.getPrototypeOf(obj);
}
if (val instanceof Error) {
safe(() => val.message = normalizeErrorMessage(val.message));
}
return clone;
}
}
function safe(fn) {
try {
return fn();
} catch {}
}
function normalizeErrorMessage(message) {
return message.replace(/__(vite_ssr_import|vi_import)_\d+__\./g, "");
}
export { serializeValue };
