RocketChat/Rocket.Chat

/* eslint-disable @typescript-eslint/ban-types */

type SerializablePrimitive = boolean | number | string | null;

type UnserializablePrimitive = Function | bigint | symbol | undefined;

type CustomSerializable<T> = {
    toJSON(key: string): T;
};

/**
 * The type of a value that was serialized via `JSON.stringify` and then deserialized via `JSON.parse`.
 */
export type Serialized<T> = T extends CustomSerializable<infer U>
    ? Serialized<U>
    : T extends [any, ...any] // is T a tuple?
    ? { [K in keyof T]: T extends UnserializablePrimitive ? null : Serialized<T[K]> }
    : T extends any[]
    ? Serialized<T[number]>[]
    : T extends object
    ? { [K in keyof T]: Serialized<T[K]> }
    : T extends SerializablePrimitive
    ? T
    : T extends UnserializablePrimitive
    ? undefined
    : null;