Finds nested promises within the provided value/object and returns one promise that resolves when all nested promises are resolved.

resolveNestedPromises.ts

/**
 * Finds nested promises within the provided value/object and returns one
 * promise that resolves when all nested promises are resolved.
 * @param value The value to promisify.
 */
export const resolveNestedPromises = async <T>(value: T): Promise<T> => {
    if (value instanceof Promise) return value;

    if (value instanceof Array) {
        const elements = value.map(entry => resolveNestedPromises(entry));
        return Promise.all(elements) as any;
    }

    if (typeof value === 'object' && value !== null) {
        let result: any = {};
        for (const key of Object.keys(value)) {
            const property = await resolveNestedPromises((value as any)[key]);
            result[key] = property;
        }
        return result;
    }

    return value;
};