misskey-awawa/src/prelude/await-all.ts

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type Await<T> = T extends Promise<infer U> ? U : T;
type AwaitAll<T> = {
[P in keyof T]: Await<T[P]>;
};
export async function awaitAll<T>(obj: T): Promise<AwaitAll<T>> {
const target = {} as any;
const keys = Object.keys(obj);
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const values = Object.values(obj);
const resolvedValues = await Promise.all(values.map(value =>
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(!value || !value.constructor || value.constructor.name !== 'Object')
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? value
: awaitAll(value)
));
for (let i = 0; i < keys.length; i++) {
target[keys[i]] = resolvedValues[i];
}
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return target;
}