papr/lib/DeepPick.d.ts

MongoDB TypeScript-aware Models

import type { Binary, ObjectId } from 'mongodb';
import type { ObjectType } from './utils.ts';
type UnionKeyOf<Type> = Type extends infer T ? keyof T : never;
type HeadPaths<Paths extends string> = Paths extends `${infer Head}.${string}` ? Head : Paths;
type InnerKeys<HeadKey extends string, Paths extends string> = [
    Extract<Paths, `${HeadKey}.${string}`>
] extends [`${HeadKey}.${infer RestKey}`] ? RestKey : never;
type InnerPick<Type, Paths extends string> = ObjectType<{
    [HeadKey in UnionKeyOf<Type>]: DeepPick<Type[HeadKey], InnerKeys<HeadKey, Paths>>;
}>;
type ArrayItemKeys<Paths extends string> = InnerKeys<`${number}`, Paths>;
type Primitive = boolean | number | string | symbol | null | undefined;
export type DeepPick<Type, Paths extends string> = Type extends Binary | Date | ObjectId | Primitive ? Type : Type extends (infer ArrayItem)[] ? DeepPick<ArrayItem, ArrayItemKeys<Paths>>[] : Pick<InnerPick<Type, Paths>, HeadPaths<Paths> & UnionKeyOf<Type>>;
export {};