import express from "express";
import { Document } from "mongoose";
import { FernsRouterOptions } from "./api";
import { User } from "./auth";
export interface FernsTransformer<T> {
    transform?: (obj: Partial<T>, method: "create" | "update", user?: User) => Partial<T> | undefined;
    serialize?: (obj: T, user?: User) => Partial<T> | undefined;
}
export declare function AdminOwnerTransformer<T>(options: {
    anonReadFields?: string[];
    authReadFields?: string[];
    ownerReadFields?: string[];
    adminReadFields?: string[];
    anonWriteFields?: string[];
    authWriteFields?: string[];
    ownerWriteFields?: string[];
    adminWriteFields?: string[];
}): FernsTransformer<T>;
export declare function transform<T>(options: FernsRouterOptions<T>, data: Partial<T> | Partial<T>[], method: "create" | "update", user?: User): Partial<T> | (Partial<T> | undefined)[] | undefined;
export declare function serialize<T>(req: express.Request, options: FernsRouterOptions<T>, data: (Document<any, any, any> & T) | (Document<any, any, any> & T)[]): Partial<T> | (Partial<T> | undefined)[] | undefined;
/**
 * Default response handler for FernsRouter. Calls toObject on each doc and returns the result,
 * using transformers.serializer if provided.
 */
export declare function defaultResponseHandler<T>(doc: (Document<any, any, any> & T) | (Document<any, any, any> & T)[] | null, method: "list" | "create" | "read" | "update", request: express.Request, options: FernsRouterOptions<T>): Promise<Partial<T> | (Partial<T> | undefined)[] | null | undefined>;