import { Context } from "koa";
import { FilePointer } from "@sealcode/file-manager";
import { FormDataValue } from "../form-types.js";
import { FieldParseResult, FormField } from "./field.js";
import { File as FileControl } from "../controls/file.js";
import { FormControl, FormControlContext } from "../controls/form-control.js";
export type FileContainer = {
    old: FilePointer | null;
    new: FilePointer | null;
};
export declare class File<Required extends boolean> extends FormField<Required, FileContainer, FormControl> {
    readonly required: Required;
    constructor(required: Required);
    parse(ctx: Context, raw_value: FormDataValue): Promise<FieldParseResult<FileContainer>>;
    getDatabaseValue(ctx: Context, data: Record<string, FormDataValue>): Promise<FilePointer | undefined>;
    getEmptyValue(): {
        old: null;
        new: null;
    };
    getControl(): FileControl;
    getSealiousCreateValue(fctx: FormControlContext): Promise<FilePointer | undefined>;
    sealiousValueToForm(ctx: Context, sealiousValue: FilePointer | string | null): Promise<{
        old: FilePointer | undefined;
    } | Record<string, never>>;
}