/// <reference types="node" />
import * as http from 'http';
import { NextFunction } from 'connect';
/**
 * All templates must be listed here
 * TODO: maybe have this as a parameter?
 */
declare const templateConfigs: {
    success: {
        file: string;
    };
    error: {
        file: string;
    };
    metadata: {
        file: string;
    };
};
declare type TemplateName = keyof typeof templateConfigs;
/**
 * Should probably be created only once, then passed around to all middlewares that need it.
 */
export declare type AssetEngine = {
    /**
     * Get the result of a template rendering as a string. Probably only useful for tests.
     */
    applyTemplate: (templateName: TemplateName, data: Dictionary<string>) => Promise<string>;
    /**
     * Render a template and use it as the HTTP response.
     */
    sendTemplate: (templateName: TemplateName, data: Dictionary<string>, statusCode: number, res: http.ServerResponse, next: NextFunction) => void;
    /**
     * Serve a static file.
     */
    sendStatic: (staticFile: string, statusCode: number, res: http.ServerResponse, next: NextFunction) => void;
    /**
     * Send a JSON response. This function is dumb, it assumes the 'response' object is someting
     * that can be turned into a JSON string
     */
    sendJson: (response: Record<string, unknown>, statusCode: number, res: http.ServerResponse) => void;
};
export declare const load: (assetsRoot: string) => Promise<AssetEngine>;
export {};