/// <reference types="node" />
import { PluginAPI } from '../../entities/api/PluginAPI';
import { VariableLoader } from './VariableLoader';
/**
 * Allows you to load Bento Variables and set their defaults from files
 * If you have a custom file format or prefer to use something other than JSON
 * You can provide a custom `parseFileContents` function. Just return Key/Value pairs
 * derived from the file Buffer.
 *
 * Keep in mind that if you have key `HELLO_WORLD` in a file or defaults file and `HELLO_WORLD` in the enviorment
 * the value from the enviorment will take priority
 */
export declare class VariableFileLoader extends VariableLoader {
    name: string;
    api: PluginAPI;
    /**
     * Registered files and Variables they loaded
     */
    readonly files: Map<string, Set<string>>;
    private readonly watching;
    /**
     * Registered fs Watchers
     */
    private readonly watchers;
    /**
     * @param watching Enable file watching? (Automatic hot-loading of variables in files)
     */
    constructor(watching?: boolean);
    /**
     * Add Multiple Variable Files
     * @param files Array of File Locations
     * @param defaults Defaults Mode
     *
     * @returns Array<Path>
     */
    addFiles(files: Array<Array<string>>, defaults: boolean): Promise<Array<string>>;
    /**
     * Add Variables File
     * @param location File Location
     * @param defaults Defaults Mode
     *
     * @throws ProcessingError If `fs.access` check fails and `defaults` is true
     * @returns Path
     */
    addFile(location: Array<string>, defaults?: boolean): Promise<string>;
    /**
     * Remove Variables file
     * @param location File Location
     * @param purge Purge Variables that this file Added
     */
    removeFile(location: Array<string>, purge: boolean): void;
    private addWatcher;
    /**
     * Read and return file contents
     * @param location File Location
     *
     * @returns File Buffer
     */
    private getFileContents;
    /**
     * Convert File Buffer into Key/Value pairings
     * @param data File Buffer
     *
     * @returns Key/Value Pairings Object
     */
    parseFileContents(data: Buffer): {
        [key: string]: unknown;
    };
    protected processFile(location: string, defaults: boolean): Promise<void>;
}