import { BlueRain } from '../index';
export declare type hookFn = (...args: any[]) => any;
/**
 * All system hooks are stored in this registry
 */
export default class HookRegistry {
    private BR;
    constructor(BR: BlueRain);
    /**
     * Add a filter function to a hook. If the listener already exists, it will throw an Error.
     * @param {string} hook Name of hook (filter/event) to subscribe to
     * @param {string} name Name of the listener function
     * @param {Function} filter Listener function
     */
    add(hook: string, name: string, listener: hookFn): void;
    /**
     * Sets a filter function to a hook. If the listener already exists, it will be replaced.
     * @param {string} hook Name of hook (filter/event) to subscribe to
     * @param {string} name Name of the listener function
     * @param {Function} filter Listener function
     */
    set(hook: string, name: string, listener: hookFn): void;
    /**
     * Checks the params for the `set` and `add` functions
     * @param {string} hook Name of hook (filter/event) to subscribe to
     * @param {string} name Name of the listener function
     * @param {Function} listener Listener function
     */
    checkParams(hook: string, name: string, listener: hookFn): {
        hook: string;
        name: string;
        listener: hookFn;
    };
    /**
     * Successively run all of a hook's functions on an item
     * @param {String} hook - First argument: the name of the hook
     * @param {'async' |'sync' | 'both'} mode - Second argument: mode in which hook will run.
     * If not given mode will be sync
     * @param {Any} args - Other arguments will be passed to each successive iteration
     * @returns {Object} Returns the item after it's been through all the filters for this hook
     */
    run(hook: string, mode?: 'async' | 'sync' | 'both', ...args: any[]): any;
}