import { HooksInterface, LifecycleHandler, LifecycleHook } from './types';
/**
 * Shopify App Bridge can be extended with hooks, which run when actions are dispatched and updated.
 * Hooks are middleware functions that can modify or cancel actions.
 *
 * The [validation middleware](../validate/README.md) is implemented using hooks.
 *
 * @remarks
 * Here’s an example hook that modifies all Toast show actions to have a duration of five seconds.
 *
 * ```ts
 * import createApp, {LifecycleHook, DispatchActionHook} from '@shopify/app-bridge';
 * import {Toast} from '@shopify/app-bridge/actions'
 *
 * const app = createApp({apiKey: API_KEY, host: HOST});
 *
 * function makeToastsFiveSeconds: DispatchActionHook(next) {
 *   return function(action){
 *       if(action.type === Toast.Action.SHOW) {
 *         const modifiedAction = {
 *           ...action,
 *           payload: {
 *             ...action.payload,
 *             duration: 5000,
 *           },
 *         };
 *         return next(modifiedAction);
 *       } else {
 *         // don’t modify non-Toast actions
 *         return next(action);
 *       }
 *   }
 * }
 *
 * app.hooks.set(LifecycleHook.DispatchAction, makeToastsFiveSeconds);
 * ```
 *
 * The hook function `makeToastsFiveSeconds()` takes a `next()` function as its argument.
 * The hook function returns an anonymous function, which takes the action being dispatched as its argument.
 *
 * To modify an action, call `next()` with the modified action, as in the example.
 * To cancel an action, don’t call `next()`, and the action will not be dispatched.
 */
export default class Hooks implements HooksInterface {
    private map;
    set(hook: LifecycleHook, handler: LifecycleHandler): () => boolean;
    get(hook: LifecycleHook): LifecycleHandler[] | undefined;
    run<C>(hook: LifecycleHook, final: Function, context: C, ...initialArgs: any[]): any;
}