// reducer.ts

export const SECOND = "SECOND";

export const HOUR = "HOUR";

export const clock = (state = new Date(), {type, payload})=> {

    const date = new Date(state.getTime());

    switch(type){

        case SECOND:

            date.setSeconds(date.getSeconds() + payload);

            return date;

        case HOUR:

            date.setHours(date.getHours() + payload);

            return date;

    }

    return state;

};

//app.ts

/**

 * Created by wanzhen on 26.4.2016.

 */

import {Component} from 'angular2/core';

import {Observable} from 'rxjs/Observable';

import 'rxjs/add/observable/interval';

import 'rxjs/add/operator/map';

import 'rxjs/add/observable/merge';

import 'rxjs/add/operator/startWith';

import 'rxjs/add/operator/scan';

import 'rxjs/add/operator/mapTo';

import {Subject} from "rxjs/Subject";

import {Store} from '@ngrx/store';

import {SECOND, HOUR} from './reducer';

@Component({

    selector: 'app',

    template: `

        <button (click)="click$.next()">Update</button>

        <h1>{{clock | async | date:'yMMMMEEEEdjms'}}</h1>

        `

})

export class App {

    click$ = new Subject();

    clock;

    constructor(store:Store) {

        this.clock = store.select('clock');

        Observable.merge(

            this.click$.mapTo({type: HOUR, payload: }),

            Observable.interval().mapTo({type: SECOND, payload: })

            )

            .subscribe((action)=>{

                store.dispatch(action)

            })

    }

}

// main.ts

import {bootstrap} from 'angular2/platform/browser';

import {App} from './app';

import {provideStore} from '@ngrx/store';

import {clock} from './reducer';

bootstrap(App, [

    provideStore({clock})

]).then(

    ()=> console.log('App running...'),

    err=> console.log(err)

);

/*

*  1. Create a reducer

*  2. Use provideStore({reducer_name}) to provide store

*  3. Use store.select('reducer_name') to get store in Observable type

*  4. Apply logic to dispatch the action

* */