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import { Action } from 'redux';
import { CounterActions } from './actions'

export interface AppState {
  counter: number;
};

export const INITIAL_STATE: AppState = {
  counter: 0,
};


export function rootReducer(state: AppState, action : Action) : AppState {
  switch(action.type) {
    case CounterActions.INCREMENT: return {counter:state.counter+1};
    case CounterActions.DECREMENT: return {counter:state.counter-1};
    default : return state;
  }
}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import {NgReduxModule, NgRedux, DevToolsExtension  } from '@angular-redux/store';
import { AppState, INITIAL_STATE, rootReducer } from './store';
import { CounterActions } from './actions';

import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    NgReduxModule
  ],
  providers: [CounterActions],
  bootstrap: [AppComponent]
})
export class AppModule {
 constructor(ngRedux : NgRedux<AppState>) {
   ngRedux.configureStore(rootReducer, INITIAL_STATE);
 }



}

import { Component } from '@angular/core';
import {Observable} from 'rxjs/Observable';
import {NgRedux, select} from '@angular-redux/store';
import {CounterActions} from './actions';
import {AppState} from './store';


@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  @select('counter') readonly count$: Observable<number>;

  constructor(private ngRedux : NgRedux<AppState>, private actions: CounterActions) {}

  increment() : boolean {
    console.log("incrementing");
    this.ngRedux.dispatch(this.actions.increment());
    return false;
  }

  decrement() : boolean {
    console.log("decrementing");
    this.ngRedux.dispatch(this.actions.decrement());
    return false;
  }


}

import { Injectable } from '@angular/core';
import { NgRedux } from '@angular-redux/store';
import { Action } from 'redux';
import { AppState } from './store';


@Injectable()
export class CounterActions {
  static INCREMENT = 'INCREMENT';
  static DECREMENT = 'DECREMENT';


  increment(): Action  {
    return {type:CounterActions.INCREMENT};
  }

  decrement(): Action {
    return {type:CounterActions.DECREMENT};
  }
}