angular5-course/src/app/recipes/recipe-detail/recipe-detail.component.ts

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute, Params } from '@angular/router';
import { Store } from '@ngrx/store';
import { Observable } from 'rxjs/Observable';

import { Recipe } from '../recipe.model';
import * as ShoppingListActions from '../../shopping-list/ngrx/shopping-list.actions';
import * as fromApp from '../../ngrx/app.reducers';
import * as fromRecipe from '../ngrx/recipe.reducers';
import * as RecipeACtions from '../ngrx/recipe.actions';

@Component({
  selector: 'app-recipe-detail',
  templateUrl: './recipe-detail.component.html',
  styleUrls: ['./recipe-detail.component.css']
})
export class RecipeDetailComponent implements OnInit {
  recipeState: Observable<fromRecipe.State>;
  id: number;
  
  constructor(private route: ActivatedRoute,
              private router: Router,
              private store: Store<fromRecipe.FeatureState>) { }

  ngOnInit() {
    this.route.params.subscribe(
      (params: Params) => {
        this.id = +params['id'];
        this.recipeState = this.store.select('recipes');
      }
    );
  }

  onAddToShoppingList() {
    this.store.select('recipes')
      .take(1)
      .subscribe((recipeState: fromRecipe.State) => {
        this.store.dispatch(new ShoppingListActions.AddIngredients(recipeState.recipes[this.id].ingredients));
      });
    
  }

  onEditRecipe() {
    this.router.navigate(['edit'], {relativeTo: this.route});
  }

  onDelete() {
    this.store.dispatch(new RecipeACtions.DeleteRecipe(this.id));
    this.router.navigate(['/recipes']);
  }
}