angular5-course/src/app/recipes/recipe.service.ts

import { EventEmitter } from "@angular/core";
import { Subject } from "rxjs/Subject";

import { Recipe } from "./recipe.model";
import { Ingredient } from "../shared/ingredient.model";

export class RecipeService {
    recipesChanged = new Subject<Recipe[]>();
    private recipes: Recipe[] = [];

    replaceRecipes(recipes: Recipe[]) {
        this.recipes = recipes;
        this.recipesChanged.next(this.recipes.slice());
    }

    getRecipes() {
        return this.recipes.slice();
    }
}