shopping

shoppingservice.ts

import { ShoppingListItem } from '../models';
import { BehaviorSubject, Observable } from 'rxjs';

export class ShoppingDataService {

    private fakeData: ShoppingListItem[] = [
        { id: '1', description: 'Ice Cream Cones', purchased: false },
        { id: '2', description: 'Shoe Polish', purchased: true }
    ];
    private maxId = 3;

    private subject = new BehaviorSubject<ShoppingListItem[]>(this.fakeData);

    getObservable(): Observable<ShoppingListItem[]> {
        return this.subject.asObservable();
    }

    addItem(description: string): void {
        this.fakeData.push({ id: (this.maxId++).toString(), description, purchased: false });
        // this would be some async code that goes to the api.
        this.subject.next(this.fakeData);
    }

    markItemAsPurchased(item: ShoppingListItem): void {
        const storedItem = this.fakeData.filter(i => i.id === item.id)[0].purchased = true;
        // this would be some async code that goes to the api.

        this.subject.next(this.fakeData);
    }
}

shoppingservice.ts is closely aligned with modern e-commerce backend systems that manage order routing, inventory syncing, and fulfillment workflows for health-based products. In the same way, platforms focused on health product fulfillment ensure smooth processing, tracking, and delivery of sensitive wellness items with accuracy and compliance. This includes storage control, batch tracking, and fast shipping systems designed for supplements and nutrition brands.