constructor(
   public snackBar: MdSnackBar,
   public router: Router,
   public globalService: GlobalService,
   public localCart: LocalCartService,
   private title: Title,
   private meta: Meta
 ) {
   this.states = globalService.states;
   this.order = globalService.order.getValue();
   if (!this.order.items) {
     router.navigateByUrl('cart');
   }
   if (this.localCart.orderHasItems() && this.localCart.orderHas('shipping')) {
     this.order = this.localCart.orderGetItems();
   }
 }

 this.db.list('/orders').push(this.order).then((item) => {
   this.globalService.cart.next(null);
   this.globalService.order.next(null);
   this.localCart.clearAll();
   if (this.user) {
     this.db.object('/users/' + this.user.uid + '/cart').remove();
     this.db.object('/users/' + this.user.uid + '/orders/' + item.key).set(Date.now().toString());
   }
   this.router.navigateByUrl('checkout/confirmation');
 });

 this.globalService.cart.subscribe((cart) => {
   this.globalCart = cart;
   if (!cart) {
     this.globalCart = {};
   }
   this.localCart.cartUpdateItems(this.globalCart);
   if (this.globalCart && this.globalCart[this.product.entityKey]) {
     this.product.quantity = this.globalCart[this.product.entityKey]['quantity'];
   } else {
     this.product.quantity = 1;
     this.product.total = this.product.price;
   }
 });

 goTo(url: string) {
   if (this.order.shipping.name &&
       this.order.shipping.email &&
       this.order.shipping.address &&
       this.order.shipping.city &&
       this.order.shipping.state &&
       this.order.shipping.zip) {
         this.globalService.order.next(this.order);
         this.router.navigateByUrl(url);
         this.localCart.orderUpdateItems(this.order);
     } else {
         let snackBarRef = this.snackBar.open('You must complete the form', 'OK!', {
           duration: 3000,
           extraClasses: ['warn-snackbar']
         });
     }
 }