//
//  Storage.swift
//  Cashbox
//
//  Created by Konstanty on 27.07.17.
//  Copyright © 2017 Konstanty. All rights reserved.
//

import Foundation

class Storage {
    static let instance = Storage() //singleton
    private var products = [Product]()

    //Проверка наличия
    class func isProductAvailable(productID: String) -> Bool {
        for product in instance.products {
            if product.productID == productID {
                return true
            }
        }
        return false
    }
    func addProduct(product: Product) {
        products.append(product)
    }

    func returnProduct(productID: String) {
        products.append(productID)
    }

    func removeProduct(productID: String) {
        for i in 0 ..< products.count {
            if products[i].productID == productID {
            products.remove(at: i)
            break
            }
        }
    }
    class func productById(productID: String) -> Product? {
        for product in instance.products {
            if product.productID == productID {
                return product
            }
        }
        return nil
    }
//    class func returnProduct(productID: String) {
//        for product in instance.products {
//            if product.productID == productID {
//            Product.price += Customer.moneyInWallet
//
//    }
}