EllinaKuznetcova

func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        for transaction in transactions {
            guard let productType = ProductType(rawValue: transaction.payment.productIdentifier) else {fatalError()}
            switch transaction.transactionState {
            case .purchasing:
                self.delegate?.inAppLoadingStarted()
            case .purchased:
                SKPaymentQueue.default().finishTransaction(transaction)
                self.updateSubscriptionStatus()
                self.isSubscriptionAvailable = true

EllinaKuznetcova

var isSubscriptionAvailable: Bool = true
        {
        didSet(value) {
            self.delegate?.subscriptionStatusUpdated(value: value)
        }
    }

EllinaKuznetcova

enum InAppErrors: Swift.Error {
    case noSubscriptionPurchased
    case noProductsAvailable
    
    var localizedDescription: String {
        switch self {
        case .noSubscriptionPurchased:
            return "No subscription purchased"
        case .noProductsAvailable:
            return "No products available"

EllinaKuznetcova

protocol InAppManagerDelegate: class {
    func inAppLoadingStarted()
    func inAppLoadingSucceded(productType: ProductType)
    func inAppLoadingFailed(error: Swift.Error?)
    func subscriptionStatusUpdated(value: Bool)
}

EllinaKuznetcova

extension InAppManager: SKPaymentTransactionObserver {
    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        for transaction in transactions {
            guard let productType = ProductType(rawValue: transaction.payment.productIdentifier) else {fatalError()}
            switch transaction.transactionState {
            case .purchasing:
            case .purchased:
            case .failed:
            case .restored:
            case .deferred:

EllinaKuznetcova

//
//  InAppManager.swift
//
//  Created by Ellina Kuznetcova on 12/10/2016.
//  Copyright © 2016 Flatstack. All rights reserved.
//

import Foundation
import StoreKit