120 lines
4.9 KiB
Swift
120 lines
4.9 KiB
Swift
//
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// InAppReceiptVerificator.swift
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// SwiftyStoreKit
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//
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// Created by Andrea Bizzotto on 16/05/2017.
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// Copyright (c) 2017 Andrea Bizzotto (bizz84@gmail.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import Foundation
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class InAppReceiptVerificator: NSObject {
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let appStoreReceiptURL: URL?
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init(appStoreReceiptURL: URL? = Bundle.main.appStoreReceiptURL) {
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self.appStoreReceiptURL = appStoreReceiptURL
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}
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var appStoreReceiptData: Data? {
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guard let receiptDataURL = appStoreReceiptURL,
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let data = try? Data(contentsOf: receiptDataURL) else {
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return nil
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}
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return data
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}
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private var receiptRefreshRequest: InAppReceiptRefreshRequest?
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/**
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* Verify application receipt.
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* - Parameter validator: Validator to check the encrypted receipt and return the receipt in readable format
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* - Parameter forceRefresh: If true, refreshes the receipt even if one already exists.
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* - Parameter refresh: closure to perform receipt refresh (this is made explicit for testability)
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* - Parameter completion: handler for result
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*/
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@discardableResult
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public func verifyReceipt(using validator: ReceiptValidator,
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forceRefresh: Bool,
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refresh: InAppReceiptRefreshRequest.ReceiptRefresh = InAppReceiptRefreshRequest.refresh,
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completion: @escaping (VerifyReceiptResult) -> Void) -> InAppRequest? {
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return fetchReceipt(forceRefresh: forceRefresh, refresh: refresh) { result in
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switch result {
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case .success(let receiptData):
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self.verify(receiptData: receiptData, using: validator, completion: completion)
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case .error(let error):
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completion(.error(error: error))
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}
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}
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}
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/**
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* Fetch application receipt. This method does two things:
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* * If the receipt is missing, refresh it
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* * If the receipt is available or is refreshed, validate it
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* - Parameter forceRefresh: If true, refreshes the receipt even if one already exists.
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* - Parameter refresh: closure to perform receipt refresh (this is made explicit for testability)
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* - Parameter completion: handler for result
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*/
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@discardableResult
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public func fetchReceipt(forceRefresh: Bool,
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refresh: InAppReceiptRefreshRequest.ReceiptRefresh = InAppReceiptRefreshRequest.refresh,
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completion: @escaping (FetchReceiptResult) -> Void) -> InAppRequest? {
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if let receiptData = appStoreReceiptData, forceRefresh == false {
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completion(.success(receiptData: receiptData))
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return nil
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} else {
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receiptRefreshRequest = refresh(nil) { result in
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self.receiptRefreshRequest = nil
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switch result {
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case .success:
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if let receiptData = self.appStoreReceiptData {
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completion(.success(receiptData: receiptData))
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} else {
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completion(.error(error: .noReceiptData))
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}
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case .error(let e):
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completion(.error(error: .networkError(error: e)))
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}
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}
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return receiptRefreshRequest
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}
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}
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/**
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* - Parameter receiptData: encrypted receipt data
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* - Parameter validator: Validator to check the encrypted receipt and return the receipt in readable format
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* - Parameter completion: handler for result
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*/
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private func verify(receiptData: Data, using validator: ReceiptValidator, completion: @escaping (VerifyReceiptResult) -> Void) {
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validator.validate(receiptData: receiptData) { result in
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DispatchQueue.main.async {
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completion(result)
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}
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}
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}
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}
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