140 lines
4.2 KiB
Swift
140 lines
4.2 KiB
Swift
//
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// StoreKitHelper.swift
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// Passepartout
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//
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// Created by Davide De Rosa on 9/9/24.
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// Copyright (c) 2024 Davide De Rosa. All rights reserved.
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//
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// https://github.com/passepartoutvpn
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//
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// This file is part of Passepartout.
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//
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// Passepartout is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Passepartout is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Passepartout. If not, see <http://www.gnu.org/licenses/>.
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//
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import Combine
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import Foundation
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import StoreKit
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@MainActor
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public final class StoreKitHelper<ProductType>: InAppHelper where ProductType: RawRepresentable & Hashable,
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ProductType.RawValue == String {
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private let products: [ProductType]
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private let inAppIdentifier: (ProductType) -> String
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private var activeTransactions: Set<Transaction>
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private nonisolated let didUpdateSubject: PassthroughSubject<Void, Never>
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private var observer: Task<Void, Never>?
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public init(products: [ProductType], inAppIdentifier: @escaping (ProductType) -> String) {
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self.products = products
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self.inAppIdentifier = inAppIdentifier
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activeTransactions = []
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didUpdateSubject = PassthroughSubject()
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observer = transactionsObserverTask()
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}
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deinit {
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observer?.cancel()
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}
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}
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extension StoreKitHelper {
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public nonisolated var canMakePurchases: Bool {
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AppStore.canMakePayments
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}
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public nonisolated var didUpdate: AnyPublisher<Void, Never> {
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didUpdateSubject.eraseToAnyPublisher()
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}
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public func fetchProducts() async throws -> [ProductType: InAppProduct] {
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let skProducts = try await Product.products(for: products.map(inAppIdentifier))
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return skProducts.reduce(into: [:]) {
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guard let pid = ProductType(rawValue: $1.id) else {
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return
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}
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$0[pid] = InAppProduct(
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productIdentifier: $1.id,
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localizedTitle: $1.displayName,
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localizedPrice: $1.displayPrice,
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native: $1
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)
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}
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}
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public func purchase(_ inAppProduct: InAppProduct) async throws -> InAppPurchaseResult {
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guard let skProduct = inAppProduct.native as? Product else {
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return .notFound
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}
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switch try await skProduct.purchase() {
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case .success(let verificationResult):
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guard let transaction = try? verificationResult.payloadValue else {
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break
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}
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activeTransactions.insert(transaction)
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didUpdateSubject.send()
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await transaction.finish()
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return .done
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case .pending:
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return .pending
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case .userCancelled:
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break
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@unknown default:
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break
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}
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return .cancelled
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}
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public func restorePurchases() async throws {
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try await AppStore.sync()
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}
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}
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private extension StoreKitHelper {
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nonisolated func transactionsObserverTask() -> Task<Void, Never> {
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Task {
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for await update in Transaction.updates {
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guard let transaction = try? update.payloadValue else {
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continue
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}
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await fetchActiveTransactions()
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await transaction.finish()
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guard !Task.isCancelled else {
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break
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}
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}
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}
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}
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func fetchActiveTransactions() async {
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var activeTransactions: Set<Transaction> = []
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for await entitlement in Transaction.currentEntitlements {
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if let transaction = try? entitlement.payloadValue {
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activeTransactions.insert(transaction)
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}
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}
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self.activeTransactions = activeTransactions
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didUpdateSubject.send()
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}
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}
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