135 lines
4.0 KiB
Swift
135 lines
4.0 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<PID>: InAppHelper where PID: RawRepresentable & Hashable & InAppIdentifierProviding,
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PID.RawValue == String {
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private let identifiers: [PID]
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@Published
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public private(set) var products: [PID: InAppProduct]
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@Published
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public private(set) var purchasedIdentifiers: Set<String>
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private var activeTransactions: Set<Transaction>
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private var observer: Task<Void, Never>?
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public init(identifiers: [PID]) {
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self.identifiers = identifiers
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products = [:]
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purchasedIdentifiers = []
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activeTransactions = []
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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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public nonisolated var canMakePurchases: Bool {
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AppStore.canMakePayments
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}
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public func fetchProducts() async throws {
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guard products.isEmpty else {
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return
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}
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do {
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let skProducts = try await Product.products(for: identifiers.map(\.rawValue))
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products = skProducts.reduce(into: [:]) {
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guard let pid = PID(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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} catch {
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products = [:]
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throw error
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}
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}
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// FIXME: #424, implement purchase
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public func purchase(productWithIdentifier productIdentifier: ProductIdentifier) async throws -> InAppPurchaseResult {
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fatalError("purchase")
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}
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// FIXME: #424, implement restore purchases
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public func restorePurchases() async throws {
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fatalError("restorePurchases")
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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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await refreshTransactions()
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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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}
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}
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}
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func refreshTransactions() async {
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for await result in Transaction.currentEntitlements {
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guard case .verified(let transaction) = result else {
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continue
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}
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guard transaction.revocationDate == nil else {
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purchasedIdentifiers.remove(transaction.productID)
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continue
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}
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purchasedIdentifiers.insert(transaction.productID)
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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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}
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}
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