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SubscriptionFlowViewModel.swift
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SubscriptionFlowViewModel.swift
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//
// SubscriptionFlowViewModel.swift
// DuckDuckGo
//
// Copyright © 2023 DuckDuckGo. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import Foundation
import UserScript
import Combine
import Core
#if SUBSCRIPTION
@available(iOS 15.0, *)
final class SubscriptionFlowViewModel: ObservableObject {
let userScript: SubscriptionPagesUserScript
let subFeature: SubscriptionPagesUseSubscriptionFeature
let purchaseManager: PurchaseManager
let viewTitle = UserText.settingsPProSection
enum Constants {
static let navigationBarHideThreshold = 40.0
}
private var cancellables = Set<AnyCancellable>()
private var canGoBackCancellable: AnyCancellable?
// State variables
var purchaseURL = URL.purchaseSubscription
enum FeatureName {
static let netP = "vpn"
static let itr = "identity-theft-restoration"
static let dbp = "personal-information-removal"
}
// Published properties
@Published var hasActiveSubscription = false
@Published var transactionStatus: SubscriptionPagesUseSubscriptionFeature.TransactionStatus = .idle
@Published var activatingSubscription = false
@Published var shouldDismissView = false
@Published var webViewModel: AsyncHeadlessWebViewViewModel
@Published var shouldShowNavigationBar: Bool = false
@Published var selectedFeature: SettingsViewModel.SettingsSection?
@Published var canNavigateBack: Bool = false
init(userScript: SubscriptionPagesUserScript = SubscriptionPagesUserScript(),
subFeature: SubscriptionPagesUseSubscriptionFeature = SubscriptionPagesUseSubscriptionFeature(),
purchaseManager: PurchaseManager = PurchaseManager.shared,
selectedFeature: SettingsViewModel.SettingsSection? = nil) {
self.userScript = userScript
self.subFeature = subFeature
self.purchaseManager = purchaseManager
self.selectedFeature = selectedFeature
self.webViewModel = AsyncHeadlessWebViewViewModel(userScript: userScript,
subFeature: subFeature,
settings: AsyncHeadlessWebViewSettings(bounces: false))
}
// Observe transaction status
private func setupTransactionObserver() async {
subFeature.$transactionStatus
.sink { [weak self] status in
guard let self = self else { return }
Task { await self.setTransactionStatus(status) }
}
.store(in: &cancellables)
subFeature.$hasActiveSubscription
.receive(on: DispatchQueue.main)
.sink { [weak self] value in
self?.hasActiveSubscription = value
}
.store(in: &cancellables)
subFeature.$activateSubscription
.receive(on: DispatchQueue.main)
.sink { [weak self] value in
if value {
self?.subFeature.activateSubscription = false
self?.activatingSubscription = true
}
}
.store(in: &cancellables)
subFeature.$selectedFeature
.receive(on: DispatchQueue.main)
.sink { [weak self] value in
if value != nil {
switch value?.feature {
case FeatureName.netP:
self?.selectedFeature = .netP
case FeatureName.itr:
self?.selectedFeature = .itr
case FeatureName.dbp:
self?.selectedFeature = .dbp
default:
break
}
self?.finalizeSubscriptionFlow()
}
}
.store(in: &cancellables)
webViewModel.$scrollPosition
.receive(on: DispatchQueue.main)
.sink { [weak self] value in
self?.shouldShowNavigationBar = value.y > Constants.navigationBarHideThreshold
}
.store(in: &cancellables)
canGoBackCancellable = webViewModel.$canGoBack
.receive(on: DispatchQueue.main)
.sink { [weak self] value in
self?.canNavigateBack = value
}
}
@MainActor
private func setTransactionStatus(_ status: SubscriptionPagesUseSubscriptionFeature.TransactionStatus) {
self.transactionStatus = status
}
@MainActor
private func disableGoBack() {
canGoBackCancellable?.cancel()
canNavigateBack = false
}
func initializeViewData() async {
await self.setupTransactionObserver()
await self.updateSubscriptionStatus()
webViewModel.navigationCoordinator.navigateTo(url: purchaseURL )
}
func finalizeSubscriptionFlow() {
canGoBackCancellable?.cancel()
cancellables.removeAll()
subFeature.selectedFeature = nil
hasActiveSubscription = false
transactionStatus = .idle
activatingSubscription = false
shouldShowNavigationBar = false
selectedFeature = nil
canNavigateBack = false
shouldDismissView = true
}
func restoreAppstoreTransaction() {
Task {
if await subFeature.restoreAccountFromAppStorePurchase() {
await disableGoBack()
await webViewModel.navigationCoordinator.reload()
} else {
await MainActor.run {
}
}
}
}
func updateSubscriptionStatus() async {
if AccountManager().isUserAuthenticated && hasActiveSubscription == false {
await disableGoBack()
await webViewModel.navigationCoordinator.reload()
}
}
@MainActor
func navigateBack() async {
await webViewModel.navigationCoordinator.goBack()
}
}
#endif