2021-06-15 17:21:33 +00:00
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/*
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Copyright 2021 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import UIKit
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final class SettingsSecureBackupViewModel: SettingsSecureBackupViewModelType {
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// MARK: - Properties
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weak var viewDelegate: SettingsSecureBackupViewModelViewDelegate?
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// MARK: Private
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2021-06-16 09:50:50 +00:00
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private let recoveryService: MXRecoveryService
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private let keyBackup: MXKeyBackup
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2021-06-16 09:50:50 +00:00
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init(recoveryService: MXRecoveryService, keyBackup: MXKeyBackup) {
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self.recoveryService = recoveryService
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self.keyBackup = keyBackup
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self.registerKeyBackupVersionDidChangeStateNotification()
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}
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private func registerKeyBackupVersionDidChangeStateNotification() {
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NotificationCenter.default.addObserver(self, selector: #selector(keyBackupDidStateChange), name: NSNotification.Name.mxKeyBackupDidStateChange, object: self.keyBackup)
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}
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@objc private func keyBackupDidStateChange() {
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self.checkKeyBackupState()
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}
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func process(viewAction: SettingsSecureBackupViewAction) {
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guard let viewDelegate = self.viewDelegate else {
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return
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}
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switch viewAction {
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case .load:
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viewDelegate.settingsSecureBackupViewModel(self, didUpdateViewState: .loading)
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self.checkKeyBackupState()
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case .resetSecureBackup,
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.createSecureBackup: // The implement supports both
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viewDelegate.settingsSecureBackupViewModelShowSecureBackupReset(self)
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2021-06-16 06:18:23 +00:00
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case .createKeyBackup:
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viewDelegate.settingsSecureBackupViewModelShowKeyBackupCreate(self)
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case .restoreFromKeyBackup(let keyBackupVersion):
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viewDelegate.settingsSecureBackupViewModel(self, showKeyBackupRecover: keyBackupVersion)
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case .confirmDeleteKeyBackup(let keyBackupVersion):
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viewDelegate.settingsSecureBackupViewModel(self, showKeyBackupDeleteConfirm: keyBackupVersion)
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case .deleteKeyBackup(let keyBackupVersion):
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self.deleteKeyBackupVersion(keyBackupVersion)
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}
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}
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// MARK: - Private
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private func checkKeyBackupState() {
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// Check homeserver update in background
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self.keyBackup.forceRefresh(nil, failure: nil)
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if let keyBackupVersion = self.keyBackup.keyBackupVersion {
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self.keyBackup.trust(for: keyBackupVersion, onComplete: { [weak self] (keyBackupVersionTrust) in
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guard let sself = self else {
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return
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}
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sself.computeState(withBackupVersionTrust: keyBackupVersionTrust)
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})
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} else {
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computeState()
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}
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}
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private func computeState(withBackupVersionTrust keyBackupVersionTrust: MXKeyBackupVersionTrust? = nil) {
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var viewState: SettingsSecureBackupViewState?
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var keyBackupState: SettingsSecureBackupViewState.KeyBackupState?
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switch self.keyBackup.state {
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case MXKeyBackupStateUnknown,
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MXKeyBackupStateCheckingBackUpOnHomeserver:
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viewState = .loading
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case MXKeyBackupStateDisabled, MXKeyBackupStateEnabling:
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keyBackupState = .noKeyBackup
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case MXKeyBackupStateNotTrusted:
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guard let keyBackupVersion = self.keyBackup.keyBackupVersion, let keyBackupVersionTrust = keyBackupVersionTrust else {
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return
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}
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keyBackupState = .keyBackupNotTrusted(keyBackupVersion, keyBackupVersionTrust)
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case MXKeyBackupStateReadyToBackUp:
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guard let keyBackupVersion = self.keyBackup.keyBackupVersion, let keyBackupVersionTrust = keyBackupVersionTrust else {
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return
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}
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keyBackupState = .keyBackup(keyBackupVersion, keyBackupVersionTrust)
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case MXKeyBackupStateWillBackUp, MXKeyBackupStateBackingUp:
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guard let keyBackupVersion = self.keyBackup.keyBackupVersion, let keyBackupVersionTrust = keyBackupVersionTrust else {
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return
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}
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// Get the backup progress before updating the state
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self.keyBackup.backupProgress { [weak self] (progress) in
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guard let self = self else {
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return
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}
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let keyBackupState: SettingsSecureBackupViewState.KeyBackupState = .keyBackupAndRunning(keyBackupVersion, keyBackupVersionTrust, progress)
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let viewState: SettingsSecureBackupViewState = self.recoveryService.hasRecovery() ? .secureBackup(keyBackupState) : .noSecureBackup(keyBackupState)
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self.viewDelegate?.settingsSecureBackupViewModel(self, didUpdateViewState: viewState)
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}
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default:
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break
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}
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2021-06-16 10:25:01 +00:00
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2021-06-16 11:38:23 +00:00
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// Turn secure backup and key back states into view state
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if viewState == nil, let keyBackupState = keyBackupState {
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viewState = recoveryService.hasRecovery() ? .secureBackup(keyBackupState) : .noSecureBackup(keyBackupState)
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}
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2021-06-15 17:21:33 +00:00
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2021-06-16 10:25:01 +00:00
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if let viewState = viewState {
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self.viewDelegate?.settingsSecureBackupViewModel(self, didUpdateViewState: viewState)
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}
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}
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private func deleteKeyBackupVersion(_ keyBackupVersion: MXKeyBackupVersion) {
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guard let keyBackupVersionVersion = keyBackupVersion.version else {
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return
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}
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self.viewDelegate?.settingsSecureBackupViewModel(self, didUpdateNetworkRequestViewState: .loading)
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self.keyBackup.deleteVersion(keyBackupVersionVersion, success: { [weak self] () in
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guard let sself = self else {
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return
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}
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sself.viewDelegate?.settingsSecureBackupViewModel(sself, didUpdateNetworkRequestViewState: .loaded)
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}, failure: { [weak self] error in
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guard let sself = self else {
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return
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}
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sself.viewDelegate?.settingsSecureBackupViewModel(sself, didUpdateNetworkRequestViewState: .error(error))
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})
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}
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}
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