Create key backup recover from passphrase scene with coordinator, view model, view controller

2026-04-19 08:03:50 +02:00 · 2019-01-30 10:52:15 +01:00
parent 4997b710cc
commit 23cd754019
8 changed files with 733 additions and 0 deletions
@@ -0,0 +1,105 @@
+/*
+ Copyright 2019 New Vector Ltd
+ 
+ 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
+
+enum KeyBackupRecoverFromPassphraseViewModelError: Error {
+    case missingKeyBackupVersion
+}
+
+final class KeyBackupRecoverFromPassphraseViewModel: KeyBackupRecoverFromPassphraseViewModelType {
+    
+    // MARK: - Properties
+    
+    // MARK: Private
+    
+    private let keyBackup: MXKeyBackup
+    private var currentHTTPOperation: MXHTTPOperation?
+    private let keyBackupVersion: MXKeyBackupVersion
+    
+    // MARK: Public
+    
+    var passphrase: String?
+    
+    var isFormValid: Bool {
+        return self.passphrase?.isEmpty == false
+    }
+    
+    weak var viewDelegate: KeyBackupRecoverFromPassphraseViewModelViewDelegate?
+    weak var coordinatorDelegate: KeyBackupRecoverFromPassphraseViewModelCoordinatorDelegate?
+    
+    // MARK: - Setup
+    
+    init(keyBackup: MXKeyBackup, keyBackupVersion: MXKeyBackupVersion) {
+        self.keyBackup = keyBackup
+        self.keyBackupVersion = keyBackupVersion
+    }
+    
+    deinit {
+        self.currentHTTPOperation?.cancel()
+    }
+    
+    // MARK: - Public
+    
+    func process(viewAction: KeyBackupRecoverFromPassphraseViewAction) {
+        switch viewAction {
+        case .recover:
+            self.recoverWithPassphrase()
+        case .cancel:
+            self.coordinatorDelegate?.keyBackupRecoverFromPassphraseViewModelDidCancel(self)
+        case .unknownPassphrase:
+            self.coordinatorDelegate?.keyBackupRecoverFromPassphraseViewModelDoNotKnowPassphrase(self)
+        }
+    }
+    
+    // MARK: - Private
+    
+    private func recoverWithPassphrase() {
+        guard let passphrase = self.passphrase else {
+            return
+        }
+        
+        guard let keyBackupVersion = self.keyBackupVersion.version else {
+            self.update(viewState: .error(KeyBackupRecoverFromPassphraseViewModelError.missingKeyBackupVersion))
+            return
+        }
+        
+        self.update(viewState: .loading)
+        
+        self.currentHTTPOperation = self.keyBackup.restore(keyBackupVersion, withPassword: passphrase, room: nil, session: nil, success: { [weak self] (totalKeys, _) in
+            guard let sself = self else {
+                return
+            }
+            sself.update(viewState: .loaded(totalKeys: totalKeys))
+            if totalKeys > 0 {
+                DispatchQueue.main.async {
+                    sself.coordinatorDelegate?.keyBackupRecoverFromPassphraseViewModelDidRecover(sself)
+                }
+            }
+        }, failure: { [weak self] error in
+            guard let sself = self else {
+                return
+            }
+            DispatchQueue.main.async {
+                sself.update(viewState: .error(error))
+            }
+        })
+    }
+    
+    private func update(viewState: KeyBackupRecoverFromPassphraseViewState) {
+        self.viewDelegate?.keyBackupRecoverFromPassphraseViewModel(self, didUpdateViewState: viewState)
+    }
+}