138 lines
4.5 KiB
Swift
138 lines
4.5 KiB
Swift
/*
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Copyright 2019-2024 New Vector Ltd.
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SPDX-License-Identifier: AGPL-3.0-only
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Please see LICENSE in the repository root for full details.
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*/
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import Foundation
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final class EncryptionKeysExportPresenter: NSObject {
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// MARK: - Constants
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private enum Constants {
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static let keyExportFileName = "element-keys.txt"
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}
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// MARK: - Properties
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// MARK: Private
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private let session: MXSession
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private let activityViewPresenter: ActivityIndicatorPresenterType
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private let keyExportFileURL: URL
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private weak var presentingViewController: UIViewController?
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private weak var sourceView: UIView?
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private var encryptionKeysExportView: MXKEncryptionKeysExportView?
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private var documentInteractionController: UIDocumentInteractionController?
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// MARK: Public
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// MARK: - Setup
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init(session: MXSession) {
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self.session = session
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self.activityViewPresenter = ActivityIndicatorPresenter()
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self.keyExportFileURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(Constants.keyExportFileName)
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super.init()
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}
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deinit {
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self.deleteKeyExportFile()
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}
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// MARK: - Public
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func present(from viewController: UIViewController, sourceView: UIView?) {
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self.presentingViewController = viewController
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self.sourceView = sourceView
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let keysExportView: MXKEncryptionKeysExportView = MXKEncryptionKeysExportView(matrixSession: self.session)
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// Make sure the file is empty
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self.deleteKeyExportFile()
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keysExportView.show(in: viewController,
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toExportKeysToFile: self.keyExportFileURL,
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onLoading: { [weak self] (loading) in
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guard let self = self else {
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return
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}
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if loading {
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self.activityViewPresenter.presentActivityIndicator(on: viewController.view, animated: true)
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} else {
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self.activityViewPresenter.removeCurrentActivityIndicator(animated: true)
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}
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}, onComplete: { [weak self] (success) in
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guard let self = self else {
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return
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}
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guard success else {
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self.encryptionKeysExportView = nil
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return
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}
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self.presentInteractionDocumentController()
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})
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self.encryptionKeysExportView = keysExportView
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}
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// MARK: - Private
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private func presentInteractionDocumentController() {
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let sourceRect: CGRect
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guard let presentingView = self.presentingViewController?.view else {
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self.encryptionKeysExportView = nil
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return
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}
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if let sourceView = self.sourceView {
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sourceRect = sourceView.convert(sourceView.bounds, to: presentingView)
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} else {
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sourceRect = presentingView.bounds
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}
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let documentInteractionController = UIDocumentInteractionController(url: self.keyExportFileURL)
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documentInteractionController.delegate = self
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if documentInteractionController.presentOptionsMenu(from: sourceRect, in: presentingView, animated: true) {
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self.documentInteractionController = documentInteractionController
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} else {
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self.encryptionKeysExportView = nil
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self.deleteKeyExportFile()
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}
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}
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@objc private func deleteKeyExportFile() {
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let fileManager = FileManager.default
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if fileManager.fileExists(atPath: self.keyExportFileURL.path) {
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try? fileManager.removeItem(atPath: self.keyExportFileURL.path)
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}
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}
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}
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// MARK: - UIDocumentInteractionControllerDelegate
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extension EncryptionKeysExportPresenter: UIDocumentInteractionControllerDelegate {
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// Note: This method is not called in all cases (see http://stackoverflow.com/a/21867096).
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func documentInteractionController(_ controller: UIDocumentInteractionController, didEndSendingToApplication application: String?) {
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self.deleteKeyExportFile()
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self.documentInteractionController = nil
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}
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func documentInteractionControllerDidDismissOptionsMenu(_ controller: UIDocumentInteractionController) {
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self.encryptionKeysExportView = nil
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self.documentInteractionController = nil
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}
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}
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