476 lines
19 KiB
Swift
476 lines
19 KiB
Swift
// Copyright © 2020 Metabolist. All rights reserved.
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import AVFoundation
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import Combine
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import Kingfisher
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import PhotosUI
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import SwiftUI
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import UniformTypeIdentifiers
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import ViewModels
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// swiftlint:disable file_length
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final class NewStatusViewController: UIViewController {
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private let viewModel: NewStatusViewModel
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private let scrollView = UIScrollView()
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private let stackView = UIStackView()
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private let activityIndicatorView = UIActivityIndicatorView(style: .large)
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private let postButton = UIBarButtonItem(
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title: nil,
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style: .done,
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target: nil,
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action: nil)
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private let mediaSelections = PassthroughSubject<[PHPickerResult], Never>()
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private let imagePickerResults = PassthroughSubject<[UIImagePickerController.InfoKey: Any]?, Never>()
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private let documentPickerResuls = PassthroughSubject<[URL]?, Never>()
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private var cancellables = Set<AnyCancellable>()
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init(viewModel: NewStatusViewModel) {
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self.viewModel = viewModel
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super.init(nibName: nil, bundle: nil)
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NotificationCenter.default.publisher(for: UIResponder.keyboardDidChangeFrameNotification)
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.merge(with: NotificationCenter.default.publisher(for: UIResponder.keyboardWillHideNotification))
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.sink { [weak self] in self?.adjustContentInset(notification: $0) }
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.store(in: &cancellables)
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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// swiftlint:disable:next function_body_length
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override func viewDidLoad() {
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super.viewDidLoad()
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view.backgroundColor = .systemBackground
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view.addSubview(scrollView)
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scrollView.translatesAutoresizingMaskIntoConstraints = false
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scrollView.addSubview(stackView)
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stackView.translatesAutoresizingMaskIntoConstraints = false
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stackView.axis = .vertical
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stackView.distribution = .equalSpacing
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scrollView.addSubview(activityIndicatorView)
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activityIndicatorView.translatesAutoresizingMaskIntoConstraints = false
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activityIndicatorView.hidesWhenStopped = true
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NSLayoutConstraint.activate([
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scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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scrollView.topAnchor.constraint(equalTo: view.topAnchor),
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scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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stackView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor),
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stackView.topAnchor.constraint(equalTo: scrollView.topAnchor),
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stackView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor),
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stackView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor),
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stackView.widthAnchor.constraint(equalTo: scrollView.widthAnchor),
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activityIndicatorView.centerXAnchor.constraint(equalTo: scrollView.centerXAnchor),
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activityIndicatorView.centerYAnchor.constraint(equalTo: scrollView.centerYAnchor)
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])
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navigationItem.leftBarButtonItem = UIBarButtonItem(
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systemItem: .cancel,
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primaryAction: UIAction { [weak self] _ in self?.dismiss() })
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navigationItem.rightBarButtonItem = postButton
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let postActionTitle: String
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switch viewModel.identityContext.appPreferences.statusWord {
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case .toot:
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postActionTitle = NSLocalizedString("toot", comment: "")
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case .post:
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postActionTitle = NSLocalizedString("post", comment: "")
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}
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postButton.primaryAction = UIAction(title: postActionTitle) { [weak self] _ in
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self?.viewModel.post()
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}
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#if !IS_SHARE_EXTENSION
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if let inReplyToViewModel = viewModel.inReplyToViewModel {
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let statusView = StatusView(configuration: .init(viewModel: inReplyToViewModel))
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statusView.isUserInteractionEnabled = false
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statusView.bodyView.alpha = 0.5
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statusView.buttonsStackView.isHidden = true
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stackView.addArrangedSubview(statusView)
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}
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#endif
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setupViewModelBindings()
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}
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}
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extension NewStatusViewController {
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static let newStatusPostedNotification = Notification.Name("com.metabolist.metatext.new-status-posted-notification")
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}
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extension NewStatusViewController: PHPickerViewControllerDelegate {
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func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
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mediaSelections.send(results)
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dismiss(animated: true)
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}
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}
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extension NewStatusViewController: UIImagePickerControllerDelegate {
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func imagePickerController(_ picker: UIImagePickerController,
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didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
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imagePickerResults.send(info)
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dismiss(animated: true)
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}
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func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
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imagePickerResults.send(nil)
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dismiss(animated: true)
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}
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}
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extension NewStatusViewController: UIDocumentPickerDelegate {
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func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
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documentPickerResuls.send(urls)
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}
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func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
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documentPickerResuls.send(nil)
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}
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}
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extension NewStatusViewController: UIPopoverPresentationControllerDelegate {
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func adaptivePresentationStyle(for controller: UIPresentationController,
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traitCollection: UITraitCollection) -> UIModalPresentationStyle {
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.none
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}
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}
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// Required by UIImagePickerController
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extension NewStatusViewController: UINavigationControllerDelegate {}
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private extension NewStatusViewController {
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func handle(event: NewStatusViewModel.Event) {
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switch event {
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case let .presentMediaPicker(compositionViewModel):
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presentMediaPicker(compositionViewModel: compositionViewModel)
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case let .presentCamera(compositionViewModel):
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#if !IS_SHARE_EXTENSION
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presentCamera(compositionViewModel: compositionViewModel)
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#endif
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case let .presentDocumentPicker(compositionViewModel):
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presentDocumentPicker(compositionViewModel: compositionViewModel)
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case let .presentEmojiPicker(tag):
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presentEmojiPicker(tag: tag)
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case let .editAttachment(attachmentViewModel, compositionViewModel):
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presentAttachmentEditor(
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attachmentViewModel: attachmentViewModel,
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compositionViewModel: compositionViewModel)
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case let .changeIdentity(identity):
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changeIdentity(identity)
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}
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}
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func apply(postingState: NewStatusViewModel.PostingState) {
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switch postingState {
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case .composing:
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activityIndicatorView.stopAnimating()
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stackView.isUserInteractionEnabled = true
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stackView.alpha = 1
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case .posting:
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activityIndicatorView.startAnimating()
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stackView.isUserInteractionEnabled = false
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stackView.alpha = 0.5
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case .done:
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NotificationCenter.default.post(.init(name: Self.newStatusPostedNotification))
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dismiss()
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}
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}
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func set(compositionViewModels: [CompositionViewModel]) {
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let diff = compositionViewModels.map(\.id)
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.difference(from: stackView.arrangedSubviews.compactMap { ($0 as? CompositionView)?.id })
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for insertion in diff.insertions {
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guard case let .insert(index, id, _) = insertion,
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let compositionViewModel = compositionViewModels.first(where: { $0.id == id })
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else { continue }
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let compositionView = CompositionView(
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viewModel: compositionViewModel,
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parentViewModel: viewModel)
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let adjustedIndex = viewModel.inReplyToViewModel == nil ? index : index + 1
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stackView.insertArrangedSubview(compositionView, at: adjustedIndex)
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compositionView.textView.becomeFirstResponder()
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DispatchQueue.main.async {
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self.scrollView.scrollRectToVisible(
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self.scrollView.convert(compositionView.frame, from: self.stackView),
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animated: true)
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}
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}
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for removal in diff.removals {
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guard case let .remove(_, id, _) = removal,
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let index = stackView.arrangedSubviews.firstIndex(where: { ($0 as? CompositionView)?.id == id })
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else { continue }
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if (stackView.arrangedSubviews[index] as? CompositionView)?.textView.isFirstResponder ?? false {
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if index > 0 {
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(stackView.arrangedSubviews[index - 1] as? CompositionView)?.textView.becomeFirstResponder()
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} else if stackView.arrangedSubviews.count > index {
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(stackView.arrangedSubviews[index + 1] as? CompositionView)?.textView.becomeFirstResponder()
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}
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}
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stackView.arrangedSubviews[index].removeFromSuperview()
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}
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for compositionView in stackView.arrangedSubviews.compactMap({ $0 as? CompositionView }) {
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compositionView.removeButton.isHidden = compositionViewModels.count == 1
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compositionView.inReplyToView.isHidden = compositionView === stackView.arrangedSubviews.first
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&& viewModel.inReplyToViewModel == nil
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compositionView.hasReplyFollowingView.isHidden = compositionView === stackView.arrangedSubviews.last
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}
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}
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func dismiss() {
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if let extensionContext = extensionContext {
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extensionContext.completeRequest(returningItems: nil)
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} else {
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presentingViewController?.dismiss(animated: true)
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}
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}
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func setupViewModelBindings() {
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viewModel.events
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.sink { [weak self] in self?.handle(event: $0) }
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.store(in: &cancellables)
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viewModel.$canPost
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.sink { [weak self] in self?.postButton.isEnabled = $0 }
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.store(in: &cancellables)
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viewModel.$compositionViewModels
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.sink { [weak self] in self?.set(compositionViewModels: $0) }
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.store(in: &cancellables)
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viewModel.$postingState
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.sink { [weak self] in self?.apply(postingState: $0) }
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.store(in: &cancellables)
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viewModel.$alertItem
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.compactMap { $0 }
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.sink { [weak self] alertItem in
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self?.dismissEmojiPickerIfPresented {
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self?.present(alertItem: alertItem)
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}
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}
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.store(in: &cancellables)
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}
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func presentMediaPicker(compositionViewModel: CompositionViewModel) {
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mediaSelections.first().sink { [weak self] results in
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guard let self = self, let result = results.first else { return }
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self.viewModel.attach(itemProvider: result.itemProvider, to: compositionViewModel)
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}
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.store(in: &cancellables)
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var configuration = PHPickerConfiguration()
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configuration.preferredAssetRepresentationMode = .current
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if !compositionViewModel.canAddNonImageAttachment {
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configuration.filter = .images
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}
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let picker = PHPickerViewController(configuration: configuration)
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picker.modalPresentationStyle = .overFullScreen
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picker.delegate = self
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dismissEmojiPickerIfPresented {
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self.present(picker, animated: true)
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}
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}
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#if !IS_SHARE_EXTENSION
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func presentCamera(compositionViewModel: CompositionViewModel) {
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if AVCaptureDevice.authorizationStatus(for: .video) == .denied {
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let alertController = UIAlertController(
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title: NSLocalizedString("camera-access.title", comment: ""),
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message: NSLocalizedString("camera-access.description", comment: ""),
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preferredStyle: .alert)
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let openSystemSettingsAction = UIAlertAction(
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title: NSLocalizedString("camera-access.open-system-settings", comment: ""),
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style: .default) { _ in
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guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else { return }
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UIApplication.shared.open(settingsUrl)
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}
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let cancelAction = UIAlertAction(title: NSLocalizedString("cancel", comment: ""), style: .cancel) { _ in }
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alertController.addAction(openSystemSettingsAction)
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alertController.addAction(cancelAction)
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present(alertController, animated: true)
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return
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}
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imagePickerResults.first().sink { [weak self] in
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guard let self = self, let info = $0 else { return }
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if let url = info[.mediaURL] as? URL, let itemProvider = NSItemProvider(contentsOf: url) {
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self.viewModel.attach(itemProvider: itemProvider, to: compositionViewModel)
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} else if let image = info[.editedImage] as? UIImage ?? info[.originalImage] as? UIImage {
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self.viewModel.attach(itemProvider: NSItemProvider(object: image), to: compositionViewModel)
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}
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}
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.store(in: &cancellables)
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let picker = UIImagePickerController()
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picker.sourceType = .camera
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picker.allowsEditing = true
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picker.modalPresentationStyle = .overFullScreen
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picker.delegate = self
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if compositionViewModel.canAddNonImageAttachment {
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picker.mediaTypes = [UTType.image.description, UTType.movie.description]
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} else {
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picker.mediaTypes = [UTType.image.description]
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}
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dismissEmojiPickerIfPresented {
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self.present(picker, animated: true)
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}
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}
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#endif
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func presentDocumentPicker(compositionViewModel: CompositionViewModel) {
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documentPickerResuls.first().sink { [weak self] in
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guard let self = self,
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let result = $0?.first,
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result.startAccessingSecurityScopedResource(),
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let itemProvider = NSItemProvider(contentsOf: result)
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else { return }
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self.viewModel.attach(itemProvider: itemProvider, to: compositionViewModel)
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result.stopAccessingSecurityScopedResource()
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}
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.store(in: &cancellables)
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let documentPickerController = UIDocumentPickerViewController(forOpeningContentTypes: [.image, .movie, .audio])
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documentPickerController.delegate = self
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documentPickerController.allowsMultipleSelection = false
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documentPickerController.modalPresentationStyle = .overFullScreen
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dismissEmojiPickerIfPresented {
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self.present(documentPickerController, animated: true)
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}
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}
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func presentEmojiPicker(tag: Int) {
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if dismissEmojiPickerIfPresented() {
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return
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}
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guard let fromView = view.viewWithTag(tag) else { return }
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let emojiPickerViewModel = EmojiPickerViewModel(identityContext: viewModel.identityContext)
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emojiPickerViewModel.$alertItem.assign(to: \.alertItem, on: viewModel).store(in: &cancellables)
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let emojiPickerController = EmojiPickerViewController(viewModel: emojiPickerViewModel) {
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guard let textInput = fromView as? UITextInput else { return }
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if let selectedTextRange = textInput.selectedTextRange {
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textInput.replace(selectedTextRange, withText: $0.escaped.appending(" "))
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}
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} dismissAction: {
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fromView.becomeFirstResponder()
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}
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emojiPickerController.searchBar.inputAccessoryView = fromView.inputAccessoryView
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emojiPickerController.preferredContentSize = .init(
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width: view.readableContentGuide.layoutFrame.width,
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height: view.frame.height)
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emojiPickerController.modalPresentationStyle = .popover
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emojiPickerController.popoverPresentationController?.delegate = self
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emojiPickerController.popoverPresentationController?.sourceView = fromView
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emojiPickerController.popoverPresentationController?.sourceRect = fromView.bounds
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emojiPickerController.popoverPresentationController?.backgroundColor = .clear
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present(emojiPickerController, animated: true)
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}
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@discardableResult
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func dismissEmojiPickerIfPresented(completion: (() -> Void)? = nil) -> Bool {
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let emojiPickerPresented = presentedViewController is EmojiPickerViewController
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if emojiPickerPresented {
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dismiss(animated: true, completion: completion)
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} else {
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completion?()
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}
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return emojiPickerPresented
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}
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func presentAttachmentEditor(attachmentViewModel: AttachmentViewModel, compositionViewModel: CompositionViewModel) {
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let editAttachmentsView = EditAttachmentView { (attachmentViewModel, compositionViewModel) }
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let editAttachmentViewController = UIHostingController(rootView: editAttachmentsView)
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let navigationController = UINavigationController(rootViewController: editAttachmentViewController)
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navigationController.modalPresentationStyle = .overFullScreen
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dismissEmojiPickerIfPresented {
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self.present(navigationController, animated: true)
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}
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}
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func changeIdentity(_ identity: Identity) {
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if viewModel.compositionViewModels.contains(where: { !$0.attachmentViewModels.isEmpty }) {
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let alertController = UIAlertController(
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title: nil,
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message: NSLocalizedString("compose.attachments-will-be-discarded", comment: ""),
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preferredStyle: .alert)
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let okAction = UIAlertAction(
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title: NSLocalizedString("ok", comment: ""),
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style: .destructive) { [weak self] _ in
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guard let self = self else { return }
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for compositionViewModel in self.viewModel.compositionViewModels {
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compositionViewModel.discardAttachments()
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}
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self.viewModel.setIdentity(identity)
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}
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let cancelAction = UIAlertAction(title: NSLocalizedString("cancel", comment: ""), style: .cancel) { _ in }
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alertController.addAction(okAction)
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alertController.addAction(cancelAction)
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present(alertController, animated: true)
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} else {
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viewModel.setIdentity(identity)
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}
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}
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func adjustContentInset(notification: Notification) {
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guard let keyboardFrameEnd = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect
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else { return }
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let convertedFrame = self.view.convert(keyboardFrameEnd, from: view.window)
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let contentInsetBottom: CGFloat
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if notification.name == UIResponder.keyboardWillHideNotification {
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contentInsetBottom = 0
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} else {
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contentInsetBottom = convertedFrame.height - view.safeAreaInsets.bottom
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}
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self.scrollView.contentInset.bottom = contentInsetBottom
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self.scrollView.verticalScrollIndicatorInsets.bottom = contentInsetBottom
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}
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}
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// swiftlint:enable file_length
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