451 lines
19 KiB
Swift
451 lines
19 KiB
Swift
//
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// MastodonPickServerViewController.swift
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// Mastodon
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//
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// Created by BradGao on 2021/2/20.
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//
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import UIKit
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import Combine
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import GameController
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import AuthenticationServices
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import MastodonAsset
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import MastodonCore
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import MastodonLocalization
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import MastodonUI
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import MastodonSDK
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final class MastodonPickServerViewController: UIViewController, NeedsDependency {
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private var disposeBag = Set<AnyCancellable>()
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private var observations = Set<NSKeyValueObservation>()
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private var tableViewObservation: NSKeyValueObservation?
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weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
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weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
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var viewModel: MastodonPickServerViewModel!
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private(set) lazy var authenticationViewModel = AuthenticationViewModel(
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context: context,
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coordinator: coordinator,
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isAuthenticationExist: false
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)
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private var expandServerDomainSet = Set<String>()
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private let emptyStateView = PickServerEmptyStateView()
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private var emptyStateViewLeadingLayoutConstraint: NSLayoutConstraint!
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private var emptyStateViewTrailingLayoutConstraint: NSLayoutConstraint!
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let tableView: UITableView = {
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let tableView = ControlContainableTableView()
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tableView.rowHeight = UITableView.automaticDimension
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tableView.backgroundColor = .clear
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tableView.keyboardDismissMode = .onDrag
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tableView.sectionHeaderTopPadding = .leastNonzeroMagnitude
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return tableView
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}()
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let onboardingNextView: OnboardingNextView = {
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let onboardingNextView = OnboardingNextView()
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onboardingNextView.translatesAutoresizingMaskIntoConstraints = false
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onboardingNextView.backgroundColor = UIColor.secondarySystemBackground
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return onboardingNextView
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}()
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var mastodonAuthenticationController: MastodonAuthenticationController?
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let searchController: UISearchController = {
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let searchController = UISearchController(searchResultsController: nil)
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searchController.searchBar.placeholder = L10n.Scene.ServerPicker.Search.placeholder
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return searchController
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}()
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}
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extension MastodonPickServerViewController {
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override func viewDidLoad() {
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super.viewDidLoad()
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setupOnboardingAppearance()
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defer { setupNavigationBarBackgroundView() }
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tableView.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(tableView)
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NSLayoutConstraint.activate([
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tableView.topAnchor.constraint(equalTo: view.topAnchor),
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tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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tableView.bottomAnchor.constraint(equalTo: view.layoutMarginsGuide.bottomAnchor),
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])
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view.addSubview(onboardingNextView)
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NSLayoutConstraint.activate([
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onboardingNextView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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onboardingNextView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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view.bottomAnchor.constraint(equalTo: onboardingNextView.bottomAnchor),
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])
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onboardingNextView
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.observe(\.bounds, options: [.initial, .new]) { [weak self] _, _ in
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guard let self = self else { return }
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let inset = self.onboardingNextView.frame.height
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self.viewModel.additionalTableViewInsets.bottom = inset
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}
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.store(in: &observations)
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emptyStateView.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(emptyStateView)
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emptyStateViewLeadingLayoutConstraint = emptyStateView.leadingAnchor.constraint(equalTo: tableView.leadingAnchor)
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emptyStateViewTrailingLayoutConstraint = tableView.trailingAnchor.constraint(equalTo: emptyStateView.trailingAnchor)
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NSLayoutConstraint.activate([
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emptyStateView.topAnchor.constraint(equalTo: view.topAnchor),
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emptyStateViewLeadingLayoutConstraint,
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emptyStateViewTrailingLayoutConstraint,
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onboardingNextView.topAnchor.constraint(equalTo: emptyStateView.bottomAnchor, constant: 21),
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])
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view.sendSubviewToBack(emptyStateView)
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tableView.delegate = self
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viewModel.setupDiffableDataSource(
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for: tableView,
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dependency: self,
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pickServerServerSectionTableHeaderViewDelegate: self
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)
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KeyboardResponderService
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.configure(
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scrollView: tableView,
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layoutNeedsUpdate: viewModel.viewDidAppear.eraseToAnyPublisher(),
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additionalSafeAreaInsets: viewModel.$additionalTableViewInsets.eraseToAnyPublisher()
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)
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.store(in: &disposeBag)
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Publishers.Merge(
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viewModel.error,
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authenticationViewModel.error
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)
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.compactMap { $0 }
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.receive(on: DispatchQueue.main)
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.sink { [weak self] error in
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guard let self = self else { return }
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let alertController = UIAlertController(for: error, title: "Error", preferredStyle: .alert)
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let okAction = UIAlertAction(title: L10n.Common.Controls.Actions.ok, style: .default, handler: nil)
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alertController.addAction(okAction)
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_ = self.coordinator.present(
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scene: .alertController(alertController: alertController),
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from: nil,
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transition: .alertController(animated: true, completion: nil)
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)
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}
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.store(in: &disposeBag)
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viewModel.scrollToTop
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.receive(on: DispatchQueue.main)
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.sink { [weak self] _ in
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self?.tableView.scroll(to: .top, animated: false)
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}
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.store(in: &disposeBag)
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authenticationViewModel
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.authenticated
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.asyncMap { domain, user -> Result<Bool, Error> in
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do {
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let result = try await self.context.authenticationService.activeMastodonUser(domain: domain, userID: user.id)
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return .success(result)
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} catch {
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return .failure(error)
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}
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}
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.receive(on: DispatchQueue.main)
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.sink { [weak self] result in
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guard let self = self else { return }
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switch result {
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case .failure(let error):
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assertionFailure(error.localizedDescription)
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case .success(let isActived):
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assert(isActived)
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// self.dismiss(animated: true, completion: nil)
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self.coordinator.setup()
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}
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}
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.store(in: &disposeBag)
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authenticationViewModel.isAuthenticating
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.receive(on: DispatchQueue.main)
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.sink { [weak self] isAuthenticating in
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guard let self = self else { return }
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if isAuthenticating {
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self.onboardingNextView.showLoading()
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} else {
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self.onboardingNextView.stopLoading()
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}
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}
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.store(in: &disposeBag)
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viewModel.emptyStateViewState
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.receive(on: DispatchQueue.main)
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.sink { [weak self] state in
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guard let self = self else { return }
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switch state {
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case .none:
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UIView.animate(withDuration: 0.3) {
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self.emptyStateView.alpha = 0
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}
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case .loading:
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self.emptyStateView.alpha = 1
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self.emptyStateView.networkIndicatorImageView.isHidden = true
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self.emptyStateView.activityIndicatorView.startAnimating()
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self.emptyStateView.infoLabel.isHidden = false
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self.emptyStateView.infoLabel.text = L10n.Scene.ServerPicker.EmptyState.findingServers
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self.emptyStateView.infoLabel.textAlignment = self.traitCollection.layoutDirection == .rightToLeft ? .right : .left
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case .badNetwork:
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self.emptyStateView.alpha = 1
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self.emptyStateView.networkIndicatorImageView.isHidden = false
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self.emptyStateView.activityIndicatorView.stopAnimating()
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self.emptyStateView.infoLabel.isHidden = false
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self.emptyStateView.infoLabel.text = L10n.Scene.ServerPicker.EmptyState.badNetwork
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self.emptyStateView.infoLabel.textAlignment = .center
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}
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}
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.store(in: &disposeBag)
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onboardingNextView.nextButton.addTarget(self, action: #selector(MastodonPickServerViewController.next(_:)), for: .touchUpInside)
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viewModel.allLanguages
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.receive(on: DispatchQueue.main)
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.sink { [weak self] _ in
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guard let snapshot = self?.viewModel.serverSectionHeaderView.diffableDataSource?.snapshot() else { return }
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self?.viewModel.serverSectionHeaderView.diffableDataSource?.applySnapshotUsingReloadData(snapshot) {
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guard let self = self, let viewModel = self.viewModel else { return }
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guard let indexPath = viewModel.serverSectionHeaderView.diffableDataSource?.indexPath(for: .category(category: .init(category: Mastodon.Entity.Category.Kind.general.rawValue, serversCount: 0))) else { return }
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viewModel.serverSectionHeaderView.collectionView.selectItem(at: indexPath, animated: false, scrollPosition: .right)
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let firstIndex = IndexPath(item: 0, section: 0)
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viewModel.serverSectionHeaderView.collectionView.scrollToItem(at: firstIndex, at: .left, animated: false)
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}
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}
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.store(in: &disposeBag)
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title = L10n.Scene.ServerPicker.title
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navigationItem.searchController = searchController
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searchController.searchResultsUpdater = self
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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viewModel.viewWillAppear.send()
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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tableView.flashScrollIndicators()
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viewModel.viewDidAppear.send()
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}
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override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
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super.traitCollectionDidChange(previousTraitCollection)
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setupNavigationBarAppearance()
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}
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}
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extension MastodonPickServerViewController {
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@objc private func next(_ sender: UIButton) {
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let server: Mastodon.Entity.Server
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if let selectedServer = viewModel.selectedServer.value {
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server = selectedServer
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} else if let randomServer = viewModel.chooseRandomServer() {
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server = randomServer
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} else {
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return
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}
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authenticationViewModel.isAuthenticating.send(true)
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context.apiService.instance(domain: server.domain)
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.compactMap { [weak self] response -> AnyPublisher<MastodonPickServerViewModel.SignUpResponseFirst, Error>? in
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guard let self = self else { return nil }
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guard response.value.registrations != false else {
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return Fail(error: AuthenticationViewModel.AuthenticationError.registrationClosed).eraseToAnyPublisher()
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}
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return self.context.apiService.createApplication(domain: server.domain)
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.map { MastodonPickServerViewModel.SignUpResponseFirst(instance: response, application: $0) }
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.eraseToAnyPublisher()
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}
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.switchToLatest()
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.tryMap { response -> MastodonPickServerViewModel.SignUpResponseSecond in
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let application = response.application.value
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guard let authenticateInfo = AuthenticationViewModel.AuthenticateInfo(
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domain: server.domain,
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application: application
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) else {
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throw APIService.APIError.explicit(.badResponse)
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}
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return MastodonPickServerViewModel.SignUpResponseSecond(
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instance: response.instance,
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authenticateInfo: authenticateInfo
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)
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}
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.compactMap { [weak self] response -> AnyPublisher<MastodonPickServerViewModel.SignUpResponseThird, Error>? in
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guard let self = self else { return nil }
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let instance = response.instance
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let authenticateInfo = response.authenticateInfo
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return self.context.apiService.applicationAccessToken(
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domain: server.domain,
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clientID: authenticateInfo.clientID,
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clientSecret: authenticateInfo.clientSecret,
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redirectURI: authenticateInfo.redirectURI
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)
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.map {
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MastodonPickServerViewModel.SignUpResponseThird(
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instance: instance,
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authenticateInfo: authenticateInfo,
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applicationToken: $0
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)
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}
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.eraseToAnyPublisher()
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}
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.switchToLatest()
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.receive(on: DispatchQueue.main)
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.sink { [weak self] completion in
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guard let self = self else { return }
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self.authenticationViewModel.isAuthenticating.send(false)
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switch completion {
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case .failure(let error):
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self.viewModel.error.send(error)
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case .finished:
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break
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}
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} receiveValue: { [weak self] response in
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guard let self = self else { return }
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if let rules = response.instance.value.rules, !rules.isEmpty {
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// show server rules before register
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let mastodonServerRulesViewModel = MastodonServerRulesViewModel(
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domain: server.domain,
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authenticateInfo: response.authenticateInfo,
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rules: rules,
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instance: response.instance.value,
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applicationToken: response.applicationToken.value
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)
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_ = self.coordinator.present(scene: .mastodonServerRules(viewModel: mastodonServerRulesViewModel), from: self, transition: .show)
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} else {
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let mastodonRegisterViewModel = MastodonRegisterViewModel(
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context: self.context,
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domain: server.domain,
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authenticateInfo: response.authenticateInfo,
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instance: response.instance.value,
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applicationToken: response.applicationToken.value
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)
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_ = self.coordinator.present(scene: .mastodonRegister(viewModel: mastodonRegisterViewModel), from: nil, transition: .show)
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}
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}
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.store(in: &disposeBag)
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}
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}
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// MARK: - UITableViewDelegate
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extension MastodonPickServerViewController: UITableViewDelegate {
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func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
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guard let diffableDataSource = viewModel.diffableDataSource else { return nil }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return nil }
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guard case .server = item else { return nil }
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if tableView.indexPathForSelectedRow == indexPath {
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tableView.deselectRow(at: indexPath, animated: false)
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viewModel.selectedServer.send(nil)
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return nil
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}
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return indexPath
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}
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func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
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guard case let .server(server, _) = item else { return }
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tableView.selectRow(at: indexPath, animated: false, scrollPosition: .none)
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viewModel.selectedServer.send(server)
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// Briefly highlight selected cell
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guard let cell = tableView.cellForRow(at: indexPath) else { return }
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cell.backgroundColor = Asset.Colors.selectionHighlight.color
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UIView.animate(withDuration: 0.3, animations: {
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cell.backgroundColor = .none
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})
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}
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func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
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tableView.deselectRow(at: indexPath, animated: false)
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viewModel.selectedServer.send(nil)
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}
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func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
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guard let diffableDataSource = viewModel.diffableDataSource else { return nil }
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let snapshot = diffableDataSource.snapshot()
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guard section < snapshot.numberOfSections else { return nil }
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let section = snapshot.sectionIdentifiers[section]
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switch section {
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case .servers:
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return viewModel.serverSectionHeaderView
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default:
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return UIView()
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}
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}
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func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
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guard let diffableDataSource = viewModel.diffableDataSource else { return .leastNonzeroMagnitude }
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let snapshot = diffableDataSource.snapshot()
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guard section < snapshot.numberOfSections else { return .leastNonzeroMagnitude }
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let section = snapshot.sectionIdentifiers[section]
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switch section {
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case .servers:
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return PickServerServerSectionTableHeaderView.height
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default:
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return .leastNonzeroMagnitude
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}
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}
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}
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// MARK: - PickServerServerSectionTableHeaderViewDelegate
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extension MastodonPickServerViewController: PickServerServerSectionTableHeaderViewDelegate {
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func pickServerServerSectionTableHeaderView(_ headerView: PickServerServerSectionTableHeaderView, collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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guard let diffableDataSource = headerView.diffableDataSource,
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let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }
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switch item {
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case .category(_):
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viewModel.selectCategoryItem.value = item
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case .language(_), .signupSpeed(_):
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break
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// gets handled by button
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}
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}
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}
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// MARK: - OnboardingViewControllerAppearance
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extension MastodonPickServerViewController: OnboardingViewControllerAppearance { }
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// MARK: - UISearchResultsUpdating
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extension MastodonPickServerViewController: UISearchResultsUpdating {
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func updateSearchResults(for searchController: UISearchController) {
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guard let searchText = searchController.searchBar.text else { return }
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viewModel.searchText.send(searchText)
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}
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}
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