400 lines
15 KiB
Swift
400 lines
15 KiB
Swift
//
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// EditListAccountsViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 12/17/19.
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// Copyright © 2019 Shadowfacts. All rights reserved.
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//
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import UIKit
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import Pachyderm
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import Combine
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class EditListAccountsViewController: UIViewController, CollectionViewController {
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private var list: List
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private let mastodonController: MastodonController
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private var state = State.unloaded
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private(set) var changedAccounts = false
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private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
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var collectionView: UICollectionView! { view as? UICollectionView }
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private var nextRange: RequestRange?
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private var searchResultsController: SearchResultsViewController!
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private var searchController: UISearchController!
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private var listRenamedCancellable: AnyCancellable?
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init(list: List, mastodonController: MastodonController) {
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self.list = list
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self.mastodonController = mastodonController
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super.init(nibName: nil, bundle: nil)
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listChanged()
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listRenamedCancellable = mastodonController.$lists
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.compactMap { $0.first { $0.id == list.id } }
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.sink { [unowned self] in
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self.list = $0
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self.listChanged()
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}
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemeneted")
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}
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override func loadView() {
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var config = UICollectionLayoutListConfiguration(appearance: .grouped)
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config.itemSeparatorHandler = { [unowned self] indexPath, sectionConfig in
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var config = sectionConfig
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switch dataSource.itemIdentifier(for: indexPath)! {
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case .loadingIndicator:
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config.topSeparatorVisibility = .hidden
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config.bottomSeparatorVisibility = .hidden
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case .account(id: _):
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config.topSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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config.bottomSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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}
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return config
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}
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config.trailingSwipeActionsConfigurationProvider = { [unowned self] indexPath in
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switch dataSource.itemIdentifier(for: indexPath) {
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case .account(id: let id):
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let remove = UIContextualAction(style: .destructive, title: "Remove") { [unowned self] _, _, completion in
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Task {
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await self.removeAccount(id: id)
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completion(true)
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}
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}
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return UISwipeActionsConfiguration(actions: [remove])
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default:
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return nil
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}
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}
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let layout = UICollectionViewCompositionalLayout.list(using: config)
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view = UICollectionView(frame: .zero, collectionViewLayout: layout)
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collectionView.delegate = self
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collectionView.allowsSelection = false
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collectionView.backgroundColor = .appGroupedBackground
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dataSource = createDataSource()
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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searchResultsController = SearchResultsViewController(mastodonController: mastodonController, scope: .people)
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searchResultsController.following = true
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searchResultsController.delegate = self
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searchController = UISearchController(searchResultsController: searchResultsController)
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searchController.hidesNavigationBarDuringPresentation = false
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searchController.searchResultsUpdater = searchResultsController
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searchController.searchBar.autocapitalizationType = .none
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searchController.searchBar.placeholder = NSLocalizedString("Search accounts you follow", comment: "edit list search field placeholder")
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searchController.searchBar.delegate = searchResultsController
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definesPresentationContext = true
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navigationItem.searchController = searchController
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navigationItem.hidesSearchBarWhenScrolling = false
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if #available(iOS 16.0, *) {
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navigationItem.preferredSearchBarPlacement = .stacked
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navigationItem.renameDelegate = self
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navigationItem.titleMenuProvider = { [unowned self] suggested in
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var children = suggested
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children.append(contentsOf: self.listSettingsMenuElements())
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return UIMenu(children: children)
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}
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} else {
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navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Edit", menu: UIMenu(children: [
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// uncached so that menu always reflects the current state of the list
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UIDeferredMenuElement.uncached({ [unowned self] elementHandler in
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var elements = self.listSettingsMenuElements()
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elements.insert(UIAction(title: "Rename…", image: UIImage(systemName: "pencil"), handler: { [unowned self] _ in
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RenameListService(list: self.list, mastodonController: self.mastodonController, present: {
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self.present($0, animated: true)
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}).run()
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}), at: 0)
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elementHandler(elements)
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})
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]))
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}
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}
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private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
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let loadingCell = UICollectionView.CellRegistration<LoadingCollectionViewCell, Void> { cell, indexPath, itemIdentifier in
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cell.indicator.startAnimating()
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}
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let accountCell = UICollectionView.CellRegistration<AccountCollectionViewCell, String> { [unowned self] cell, indexPath, itemIdentifier in
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cell.delegate = self
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cell.updateUI(accountID: itemIdentifier)
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cell.configurationUpdateHandler = { cell, state in
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cell.backgroundConfiguration = .appListGroupedCell(for: state)
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}
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}
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return UICollectionViewDiffableDataSource(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
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switch itemIdentifier {
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case .loadingIndicator:
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return collectionView.dequeueConfiguredReusableCell(using: loadingCell, for: indexPath, item: ())
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case .account(id: let id):
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return collectionView.dequeueConfiguredReusableCell(using: accountCell, for: indexPath, item: id)
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}
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}
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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clearSelectionOnAppear(animated: animated)
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Task {
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await loadAccounts()
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}
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}
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private func listChanged() {
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title = list.title
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}
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private func listSettingsMenuElements() -> [UIMenuElement] {
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var elements = [UIMenuElement]()
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if mastodonController.instanceFeatures.listRepliesPolicy {
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let actions = List.ReplyPolicy.allCases.map { policy in
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UIAction(title: policy.actionTitle, state: list.replyPolicy == policy ? .on : .off) { [unowned self] _ in
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self.setReplyPolicy(policy)
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}
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}
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elements.append(UIMenu(title: "Show replies…", image: UIImage(systemName: "arrowshape.turn.up.left"), children: actions))
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}
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if mastodonController.instanceFeatures.exclusiveLists {
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let actions = [
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UIAction(title: "Hidden from Home", state: list.exclusive == true ? .on : .off) { [unowned self] _ in
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self.setExclusive(true)
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},
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UIAction(title: "Shown on Home", state: list.exclusive == false ? .on : .off) { [unowned self] _ in
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self.setExclusive(false)
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},
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]
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elements.append(UIMenu(title: "Posts from this list are…", children: actions))
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}
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return elements
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}
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@MainActor
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private func loadAccounts() async {
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guard state == .unloaded else { return }
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state = .loading
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async let results = try await mastodonController.run(List.getAccounts(list.id))
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.accounts])
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snapshot.appendItems([.loadingIndicator])
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await MainActor.run {
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dataSource.apply(snapshot)
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}
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do {
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let (accounts, pagination) = try await results
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self.nextRange = pagination?.older
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await withCheckedContinuation { continuation in
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mastodonController.persistentContainer.addAll(accounts: accounts) {
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continuation.resume()
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}
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}
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.accounts])
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snapshot.appendItems(accounts.map { .account(id: $0.id) })
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await MainActor.run {
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dataSource.apply(snapshot)
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}
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state = .loaded
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} catch {
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let config = ToastConfiguration(from: error, with: "Error Loading Accounts", in: self) { [unowned self] toast in
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toast.dismissToast(animated: true)
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await self.loadAccounts()
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}
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self.showToast(configuration: config, animated: true)
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state = .unloaded
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await MainActor.run {
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dataSource.apply(.init())
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}
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}
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}
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private func loadNextPage() async {
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guard state == .loaded,
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let nextRange else { return }
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state = .loading
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async let results = try await mastodonController.run(List.getAccounts(list.id, range: nextRange))
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let origSnapshot = dataSource.snapshot()
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var snapshot = origSnapshot
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snapshot.appendItems([.loadingIndicator])
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await MainActor.run {
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dataSource.apply(snapshot)
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}
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do {
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let (accounts, pagination) = try await results
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self.nextRange = pagination?.older
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await withCheckedContinuation { continuation in
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mastodonController.persistentContainer.addAll(accounts: accounts) {
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continuation.resume()
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}
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}
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var snapshot = origSnapshot
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snapshot.appendItems(accounts.map { .account(id: $0.id) })
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await MainActor.run {
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dataSource.apply(snapshot)
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}
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state = .loaded
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} catch {
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let config = ToastConfiguration(from: error, with: "Error Loading Accounts", in: self) { [unowned self] toast in
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toast.dismissToast(animated: true)
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await self.loadNextPage()
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}
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self.showToast(configuration: config, animated: true)
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state = .loaded
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await MainActor.run {
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dataSource.apply(origSnapshot)
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}
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}
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}
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private func addAccount(id: String) async {
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changedAccounts = true
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do {
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let req = List.add(list.id, accounts: [id])
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_ = try await mastodonController.run(req)
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self.searchController.isActive = false
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await self.loadAccounts()
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} catch {
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let config = ToastConfiguration(from: error, with: "Error Adding Account", in: self) { [unowned self] toast in
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toast.dismissToast(animated: true)
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await self.addAccount(id: id)
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}
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self.showToast(configuration: config, animated: true)
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}
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}
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private func removeAccount(id: String) async {
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changedAccounts = true
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do {
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let request = List.remove(list.id, accounts: [id])
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_ = try await mastodonController.run(request)
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await self.loadAccounts()
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} catch {
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let config = ToastConfiguration(from: error, with: "Error Removing Account", in: self) { [unowned self] toast in
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toast.dismissToast(animated: true)
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await self.removeAccount(id: id)
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}
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self.showToast(configuration: config, animated: true)
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}
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}
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private func setReplyPolicy(_ replyPolicy: List.ReplyPolicy) {
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Task {
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let service = EditListSettingsService(list: list, mastodonController: mastodonController, present: { self.present($0, animated: true) })
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await service.run(replyPolicy: replyPolicy)
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}
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}
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private func setExclusive(_ exclusive: Bool) {
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Task {
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let service = EditListSettingsService(list: list, mastodonController: mastodonController, present: { self.present($0, animated: true) })
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await service.run(exclusive: exclusive)
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}
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}
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}
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extension EditListAccountsViewController {
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enum State {
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case unloaded
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case loading
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case loaded
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case loadingOlder
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}
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}
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extension EditListAccountsViewController {
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enum Section: Hashable {
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case accounts
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}
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enum Item: Hashable {
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case loadingIndicator
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case account(id: String)
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}
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}
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extension EditListAccountsViewController: UICollectionViewDelegate {
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func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
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if state == .loaded,
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indexPath.item == collectionView.numberOfItems(inSection: indexPath.section) - 1 {
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Task {
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await loadNextPage()
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}
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}
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}
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}
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extension EditListAccountsViewController: TuskerNavigationDelegate {
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var apiController: MastodonController! { mastodonController }
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}
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extension EditListAccountsViewController: ToastableViewController {
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}
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extension EditListAccountsViewController: MenuActionProvider {
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}
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extension EditListAccountsViewController: SearchResultsViewControllerDelegate {
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func selectedSearchResult(account accountID: String) {
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Task {
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await addAccount(id: accountID)
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}
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}
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}
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extension EditListAccountsViewController: UINavigationItemRenameDelegate {
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func navigationItem(_: UINavigationItem, shouldEndRenamingWith title: String) -> Bool {
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!title.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
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}
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func navigationItem(_: UINavigationItem, didEndRenamingWith title: String) {
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Task {
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let service = EditListSettingsService(list: list, mastodonController: mastodonController, present: { self.present($0, animated: true) })
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await service.run(title: title)
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}
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}
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}
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private extension List.ReplyPolicy {
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var actionTitle: String {
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switch self {
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case .followed:
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"To accounts you follow"
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case .list:
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"To other list members"
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case .none:
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"Never"
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}
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}
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}
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