505 lines
21 KiB
Swift
505 lines
21 KiB
Swift
//
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// ExploreViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 12/14/19.
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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 Combine
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import Pachyderm
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class ExploreViewController: UIViewController, UICollectionViewDelegate {
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weak var mastodonController: MastodonController!
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private var collectionView: UICollectionView!
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private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
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private(set) var resultsController: SearchResultsViewController!
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private(set) var searchController: UISearchController!
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var searchControllerStatusOnAppearance: Bool? = nil
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init(mastodonController: MastodonController) {
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self.mastodonController = mastodonController
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super.init(nibName: nil, bundle: nil)
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title = NSLocalizedString("Explore", comment: "explore tab title")
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tabBarItem.image = UIImage(systemName: "magnifyingglass")
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}
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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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override func viewDidLoad() {
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super.viewDidLoad()
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var configuration = UICollectionLayoutListConfiguration(appearance: .insetGrouped)
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configuration.trailingSwipeActionsConfigurationProvider = self.trailingSwipeActionsForCell(at:)
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configuration.headerMode = .supplementary
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let layout = UICollectionViewCompositionalLayout.list(using: configuration)
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collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
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collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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collectionView.delegate = self
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collectionView.dragDelegate = self
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view.addSubview(collectionView)
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dataSource = createDataSource()
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applyInitialSnapshot()
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if mastodonController.instance == nil {
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mastodonController.getOwnInstance(completion: self.ownInstanceLoaded(_:))
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}
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resultsController = SearchResultsViewController(mastodonController: mastodonController)
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resultsController.exploreNavigationController = self.navigationController!
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searchController = UISearchController(searchResultsController: resultsController)
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searchController.searchResultsUpdater = resultsController
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searchController.searchBar.autocapitalizationType = .none
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searchController.searchBar.delegate = resultsController
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definesPresentationContext = true
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navigationItem.searchController = searchController
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navigationItem.hidesSearchBarWhenScrolling = false
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NotificationCenter.default.addObserver(self, selector: #selector(savedHashtagsChanged), name: .savedHashtagsChanged, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(savedInstancesChanged), name: .savedInstancesChanged, object: nil)
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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// Can't use UICollectionViewController's builtin version of this because it requires
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// the collection view layout be passed into the constructor. Swipe actions for list collection views
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// are created by passing a closure to the layout's configuration. This closure needs to capture
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// `self`, so it can't be passed into the super constructor.
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if let indexPaths = collectionView.indexPathsForSelectedItems {
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for indexPath in indexPaths {
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collectionView.deselectItem(at: indexPath, animated: true)
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}
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}
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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// this is a workaround for the issue that setting isActive on a search controller that is not visible
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// does not cause it to automatically become active once it becomes visible
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// see FB7814561
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if let active = searchControllerStatusOnAppearance {
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searchController.isActive = active
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searchControllerStatusOnAppearance = nil
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}
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}
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private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
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let sectionHeaderCell = UICollectionView.SupplementaryRegistration<UICollectionViewListCell>(elementKind: UICollectionView.elementKindSectionHeader) { (headerView, collectionView, indexPath) in
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let section = self.dataSource.snapshot().sectionIdentifiers[indexPath.section]
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var config = headerView.defaultContentConfiguration()
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config.text = section.label
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headerView.contentConfiguration = config
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}
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let listCell = UICollectionView.CellRegistration<UICollectionViewListCell, Item> { (cell, indexPath, item) in
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var config = cell.defaultContentConfiguration()
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config.text = item.label
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config.image = item.image
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cell.contentConfiguration = config
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switch item {
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case .addList, .addSavedHashtag, .findInstance:
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cell.accessories = []
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default:
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cell.accessories = [.disclosureIndicator()]
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}
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}
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let dataSource = UICollectionViewDiffableDataSource<Section, Item>(collectionView: collectionView) { (collectionView, indexPath, item) in
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return collectionView.dequeueConfiguredReusableCell(using: listCell, for: indexPath, item: item)
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}
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dataSource.supplementaryViewProvider = { (collectionView, elementKind, indexPath) in
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if elementKind == UICollectionView.elementKindSectionHeader {
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return collectionView.dequeueConfiguredReusableSupplementary(using: sectionHeaderCell, for: indexPath)
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} else {
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return nil
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}
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}
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return dataSource
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}
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private func applyInitialSnapshot() {
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let account = mastodonController.accountInfo!
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections(Section.allCases.filter { $0 != .discover })
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snapshot.appendItems([.bookmarks], toSection: .bookmarks)
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if case .mastodon = mastodonController.instance?.instanceType {
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snapshot.insertSections([.discover], afterSection: .bookmarks)
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snapshot.appendItems([.trendingTags, .profileDirectory], toSection: .discover)
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}
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snapshot.appendItems([.addList], toSection: .lists)
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snapshot.appendItems(SavedDataManager.shared.sortedHashtags(for: account).map { .savedHashtag($0) }, toSection: .savedHashtags)
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snapshot.appendItems([.addSavedHashtag], toSection: .savedHashtags)
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snapshot.appendItems(SavedDataManager.shared.savedInstances(for: account).map { .savedInstance($0) }, toSection: .savedInstances)
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snapshot.appendItems([.findInstance], toSection: .savedInstances)
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dataSource.apply(snapshot, animatingDifferences: false)
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reloadLists()
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}
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private func ownInstanceLoaded(_ instance: Instance) {
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var snapshot = self.dataSource.snapshot()
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if case .mastodon = instance.instanceType {
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snapshot.insertSections([.discover], afterSection: .bookmarks)
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snapshot.appendItems([.trendingTags, .profileDirectory], toSection: .discover)
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}
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self.dataSource.apply(snapshot)
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}
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private func reloadLists() {
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let request = Client.getLists()
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mastodonController.run(request) { (response) in
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guard case let .success(lists, _) = response else {
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return
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}
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var snapshot = self.dataSource.snapshot()
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snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .lists))
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snapshot.appendItems(lists.map { .list($0) }, toSection: .lists)
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snapshot.appendItems([.addList], toSection: .lists)
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DispatchQueue.main.async {
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self.dataSource.apply(snapshot)
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}
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}
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}
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@objc private func savedHashtagsChanged() {
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let account = mastodonController.accountInfo!
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var snapshot = dataSource.snapshot()
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snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .savedHashtags))
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snapshot.appendItems(SavedDataManager.shared.sortedHashtags(for: account).map { .savedHashtag($0) }, toSection: .savedHashtags)
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snapshot.appendItems([.addSavedHashtag], toSection: .savedHashtags)
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dataSource.apply(snapshot)
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}
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@objc private func savedInstancesChanged() {
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let account = mastodonController.accountInfo!
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var snapshot = dataSource.snapshot()
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snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .savedInstances))
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snapshot.appendItems(SavedDataManager.shared.savedInstances(for: account).map { .savedInstance($0) }, toSection: .savedInstances)
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snapshot.appendItems([.findInstance], toSection: .savedInstances)
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dataSource.apply(snapshot)
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}
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private func deleteList(_ list: List, completion: @escaping (Bool) -> Void) {
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let titleFormat = NSLocalizedString("Are you sure you want to delete the '%@' list?", comment: "delete list alert title")
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let title = String(format: titleFormat, list.title)
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let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
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alert.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "delete list alert cancel button"), style: .cancel, handler: { (_) in
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completion(false)
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}))
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alert.addAction(UIAlertAction(title: NSLocalizedString("Delete List", comment: "delete list alert confirm button"), style: .destructive, handler: { (_) in
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let request = List.delete(list)
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self.mastodonController.run(request) { (response) in
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guard case .success(_, _) = response else {
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fatalError()
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}
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var snapshot = self.dataSource.snapshot()
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snapshot.deleteItems([.list(list)])
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DispatchQueue.main.async {
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self.dataSource.apply(snapshot)
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completion(true)
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}
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}
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}))
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present(alert, animated: true)
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}
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func removeSavedHashtag(_ hashtag: Hashtag) {
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let account = mastodonController.accountInfo!
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SavedDataManager.shared.remove(hashtag: hashtag, for: account)
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}
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func removeSavedInstance(_ instanceURL: URL) {
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let account = mastodonController.accountInfo!
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SavedDataManager.shared.remove(instance: instanceURL, for: account)
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}
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private func trailingSwipeActionsForCell(at indexPath: IndexPath) -> UISwipeActionsConfiguration? {
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let handler: UIContextualAction.Handler
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switch dataSource.itemIdentifier(for: indexPath) {
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case let .list(list):
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handler = { (_, _, completion) in
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self.deleteList(list, completion: completion)
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}
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case let .savedHashtag(hashtag):
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handler = { (_, _, completion) in
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self.removeSavedHashtag(hashtag)
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completion(true)
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}
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case let .savedInstance(url):
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handler = { (_, _, completion) in
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self.removeSavedInstance(url)
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completion(true)
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}
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default:
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return nil
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}
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return UISwipeActionsConfiguration(actions: [
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UIContextualAction(style: .destructive, title: NSLocalizedString("Delete", comment: "delete swipe action title"), handler: handler)
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])
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}
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// MARK: - Collection View Delegate
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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switch dataSource.itemIdentifier(for: indexPath) {
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case nil:
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return
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case .bookmarks:
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show(BookmarksTableViewController(mastodonController: mastodonController), sender: nil)
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case .trendingTags:
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show(TrendingHashtagsViewController(mastodonController: mastodonController), sender: nil)
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case .profileDirectory:
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show(ProfileDirectoryViewController(mastodonController: mastodonController), sender: nil)
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case let .list(list):
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show(ListTimelineViewController(for: list, mastodonController: mastodonController), sender: nil)
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case .addList:
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collectionView.deselectItem(at: indexPath, animated: true)
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let alert = UIAlertController(title: NSLocalizedString("New List", comment: "new list alert title"), message: NSLocalizedString("Choose a title for your new list", comment: "new list alert message"), preferredStyle: .alert)
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alert.addTextField(configurationHandler: nil)
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alert.addAction(UIAlertAction(title: NSLocalizedString("Cancel", comment: "new list alert cancel button"), style: .cancel, handler: nil))
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alert.addAction(UIAlertAction(title: NSLocalizedString("Create List", comment: "new list create button"), style: .default, handler: { (_) in
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guard let title = alert.textFields?.first?.text else {
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fatalError()
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}
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let request = Client.createList(title: title)
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self.mastodonController.run(request) { (response) in
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guard case let .success(list, _) = response else { fatalError() }
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self.reloadLists()
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DispatchQueue.main.async {
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let listTimelineController = ListTimelineViewController(for: list, mastodonController: self.mastodonController)
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listTimelineController.presentEditOnAppear = true
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self.show(listTimelineController, sender: nil)
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}
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}
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}))
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present(alert, animated: true)
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case let .savedHashtag(hashtag):
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show(HashtagTimelineViewController(for: hashtag, mastodonController: mastodonController), sender: nil)
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case .addSavedHashtag:
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collectionView.deselectItem(at: indexPath, animated: true)
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let navController = UINavigationController(rootViewController: AddSavedHashtagViewController(mastodonController: mastodonController))
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present(navController, animated: true)
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case let .savedInstance(url):
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show(InstanceTimelineViewController(for: url, parentMastodonController: mastodonController), sender: nil)
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case .findInstance:
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collectionView.deselectItem(at: indexPath, animated: true)
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let findController = FindInstanceViewController(parentMastodonController: mastodonController)
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findController.instanceTimelineDelegate = self
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let navController = UINavigationController(rootViewController: findController)
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present(navController, animated: true)
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}
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}
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}
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extension ExploreViewController {
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enum Section: CaseIterable {
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case bookmarks
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case discover
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case lists
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case savedHashtags
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case savedInstances
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var label: String? {
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switch self {
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case .bookmarks:
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return nil
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case .discover:
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return NSLocalizedString("Discover", comment: "discover section title")
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case .lists:
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return NSLocalizedString("Lists", comment: "explore lists section title")
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case .savedHashtags:
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return NSLocalizedString("Saved Hashtags", comment: "explore saved hashtags section title")
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case .savedInstances:
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return NSLocalizedString("Instance Timelines", comment: "explore instance timelines section title")
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}
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}
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}
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enum Item: Hashable {
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case bookmarks
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case trendingTags
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case profileDirectory
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case list(List)
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case addList
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case savedHashtag(Hashtag)
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case addSavedHashtag
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case savedInstance(URL)
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case findInstance
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var label: String {
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switch self {
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case .bookmarks:
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return NSLocalizedString("Bookmarks", comment: "bookmarks nav item title")
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case .trendingTags:
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return NSLocalizedString("Trending Hashtags", comment: "trending hashtags nav item title")
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case .profileDirectory:
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return NSLocalizedString("Profile Directory", comment: "profile directory nav item title")
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case let .list(list):
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return list.title
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case .addList:
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return NSLocalizedString("New List...", comment: "new list nav item title")
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case let .savedHashtag(hashtag):
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return hashtag.name
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case .addSavedHashtag:
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return NSLocalizedString("Save Hashtag...", comment: "save hashtag nav item title")
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case let .savedInstance(url):
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return url.host!
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case .findInstance:
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return NSLocalizedString("Find An Instance...", comment: "find instance nav item title")
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}
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}
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var image: UIImage {
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let name: String
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switch self {
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case .bookmarks:
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name = "bookmark.fill"
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case .trendingTags:
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name = "arrow.up.arrow.down"
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case .profileDirectory:
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name = "person.2.fill"
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case .list(_):
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name = "list.bullet"
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case .addList, .addSavedHashtag:
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name = "plus"
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case .savedHashtag(_):
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name = "number"
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case .savedInstance(_):
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name = "globe"
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case .findInstance:
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name = "magnifyingglass"
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}
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return UIImage(systemName: name)!
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}
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static func == (lhs: Item, rhs: Item) -> Bool {
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switch (lhs, rhs) {
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case (.bookmarks, .bookmarks):
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return true
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case (.trendingTags, .trendingTags):
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return true
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case (.profileDirectory, .profileDirectory):
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return true
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case let (.list(a), .list(b)):
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return a.id == b.id
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case (.addList, .addList):
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return true
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case let (.savedHashtag(a), .savedHashtag(b)):
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return a == b
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case (.addSavedHashtag, .addSavedHashtag):
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return true
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case let (.savedInstance(a), .savedInstance(b)):
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return a == b
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case (.findInstance, .findInstance):
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return true
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default:
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return false
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}
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}
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func hash(into hasher: inout Hasher) {
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switch self {
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case .bookmarks:
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hasher.combine("bookmarks")
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case .trendingTags:
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hasher.combine("trendingTags")
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case .profileDirectory:
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hasher.combine("profileDirectory")
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case let .list(list):
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hasher.combine("list")
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hasher.combine(list.id)
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case .addList:
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hasher.combine("addList")
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case let .savedHashtag(hashtag):
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hasher.combine("savedHashtag")
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hasher.combine(hashtag.name)
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case .addSavedHashtag:
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hasher.combine("addSavedHashtag")
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case let .savedInstance(url):
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hasher.combine("savedInstance")
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hasher.combine(url)
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case .findInstance:
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hasher.combine("findInstance")
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}
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}
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}
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}
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extension ExploreViewController: InstanceTimelineViewControllerDelegate {
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func didSaveInstance(url: URL) {
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dismiss(animated: true) {
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self.show(InstanceTimelineViewController(for: url, parentMastodonController: self.mastodonController), sender: nil)
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}
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}
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func didUnsaveInstance(url: URL) {
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dismiss(animated: true)
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}
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}
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extension ExploreViewController: UICollectionViewDragDelegate {
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func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
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guard let item = dataSource.itemIdentifier(for: indexPath),
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let accountID = mastodonController.accountInfo?.id else {
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return []
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}
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let provider: NSItemProvider
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switch item {
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case .bookmarks:
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provider = NSItemProvider(object: UserActivityManager.bookmarksActivity())
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case let .list(list):
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guard let activity = UserActivityManager.showTimelineActivity(timeline: .list(id: list.id), accountID: accountID) else { return [] }
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provider = NSItemProvider(object: activity)
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case let .savedHashtag(hashtag):
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provider = NSItemProvider(object: hashtag.url as NSURL)
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if let activity = UserActivityManager.showTimelineActivity(timeline: .tag(hashtag: hashtag.name), accountID: accountID) {
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provider.registerObject(activity, visibility: .all)
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|
}
|
|
case let .savedInstance(url):
|
|
provider = NSItemProvider(object: url as NSURL)
|
|
// todo: should dragging public timelines into new windows be supported?
|
|
case .trendingTags, .profileDirectory, .addList, .addSavedHashtag, .findInstance:
|
|
return []
|
|
}
|
|
return [UIDragItem(itemProvider: provider)]
|
|
}
|
|
}
|