365 lines
15 KiB
Swift
365 lines
15 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: EnhancedTableViewController {
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let mastodonController: MastodonController
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var dataSource: DataSource!
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var resultsController: SearchResultsViewController!
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var searchController: UISearchController!
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init(mastodonController: MastodonController) {
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self.mastodonController = mastodonController
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super.init(style: .insetGrouped)
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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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tableView.register(UINib(nibName: "BasicTableViewCell", bundle: .main), forCellReuseIdentifier: "basicCell")
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dataSource = DataSource(tableView: tableView, cellProvider: { (tableView, indexPath, item) -> UITableViewCell? in
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let cell = tableView.dequeueReusableCell(withIdentifier: "basicCell", for: indexPath)
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switch item {
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case .bookmarks:
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cell.imageView!.image = UIImage(systemName: "bookmark.fill")
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cell.textLabel!.text = NSLocalizedString("Bookmarks", comment: "bookmarks nav item title")
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cell.accessoryType = .disclosureIndicator
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case let .list(list):
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cell.imageView!.image = UIImage(systemName: "list.bullet")
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cell.textLabel!.text = list.title
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cell.accessoryType = .disclosureIndicator
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case .addList:
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cell.imageView!.image = UIImage(systemName: "plus")
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cell.textLabel!.text = NSLocalizedString("New List...", comment: "new list nav item title")
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cell.accessoryType = .none
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case let .savedHashtag(hashtag):
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cell.imageView!.image = UIImage(systemName: "number")
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cell.textLabel!.text = hashtag.name
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cell.accessoryType = .disclosureIndicator
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case .addSavedHashtag:
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cell.imageView!.image = UIImage(systemName: "plus")
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cell.textLabel!.text = NSLocalizedString("Save Hashtag...", comment: "save hashtag nav item title")
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cell.accessoryType = .none
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case let .savedInstance(url):
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cell.imageView!.image = UIImage(systemName: "globe")
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cell.textLabel!.text = url.host!
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cell.accessoryType = .disclosureIndicator
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case .findInstance:
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cell.imageView!.image = UIImage(systemName: "magnifyingglass")
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cell.textLabel!.text = NSLocalizedString("Find An Instance...", comment: "find instance nav item title")
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cell.accessoryType = .none
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}
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return cell
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})
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dataSource.exploreController = self
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let account = mastodonController.accountInfo!
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.bookmarks, .lists, .savedHashtags, .savedInstances])
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snapshot.appendItems([.bookmarks], toSection: .bookmarks)
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snapshot.appendItems([.addList], toSection: .lists)
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snapshot.appendItems(SavedDataManager.shared.sortedHashtags(for: account).map { .savedHashtag($0) } + [.addSavedHashtag], toSection: .savedHashtags)
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snapshot.appendItems(SavedDataManager.shared.savedInstances(for: account).map { .savedInstance($0) } + [.findInstance], toSection: .savedInstances)
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// the initial, static items should not be displayed with an animation
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UIView.performWithoutAnimation {
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dataSource.apply(snapshot)
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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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reloadLists()
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}
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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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fatalError()
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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) } + [.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 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) } + [.addSavedHashtag], toSection: .savedHashtags)
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dataSource.apply(snapshot)
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}
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@objc 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) } + [.findInstance], toSection: .savedInstances)
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dataSource.apply(snapshot)
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}
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func deleteList(_ list: List) {
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let title = String(format: NSLocalizedString("Are you sure want to delete the '%@' list?", comment: "delete list alert title"), 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: nil))
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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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}
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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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// MARK: - Table view delegate
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override func tableView(_ tableView: UITableView, didSelectRowAt 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 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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tableView.selectRow(at: nil, animated: true, scrollPosition: .none)
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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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tableView.selectRow(at: nil, animated: true, scrollPosition: .none)
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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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tableView.selectRow(at: nil, animated: true, scrollPosition: .none)
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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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override func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCell.EditingStyle {
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return .delete
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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 lists
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case savedHashtags
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case savedInstances
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}
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enum Item: Hashable {
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case bookmarks
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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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static func == (lhs: ExploreViewController.Item, rhs: ExploreViewController.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 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 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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class DataSource: UITableViewDiffableDataSource<Section, Item> {
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weak var exploreController: ExploreViewController?
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override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
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switch section {
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case 1:
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return NSLocalizedString("Lists", comment: "explore lists section title")
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case 2:
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return NSLocalizedString("Saved Hashtags", comment: "explore saved hashtags section title")
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case 3:
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return NSLocalizedString("Instance Timelines", comment: "explore instance timelines section title")
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default:
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return nil
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}
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}
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override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
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switch itemIdentifier(for: indexPath) {
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case .list(_):
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return true
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case .savedHashtag(_):
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return true
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case .savedInstance(_):
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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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override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
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guard editingStyle == .delete,
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let exploreController = exploreController else {
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return
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}
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switch itemIdentifier(for: indexPath) {
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case let .list(list):
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exploreController.deleteList(list)
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case let .savedHashtag(hashtag):
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exploreController.removeSavedHashtag(hashtag)
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case let .savedInstance(url):
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exploreController.removeSavedInstance(url)
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default:
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return
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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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