330 lines
13 KiB
Swift
330 lines
13 KiB
Swift
//
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// NotificationTimelineViewController.swift
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// Mastodon
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//
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// Created by MainasuK on 2022-1-21.
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//
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import os.log
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import UIKit
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import Combine
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import CoreDataStack
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import MastodonLocalization
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final class NotificationTimelineViewController: UIViewController, NeedsDependency, MediaPreviewableViewController {
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let logger = Logger(subsystem: "NotificationTimelineViewController", category: "ViewController")
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weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
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weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
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let mediaPreviewTransitionController = MediaPreviewTransitionController()
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var disposeBag = Set<AnyCancellable>()
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var observations = Set<NSKeyValueObservation>()
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var viewModel: NotificationTimelineViewModel!
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private(set) lazy var refreshControl: UIRefreshControl = {
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let refreshControl = UIRefreshControl()
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refreshControl.addTarget(self, action: #selector(NotificationTimelineViewController.refreshControlValueChanged(_:)), for: .valueChanged)
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return refreshControl
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}()
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private(set) lazy var tableView: UITableView = {
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let tableView = UITableView()
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tableView.backgroundColor = .clear
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tableView.rowHeight = UITableView.automaticDimension
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tableView.separatorStyle = .none
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return tableView
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}()
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let cellFrameCache = NSCache<NSNumber, NSValue>()
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deinit {
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
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}
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}
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extension NotificationTimelineViewController {
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override func viewDidLoad() {
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super.viewDidLoad()
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tableView.translatesAutoresizingMaskIntoConstraints = false
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view.addSubview(tableView)
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NSLayoutConstraint.activate([
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tableView.topAnchor.constraint(equalTo: view.topAnchor),
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tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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])
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tableView.delegate = self
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viewModel.setupDiffableDataSource(
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tableView: tableView,
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notificationTableViewCellDelegate: self
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)
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// setup batch fetch
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viewModel.listBatchFetchViewModel.setup(scrollView: tableView)
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viewModel.listBatchFetchViewModel.shouldFetch
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.receive(on: DispatchQueue.main)
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.sink { [weak self] _ in
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guard let self = self else { return }
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self.viewModel.loadOldestStateMachine.enter(NotificationTimelineViewModel.LoadOldestState.Loading.self)
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}
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.store(in: &disposeBag)
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// setup refresh control
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tableView.refreshControl = refreshControl
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viewModel.didLoadLatest
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.receive(on: DispatchQueue.main)
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.sink { [weak self] in
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guard let self = self else { return }
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UIView.animate(withDuration: 0.5) { [weak self] in
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guard let self = self else { return }
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self.refreshControl.endRefreshing()
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}
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}
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.store(in: &disposeBag)
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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refreshControl.endRefreshing()
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tableView.deselectRow(with: transitionCoordinator, animated: animated)
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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if !viewModel.isLoadingLatest {
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let now = Date()
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if let timestamp = viewModel.lastAutomaticFetchTimestamp {
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if now.timeIntervalSince(timestamp) > 60 {
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logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): auto fetch latest timeline…")
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Task {
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await viewModel.loadLatest()
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}
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viewModel.lastAutomaticFetchTimestamp = now
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} else {
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logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): auto fetch latest timeline skip. Reason: updated in recent 60s")
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}
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} else {
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Task {
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await viewModel.loadLatest()
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}
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viewModel.lastAutomaticFetchTimestamp = now
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}
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}
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}
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}
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// MARK: - CellFrameCacheContainer
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extension NotificationTimelineViewController: CellFrameCacheContainer {
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func keyForCache(tableView: UITableView, indexPath: IndexPath) -> NSNumber? {
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guard let diffableDataSource = viewModel.diffableDataSource else { return nil }
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return nil }
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let key = NSNumber(value: item.hashValue)
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return key
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}
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}
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extension NotificationTimelineViewController {
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@objc private func refreshControlValueChanged(_ sender: UIRefreshControl) {
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logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public)")
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Task {
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await viewModel.loadLatest()
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}
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}
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}
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// MARK: - UITableViewDelegate
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extension NotificationTimelineViewController: UITableViewDelegate, AutoGenerateTableViewDelegate {
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// sourcery:inline:NotificationTimelineViewController.AutoGenerateTableViewDelegate
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// Generated using Sourcery
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// DO NOT EDIT
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func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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aspectTableView(tableView, didSelectRowAt: indexPath)
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}
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func tableView(_ tableView: UITableView, contextMenuConfigurationForRowAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
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return aspectTableView(tableView, contextMenuConfigurationForRowAt: indexPath, point: point)
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}
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func tableView(_ tableView: UITableView, previewForHighlightingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
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return aspectTableView(tableView, previewForHighlightingContextMenuWithConfiguration: configuration)
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}
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func tableView(_ tableView: UITableView, previewForDismissingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
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return aspectTableView(tableView, previewForDismissingContextMenuWithConfiguration: configuration)
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}
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func tableView(_ tableView: UITableView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
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aspectTableView(tableView, willPerformPreviewActionForMenuWith: configuration, animator: animator)
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}
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// sourcery:end
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func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
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guard let frame = retrieveCellFrame(tableView: tableView, indexPath: indexPath) else {
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return 300
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}
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return ceil(frame.height)
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}
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func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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guard let item = viewModel.diffableDataSource?.itemIdentifier(for: indexPath) else {
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return
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}
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// check item type inside `loadMore`
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Task {
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await viewModel.loadMore(item: item)
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}
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}
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func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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cacheCellFrame(tableView: tableView, didEndDisplaying: cell, forRowAt: indexPath)
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}
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}
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// MARK: - NotificationTableViewCellDelegate
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extension NotificationTimelineViewController: NotificationTableViewCellDelegate { }
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// MARK: - ScrollViewContainer
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extension NotificationTimelineViewController: ScrollViewContainer {
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var scrollView: UIScrollView? { tableView }
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}
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extension NotificationTimelineViewController {
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override var keyCommands: [UIKeyCommand]? {
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return navigationKeyCommands
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}
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}
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extension NotificationTimelineViewController: TableViewControllerNavigateable {
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func navigate(direction: TableViewNavigationDirection) {
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if let indexPathForSelectedRow = tableView.indexPathForSelectedRow {
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// navigate up/down on the current selected item
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navigateToStatus(direction: direction, indexPath: indexPathForSelectedRow)
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} else {
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// set first visible item selected
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navigateToFirstVisibleStatus()
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}
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}
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private func navigateToStatus(direction: TableViewNavigationDirection, indexPath: IndexPath) {
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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let items = diffableDataSource.snapshot().itemIdentifiers
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guard let selectedItem = diffableDataSource.itemIdentifier(for: indexPath),
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let selectedItemIndex = items.firstIndex(of: selectedItem) else {
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return
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}
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let _navigateToItem: NotificationItem? = {
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var index = selectedItemIndex
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while 0..<items.count ~= index {
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index = {
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switch direction {
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case .up: return index - 1
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case .down: return index + 1
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}
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}()
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guard 0..<items.count ~= index else { return nil }
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let item = items[index]
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guard Self.validNavigateableItem(item) else { continue }
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return item
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}
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return nil
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}()
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guard let item = _navigateToItem, let indexPath = diffableDataSource.indexPath(for: item) else { return }
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let scrollPosition: UITableView.ScrollPosition = overrideNavigationScrollPosition ?? Self.navigateScrollPosition(tableView: tableView, indexPath: indexPath)
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tableView.selectRow(at: indexPath, animated: true, scrollPosition: scrollPosition)
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}
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private func navigateToFirstVisibleStatus() {
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guard let indexPathsForVisibleRows = tableView.indexPathsForVisibleRows else { return }
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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var visibleItems: [NotificationItem] = indexPathsForVisibleRows.sorted().compactMap { indexPath in
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guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return nil }
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guard Self.validNavigateableItem(item) else { return nil }
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return item
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}
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if indexPathsForVisibleRows.first?.row != 0, visibleItems.count > 1 {
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// drop first when visible not the first cell of table
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visibleItems.removeFirst()
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}
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guard let item = visibleItems.first, let indexPath = diffableDataSource.indexPath(for: item) else { return }
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let scrollPosition: UITableView.ScrollPosition = overrideNavigationScrollPosition ?? Self.navigateScrollPosition(tableView: tableView, indexPath: indexPath)
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tableView.selectRow(at: indexPath, animated: true, scrollPosition: scrollPosition)
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}
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static func validNavigateableItem(_ item: NotificationItem) -> Bool {
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switch item {
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case .feed:
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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 open() {
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guard let indexPathForSelectedRow = tableView.indexPathForSelectedRow else { return }
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guard let diffableDataSource = viewModel.diffableDataSource else { return }
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guard let item = diffableDataSource.itemIdentifier(for: indexPathForSelectedRow) else { return }
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Task { @MainActor in
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switch item {
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case .feed(let record):
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guard let feed = record.object(in: self.context.managedObjectContext) else { return }
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guard let notification = feed.notification else { return }
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if let stauts = notification.status {
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let threadViewModel = ThreadViewModel(
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context: self.context,
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optionalRoot: .root(context: .init(status: .init(objectID: stauts.objectID)))
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)
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self.coordinator.present(
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scene: .thread(viewModel: threadViewModel),
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from: self,
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transition: .show
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)
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} else {
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let profileViewModel = ProfileViewModel(
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context: self.context,
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optionalMastodonUser: notification.account
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)
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self.coordinator.present(
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scene: .profile(viewModel: profileViewModel),
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from: self,
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transition: .show
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)
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}
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default:
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break
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}
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} // end Task
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}
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func navigateKeyCommandHandlerRelay(_ sender: UIKeyCommand) {
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navigateKeyCommandHandler(sender)
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}
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}
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