420 lines
16 KiB
Swift
420 lines
16 KiB
Swift
//
|
|
// TimelineViewController.swift
|
|
// Tusker
|
|
//
|
|
// Created by Shadowfacts on 9/20/22.
|
|
// Copyright © 2022 Shadowfacts. All rights reserved.
|
|
//
|
|
|
|
import UIKit
|
|
import Pachyderm
|
|
import Combine
|
|
|
|
// TODO: gonna need a thing to replicate all of EnhancedTableViewController
|
|
|
|
class TimelineViewController: UIViewController, TimelineLikeCollectionViewController, RefreshableViewController {
|
|
let timeline: Timeline
|
|
weak var mastodonController: MastodonController!
|
|
|
|
private(set) var controller: TimelineLikeController<TimelineItem>!
|
|
let confirmLoadMore = PassthroughSubject<Void, Never>()
|
|
private var newer: RequestRange?
|
|
private var older: RequestRange?
|
|
// stored separately because i don't want to query the snapshot every time the user scrolls
|
|
private var isShowingTimelineDescription = false
|
|
|
|
var collectionView: UICollectionView {
|
|
view as! UICollectionView
|
|
}
|
|
private(set) var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
|
|
|
|
init(for timeline: Timeline, mastodonController: MastodonController!) {
|
|
self.timeline = timeline
|
|
self.mastodonController = mastodonController
|
|
|
|
super.init(nibName: nil, bundle: nil)
|
|
|
|
self.controller = TimelineLikeController(delegate: self)
|
|
|
|
addKeyCommand(MenuController.refreshCommand(discoverabilityTitle: "Refresh Timeline"))
|
|
}
|
|
|
|
required init?(coder: NSCoder) {
|
|
fatalError("init(coder:) has not been implemented")
|
|
}
|
|
|
|
override func loadView() {
|
|
var config = UICollectionLayoutListConfiguration(appearance: .plain)
|
|
config.leadingSwipeActionsConfigurationProvider = { [unowned self] in
|
|
(collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.leadingSwipeActions()
|
|
}
|
|
config.trailingSwipeActionsConfigurationProvider = { [unowned self] in
|
|
(collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.trailingSwipeActions()
|
|
}
|
|
config.itemSeparatorHandler = { [unowned self] indexPath, sectionSeparatorConfiguration in
|
|
guard let item = self.dataSource.itemIdentifier(for: indexPath) else {
|
|
return sectionSeparatorConfiguration
|
|
}
|
|
var config = sectionSeparatorConfiguration
|
|
if item.hideSeparators {
|
|
config.topSeparatorVisibility = .hidden
|
|
config.bottomSeparatorVisibility = .hidden
|
|
}
|
|
if case .status(_, _) = item {
|
|
config.topSeparatorInsets = NSDirectionalEdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 0)
|
|
config.bottomSeparatorInsets = NSDirectionalEdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 0)
|
|
}
|
|
return config
|
|
}
|
|
let layout = UICollectionViewCompositionalLayout.list(using: config)
|
|
view = UICollectionView(frame: .zero, collectionViewLayout: layout)
|
|
collectionView.delegate = self
|
|
collectionView.dragDelegate = self
|
|
|
|
registerTimelineLikeCells()
|
|
collectionView.register(PublicTimelineDescriptionCollectionViewCell.self, forCellWithReuseIdentifier: "publicTimelineDescription")
|
|
dataSource = createDataSource()
|
|
applyInitialSnapshot()
|
|
|
|
#if !targetEnvironment(macCatalyst)
|
|
collectionView.refreshControl = UIRefreshControl()
|
|
collectionView.refreshControl!.addTarget(self, action: #selector(refresh), for: .valueChanged)
|
|
#endif
|
|
}
|
|
|
|
override func viewDidLoad() {
|
|
super.viewDidLoad()
|
|
}
|
|
|
|
private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
|
|
let statusCell = UICollectionView.CellRegistration<TimelineStatusCollectionViewCell, Item> { [unowned self] cell, indexPath, item in
|
|
guard case .status(id: let id, state: let state) = item,
|
|
let status = mastodonController.persistentContainer.status(for: id) else {
|
|
fatalError()
|
|
}
|
|
cell.mastodonController = mastodonController
|
|
cell.delegate = self
|
|
cell.updateUI(statusID: id, state: state)
|
|
}
|
|
let timelineDescriptionCell = UICollectionView.CellRegistration<PublicTimelineDescriptionCollectionViewCell, Item> { [unowned self] cell, indexPath, item in
|
|
guard case .public(let local) = timeline else {
|
|
fatalError()
|
|
}
|
|
cell.mastodonController = self.mastodonController
|
|
cell.local = local
|
|
cell.didDismiss = { [unowned self] in
|
|
self.removeTimelineDescriptionCell()
|
|
}
|
|
}
|
|
return UICollectionViewDiffableDataSource(collectionView: collectionView) { [unowned self] collectionView, indexPath, itemIdentifier in
|
|
switch itemIdentifier {
|
|
case .status(_, _):
|
|
return collectionView.dequeueConfiguredReusableCell(using: statusCell, for: indexPath, item: itemIdentifier)
|
|
case .loadingIndicator:
|
|
return loadingIndicatorCell(for: indexPath)
|
|
case .confirmLoadMore:
|
|
return confirmLoadMoreCell(for: indexPath)
|
|
case .publicTimelineDescription:
|
|
self.isShowingTimelineDescription = true
|
|
return collectionView.dequeueConfiguredReusableCell(using: timelineDescriptionCell, for: indexPath, item: itemIdentifier)
|
|
}
|
|
}
|
|
}
|
|
|
|
private func applyInitialSnapshot() {
|
|
if case .public(let local) = timeline,
|
|
(local && !Preferences.shared.hasShownLocalTimelineDescription) ||
|
|
(!local && !Preferences.shared.hasShownFederatedTimelineDescription) {
|
|
var snapshot = dataSource.snapshot()
|
|
snapshot.appendSections([.header])
|
|
snapshot.appendItems([.publicTimelineDescription], toSection: .header)
|
|
dataSource.apply(snapshot, animatingDifferences: false)
|
|
}
|
|
}
|
|
|
|
override func viewWillAppear(_ animated: Bool) {
|
|
super.viewWillAppear(animated)
|
|
|
|
collectionView.indexPathsForSelectedItems?.forEach {
|
|
collectionView.deselectItem(at: $0, animated: true)
|
|
}
|
|
|
|
Task {
|
|
await controller.loadInitial()
|
|
}
|
|
}
|
|
|
|
override func viewDidAppear(_ animated: Bool) {
|
|
super.viewDidAppear(animated)
|
|
|
|
if isShowingTimelineDescription,
|
|
case .public(let local) = timeline {
|
|
if local {
|
|
Preferences.shared.hasShownLocalTimelineDescription = true
|
|
} else {
|
|
Preferences.shared.hasShownFederatedTimelineDescription = true
|
|
}
|
|
}
|
|
}
|
|
|
|
override func viewDidDisappear(_ animated: Bool) {
|
|
super.viewDidDisappear(animated)
|
|
|
|
// pruneOffscreenRows()
|
|
}
|
|
|
|
private func removeTimelineDescriptionCell() {
|
|
var snapshot = dataSource.snapshot()
|
|
snapshot.deleteSections([.header])
|
|
dataSource.apply(snapshot, animatingDifferences: true)
|
|
isShowingTimelineDescription = false
|
|
}
|
|
|
|
// private func pruneOffscreenRows() {
|
|
// guard let lastVisibleIndexPath = collectionView.indexPathsForVisibleItems.last else {
|
|
// return
|
|
// }
|
|
// var snapshot = dataSource.snapshot()
|
|
// guard snapshot.indexOfSection(.statuses) != nil else {
|
|
// return
|
|
// }
|
|
// let items = snapshot.itemIdentifiers(inSection: .statuses)
|
|
// let pageSize = 20
|
|
// let numberOfPagesToPrune = (items.count - lastVisibleIndexPath.row - 1) / pageSize
|
|
// if numberOfPagesToPrune > 0 {
|
|
// let itemsToRemove = Array(items.suffix(numberOfPagesToPrune * pageSize))
|
|
// snapshot.deleteItems(itemsToRemove)
|
|
//
|
|
// dataSource.apply(snapshot, animatingDifferences: false)
|
|
//
|
|
// if case .status(id: let id, state: _) = snapshot.itemIdentifiers(inSection: .statuses).last {
|
|
// older = .before(id: id, count: nil)
|
|
// }
|
|
// }
|
|
// }
|
|
|
|
@objc func refresh() {
|
|
Task {
|
|
await controller.loadNewer()
|
|
#if !targetEnvironment(macCatalyst)
|
|
collectionView.refreshControl?.endRefreshing()
|
|
#endif
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
extension TimelineViewController {
|
|
enum Section: TimelineLikeCollectionViewSection {
|
|
case header
|
|
case statuses
|
|
case footer
|
|
|
|
static var entries: Self { .statuses }
|
|
}
|
|
enum Item: TimelineLikeCollectionViewItem {
|
|
typealias TimelineItem = String // status ID
|
|
|
|
case status(id: String, state: StatusState)
|
|
case loadingIndicator
|
|
case confirmLoadMore
|
|
case publicTimelineDescription
|
|
|
|
static func fromTimelineItem(_ id: String) -> Self {
|
|
return .status(id: id, state: .unknown)
|
|
}
|
|
|
|
static func ==(lhs: Item, rhs: Item) -> Bool {
|
|
switch (lhs, rhs) {
|
|
case let (.status(id: a, state: _), .status(id: b, state: _)):
|
|
return a == b
|
|
case (.loadingIndicator, .loadingIndicator):
|
|
return true
|
|
case (.confirmLoadMore, .confirmLoadMore):
|
|
return true
|
|
case (.publicTimelineDescription, .publicTimelineDescription):
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func hash(into hasher: inout Hasher) {
|
|
switch self {
|
|
case .status(id: let id, state: _):
|
|
hasher.combine(0)
|
|
hasher.combine(id)
|
|
case .loadingIndicator:
|
|
hasher.combine(1)
|
|
case .confirmLoadMore:
|
|
hasher.combine(2)
|
|
case .publicTimelineDescription:
|
|
hasher.combine(3)
|
|
}
|
|
}
|
|
|
|
var hideSeparators: Bool {
|
|
switch self {
|
|
case .loadingIndicator, .publicTimelineDescription:
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
var isSelectable: Bool {
|
|
switch self {
|
|
case .publicTimelineDescription, .status(id: _, state: _):
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// MARK: TimelineLikeControllerDelegate
|
|
extension TimelineViewController {
|
|
typealias TimelineItem = String // status ID
|
|
|
|
func loadInitial() async throws -> [TimelineItem] {
|
|
guard let mastodonController else {
|
|
throw Error.noClient
|
|
}
|
|
|
|
let request = Client.getStatuses(timeline: timeline)
|
|
let (statuses, _) = try await mastodonController.run(request)
|
|
|
|
if !statuses.isEmpty {
|
|
newer = .after(id: statuses.first!.id, count: nil)
|
|
older = .before(id: statuses.last!.id, count: nil)
|
|
}
|
|
|
|
return await withCheckedContinuation { continuation in
|
|
mastodonController.persistentContainer.addAll(statuses: statuses) {
|
|
continuation.resume(returning: statuses.map(\.id))
|
|
}
|
|
}
|
|
}
|
|
|
|
func loadNewer() async throws -> [TimelineItem] {
|
|
guard let newer else {
|
|
throw Error.noNewer
|
|
}
|
|
|
|
let request = Client.getStatuses(timeline: timeline, range: newer)
|
|
let (statuses, _) = try await mastodonController.run(request)
|
|
|
|
guard !statuses.isEmpty else {
|
|
throw Error.allCaughtUp
|
|
}
|
|
|
|
self.newer = .after(id: statuses.first!.id, count: nil)
|
|
|
|
return await withCheckedContinuation { continuation in
|
|
mastodonController.persistentContainer.addAll(statuses: statuses) {
|
|
continuation.resume(returning: statuses.map(\.id))
|
|
}
|
|
}
|
|
}
|
|
|
|
func loadOlder() async throws -> [TimelineItem] {
|
|
guard let older else {
|
|
throw Error.noOlder
|
|
}
|
|
|
|
let request = Client.getStatuses(timeline: timeline, range: older)
|
|
let (statuses, _) = try await mastodonController.run(request)
|
|
|
|
if !statuses.isEmpty {
|
|
self.older = .before(id: statuses.last!.id, count: nil)
|
|
}
|
|
|
|
return await withCheckedContinuation { continuation in
|
|
mastodonController.persistentContainer.addAll(statuses: statuses) {
|
|
continuation.resume(returning: statuses.map(\.id))
|
|
}
|
|
}
|
|
}
|
|
|
|
enum Error: TimelineLikeCollectionViewError {
|
|
case noClient
|
|
case noNewer
|
|
case noOlder
|
|
case allCaughtUp
|
|
}
|
|
}
|
|
|
|
extension TimelineViewController: UICollectionViewDelegate {
|
|
func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
|
|
guard case .statuses = dataSource.sectionIdentifier(for: indexPath.section),
|
|
case .status(_, _) = dataSource.itemIdentifier(for: indexPath) else {
|
|
return
|
|
}
|
|
|
|
let itemsInSection = collectionView.numberOfItems(inSection: indexPath.section)
|
|
if indexPath.row == itemsInSection - 1 {
|
|
Task {
|
|
await controller.loadOlder()
|
|
}
|
|
}
|
|
}
|
|
|
|
func collectionView(_ collectionView: UICollectionView, shouldSelectItemAt indexPath: IndexPath) -> Bool {
|
|
return dataSource.itemIdentifier(for: indexPath)?.isSelectable ?? false
|
|
}
|
|
|
|
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
|
|
guard let item = dataSource.itemIdentifier(for: indexPath) else {
|
|
return
|
|
}
|
|
switch item {
|
|
case .publicTimelineDescription:
|
|
removeTimelineDescriptionCell()
|
|
case .status(id: let id, state: let state):
|
|
let status = mastodonController.persistentContainer.status(for: id)!
|
|
// if the status in the timeline is a reblog, show the status that it is a reblog of
|
|
selected(status: status.reblog?.id ?? id, state: state.copy())
|
|
case .loadingIndicator, .confirmLoadMore:
|
|
fatalError("unreachable")
|
|
}
|
|
}
|
|
|
|
func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
|
|
return (collectionView.cellForItem(at: indexPath) as? TimelineStatusCollectionViewCell)?.contextMenuConfiguration()
|
|
}
|
|
|
|
func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
|
|
MenuPreviewHelper.willPerformPreviewAction(animator: animator, presenter: self)
|
|
}
|
|
|
|
func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
|
|
if isShowingTimelineDescription {
|
|
removeTimelineDescriptionCell()
|
|
}
|
|
}
|
|
}
|
|
|
|
extension TimelineViewController: UICollectionViewDragDelegate {
|
|
func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
|
|
(collectionView.cellForItem(at: indexPath) as? TimelineStatusCollectionViewCell)?.dragItemsForBeginning(session: session) ?? []
|
|
}
|
|
}
|
|
|
|
extension TimelineViewController: TuskerNavigationDelegate {
|
|
var apiController: MastodonController { mastodonController }
|
|
}
|
|
|
|
extension TimelineViewController: MenuActionProvider {
|
|
}
|
|
|
|
extension TimelineViewController: StatusCollectionViewCellDelegate {
|
|
func statusCellNeedsReconfigure(_ cell: StatusCollectionViewCell, animated: Bool, completion: (() -> Void)?) {
|
|
if let indexPath = collectionView.indexPath(for: cell) {
|
|
var snapshot = dataSource.snapshot()
|
|
snapshot.reconfigureItems([dataSource.itemIdentifier(for: indexPath)!])
|
|
dataSource.apply(snapshot, animatingDifferences: animated, completion: completion)
|
|
}
|
|
}
|
|
}
|