694 lines
27 KiB
Swift
694 lines
27 KiB
Swift
//
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// ProfileStatusesViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 10/6/22.
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// Copyright © 2022 Shadowfacts. All rights reserved.
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//
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import UIKit
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import Pachyderm
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import Combine
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class ProfileStatusesViewController: UIViewController, TimelineLikeCollectionViewController, CollectionViewController {
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weak var owner: ProfileViewController?
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let mastodonController: MastodonController
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let filterer: Filterer
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private(set) var accountID: String!
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let kind: Kind
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var initialHeaderMode: HeaderMode?
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weak var profileHeaderDelegate: ProfileHeaderViewDelegate?
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private(set) var controller: TimelineLikeController<TimelineItem>!
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let confirmLoadMore = PassthroughSubject<Void, Never>()
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private var newer: RequestRange?
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private var older: RequestRange?
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private var cancellables = Set<AnyCancellable>()
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var collectionView: UICollectionView! {
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view as? UICollectionView
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}
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private(set) var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
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private(set) var headerCell: ProfileHeaderCollectionViewCell?
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var reconfigureVisibleItemsOnEndDecelerating: Bool = false
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private(set) var state: State = .unloaded
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init(accountID: String?, kind: Kind, owner: ProfileViewController) {
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self.accountID = accountID
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self.kind = kind
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self.owner = owner
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self.mastodonController = owner.mastodonController
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self.filterer = Filterer(mastodonController: mastodonController, context: .account, htmlConverter: TimelineStatusCollectionViewCell.htmlConverter)
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super.init(nibName: nil, bundle: nil)
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self.controller = TimelineLikeController(delegate: self, ownerType: String(describing: self))
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addKeyCommand(MenuController.refreshCommand(discoverabilityTitle: "Refresh Profile"))
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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 loadView() {
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var config = UICollectionLayoutListConfiguration(appearance: .plain)
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config.backgroundColor = .appBackground
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config.leadingSwipeActionsConfigurationProvider = { [unowned self] in
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(collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.leadingSwipeActions()
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}
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config.trailingSwipeActionsConfigurationProvider = { [unowned self] in
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(collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.trailingSwipeActions()
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}
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config.itemSeparatorHandler = { [unowned self] indexPath, sectionSeparatorConfiguration in
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guard let item = self.dataSource.itemIdentifier(for: indexPath),
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let section = self.dataSource.sectionIdentifier(for: indexPath.section) else {
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return sectionSeparatorConfiguration
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}
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var config = sectionSeparatorConfiguration
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if item.hideSeparators {
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config.topSeparatorVisibility = .hidden
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config.bottomSeparatorVisibility = .hidden
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} else if section == .header {
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config.topSeparatorVisibility = .hidden
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config.bottomSeparatorInsets = .zero
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} else if indexPath.row == 0 && (section == .pinned || section == .entries) {
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// TODO: row == 0 isn't technically right, the top post could be filtered out
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config.topSeparatorInsets = .zero
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} else if case .status(id: _, collapseState: _, filterState: let filterState, pinned: _) = item,
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filterer.isKnownHide(state: filterState) {
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config.topSeparatorVisibility = .hidden
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config.bottomSeparatorVisibility = .hidden
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} else {
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config.topSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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config.bottomSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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}
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return config
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}
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let layout = UICollectionViewCompositionalLayout { [unowned self] sectionIndex, environment in
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if case .header = dataSource.sectionIdentifier(for: sectionIndex) {
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var config = UICollectionLayoutListConfiguration(appearance: .plain)
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config.backgroundColor = .appBackground
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config.separatorConfiguration.bottomSeparatorInsets = .zero
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return .list(using: config, layoutEnvironment: environment)
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} else {
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let section = NSCollectionLayoutSection.list(using: config, layoutEnvironment: environment)
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section.readableContentInset(in: environment)
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return section
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}
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}
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view = UICollectionView(frame: .zero, collectionViewLayout: layout)
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collectionView.delegate = self
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collectionView.dragDelegate = self
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collectionView.allowsFocus = true
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registerTimelineLikeCells()
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dataSource = createDataSource()
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#if !targetEnvironment(macCatalyst)
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collectionView.refreshControl = UIRefreshControl()
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collectionView.refreshControl!.addTarget(self, action: #selector(refresh), for: .valueChanged)
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#endif
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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mastodonController.persistentContainer.accountSubject
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.receive(on: DispatchQueue.main)
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.filter { [unowned self] in $0 == self.accountID }
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.sink { [unowned self] id in
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switch state {
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case .unloaded:
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Task { [self] in
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await self.load()
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}
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case .loaded, .setupInitialSnapshot:
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var snapshot = self.dataSource.snapshot()
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snapshot.reconfigureItems([.header(id)])
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self.dataSource.apply(snapshot, animatingDifferences: true)
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}
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}
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.store(in: &cancellables)
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mastodonController.persistentContainer.relationshipSubject
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.receive(on: DispatchQueue.main)
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.filter { [unowned self] in $0 == self.accountID }
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.sink { [unowned self] id in
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switch state {
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case .unloaded:
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break
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case .loaded, .setupInitialSnapshot:
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var snapshot = self.dataSource.snapshot()
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snapshot.reconfigureItems([.header(id)])
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self.dataSource.apply(snapshot, animatingDifferences: true)
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}
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}
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.store(in: &cancellables)
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filterer.filtersChanged = { [unowned self] actionsChanged in
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self.reapplyFilters(actionsChanged: actionsChanged)
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}
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NotificationCenter.default.addObserver(self, selector: #selector(handleStatusDeleted), name: .statusDeleted, object: mastodonController)
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}
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private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
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collectionView.register(ProfileHeaderCollectionViewCell.self, forCellWithReuseIdentifier: "headerCell")
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let statusCell = UICollectionView.CellRegistration<TimelineStatusCollectionViewCell, (String, CollapseState, Filterer.Result, NSAttributedString?, Bool)> { [unowned self] cell, indexPath, item in
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cell.delegate = self
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cell.showPinned = item.4
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cell.updateUI(statusID: item.0, state: item.1, filterResult: item.2, precomputedContent: item.3)
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}
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let zeroHeightCell = UICollectionView.CellRegistration<ZeroHeightCollectionViewCell, Void> { _, _, _ in
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}
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let noContentCell = UICollectionView.CellRegistration<ProfileNoContentCollectionViewCell, URL> { [unowned self] cell, _, item in
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cell.delegate = self
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cell.updateUI(accountURL: item)
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}
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return UICollectionViewDiffableDataSource(collectionView: collectionView) { [unowned self] collectionView, indexPath, itemIdentifier in
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switch itemIdentifier {
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case .header(let id):
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if let headerCell = self.headerCell {
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headerCell.view?.updateUI(for: id)
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return headerCell
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} else {
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let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "headerCell", for: indexPath) as! ProfileHeaderCollectionViewCell
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switch self.initialHeaderMode {
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case nil:
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fatalError("missing initialHeaderMode")
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case .createView:
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let view = ProfileHeaderView.create()
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view.delegate = self.profileHeaderDelegate
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view.updateUI(for: id)
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view.pagesSegmentedControl.setSelectedOption(self.owner!.currentPage, animated: false)
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cell.addHeader(view)
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case .useExistingView(let view):
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view.updateUI(for: id)
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cell.addHeader(view)
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case .placeholder(height: let height):
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_ = cell.addConstraint(height: height)
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}
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self.headerCell = cell
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return cell
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}
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case .status(id: let id, collapseState: let collapseState, filterState: let filterState, pinned: let pinned):
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let (result, precomputedContent) = filterResult(state: filterState, statusID: id)
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switch result {
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case .allow, .warn(_):
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return collectionView.dequeueConfiguredReusableCell(using: statusCell, for: indexPath, item: (id, collapseState, result, precomputedContent, pinned))
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case .hide:
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return collectionView.dequeueConfiguredReusableCell(using: zeroHeightCell, for: indexPath, item: ())
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}
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case .loadingIndicator:
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return loadingIndicatorCell(for: indexPath)
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case .confirmLoadMore:
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return confirmLoadMoreCell(for: indexPath)
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case .noContent(let accountURL):
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return collectionView.dequeueConfiguredReusableCell(using: noContentCell, for: indexPath, item: accountURL)
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}
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}
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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clearSelectionOnAppear(animated: animated)
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Task {
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if case .notLoadedInitial = controller.state {
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await load()
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}
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}
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}
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func setAccountID(_ id: String) {
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self.accountID = id
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// TODO: maybe this function should be async?
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Task {
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await load()
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}
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}
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private func load() async {
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guard isViewLoaded,
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let accountID,
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state == .unloaded,
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let account = mastodonController.persistentContainer.account(for: accountID) else {
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return
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}
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.header, .pinned, .statuses])
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snapshot.appendItems([.header(accountID)], toSection: .header)
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await apply(snapshot, animatingDifferences: false)
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state = .setupInitialSnapshot
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Task {
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if let (all, _) = try? await mastodonController.run(Client.getRelationships(accounts: [accountID])),
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let relationship = all.first {
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self.mastodonController.persistentContainer.addOrUpdate(relationship: relationship)
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}
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}
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await controller.loadInitial()
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await tryLoadPinned()
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var newSnapshot = dataSource.snapshot()
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if newSnapshot.numberOfItems(inSection: .pinned) == 0,
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newSnapshot.numberOfItems(inSection: .statuses) == 0,
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account.url.host != mastodonController.instanceURL.host {
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newSnapshot.appendItems([.noContent(accountURL: account.url)], toSection: .pinned)
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await apply(newSnapshot, animatingDifferences: true)
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}
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state = .loaded
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// remove any content inset that was added when switching pages to this VC
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collectionView.contentInset = .zero
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}
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private func reloadInitial() async {
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state = .unloaded
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await load()
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}
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private func tryLoadPinned() async {
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do {
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try await loadPinned()
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} catch {
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let config = ToastConfiguration(from: error, with: "Loading Pinned", in: self) { toast in
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toast.dismissToast(animated: true)
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await self.tryLoadPinned()
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}
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self.showToast(configuration: config, animated: true)
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}
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}
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private func loadPinned() async throws {
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guard case .statuses = kind,
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mastodonController.instanceFeatures.profilePinnedStatuses else {
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return
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}
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let request = Account.getStatuses(accountID, range: .default, onlyMedia: false, pinned: true, excludeReplies: false)
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let (statuses, _) = try await mastodonController.run(request)
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await withCheckedContinuation { continuation in
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mastodonController.persistentContainer.addAll(statuses: statuses) {
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continuation.resume()
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}
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}
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var snapshot = dataSource.snapshot()
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let existingPinned = snapshot.itemIdentifiers(inSection: .pinned)
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let items = statuses.map {
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let item = Item.status(id: $0.id, collapseState: .unknown, filterState: .unknown, pinned: true)
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// try to keep the existing status state
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if let existing = existingPinned.first(where: { $0 == item }) {
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return existing
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} else {
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return item
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}
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}
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snapshot.deleteItems(snapshot.itemIdentifiers(inSection: .pinned))
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snapshot.appendItems(items, toSection: .pinned)
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await apply(snapshot, animatingDifferences: true)
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}
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private func filterResult(state: FilterState, statusID: String) -> (Filterer.Result, NSAttributedString?) {
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let status = {
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let status = self.mastodonController.persistentContainer.status(for: statusID)!
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// if the status is a reblog of another one, filter based on that one
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if let reblogged = status.reblog {
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return (reblogged, true)
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} else {
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return (status, false)
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}
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}
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return filterer.resolve(state: state, status: status)
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}
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private func reapplyFilters(actionsChanged: Bool) {
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let visible = collectionView.indexPathsForVisibleItems
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let items = visible
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.compactMap { dataSource.itemIdentifier(for: $0) }
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.filter {
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if case .status(_, _, _, _) = $0 {
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return true
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} else {
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return false
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}
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}
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guard !items.isEmpty else {
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return
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}
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var snapshot = dataSource.snapshot()
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if actionsChanged {
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snapshot.reloadItems(items)
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} else {
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snapshot.reconfigureItems(items)
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}
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dataSource.apply(snapshot)
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}
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@objc func refresh() {
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guard case .loaded = state else {
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#if !targetEnvironment(macCatalyst)
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collectionView.refreshControl?.endRefreshing()
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#endif
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return
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}
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Task {
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if newer == nil {
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// no statuses were loaded initially, so reload the initial batch
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await reloadInitial()
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} else {
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// TODO: coalesce these data source updates
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// TODO: refresh profile
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await controller.loadNewer()
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await tryLoadPinned()
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}
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#if !targetEnvironment(macCatalyst)
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collectionView.refreshControl?.endRefreshing()
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#endif
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}
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}
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@objc private func handleStatusDeleted(_ notification: Foundation.Notification) {
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guard let userInfo = notification.userInfo,
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let statusIDs = userInfo["statusIDs"] as? [String] else {
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return
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}
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var snapshot = self.dataSource.snapshot()
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let toDelete = statusIDs
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.flatMap { id in
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// need to delete from both pinned and non-pinned sections
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[
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Item.status(id: id, collapseState: .unknown, filterState: .unknown, pinned: false),
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Item.status(id: id, collapseState: .unknown, filterState: .unknown, pinned: true),
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]
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}
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.filter { item in
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snapshot.itemIdentifiers.contains(item)
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}
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if !toDelete.isEmpty {
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snapshot.deleteItems(toDelete)
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self.dataSource.apply(snapshot, animatingDifferences: true)
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}
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}
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}
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extension ProfileStatusesViewController {
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enum State {
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case unloaded
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case setupInitialSnapshot
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case loaded
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}
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}
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extension ProfileStatusesViewController {
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enum Kind {
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case statuses, withReplies, onlyMedia
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}
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enum HeaderMode {
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case createView, useExistingView(ProfileHeaderView), placeholder(height: CGFloat)
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}
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}
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extension ProfileStatusesViewController {
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enum Section: TimelineLikeCollectionViewSection {
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case header
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case pinned
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case statuses
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case footer
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static var entries: Self { .statuses }
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}
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enum Item: TimelineLikeCollectionViewItem {
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typealias TimelineItem = String
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case header(String)
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// the status item must contain the pinned state, since a status can appear in both the pinned and regular sections simultaneously
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case status(id: String, collapseState: CollapseState, filterState: FilterState, pinned: Bool)
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case loadingIndicator
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case confirmLoadMore
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case noContent(accountURL: URL)
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static func fromTimelineItem(_ item: String) -> Self {
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return .status(id: item, collapseState: .unknown, filterState: .unknown, pinned: false)
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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 let (.header(a), .header(b)):
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return a == b
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case let (.status(id: a, _, _, pinned: ap), .status(id: b, _, _, pinned: bp)):
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return a == b && ap == bp
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case (.loadingIndicator, .loadingIndicator):
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return true
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case (.confirmLoadMore, .confirmLoadMore):
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return true
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case (.noContent(let a), .noContent(let b)):
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return a == b
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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 .header(let id):
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hasher.combine(0)
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hasher.combine(id)
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case .status(id: let id, _, _, pinned: let pinned):
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hasher.combine(1)
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hasher.combine(id)
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hasher.combine(pinned)
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case .loadingIndicator:
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hasher.combine(2)
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case .confirmLoadMore:
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hasher.combine(3)
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case .noContent(let accountURL):
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hasher.combine(4)
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hasher.combine(accountURL)
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}
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}
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var hideSeparators: Bool {
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switch self {
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case .loadingIndicator, .confirmLoadMore, .noContent(_):
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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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var isSelectable: Bool {
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switch self {
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case .status(_, _, _, _):
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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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}
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}
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extension ProfileStatusesViewController: TimelineLikeControllerDelegate {
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typealias TimelineItem = String // status ID
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private func request(for range: RequestRange = .default) -> Request<[Status]> {
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switch kind {
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case .statuses:
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return Account.getStatuses(accountID, range: range, onlyMedia: false, pinned: false, excludeReplies: true)
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case .withReplies:
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return Account.getStatuses(accountID, range: range, onlyMedia: false, pinned: false, excludeReplies: false)
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case .onlyMedia:
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return Account.getStatuses(accountID, range: range, onlyMedia: true, pinned: false, excludeReplies: false)
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}
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}
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func loadInitial() async throws -> [String] {
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let request = request()
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let (statuses, _) = try await mastodonController.run(request)
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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 -> [String] {
|
|
guard let newer else {
|
|
throw Error.noNewer
|
|
}
|
|
|
|
let request = request(for: 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 -> [String] {
|
|
guard let older else {
|
|
throw Error.noOlder
|
|
}
|
|
|
|
let request = request(for: older)
|
|
let (statuses, _) = try await mastodonController.run(request)
|
|
|
|
guard !statuses.isEmpty else {
|
|
return []
|
|
}
|
|
|
|
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 noNewer
|
|
case noOlder
|
|
case allCaughtUp
|
|
}
|
|
}
|
|
|
|
extension ProfileStatusesViewController: UICollectionViewDelegate {
|
|
func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
|
|
guard case .statuses = dataSource.sectionIdentifier(for: indexPath.section) 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),
|
|
case .status(id: let id, collapseState: let collapseState, filterState: let filterState, pinned: _) = item else {
|
|
return
|
|
}
|
|
if filterState.isWarning {
|
|
filterer.setResult(.allow, for: filterState)
|
|
collectionView.deselectItem(at: indexPath, animated: true)
|
|
var snapshot = dataSource.snapshot()
|
|
snapshot.reconfigureItems([item])
|
|
dataSource.apply(snapshot, animatingDifferences: true)
|
|
} else {
|
|
let status = mastodonController.persistentContainer.status(for: id)!
|
|
selected(status: status.reblog?.id ?? id, state: collapseState.copy())
|
|
}
|
|
}
|
|
|
|
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 collectionView(_ collectionView: UICollectionView, canFocusItemAt indexPath: IndexPath) -> Bool {
|
|
switch dataSource.itemIdentifier(for: indexPath) {
|
|
case .header(_), .loadingIndicator:
|
|
return false
|
|
default:
|
|
return true
|
|
}
|
|
}
|
|
|
|
#if os(visionOS)
|
|
func collectionView(_ collectionView: UICollectionView, shouldHighlightItemAt indexPath: IndexPath) -> Bool {
|
|
return self.collectionView(collectionView, shouldSelectItemAt: indexPath)
|
|
}
|
|
#endif
|
|
|
|
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
|
|
if reconfigureVisibleItemsOnEndDecelerating {
|
|
reconfigureVisibleItemsOnEndDecelerating = false
|
|
reconfigureVisibleCells()
|
|
}
|
|
}
|
|
}
|
|
|
|
extension ProfileStatusesViewController: UICollectionViewDragDelegate {
|
|
func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
|
|
(collectionView.cellForItem(at: indexPath) as? TimelineStatusCollectionViewCell)?.dragItemsForBeginning(session: session) ?? []
|
|
}
|
|
}
|
|
|
|
extension ProfileStatusesViewController: TuskerNavigationDelegate {
|
|
var apiController: MastodonController! { mastodonController }
|
|
}
|
|
|
|
extension ProfileStatusesViewController: MenuActionProvider {
|
|
}
|
|
|
|
extension ProfileStatusesViewController: 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)
|
|
}
|
|
}
|
|
|
|
func statusCellShowFiltered(_ cell: StatusCollectionViewCell) {
|
|
if let indexPath = collectionView.indexPath(for: cell),
|
|
let item = dataSource.itemIdentifier(for: indexPath),
|
|
case .status(id: _, collapseState: _, filterState: let filterState, pinned: _) = item {
|
|
filterer.setResult(.allow, for: filterState)
|
|
var snapshot = dataSource.snapshot()
|
|
snapshot.reconfigureItems([item])
|
|
dataSource.apply(snapshot, animatingDifferences: true)
|
|
}
|
|
}
|
|
}
|
|
|
|
extension ProfileStatusesViewController: TabBarScrollableViewController {
|
|
func tabBarScrollToTop() {
|
|
collectionView.scrollToTop()
|
|
}
|
|
}
|
|
|
|
extension ProfileStatusesViewController: StatusBarTappableViewController {
|
|
func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {
|
|
collectionView.scrollToTop()
|
|
return .stop
|
|
}
|
|
}
|