424 lines
17 KiB
Swift
424 lines
17 KiB
Swift
//
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// StatusActionAccountListCollectionViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 9/5/19.
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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 Pachyderm
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class StatusActionAccountListCollectionViewController: UIViewController, CollectionViewController {
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private static let pageSize = 40
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private let statusID: String
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private let actionType: StatusActionAccountListViewController.ActionType
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private let mastodonController: MastodonController
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private var needsInaccurateCountWarning = false
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var collectionView: UICollectionView! {
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view as? UICollectionView
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}
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private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
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private var state: State = .unloaded
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private var older: RequestRange?
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/**
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Creates a new view controller showing the accounts that performed the given action on the given status.
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- Parameter mastodonController The `MastodonController` instance this view controller uses.
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*/
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init(statusID: String, actionType: StatusActionAccountListViewController.ActionType, mastodonController: MastodonController) {
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self.statusID = statusID
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self.actionType = actionType
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self.mastodonController = mastodonController
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super.init(nibName: nil, bundle: nil)
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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 accountsConfig = UICollectionLayoutListConfiguration(appearance: .grouped)
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accountsConfig.backgroundColor = .appGroupedBackground
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accountsConfig.itemSeparatorHandler = { [unowned self] indexPath, sectionConfig in
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guard let item = self.dataSource.itemIdentifier(for: indexPath) else {
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return sectionConfig
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}
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var config = sectionConfig
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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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}
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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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switch dataSource.sectionIdentifier(for: sectionIndex)! {
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case .status:
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var config = UICollectionLayoutListConfiguration(appearance: .grouped)
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config.footerMode = self.needsInaccurateCountWarning ? .supplementary : .none
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config.backgroundColor = .appGroupedBackground
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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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return NSCollectionLayoutSection.list(using: config, layoutEnvironment: environment)
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case .accounts:
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return NSCollectionLayoutSection.list(using: accountsConfig, layoutEnvironment: environment)
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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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dataSource = createDataSource()
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}
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private func createDataSource() -> UICollectionViewDiffableDataSource<Section, Item> {
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let statusCell = UICollectionView.CellRegistration<TimelineStatusCollectionViewCell, (String, CollapseState)> { [unowned self] cell, indexPath, item in
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cell.delegate = self
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cell.updateUI(statusID: item.0, state: item.1, filterResult: .allow, precomputedContent: nil)
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cell.configurationUpdateHandler = { cell, state in
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var config = UIBackgroundConfiguration.listGroupedCell().updated(for: state)
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if state.isHighlighted || state.isSelected {
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config.backgroundColor = .appSelectedCellBackground
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} else {
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config.backgroundColor = .appGroupedCellBackground
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}
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cell.backgroundConfiguration = config
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}
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}
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let accountCell = UICollectionView.CellRegistration<AccountCollectionViewCell, String> { [unowned self] cell, indexPath, item in
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cell.delegate = self
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cell.updateUI(accountID: item)
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cell.configurationUpdateHandler = { cell, state in
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var config = UIBackgroundConfiguration.listGroupedCell().updated(for: state)
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if state.isHighlighted || state.isSelected {
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config.backgroundColor = .appSelectedCellBackground
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} else {
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config.backgroundColor = .appGroupedCellBackground
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}
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cell.backgroundConfiguration = config
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}
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}
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let loadingCell = UICollectionView.CellRegistration<LoadingCollectionViewCell, Void> { cell, indexPath, item in
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cell.indicator.startAnimating()
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}
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let dataSource = UICollectionViewDiffableDataSource<Section, Item>(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
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switch itemIdentifier {
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case .status(let id, let state):
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return collectionView.dequeueConfiguredReusableCell(using: statusCell, for: indexPath, item: (id, state))
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case .account(let id):
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return collectionView.dequeueConfiguredReusableCell(using: accountCell, for: indexPath, item: id)
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case .loadingIndicator:
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return collectionView.dequeueConfiguredReusableCell(using: loadingCell, for: indexPath, item: ())
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}
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}
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let sectionHeaderCell = UICollectionView.SupplementaryRegistration<UICollectionViewListCell>(elementKind: UICollectionView.elementKindSectionFooter) { (headerView, collectionView, indexPath) in
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var config = headerView.defaultContentConfiguration()
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config.text = NSLocalizedString("Favorite and reblog counts for posts originating from instances other than your own may not be accurate.", comment: "shown on lists of status total actions")
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headerView.contentConfiguration = config
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}
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dataSource.supplementaryViewProvider = { collectionView, elementKind, indexPath in
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return collectionView.dequeueConfiguredReusableSupplementary(using: sectionHeaderCell, for: indexPath)
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}
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return dataSource
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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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if case .unloaded = state {
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Task {
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await loadAccounts()
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}
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}
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}
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func addStatus(_ status: StatusMO, state: CollapseState, showInaccurateCountWarning: Bool) {
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loadViewIfNeeded()
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needsInaccurateCountWarning = showInaccurateCountWarning && status.url?.host != mastodonController.instanceURL.host
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var snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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snapshot.appendSections([.status, .accounts])
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snapshot.appendItems([.status(status.id, state)], toSection: .status)
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dataSource.apply(snapshot, animatingDifferences: false)
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}
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func setAccounts(_ accountIDs: [String], animated: Bool) {
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guard case .unloaded = state else {
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return
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}
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var snapshot = dataSource.snapshot()
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snapshot.appendItems(accountIDs.map { .account($0) }, toSection: .accounts)
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dataSource.apply(snapshot, animatingDifferences: animated)
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self.state = .loaded
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}
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private func request(for range: RequestRange) -> Request<[Account]> {
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switch actionType {
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case .favorite:
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return Status.getFavourites(statusID, range: range.withCount(Self.pageSize))
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case .reblog:
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return Status.getReblogs(statusID, range: range.withCount(Self.pageSize))
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}
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}
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func apply(snapshot: NSDiffableDataSourceSnapshot<Section, Item>) async {
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await Task { @MainActor in
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self.dataSource.apply(snapshot)
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}.value
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}
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@MainActor
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private func loadAccounts() async {
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guard case .unloaded = state else {
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return
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}
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self.state = .loadingInitial
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var snapshot = dataSource.snapshot()
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snapshot.appendItems([.loadingIndicator], toSection: .accounts)
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await apply(snapshot: snapshot)
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do {
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let (accounts, pagination) = try await mastodonController.run(request(for: .default))
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await mastodonController.persistentContainer.addAll(accounts: accounts)
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guard case .loadingInitial = self.state else {
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return
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}
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self.state = .loaded
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self.older = pagination?.older
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var snapshot = dataSource.snapshot()
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snapshot.deleteItems([.loadingIndicator])
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snapshot.appendItems(accounts.map { .account($0.id) }, toSection: .accounts)
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await apply(snapshot: snapshot)
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} catch {
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self.state = .unloaded
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let config = ToastConfiguration(from: error, with: "Error Loading Accounts", in: self) { toast in
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toast.dismissToast(animated: true)
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await self.loadAccounts()
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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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@MainActor
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private func loadOlder() async {
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guard case .loaded = state,
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let older else {
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return
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}
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self.state = .loadingOlder
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var snapshot = self.dataSource.snapshot()
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snapshot.appendItems([.loadingIndicator], toSection: .accounts)
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await apply(snapshot: snapshot)
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do {
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let (accounts, pagination) = try await mastodonController.run(request(for: older))
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await mastodonController.persistentContainer.addAll(accounts: accounts)
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guard case .loadingOlder = self.state else {
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return
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}
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self.state = .loaded
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self.older = pagination?.older
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var snapshot = dataSource.snapshot()
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snapshot.deleteItems([.loadingIndicator])
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snapshot.appendItems(accounts.map { .account($0.id) }, toSection: .accounts)
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await apply(snapshot: snapshot)
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} catch {
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self.state = .loaded
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let config = ToastConfiguration(from: error, with: "Error Loading More", in: self) { [unowned self] toast in
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toast.dismissToast(animated: true)
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await self.loadOlder()
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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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}
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extension StatusActionAccountListCollectionViewController {
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enum State {
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case unloaded
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case loadingInitial
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case loaded
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case loadingOlder
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}
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}
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extension StatusActionAccountListCollectionViewController {
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enum Section {
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case status
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case accounts
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}
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enum Item: Hashable {
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case status(String, CollapseState)
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case account(String)
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case loadingIndicator
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var hideSeparators: Bool {
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switch self {
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case .loadingIndicator:
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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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static func ==(lhs: Item, rhs: Item) -> Bool {
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switch (lhs, rhs) {
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case (.status(let a, _), .status(let b, _)):
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return a == b
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case (.account(let a), .account(let b)):
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return a == b
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case (.loadingIndicator, .loadingIndicator):
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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 .status(let id, _):
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hasher.combine(0)
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hasher.combine(id)
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case .account(let id):
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hasher.combine(1)
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hasher.combine(id)
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case .loadingIndicator:
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hasher.combine(2)
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}
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}
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}
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}
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extension StatusActionAccountListCollectionViewController: UICollectionViewDelegate {
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func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
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if indexPath.section == collectionView.numberOfSections - 1,
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indexPath.row == collectionView.numberOfItems(inSection: indexPath.section) - 1 {
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Task {
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await self.loadOlder()
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}
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}
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}
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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switch dataSource.itemIdentifier(for: indexPath) {
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case nil:
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return
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case .status(let id, let state):
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selected(status: id, state: state.copy())
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case .account(let id):
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selected(account: id)
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case .loadingIndicator:
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return
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}
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}
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func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
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guard let item = dataSource.itemIdentifier(for: indexPath),
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let cell = collectionView.cellForItem(at: indexPath) else {
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return nil
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}
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switch item {
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case .status:
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return (cell as? TimelineStatusCollectionViewCell)?.contextMenuConfiguration()
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case .account(let id):
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return UIContextMenuConfiguration {
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ProfileViewController(accountID: id, mastodonController: self.mastodonController)
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} actionProvider: { _ in
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UIMenu(children: self.actionsForProfile(accountID: id, source: .view(cell)))
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}
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case .loadingIndicator:
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return nil
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}
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}
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func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
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MenuPreviewHelper.willPerformPreviewAction(animator: animator, presenter: self)
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}
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}
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extension StatusActionAccountListCollectionViewController: UICollectionViewDragDelegate {
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func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
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guard let currentAccountID = mastodonController.accountInfo?.id,
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let item = dataSource.itemIdentifier(for: indexPath) else {
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return []
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}
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let provider: NSItemProvider
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switch item {
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case .status(let id, _):
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guard let status = mastodonController.persistentContainer.status(for: id) else {
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return []
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}
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provider = NSItemProvider(object: status.url! as NSURL)
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let activity = UserActivityManager.showConversationActivity(mainStatusID: id, accountID: currentAccountID)
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activity.displaysAuxiliaryScene = true
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provider.registerObject(activity, visibility: .all)
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case .account(let id):
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guard let account = mastodonController.persistentContainer.account(for: id) else {
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return []
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}
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provider = NSItemProvider(object: account.url as NSURL)
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let activity = UserActivityManager.showProfileActivity(id: account.id, accountID: currentAccountID)
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activity.displaysAuxiliaryScene = true
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provider.registerObject(activity, visibility: .all)
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case .loadingIndicator:
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return []
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}
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return [UIDragItem(itemProvider: provider)]
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}
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}
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extension StatusActionAccountListCollectionViewController: TuskerNavigationDelegate {
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var apiController: MastodonController! { mastodonController }
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}
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extension StatusActionAccountListCollectionViewController: MenuActionProvider {
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}
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extension StatusActionAccountListCollectionViewController: StatusCollectionViewCellDelegate {
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func statusCellNeedsReconfigure(_ cell: StatusCollectionViewCell, animated: Bool, completion: (() -> Void)?) {
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if let indexPath = collectionView.indexPath(for: cell) {
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var snapshot = dataSource.snapshot()
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snapshot.reconfigureItems([dataSource.itemIdentifier(for: indexPath)!])
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dataSource.apply(snapshot, animatingDifferences: animated, completion: completion)
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}
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}
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func statusCellShowFiltered(_ cell: StatusCollectionViewCell) {
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fatalError()
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}
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}
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extension StatusActionAccountListCollectionViewController: StatusBarTappableViewController {
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func handleStatusBarTapped(xPosition: CGFloat) -> StatusBarTapActionResult {
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collectionView.scrollToTop()
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return .stop
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}
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}
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