624 lines
26 KiB
Swift
624 lines
26 KiB
Swift
//
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// SearchResultsViewController.swift
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// Tusker
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//
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// Created by Shadowfacts on 9/14/19.
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// Copyright © 2019 Shadowfacts. All rights reserved.
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//
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import UIKit
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import Combine
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import Pachyderm
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import WebURLFoundationExtras
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fileprivate let accountCell = "accountCell"
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fileprivate let statusCell = "statusCell"
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fileprivate let hashtagCell = "hashtagCell"
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@MainActor
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protocol SearchResultsViewControllerDelegate: AnyObject {
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func selectedSearchResult(account accountID: String)
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func selectedSearchResult(hashtag: Hashtag)
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func selectedSearchResult(status statusID: String)
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}
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extension SearchResultsViewControllerDelegate {
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func selectedSearchResult(account accountID: String) {}
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func selectedSearchResult(hashtag: Hashtag) {}
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func selectedSearchResult(status statusID: String) {}
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}
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class SearchResultsViewController: UIViewController, CollectionViewController {
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let mastodonController: MastodonController
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weak var exploreNavigationController: UINavigationController?
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weak var delegate: SearchResultsViewControllerDelegate?
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var tokenHandler: ((String, SearchOperatorType) -> Void)?
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var collectionView: UICollectionView! { view as? UICollectionView }
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private var dataSource: UICollectionViewDiffableDataSource<Section, Item>!
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/// Types of results to search for.
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var scope: Scope
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/// Whether to limit results to accounts the users is following.
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var following: Bool? = nil
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private let searchSubject = PassthroughSubject<String?, Never>()
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private var searchCancellable: AnyCancellable?
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private var currentQuery: String?
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private var currentSearchResults: SearchResults?
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init(mastodonController: MastodonController, scope: Scope = .all) {
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self.mastodonController = mastodonController
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self.scope = scope
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super.init(nibName: nil, bundle: nil)
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title = NSLocalizedString("Search", comment: "search screen title")
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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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let layout = UICollectionViewCompositionalLayout { [unowned self] sectionIndex, environment in
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let sectionIdentifier = self.dataSource.sectionIdentifier(for: sectionIndex)!
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switch sectionIdentifier {
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case .tokenSuggestions(_):
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let itemSize = NSCollectionLayoutSize(widthDimension: .estimated(100), heightDimension: .absolute(30))
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let item = NSCollectionLayoutItem(layoutSize: itemSize)
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let group = NSCollectionLayoutGroup.horizontal(layoutSize: itemSize, subitems: [item])
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let section = NSCollectionLayoutSection(group: group)
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section.orthogonalScrollingBehavior = .continuousGroupLeadingBoundary
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section.interGroupSpacing = 8
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section.contentInsets = NSDirectionalEdgeInsets(top: sectionIndex == 0 ? 16 : 4, leading: 16, bottom: 4, trailing: 16)
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return section
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case .loadingIndicator:
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var config = UICollectionLayoutListConfiguration(appearance: .grouped)
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config.backgroundColor = .appGroupedBackground
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config.showsSeparators = false
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config.headerMode = .none
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return .list(using: config, layoutEnvironment: environment)
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case .accounts, .hashtags, .statuses:
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var config = UICollectionLayoutListConfiguration(appearance: .grouped)
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config.backgroundColor = .appGroupedBackground
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config.headerMode = .supplementary
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config.leadingSwipeActionsConfigurationProvider = { [unowned self] in
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(self.collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.leadingSwipeActions()
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}
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config.trailingSwipeActionsConfigurationProvider = { [unowned self] in
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(self.collectionView.cellForItem(at: $0) as? TimelineStatusCollectionViewCell)?.trailingSwipeActions()
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}
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if sectionIdentifier == .statuses {
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config.separatorConfiguration.topSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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config.separatorConfiguration.bottomSeparatorInsets = TimelineStatusCollectionViewCell.separatorInsets
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}
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// we don't use the readable content inset here, because it insets the entire cell, rather than just the content
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// so the cell backgrounds not being full width looks weird
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return .list(using: config, 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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collectionView.backgroundColor = .appGroupedBackground
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#if !os(visionOS)
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collectionView.keyboardDismissMode = .interactive
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#endif
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dataSource = createDataSource()
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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searchCancellable = searchSubject
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.debounce(for: .seconds(1), scheduler: RunLoop.main)
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.map { $0?.trimmingCharacters(in: .whitespacesAndNewlines) }
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.sink { [unowned self] in self.performSearch(query: $0) }
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userActivity = UserActivityManager.searchActivity(query: nil, accountID: mastodonController.accountInfo!.id)
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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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let sectionHeader = UICollectionView.SupplementaryRegistration<UICollectionViewListCell>(elementKind: UICollectionView.elementKindSectionHeader) { [unowned self] supplementaryView, elementKind, indexPath in
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let section = self.dataSource.sectionIdentifier(for: indexPath.section)!
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var config = UIListContentConfiguration.groupedHeader()
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config.text = section.displayName
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supplementaryView.contentConfiguration = config
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}
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let tokenSuggestionCell = UICollectionView.CellRegistration<SearchTokenSuggestionCollectionViewCell, String> { cell, indexPath, itemIdentifier in
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cell.setText(itemIdentifier)
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}
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let loadingCell = UICollectionView.CellRegistration<LoadingCollectionViewCell, Void> { cell, indexPath, itemIdentifier in
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cell.indicator.startAnimating()
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}
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let accountCell = UICollectionView.CellRegistration<AccountCollectionViewCell, String> { cell, indexPath, itemIdentifier in
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cell.delegate = self
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cell.updateUI(accountID: itemIdentifier)
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}
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let hashtagCell = UICollectionView.CellRegistration<TrendingHashtagCollectionViewCell, Hashtag> { cell, indexPath, itemIdentifier in
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cell.updateUI(hashtag: itemIdentifier)
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}
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let statusCell = UICollectionView.CellRegistration<TimelineStatusCollectionViewCell, (String, CollapseState)> { [unowned self] cell, indexPath, itemIdentifier in
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cell.delegate = self
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cell.updateUI(statusID: itemIdentifier.0, state: itemIdentifier.1, filterResult: .allow, precomputedContent: nil)
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}
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let dataSource = UICollectionViewDiffableDataSource<Section, Item>(collectionView: collectionView) { collectionView, indexPath, itemIdentifier in
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let cell: UICollectionViewCell
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switch itemIdentifier {
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case .tokenSuggestion(let value):
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return collectionView.dequeueConfiguredReusableCell(using: tokenSuggestionCell, for: indexPath, item: value)
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case .loadingIndicator:
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return collectionView.dequeueConfiguredReusableCell(using: loadingCell, for: indexPath, item: ())
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case .account(let accountID):
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cell = collectionView.dequeueConfiguredReusableCell(using: accountCell, for: indexPath, item: accountID)
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case .hashtag(let hashtag):
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cell = collectionView.dequeueConfiguredReusableCell(using: hashtagCell, for: indexPath, item: hashtag)
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case .status(let id, let state):
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cell = collectionView.dequeueConfiguredReusableCell(using: statusCell, for: indexPath, item: (id, state))
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}
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cell.configurationUpdateHandler = { cell, state in
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cell.backgroundConfiguration = .appListGroupedCell(for: state)
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}
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return cell
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}
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dataSource.supplementaryViewProvider = { collectionView, elementKind, indexPath in
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if elementKind == UICollectionView.elementKindSectionHeader {
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return collectionView.dequeueConfiguredReusableSupplementary(using: sectionHeader, for: indexPath)
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} else {
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return nil
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}
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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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}
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override func targetViewController(forAction action: Selector, sender: Any?) -> UIViewController? {
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// if we're showing a view controller, we need to go up to the explore VC's nav controller
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// the UISearchController that is our parent is not part of the normal VC hierarchy and itself doesn't have a parent
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if action == #selector(UIViewController.show(_:sender:)),
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let exploreNavController = exploreNavigationController {
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return exploreNavController
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}
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return super.targetViewController(forAction: action, sender: sender)
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}
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func updateTokenSuggestions(_ suggestions: [(SearchOperatorType, [String])], animated: Bool) {
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var snapshot = dataSource.snapshot()
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var prev: Section?
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for (op, values) in suggestions {
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let section = Section.tokenSuggestions(op)
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if values.isEmpty {
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if snapshot.sectionIdentifiers.contains(section) {
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snapshot.deleteSections([section])
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}
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} else {
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if !snapshot.sectionIdentifiers.contains(section) {
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if let prev {
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snapshot.insertSections([section], afterSection: prev)
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} else if let first = snapshot.sectionIdentifiers.first {
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snapshot.insertSections([section], beforeSection: first)
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} else {
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snapshot.appendSections([section])
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}
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} else {
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snapshot.deleteItems(snapshot.itemIdentifiers(inSection: section))
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}
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snapshot.appendItems(values.map { .tokenSuggestion($0) }, toSection: section)
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prev = section
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}
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}
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dataSource.apply(snapshot, animatingDifferences: animated)
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}
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func removeResults() {
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var snapshot = dataSource.snapshot()
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removeResults(from: &snapshot)
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dataSource.apply(snapshot, animatingDifferences: false)
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}
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private func removeResults(from snapshot: inout NSDiffableDataSourceSnapshot<Section, Item>) {
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snapshot.deleteSections([Section.loadingIndicator, .accounts, .hashtags, .statuses].filter { snapshot.sectionIdentifiers.contains($0) })
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}
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func loadResults(from source: SearchResultsViewController) {
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currentQuery = source.currentQuery
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if let sourceDataSource = source.dataSource {
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dataSource.apply(sourceDataSource.snapshot())
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}
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}
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func performSearch(query: String?) {
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guard isViewLoaded,
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query != currentQuery else {
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return
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}
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guard let query = query, !query.isEmpty else {
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removeResults()
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return
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}
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self.currentQuery = query
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var snapshot = dataSource.snapshot()
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removeResults(from: &snapshot)
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snapshot.appendSections([.loadingIndicator])
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snapshot.appendItems([.loadingIndicator])
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dataSource.apply(snapshot)
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let request = Client.search(query: query, types: scope.resultTypes, resolve: true, limit: 10, following: following)
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mastodonController.run(request) { (response) in
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switch response {
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case let .success(results, _):
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guard self.currentQuery == query else { return }
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self.mastodonController.persistentContainer.performBatchUpdates { (context, addAccounts, addStatuses) in
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addAccounts(results.accounts)
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addStatuses(results.statuses)
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} completion: {
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DispatchQueue.main.async {
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self.showSearchResults(results)
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}
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}
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case let .failure(error):
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DispatchQueue.main.async {
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self.showSearchError(error)
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}
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}
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}
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}
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@MainActor
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private func showSearchResults(_ results: SearchResults) {
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self.currentSearchResults = results
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var snapshot = dataSource.snapshot()
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snapshot.deleteSections([.loadingIndicator])
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removeResults(from: &snapshot)
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let resultTypes = self.scope.resultTypes
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if !results.accounts.isEmpty && resultTypes.contains(.accounts) {
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snapshot.appendSections([.accounts])
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snapshot.appendItems(results.accounts.map { .account($0.id) }, toSection: .accounts)
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}
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if !results.hashtags.isEmpty && resultTypes.contains(.hashtags) {
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snapshot.appendSections([.hashtags])
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snapshot.appendItems(results.hashtags.map { .hashtag($0) }, toSection: .hashtags)
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}
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if !results.statuses.isEmpty && resultTypes.contains(.statuses) {
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snapshot.appendSections([.statuses])
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snapshot.appendItems(results.statuses.map { .status($0.id, .unknown) }, toSection: .statuses)
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}
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dataSource.apply(snapshot)
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}
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private func showSearchError(_ error: Client.Error) {
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let snapshot = NSDiffableDataSourceSnapshot<Section, Item>()
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dataSource.apply(snapshot)
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let config = ToastConfiguration(from: error, with: "Error Searching", in: self) { [unowned self] toast in
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toast.dismissToast(animated: true)
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self.performSearch(query: self.currentQuery)
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}
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showToast(configuration: config, animated: true)
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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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.map { id in
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Item.status(id, .unknown)
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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 SearchResultsViewController {
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enum Scope: CaseIterable {
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case all
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case people
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case hashtags
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case posts
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var title: String {
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switch self {
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case .all:
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return "All"
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case .people:
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return "People"
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case .hashtags:
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return "Hashtags"
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case .posts:
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return "Posts"
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}
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}
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var resultTypes: [SearchResultType] {
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switch self {
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case .all:
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return [.accounts, .statuses, .hashtags]
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case .people:
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return [.accounts]
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case .hashtags:
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return [.hashtags]
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case .posts:
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return [.statuses]
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}
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}
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}
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}
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extension SearchResultsViewController {
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enum Section: Hashable, Sendable {
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case tokenSuggestions(SearchOperatorType)
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case loadingIndicator
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case accounts
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case hashtags
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case statuses
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var displayName: String? {
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switch self {
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case .tokenSuggestions:
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return nil
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case .loadingIndicator:
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return nil
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case .accounts:
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return NSLocalizedString("People", comment: "accounts search results section")
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case .hashtags:
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return NSLocalizedString("Hashtags", comment: "hashtag search results section")
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case .statuses:
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return NSLocalizedString("Posts", comment: "statuses search results section")
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}
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}
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}
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enum Item: Hashable, Sendable {
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case tokenSuggestion(String)
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case loadingIndicator
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case account(String)
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case hashtag(Hashtag)
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case status(String, CollapseState)
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func hash(into hasher: inout Hasher) {
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switch self {
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case let .tokenSuggestion(value):
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hasher.combine("tokenSuggestion")
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hasher.combine(value)
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case .loadingIndicator:
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hasher.combine("loadingIndicator")
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case let .account(id):
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hasher.combine("account")
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hasher.combine(id)
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case let .hashtag(hashtag):
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hasher.combine("hashtag")
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hasher.combine(hashtag.url)
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case let .status(id, _):
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hasher.combine("status")
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hasher.combine(id)
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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 (.tokenSuggestion(let a), .tokenSuggestion(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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case (.account(let a), .account(let b)):
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return a == b
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case (.hashtag(let a), .hashtag(let b)):
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return a.name == b.name
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case (.status(let a, _), .status(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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}
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}
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extension SearchResultsViewController: UICollectionViewDelegate {
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func collectionView(_ collectionView: UICollectionView, shouldSelectItemAt indexPath: IndexPath) -> Bool {
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switch dataSource.itemIdentifier(for: indexPath) {
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case .loadingIndicator:
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return false
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default:
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return true
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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, .loadingIndicator:
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return
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case .tokenSuggestion(let value):
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guard case .tokenSuggestions(let op) = dataSource.sectionIdentifier(for: indexPath.section) else {
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return
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}
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tokenHandler?(value, op)
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collectionView.deselectItem(at: indexPath, animated: true)
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case let .account(id):
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if let delegate {
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delegate.selectedSearchResult(account: id)
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} else {
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selected(account: id)
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}
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case let .hashtag(hashtag):
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if let delegate {
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delegate.selectedSearchResult(hashtag: hashtag)
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} else {
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selected(tag: hashtag)
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}
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case let .status(id, state):
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if let delegate {
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delegate.selectedSearchResult(status: id)
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} else {
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selected(status: id, state: state.copy())
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}
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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 .loadingIndicator, .tokenSuggestion(_):
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return nil
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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 .hashtag(let tag):
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return UIContextMenuConfiguration {
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HashtagTimelineViewController(for: tag, mastodonController: self.mastodonController)
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} actionProvider: { _ in
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UIMenu(children: self.actionsForHashtag(tag, source: .view(cell)))
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}
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case .status(_, _):
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return (cell as? TimelineStatusCollectionViewCell)?.contextMenuConfiguration()
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}
|
|
}
|
|
|
|
func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating) {
|
|
MenuPreviewHelper.willPerformPreviewAction(animator: animator, presenter: self)
|
|
}
|
|
}
|
|
|
|
extension SearchResultsViewController: UICollectionViewDragDelegate {
|
|
func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
|
|
guard let accountInfo = mastodonController.accountInfo,
|
|
let item = dataSource.itemIdentifier(for: indexPath) else {
|
|
return []
|
|
}
|
|
let url: URL
|
|
let activity: NSUserActivity
|
|
switch item {
|
|
case .loadingIndicator, .tokenSuggestion(_):
|
|
return []
|
|
case .account(let id):
|
|
guard let account = mastodonController.persistentContainer.account(for: id) else {
|
|
return []
|
|
}
|
|
url = account.url
|
|
activity = UserActivityManager.showProfileActivity(id: id, accountID: accountInfo.id)
|
|
case .hashtag(let tag):
|
|
url = URL(tag.url)!
|
|
activity = UserActivityManager.showTimelineActivity(timeline: .tag(hashtag: tag.name), accountID: accountInfo.id)!
|
|
case .status(let id, _):
|
|
guard let status = mastodonController.persistentContainer.status(for: id),
|
|
status.url != nil else {
|
|
return []
|
|
}
|
|
url = status.url!
|
|
activity = UserActivityManager.showConversationActivity(mainStatusID: id, accountID: accountInfo.id)
|
|
}
|
|
activity.displaysAuxiliaryScene = true
|
|
let provider = NSItemProvider(object: url as NSURL)
|
|
provider.registerObject(activity, visibility: .all)
|
|
return [UIDragItem(itemProvider: provider)]
|
|
}
|
|
}
|
|
|
|
extension SearchResultsViewController: UISearchResultsUpdating {
|
|
func updateSearchResults(for searchController: UISearchController) {
|
|
searchSubject.send(searchController.searchBar.searchQueryWithOperators)
|
|
}
|
|
}
|
|
|
|
extension SearchResultsViewController: UISearchBarDelegate {
|
|
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
|
|
var snapshot = dataSource.snapshot()
|
|
let allSuggestionSections = snapshot.sectionIdentifiers.filter {
|
|
if case .tokenSuggestions(_) = $0 {
|
|
return true
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
snapshot.deleteSections(allSuggestionSections)
|
|
dataSource.apply(snapshot, animatingDifferences: true)
|
|
|
|
// perform a search immedaitely when the search button is pressed
|
|
performSearch(query: searchBar.searchQueryWithOperators)
|
|
}
|
|
|
|
func searchBar(_ searchBar: UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) {
|
|
let newQuery = searchBar.searchQueryWithOperators
|
|
let newScope = Scope.allCases[selectedScope]
|
|
if currentQuery == newQuery,
|
|
let currentSearchResults {
|
|
if self.scope == .all {
|
|
self.scope = newScope
|
|
var snapshot = dataSource.snapshot()
|
|
if snapshot.sectionIdentifiers.contains(.accounts) && scope != .people {
|
|
snapshot.deleteSections([.accounts])
|
|
}
|
|
if snapshot.sectionIdentifiers.contains(.hashtags) && scope != .hashtags {
|
|
snapshot.deleteSections([.hashtags])
|
|
}
|
|
if snapshot.sectionIdentifiers.contains(.statuses) && scope != .posts {
|
|
snapshot.deleteSections([.statuses])
|
|
}
|
|
dataSource.apply(snapshot)
|
|
} else {
|
|
self.scope = newScope
|
|
showSearchResults(currentSearchResults)
|
|
}
|
|
} else {
|
|
self.scope = newScope
|
|
performSearch(query: newQuery)
|
|
}
|
|
}
|
|
}
|
|
|
|
extension SearchResultsViewController: TuskerNavigationDelegate {
|
|
var apiController: MastodonController! { mastodonController }
|
|
}
|
|
|
|
extension SearchResultsViewController: ToastableViewController {
|
|
}
|
|
|
|
extension SearchResultsViewController: MenuActionProvider {
|
|
}
|
|
|
|
extension SearchResultsViewController: 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) {
|
|
// not yet supported
|
|
}
|
|
}
|