294 lines
11 KiB
Swift
294 lines
11 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import UIKit
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import SignalUtilitiesKit
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public class ConversationSearchController: NSObject {
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public static let minimumSearchTextLength: UInt = 2
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private let threadId: String
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public weak var delegate: ConversationSearchControllerDelegate?
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public let uiSearchController: UISearchController = UISearchController(searchResultsController: nil)
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public let resultsBar: SearchResultsBar = SearchResultsBar()
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private var lastSearchText: String?
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// MARK: Initializer
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public init(threadId: String) {
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self.threadId = threadId
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super.init()
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self.resultsBar.resultsBarDelegate = self
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self.uiSearchController.delegate = self
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self.uiSearchController.searchResultsUpdater = self
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self.uiSearchController.hidesNavigationBarDuringPresentation = false
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self.uiSearchController.searchBar.inputAccessoryView = resultsBar
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}
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}
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// MARK: - UISearchControllerDelegate
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extension ConversationSearchController: UISearchControllerDelegate {
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public func didPresentSearchController(_ searchController: UISearchController) {
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delegate?.didPresentSearchController?(searchController)
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}
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public func didDismissSearchController(_ searchController: UISearchController) {
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delegate?.didDismissSearchController?(searchController)
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}
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}
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// MARK: - UISearchResultsUpdating
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extension ConversationSearchController: UISearchResultsUpdating {
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public func updateSearchResults(for searchController: UISearchController) {
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Logger.verbose("searchBar.text: \( searchController.searchBar.text ?? "<blank>")")
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guard
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let searchText: String = searchController.searchBar.text?.stripped,
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searchText.count >= ConversationSearchController.minimumSearchTextLength
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else {
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self.resultsBar.updateResults(results: nil)
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self.delegate?.conversationSearchController(self, didUpdateSearchResults: nil, searchText: nil)
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return
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}
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let threadId: String = self.threadId
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let results: [Int64] = Storage.shared.read { db -> [Int64] in
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try Interaction.idsForTermWithin(
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threadId: threadId,
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pattern: try SessionThreadViewModel.pattern(db, searchTerm: searchText)
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)
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.fetchAll(db)
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}
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.defaulting(to: [])
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self.resultsBar.updateResults(results: results)
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self.delegate?.conversationSearchController(self, didUpdateSearchResults: results, searchText: searchText)
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}
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}
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// MARK: - SearchResultsBarDelegate
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extension ConversationSearchController: SearchResultsBarDelegate {
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func searchResultsBar(
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_ searchResultsBar: SearchResultsBar,
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setCurrentIndex currentIndex: Int,
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results: [Int64]
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) {
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guard let interactionId: Int64 = results[safe: currentIndex] else { return }
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self.delegate?.conversationSearchController(self, didSelectInteractionId: interactionId)
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}
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}
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protocol SearchResultsBarDelegate: AnyObject {
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func searchResultsBar(
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_ searchResultsBar: SearchResultsBar,
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setCurrentIndex currentIndex: Int,
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results: [Int64]
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)
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}
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public final class SearchResultsBar: UIView {
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private var results: [Int64]?
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var currentIndex: Int?
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weak var resultsBarDelegate: SearchResultsBarDelegate?
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public override var intrinsicContentSize: CGSize { CGSize.zero }
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private lazy var label: UILabel = {
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let result = UILabel()
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result.font = .boldSystemFont(ofSize: Values.smallFontSize)
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result.textColor = Colors.text
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return result
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}()
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private lazy var upButton: UIButton = {
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let icon = #imageLiteral(resourceName: "ic_chevron_up").withRenderingMode(.alwaysTemplate)
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let result = UIButton()
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result.setImage(icon, for: UIControl.State.normal)
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result.tintColor = Colors.accent
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result.addTarget(self, action: #selector(handleUpButtonTapped), for: UIControl.Event.touchUpInside)
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return result
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}()
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private lazy var downButton: UIButton = {
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let icon = #imageLiteral(resourceName: "ic_chevron_down").withRenderingMode(.alwaysTemplate)
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let result = UIButton()
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result.setImage(icon, for: UIControl.State.normal)
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result.tintColor = Colors.accent
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result.addTarget(self, action: #selector(handleDownButtonTapped), for: UIControl.Event.touchUpInside)
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return result
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}()
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private lazy var loadingIndicator: UIActivityIndicatorView = {
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let result = UIActivityIndicatorView(style: .medium)
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result.tintColor = Colors.text
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result.alpha = 0.5
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result.hidesWhenStopped = true
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return result
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}()
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override init(frame: CGRect) {
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super.init(frame: frame)
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setUpViewHierarchy()
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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setUpViewHierarchy()
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}
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private func setUpViewHierarchy() {
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autoresizingMask = .flexibleHeight
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// Background & blur
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let backgroundView = UIView()
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backgroundView.backgroundColor = isLightMode ? .white : .black
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backgroundView.alpha = Values.lowOpacity
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addSubview(backgroundView)
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backgroundView.pin(to: self)
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let blurView = UIVisualEffectView(effect: UIBlurEffect(style: .regular))
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addSubview(blurView)
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blurView.pin(to: self)
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// Separator
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let separator = UIView()
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separator.backgroundColor = Colors.text.withAlphaComponent(0.2)
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separator.set(.height, to: 1 / UIScreen.main.scale)
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addSubview(separator)
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separator.pin([ UIView.HorizontalEdge.leading, UIView.VerticalEdge.top, UIView.HorizontalEdge.trailing ], to: self)
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// Spacers
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let spacer1 = UIView.hStretchingSpacer()
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let spacer2 = UIView.hStretchingSpacer()
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// Button containers
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let upButtonContainer = UIView(wrapping: upButton, withInsets: UIEdgeInsets(top: 2, left: 0, bottom: 0, right: 0))
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let downButtonContainer = UIView(wrapping: downButton, withInsets: UIEdgeInsets(top: 0, left: 0, bottom: 2, right: 0))
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// Main stack view
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let mainStackView = UIStackView(arrangedSubviews: [ upButtonContainer, downButtonContainer, spacer1, label, spacer2 ])
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mainStackView.axis = .horizontal
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mainStackView.spacing = Values.mediumSpacing
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mainStackView.isLayoutMarginsRelativeArrangement = true
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mainStackView.layoutMargins = UIEdgeInsets(top: Values.smallSpacing, leading: Values.largeSpacing, bottom: Values.smallSpacing, trailing: Values.largeSpacing)
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addSubview(mainStackView)
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mainStackView.pin(.top, to: .bottom, of: separator)
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mainStackView.pin([ UIView.HorizontalEdge.leading, UIView.HorizontalEdge.trailing ], to: self)
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mainStackView.pin(.bottom, to: .bottom, of: self, withInset: -2)
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addSubview(loadingIndicator)
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loadingIndicator.pin(.left, to: .right, of: label, withInset: 10)
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loadingIndicator.centerYAnchor.constraint(equalTo: label.centerYAnchor).isActive = true
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// Remaining constraints
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label.center(.horizontal, in: self)
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}
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// MARK: - Functions
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@objc
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public func handleUpButtonTapped() {
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guard let results: [Int64] = results else { return }
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guard let currentIndex: Int = currentIndex else { return }
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guard currentIndex + 1 < results.count else { return }
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let newIndex = currentIndex + 1
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self.currentIndex = newIndex
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updateBarItems()
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resultsBarDelegate?.searchResultsBar(self, setCurrentIndex: newIndex, results: results)
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}
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@objc
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public func handleDownButtonTapped() {
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Logger.debug("")
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guard let results: [Int64] = results else { return }
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guard let currentIndex: Int = currentIndex, currentIndex > 0 else { return }
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let newIndex = currentIndex - 1
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self.currentIndex = newIndex
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updateBarItems()
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resultsBarDelegate?.searchResultsBar(self, setCurrentIndex: newIndex, results: results)
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}
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func updateResults(results: [Int64]?) {
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currentIndex = {
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guard let results: [Int64] = results, !results.isEmpty else { return nil }
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if let currentIndex: Int = currentIndex {
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return max(0, min(currentIndex, results.count - 1))
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}
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return 0
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}()
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self.results = results
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updateBarItems()
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if let currentIndex = currentIndex, let results = results {
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resultsBarDelegate?.searchResultsBar(self, setCurrentIndex: currentIndex, results: results)
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}
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}
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func updateBarItems() {
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guard let results: [Int64] = results else {
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label.text = ""
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downButton.isEnabled = false
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upButton.isEnabled = false
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return
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}
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switch results.count {
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case 0:
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// Keyboard toolbar label when no messages match the search string
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label.text = "CONVERSATION_SEARCH_NO_RESULTS".localized()
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case 1:
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// Keyboard toolbar label when exactly 1 message matches the search string
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label.text = "CONVERSATION_SEARCH_ONE_RESULT".localized()
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default:
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// Keyboard toolbar label when more than 1 message matches the search string
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//
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// Embeds {{number/position of the 'currently viewed' result}} and
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// the {{total number of results}}
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let format = "CONVERSATION_SEARCH_RESULTS_FORMAT".localized()
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guard let currentIndex: Int = currentIndex else { return }
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label.text = String(format: format, currentIndex + 1, results.count)
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}
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if let currentIndex: Int = currentIndex {
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downButton.isEnabled = currentIndex > 0
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upButton.isEnabled = (currentIndex + 1 < results.count)
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}
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else {
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downButton.isEnabled = false
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upButton.isEnabled = false
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}
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}
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public func startLoading() {
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loadingIndicator.startAnimating()
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}
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public func stopLoading() {
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loadingIndicator.stopAnimating()
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}
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}
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// MARK: - ConversationSearchControllerDelegate
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public protocol ConversationSearchControllerDelegate: UISearchControllerDelegate {
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func conversationSearchController(_ conversationSearchController: ConversationSearchController, didUpdateSearchResults results: [Int64]?, searchText: String?)
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func conversationSearchController(_ conversationSearchController: ConversationSearchController, didSelectInteractionId: Int64)
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}
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