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+import UIKit
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+import DcCore
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+
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+class ChatViewController2: UIViewController {
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+
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+ var dcContext: DcContext
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+ let chatId: Int
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+ var messageIds: [Int] = []
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+
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+ var heightConstraint: NSLayoutConstraint?
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+ var bottomInset: CGFloat {
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+ get {
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+ logger.debug("bottomInset - get: \(heightConstraint?.constant ?? 0)")
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+ return heightConstraint?.constant ?? 0
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+ }
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+ set {
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+ logger.debug("bottomInset - set: \(newValue)")
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+ heightConstraint?.constant = newValue
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+ }
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+ }
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+
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+
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+ lazy var isGroupChat: Bool = {
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+ return dcContext.getChat(chatId: chatId).isGroup
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+ }()
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+
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+ lazy var draft: DraftModel = {
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+ let draft = DraftModel(dcContext: dcContext, chatId: chatId)
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+ return draft
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+ }()
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+
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+ lazy var tableView: UITableView = {
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+ let tableView: UITableView = UITableView(frame: .zero)
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+ tableView.translatesAutoresizingMaskIntoConstraints = false
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+ tableView.delegate = self
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+ tableView.dataSource = self
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+ return tableView
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+ }()
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+
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+ lazy var textView: ChatInputTextView = {
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+ let textView = ChatInputTextView()
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+ textView.translatesAutoresizingMaskIntoConstraints = false
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+ textView.font = UIFont.preferredFont(forTextStyle: .body)
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+ textView.backgroundColor = DcColors.inputFieldColor
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+ textView.isEditable = true
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+ return textView
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+ }()
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+
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+ lazy var dummyView: UIView = {
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+ let view = UIView(frame: .zero)
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+ view.translatesAutoresizingMaskIntoConstraints = false
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+ view.backgroundColor = .yellow
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+ view.addSubview(textView)
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+ return view
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+ }()
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+
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+ private lazy var keyboardManager: KeyboardManager? = {
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+ let manager = KeyboardManager()
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+ return manager
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+ }()
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+
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+ public lazy var backgroundContainer: UIImageView = {
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+ let view = UIImageView()
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+ view.contentMode = .scaleAspectFill
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+ view.backgroundColor = .blue
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+ if let backgroundImageName = UserDefaults.standard.string(forKey: Constants.Keys.backgroundImageName) {
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+ view.sd_setImage(with: Utils.getBackgroundImageURL(name: backgroundImageName),
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+ placeholderImage: nil,
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+ options: [.retryFailed]) { [weak self] (_, error, _, _) in
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+ if let error = error {
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+ logger.error("Error loading background image: \(error.localizedDescription)" )
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+ DispatchQueue.main.async { [weak self] in
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+ self?.setDefaultBackgroundImage(view: view)
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+ }
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+ }
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+ }
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+ } else {
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+ setDefaultBackgroundImage(view: view)
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+ }
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+ return view
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+ }()
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+
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+ init(dcContext: DcContext, chatId: Int, highlightedMsg: Int? = nil) {
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+ self.dcContext = dcContext
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+ self.chatId = chatId
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+ super.init(nibName: nil, bundle: nil)
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+ hidesBottomBarWhenPushed = true
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+ }
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+
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+ required init?(coder aDecoder: NSCoder) {
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+ fatalError("init(coder:) has not been implemented")
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+ }
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+
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+ override func viewDidLoad() {
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+ super.viewDidLoad()
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+ setupSubviews()
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+ tableView.backgroundView = backgroundContainer
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+ tableView.register(TextMessageCell.self, forCellReuseIdentifier: "text")
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+ tableView.rowHeight = UITableView.automaticDimension
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+ tableView.separatorStyle = .none
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+ tableView.keyboardDismissMode = .interactive
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+ navigationController?.setNavigationBarHidden(false, animated: false)
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+
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+ if #available(iOS 13.0, *) {
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+ navigationController?.navigationBar.scrollEdgeAppearance = navigationController?.navigationBar.standardAppearance
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+ }
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+
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+ navigationItem.backButtonTitle = String.localized("chat")
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+ definesPresentationContext = true
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+
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+ if !dcContext.isConfigured() {
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+ // TODO: display message about nothing being configured
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+ return
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+ }
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+
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+ // Binding to the tableView will enable interactive dismissal
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+ keyboardManager?.bind(to: tableView)
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+ keyboardManager?.on(event: .willChangeFrame) { [weak self] event in
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+ guard let self = self else { return }
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+ if self.keyboardManager?.isKeyboardHidden ?? true {
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+ return
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+ }
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+ logger.debug("willChangeFrame \(event)")
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+ let keyboardScreenEndFrame = event.endFrame
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+ self.bottomInset = self.getInputTextHeight() + self.dummyView.convert(keyboardScreenEndFrame, from: self.view.window).height
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+ }.on(event: .willHide) { [weak self] event in
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+ guard let self = self else { return }
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+ logger.debug("willHide \(event)")
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+ self.bottomInset = self.getInputTextHeight()
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+ }.on(event: .didHide) { [weak self] event in
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+ guard let self = self else { return }
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+ logger.debug("didHide \(event)")
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+ self.bottomInset = self.getInputTextHeight()
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+ }.on(event: .willShow) { [weak self] event in
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+ guard let self = self else { return }
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+ logger.debug("willShow \(event)")
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+ self.bottomInset = self.getInputTextHeight() + self.dummyView.convert(event.endFrame, from: self.view.window).height
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+ UIView.animate(withDuration: event.timeInterval, delay: 0, options: event.animationOptions, animations: {
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+ self.dummyView.layoutIfNeeded()
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+ })
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+ }
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+
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+ loadMessages()
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+ }
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+
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+ private func getInputTextHeight() -> CGFloat {
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+ return 70
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+ }
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+
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+ private func loadMessages() {
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+ // update message ids
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+ var msgIds = dcContext.getChatMsgs(chatId: chatId)
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+ let freshMsgsCount = self.dcContext.getUnreadMessages(chatId: self.chatId)
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+ if freshMsgsCount > 0 && msgIds.count >= freshMsgsCount {
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+ let index = msgIds.count - freshMsgsCount
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+ msgIds.insert(Int(DC_MSG_ID_MARKER1), at: index)
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+ }
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+ self.messageIds = msgIds
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+ self.reloadData()
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+ }
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+
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+ private func reloadData() {
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+ let selectredRows = tableView.indexPathsForSelectedRows
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+ tableView.reloadData()
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+ // There's an iOS bug, filling up the console output but which can be ignored: https://developer.apple.com/forums/thread/668295
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+ // [Assert] Attempted to call -cellForRowAtIndexPath: on the table view while it was in the process of updating its visible cells, which is not allowed.
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+ selectredRows?.forEach({ (selectedRow) in
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+ tableView.selectRow(at: selectedRow, animated: false, scrollPosition: .none)
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+ })
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+ }
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+
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+ func setupSubviews() {
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+ view.addSubview(tableView)
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+ view.addSubview(dummyView)
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+ view.addConstraints([
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+ tableView.constraintAlignTopToAnchor(view.safeAreaLayoutGuide.topAnchor),
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+ tableView.constraintAlignLeadingToAnchor(view.safeAreaLayoutGuide.leadingAnchor),
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+ tableView.constraintAlignTrailingToAnchor(view.safeAreaLayoutGuide.trailingAnchor),
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+ tableView.constraintAlignBottomToAnchor(dummyView.topAnchor),
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+ dummyView.constraintAlignLeadingToAnchor(view.safeAreaLayoutGuide.leadingAnchor),
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+ dummyView.constraintAlignTrailingToAnchor(view.safeAreaLayoutGuide.trailingAnchor),
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+ dummyView.constraintAlignBottomToAnchor(view.safeAreaLayoutGuide.bottomAnchor)
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+ ,
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+ textView.constraintAlignTopTo(dummyView),
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+ textView.constraintAlignLeadingTo(dummyView),
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+ textView.constraintAlignTrailingTo(dummyView),
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+ textView.constraintAlignBottomTo(dummyView),
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+ ])
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+ heightConstraint = dummyView.constraintMinHeightTo(bottomInset)
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+ bottomInset = getInputTextHeight()
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+ heightConstraint?.isActive = true
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+
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+ navigationItem.title = "new Chat UI"
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+
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+ }
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+
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+ private func configureUIForWriting() {
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+ tableView.allowsMultipleSelectionDuringEditing = true
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+ tableView.dragInteractionEnabled = true
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+ }
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+
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+ private func setDefaultBackgroundImage(view: UIImageView) {
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+ if #available(iOS 12.0, *) {
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+ view.image = UIImage(named: traitCollection.userInterfaceStyle == .light ? "background_light" : "background_dark")
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+ } else {
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+ view.image = UIImage(named: "background_light")
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+ }
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+ }
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+}
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+
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+extension ChatViewController2: UITableViewDelegate {
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+
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+}
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+
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+extension ChatViewController2: UITableViewDataSource {
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+ func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
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+ messageIds.count
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+ }
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+
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+ func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
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+ return UITableViewCell()
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+ }
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+}
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cyberta