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- import UIKit
- import DcCore
- class ChatListController: UITableViewController {
- let viewModel: ChatListViewModelProtocol
- let dcContext: DcContext
- private let chatCellReuseIdentifier = "chat_cell"
- private let deadDropCellReuseIdentifier = "deaddrop_cell"
- private let contactCellReuseIdentifier = "contact_cell"
- private var msgChangedObserver: Any?
- private var incomingMsgObserver: Any?
- private var viewChatObserver: Any?
- private lazy var searchController: UISearchController = {
- let searchController = UISearchController(searchResultsController: nil)
- searchController.searchResultsUpdater = viewModel
- searchController.obscuresBackgroundDuringPresentation = false
- searchController.searchBar.placeholder = String.localized("search")
- searchController.searchBar.delegate = self
- return searchController
- }()
- private lazy var newButton: UIBarButtonItem = {
- let button = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.compose, target: self, action: #selector(didPressNewChat))
- button.tintColor = DcColors.primary
- return button
- }()
- private lazy var cancelButton: UIBarButtonItem = {
- let button = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelButtonPressed))
- return button
- }()
- private lazy var emptySearchStateLabel: EmptyStateLabel = {
- let label = EmptyStateLabel()
- label.isHidden = false
- return label
- }()
- func getArchiveCell(title: String) -> UITableViewCell {
- let cell = UITableViewCell()
- cell.textLabel?.textColor = .systemBlue
- cell.textLabel?.text = title
- cell.textLabel?.textAlignment = .center
- return cell
- }
- init(dcContext: DcContext, viewModel: ChatListViewModelProtocol) {
- self.viewModel = viewModel
- self.dcContext = dcContext
- if viewModel.isArchive {
- super.init(nibName: nil, bundle: nil)
- } else {
- super.init(style: .grouped)
- }
- viewModel.onChatListUpdate = handleChatListUpdate // register listener
- }
- required init?(coder _: NSCoder) {
- fatalError("init(coder:) has not been implemented")
- }
- // MARK: - lifecycle
- override func viewDidLoad() {
- super.viewDidLoad()
- navigationItem.rightBarButtonItem = newButton
- if !viewModel.isArchive {
- navigationItem.searchController = searchController
- }
- configureTableView()
- setupSubviews()
- }
- override func viewWillAppear(_ animated: Bool) {
- super.viewWillAppear(animated)
- // add welcome message
- dcContext.updateDeviceChats()
- // update messages - for new messages, do not reuse or modify strings but create new ones.
- // it is not needed to keep all past update messages, however, when deleted, also the strings should be deleted.
- let msg = DcMsg(viewType: DC_MSG_TEXT)
- msg.text = "new Delta Chat 1.10 features at a glance:\n"
- + "\n"
- + "⚡ faster\n"
- + "💕 share to Delta Chat\n"
- + "🤫 mute chats\n"
- + "🖼️ reworked gallery\n"
- + "\n"
- + "more details at https://delta.chat/en/2020-06-24-releases"
- dcContext.addDeviceMessage(label: "update_1_10k_ios", msg: msg)
- // create view
- updateTitle()
- viewModel.refreshData()
- if RelayHelper.sharedInstance.isForwarding() {
- quitSearch(animated: false)
- tableView.scrollToTop()
- }
- let nc = NotificationCenter.default
- msgChangedObserver = nc.addObserver(
- forName: dcNotificationChanged,
- object: nil,
- queue: nil) { [weak self] _ in
- self?.viewModel.refreshData()
- }
- incomingMsgObserver = nc.addObserver(
- forName: dcNotificationIncoming,
- object: nil,
- queue: nil) { [weak self] _ in
- self?.viewModel.refreshData()
- }
- viewChatObserver = nc.addObserver(
- forName: dcNotificationViewChat,
- object: nil,
- queue: nil) { [weak self] notification in
- if let chatId = notification.userInfo?["chat_id"] as? Int {
- self?.showChat(chatId: chatId)
- }
- }
- }
- override func viewDidDisappear(_ animated: Bool) {
- super.viewDidDisappear(animated)
- let nc = NotificationCenter.default
- if let msgChangedObserver = self.msgChangedObserver {
- nc.removeObserver(msgChangedObserver)
- }
- if let incomingMsgObserver = self.incomingMsgObserver {
- nc.removeObserver(incomingMsgObserver)
- }
- if let viewChatObserver = self.viewChatObserver {
- nc.removeObserver(viewChatObserver)
- }
- }
- // MARK: - setup
- private func setupSubviews() {
- view.addSubview(emptySearchStateLabel)
- emptySearchStateLabel.translatesAutoresizingMaskIntoConstraints = false
- emptySearchStateLabel.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor).isActive = true
- emptySearchStateLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 40).isActive = true
- emptySearchStateLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -40).isActive = true
- emptySearchStateLabel.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor).isActive = true
- }
- // MARK: - configuration
- private func configureTableView() {
- tableView.register(ContactCell.self, forCellReuseIdentifier: chatCellReuseIdentifier)
- tableView.register(ContactCell.self, forCellReuseIdentifier: deadDropCellReuseIdentifier)
- tableView.register(ContactCell.self, forCellReuseIdentifier: contactCellReuseIdentifier)
- tableView.rowHeight = 80
- }
- // MARK: - actions
- @objc func didPressNewChat() {
- showNewChatController()
- }
- @objc func cancelButtonPressed() {
- // cancel forwarding
- RelayHelper.sharedInstance.cancel()
- viewModel.refreshData()
- updateTitle()
- }
- private func quitSearch(animated: Bool) {
- searchController.searchBar.text = nil
- self.viewModel.endSearch()
- searchController.dismiss(animated: animated) {
- self.tableView.scrollToTop()
- }
- }
- // MARK: - UITableViewDelegate + UITableViewDatasource
- override func numberOfSections(in tableView: UITableView) -> Int {
- return viewModel.numberOfSections
- }
- override func tableView(_: UITableView, numberOfRowsInSection section: Int) -> Int {
- return viewModel.numberOfRowsIn(section: section)
- }
- override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
- let cellData = viewModel.cellDataFor(section: indexPath.section, row: indexPath.row)
- switch cellData.type {
- case .deaddrop:
- guard let deaddropCell = tableView.dequeueReusableCell(withIdentifier: deadDropCellReuseIdentifier, for: indexPath) as? ContactCell else {
- break
- }
- deaddropCell.updateCell(cellViewModel: cellData)
- return deaddropCell
- case .chat(let chatData):
- let chatId = chatData.chatId
- if chatId == DC_CHAT_ID_ARCHIVED_LINK {
- return getArchiveCell(title: dcContext.getChat(chatId: chatId).name)
- } else if let chatCell = tableView.dequeueReusableCell(withIdentifier: chatCellReuseIdentifier, for: indexPath) as? ContactCell {
- // default chatCell
- chatCell.updateCell(cellViewModel: cellData)
- return chatCell
- }
- case .contact:
- safe_assert(viewModel.searchActive)
- if let contactCell = tableView.dequeueReusableCell(withIdentifier: contactCellReuseIdentifier, for: indexPath) as? ContactCell {
- contactCell.updateCell(cellViewModel: cellData)
- return contactCell
- }
- }
- safe_fatalError("Could not find/dequeue or recycle UITableViewCell.")
- return UITableViewCell()
- }
- override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
- return viewModel.titleForHeaderIn(section: section)
- }
- override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
- let cellData = viewModel.cellDataFor(section: indexPath.section, row: indexPath.row)
- switch cellData.type {
- case .deaddrop(let deaddropData):
- safe_assert(deaddropData.chatId == DC_CHAT_ID_DEADDROP)
- showDeaddropRequestAlert(msgId: deaddropData.msgId)
- case .chat(let chatData):
- let chatId = chatData.chatId
- if chatId == DC_CHAT_ID_ARCHIVED_LINK {
- showArchive()
- } else {
- showChat(chatId: chatId)
- }
- case .contact(let contactData):
- let contactId = contactData.contactId
- if let chatId = contactData.chatId {
- showChat(chatId: chatId)
- } else {
- self.askToChatWith(contactId: contactId)
- }
- }
- tableView.deselectRow(at: indexPath, animated: false)
- }
- override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
- if viewModel.searchActive {
- // no swipe actions during search
- return []
- }
- guard let chatId = viewModel.chatIdFor(section: indexPath.section, row: indexPath.row) else {
- return []
- }
- if chatId==DC_CHAT_ID_ARCHIVED_LINK || chatId==DC_CHAT_ID_DEADDROP {
- return []
- // returning nil may result in a default delete action,
- // see https://forums.developer.apple.com/thread/115030
- }
- let archiveActionTitle: String = String.localized(viewModel.isArchive ? "unarchive" : "archive")
- let archiveAction = UITableViewRowAction(style: .destructive, title: archiveActionTitle) { [weak self] _, _ in
- self?.viewModel.archiveChatToggle(chatId: chatId)
- }
- archiveAction.backgroundColor = UIColor.lightGray
- let chat = dcContext.getChat(chatId: chatId)
- let pinned = chat.visibility==DC_CHAT_VISIBILITY_PINNED
- let pinAction = UITableViewRowAction(style: .destructive, title: String.localized(pinned ? "unpin" : "pin")) { [weak self] _, _ in
- self?.viewModel.pinChatToggle(chatId: chat.id)
- }
- pinAction.backgroundColor = UIColor.systemGreen
- let deleteAction = UITableViewRowAction(style: .normal, title: String.localized("delete")) { [weak self] _, _ in
- self?.showDeleteChatConfirmationAlert(chatId: chatId)
- }
- deleteAction.backgroundColor = UIColor.systemRed
- return [archiveAction, pinAction, deleteAction]
- }
- // MARK: updates
- private func updateTitle() {
- if RelayHelper.sharedInstance.isForwarding() {
- title = String.localized("forward_to")
- if !viewModel.isArchive {
- navigationItem.setLeftBarButton(cancelButton, animated: true)
- }
- } else {
- title = viewModel.isArchive ? String.localized("chat_archived_chats_title") :
- String.localized("pref_chats")
- navigationItem.setLeftBarButton(nil, animated: true)
- }
- }
- func handleChatListUpdate() {
- tableView.reloadData()
- if let emptySearchText = viewModel.emptySearchText {
- let text = String.localizedStringWithFormat(
- String.localized("search_no_result_for_x"),
- emptySearchText
- )
- emptySearchStateLabel.text = text
- emptySearchStateLabel.isHidden = false
- } else {
- emptySearchStateLabel.text = nil
- emptySearchStateLabel.isHidden = true
- }
- }
- func getArchiveCell(_ tableView: UITableView, title: String) -> UITableViewCell {
- let archiveCell: UITableViewCell
- if let cell = tableView.dequeueReusableCell(withIdentifier: "ArchiveCell") {
- archiveCell = cell
- } else {
- archiveCell = UITableViewCell(style: .default, reuseIdentifier: "ArchiveCell")
- }
- archiveCell.textLabel?.textAlignment = .center
- archiveCell.textLabel?.text = title
- archiveCell.textLabel?.textColor = UIColor.systemBlue
- return archiveCell
- }
- // MARK: - alerts
- private func showDeleteChatConfirmationAlert(chatId: Int) {
- let alert = UIAlertController(
- title: nil,
- message: String.localized("ask_delete_chat_desktop"),
- preferredStyle: .safeActionSheet
- )
- alert.addAction(UIAlertAction(title: String.localized("menu_delete_chat"), style: .destructive, handler: { _ in
- self.deleteChat(chatId: chatId, animated: true)
- }))
- alert.addAction(UIAlertAction(title: String.localized("cancel"), style: .cancel, handler: nil))
- self.present(alert, animated: true, completion: nil)
- }
- private func showDeaddropRequestAlert(msgId: Int) {
- let dcMsg = DcMsg(id: msgId)
- let dcContact = DcContact(id: dcMsg.fromContactId)
- let title = String.localizedStringWithFormat(String.localized("ask_start_chat_with"), dcContact.nameNAddr)
- let alert = UIAlertController(title: title, message: nil, preferredStyle: .safeActionSheet)
- alert.addAction(UIAlertAction(title: String.localized("start_chat"), style: .default, handler: { _ in
- let chat = self.dcContext.createChatByMessageId(msgId)
- self.showChat(chatId: chat.id)
- }))
- alert.addAction(UIAlertAction(title: String.localized("not_now"), style: .default, handler: { _ in
- dcContact.marknoticed()
- }))
- alert.addAction(UIAlertAction(title: String.localized("menu_block_contact"), style: .destructive, handler: { _ in
- dcContact.block()
- }))
- alert.addAction(UIAlertAction(title: String.localized("cancel"), style: .cancel))
- present(alert, animated: true, completion: nil)
- }
- private func askToChatWith(contactId: Int) {
- let dcContact = DcContact(id: contactId)
- let alert = UIAlertController(
- title: String.localizedStringWithFormat(String.localized("ask_start_chat_with"), dcContact.nameNAddr),
- message: nil,
- preferredStyle: .safeActionSheet)
- alert.addAction(UIAlertAction(
- title: String.localized("start_chat"),
- style: .default,
- handler: { _ in
- self.showNewChat(contactId: contactId)
- }))
- alert.addAction(UIAlertAction(
- title: String.localized("cancel"),
- style: .cancel,
- handler: { _ in
- }))
- self.present(alert, animated: true, completion: nil)
- }
- private func deleteChat(chatId: Int, animated: Bool) {
- if !animated {
- _ = viewModel.deleteChat(chatId: chatId)
- viewModel.refreshData()
- return
- }
- let row = viewModel.deleteChat(chatId: chatId)
- tableView.deleteRows(at: [IndexPath(row: row, section: 0)], with: .fade)
- }
- // MARK: - coordinator
- private func showNewChatController() {
- let newChatVC = NewChatViewController(dcContext: dcContext)
- navigationController?.pushViewController(newChatVC, animated: true)
- }
- func showChat(chatId: Int, animated: Bool = true) {
- let chatVC = ChatViewController(dcContext: dcContext, chatId: chatId)
- navigationController?.pushViewController(chatVC, animated: animated)
- }
- private func showArchive() {
- let viewModel = ChatListViewModel(dcContext: dcContext, isArchive: true)
- let controller = ChatListController(dcContext: dcContext, viewModel: viewModel)
- navigationController?.pushViewController(controller, animated: true)
- }
- private func showNewChat(contactId: Int) {
- let chatId = dcContext.createChatByContactId(contactId: contactId)
- showChat(chatId: Int(chatId))
- }
- }
- // MARK: - uisearchbardelegate
- extension ChatListController: UISearchBarDelegate {
- func searchBarShouldBeginEditing(_ searchBar: UISearchBar) -> Bool {
- viewModel.beginSearch()
- return true
- }
- func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
- // searchBar will be set to "" by system
- viewModel.endSearch()
- DispatchQueue.main.asyncAfter(deadline: .now() + 0.01) {
- self.tableView.scrollToTop()
- }
- }
- func searchBar(_ searchBar: UISearchBar, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
- tableView.scrollToTop()
- return true
- }
- }
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