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377 lines
14 KiB
Swift
377 lines
14 KiB
Swift
//
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// LanguageViewController.swift
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// KeymanEngine
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//
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// Created by Gabriel Wong on 2017-09-15.
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// Copyright © 2017 SIL International. All rights reserved.
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//
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import QuartzCore
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import UIKit
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private let activityViewTag = -2
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private let toolbarButtonTag = 100
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private let toolbarLabelTag = 101
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private let toolbarActivityIndicatorTag = 102
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class LanguageViewController: UITableViewController, UIAlertViewDelegate {
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private var userKeyboards: [String: InstallableKeyboard] = [:]
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private var userLexicalModels: [String: InstallableLexicalModel] = [:]
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private var sectionIndexTitles: [String] = []
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private var indices: [Int] = []
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private var selectedSection = 0
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private var isUpdate = false
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private var languages: [Language] = []
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private let keyboardRepository: KeyboardRepository?
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private let lexicalModelRepository: LexicalModelRepository?
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private var keyboardDownloadStartedObserver: NotificationObserver?
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private var keyboardDownloadFailedObserver: NotificationObserver?
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init(_ keyboardRepository: KeyboardRepository) {
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self.keyboardRepository = keyboardRepository
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self.lexicalModelRepository = nil
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super.init(nibName: nil, bundle: nil)
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keyboardRepository.delegate = self
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}
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init(_ lexicalModelRepository: LexicalModelRepository) {
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self.lexicalModelRepository = lexicalModelRepository
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self.keyboardRepository = nil
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super.init(nibName: nil, bundle: nil)
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lexicalModelRepository.delegate = self
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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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override func loadView() {
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super.loadView()
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if let languageDict = keyboardRepository?.languages {
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languages = languageList(languageDict)
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} else {
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keyboardRepository?.fetch()
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}
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loadUserKeyboards()
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loadUserLexicalModels()
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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title = "Add New Keyboard"
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selectedSection = NSNotFound
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keyboardDownloadStartedObserver = NotificationCenter.default.addObserver(
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forName: Notifications.keyboardDownloadStarted,
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observer: self,
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function: LanguageViewController.keyboardDownloadStarted)
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keyboardDownloadFailedObserver = NotificationCenter.default.addObserver(
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forName: Notifications.keyboardDownloadFailed,
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observer: self,
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function: LanguageViewController.keyboardDownloadFailed)
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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navigationController?.setToolbarHidden(true, animated: true)
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// if no rows to show yet, show a loading indicator
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if numberOfSections(in: tableView) == 0 {
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showActivityView()
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} else {
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log.info("didAppear: LanguageViewController")
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}
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}
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override func numberOfSections(in tableView: UITableView) -> Int {
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return languages.count
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}
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override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
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return 1
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}
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override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
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let cellIdentifierType1 = "CellType1"
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let cellIdentifierType2 = "CellType2"
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let keyboards = languages[indexPath.section].keyboards!
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let cellIdentifier = (keyboards.count < 2) ? cellIdentifierType1 : cellIdentifierType2
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let cell: UITableViewCell
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if let reusedCell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier) {
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cell = reusedCell
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} else {
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if keyboards.count < 2 {
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cell = KeyboardNameTableViewCell(style: .subtitle, reuseIdentifier: cellIdentifier)
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let selectionColor = UIView()
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selectionColor.backgroundColor = UIColor(red: 204.0 / 255.0, green: 136.0 / 255.0,
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blue: 34.0 / 255.0, alpha: 1.0)
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cell.selectedBackgroundView = selectionColor
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} else {
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cell = UITableViewCell(style: .default, reuseIdentifier: cellIdentifier)
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cell.accessoryType = .disclosureIndicator
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let selectionColor = UIView()
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selectionColor.backgroundColor = UIColor(red: 204.0 / 255.0, green: 136.0 / 255.0,
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blue: 34.0 / 255.0, alpha: 1.0)
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cell.selectedBackgroundView = selectionColor
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}
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}
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cell.detailTextLabel?.text = keyboards.count < 2 ? (keyboards.first?.name ?? "") : ""
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return cell
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}
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// Create sections by first letter
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override func sectionIndexTitles(for tableView: UITableView) -> [String] {
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if !sectionIndexTitles.isEmpty {
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return sectionIndexTitles
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}
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sectionIndexTitles = []
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indices = []
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for (index, language) in languages.enumerated() {
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let firstLetter = String(language.name.prefix(1)).uppercased()
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if !sectionIndexTitles.contains(firstLetter) {
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sectionIndexTitles.append(firstLetter)
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indices.append(index)
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}
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}
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return sectionIndexTitles
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}
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override func tableView(_ tableView: UITableView, sectionForSectionIndexTitle title: String, at index: Int) -> Int {
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return indices[index]
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}
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override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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guard let language = languages[safe: indexPath.section] else {
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return
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}
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cell.textLabel?.text = language.name
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if cell.accessoryType == .disclosureIndicator {
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return
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}
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guard let cell = cell as? KeyboardNameTableViewCell else {
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return
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}
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let languageID = language.id
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let keyboardID = language.keyboards![0].id
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if isAdded(languageID: languageID, keyboardID: keyboardID) {
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cell.accessoryType = .checkmark
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cell.isUserInteractionEnabled = false
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cell.textLabel?.isEnabled = false
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cell.detailTextLabel?.isEnabled = false
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} else {
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cell.accessoryType = .none
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cell.isUserInteractionEnabled = true
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cell.textLabel?.isEnabled = true
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cell.detailTextLabel?.isEnabled = true
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}
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let kbState = Manager.shared.stateForKeyboard(withID: keyboardID)
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cell.setKeyboardState(kbState, selected: false, defaultAccessoryType: cell.accessoryType)
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}
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override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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selectedSection = indexPath.section
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tableView.cellForRow(at: indexPath)?.isSelected = false
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if tableView.cellForRow(at: indexPath)?.accessoryType == .disclosureIndicator {
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let title = tableView.cellForRow(at: indexPath)?.textLabel?.text ?? ""
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showLanguageDetailView(title: title, languageIndex: indexPath.section)
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return
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}
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let language = languages[indexPath.section]
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let keyboardIndex = 0;
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let keyboard = language.keyboards![keyboardIndex]
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let state = Manager.shared.stateForKeyboard(withID: keyboard.id)
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if state != .downloading {
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isUpdate = state != .needsDownload
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let alertController = UIAlertController(title: "\(language.name): \(keyboard.name)",
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message: "Would you like to download this keyboard?",
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preferredStyle: UIAlertControllerStyle.alert)
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alertController.addAction(UIAlertAction(title: "Cancel",
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style: UIAlertActionStyle.cancel,
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handler: nil))
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alertController.addAction(UIAlertAction(title: "Download",
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style: UIAlertActionStyle.default,
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handler: {_ in self.downloadHandler(keyboardIndex)} ))
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self.present(alertController, animated: true, completion: nil)
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}
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}
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override func tableView(_ tableView: UITableView, accessoryButtonTappedForRowWith indexPath: IndexPath) {
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let title = tableView.cellForRow(at: indexPath)?.textLabel?.text ?? ""
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showLanguageDetailView(title: title, languageIndex: indexPath.section)
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}
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private func showLanguageDetailView(title: String, languageIndex: Int) {
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let langDetailView = LanguageDetailViewController(language: languages[languageIndex])
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langDetailView.title = title
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navigationController?.pushViewController(langDetailView, animated: true)
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}
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func errorAcknowledgmentHandler(withAction action: UIAlertAction) {
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if !languages.isEmpty {
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navigationController?.popToRootViewController(animated: true)
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}
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}
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func downloadHandler(_ keyboardIndex: Int) {
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let language = languages[selectedSection]
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let keyboard = language.keyboards![keyboardIndex]
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Manager.shared.downloadKeyboard(withID: keyboard.id, languageID: language.id, isUpdate: isUpdate)
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}
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private func keyboardDownloadStarted() {
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view.isUserInteractionEnabled = false
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navigationItem.setHidesBackButton(true, animated: true)
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guard let toolbar = navigationController?.toolbar else {
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return
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}
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let labelFrame = CGRect(origin: toolbar.frame.origin,
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size: CGSize(width: toolbar.frame.width * 0.95,
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height: toolbar.frame.height * 0.7))
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let label = UILabel(frame: labelFrame)
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label.backgroundColor = UIColor.clear
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label.textColor = UIColor.white
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label.textAlignment = .center
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label.center = CGPoint(x: toolbar.frame.width * 0.5, y: toolbar.frame.height * 0.5)
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label.text = "Downloading\u{2026}"
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label.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin, .flexibleTopMargin,
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.flexibleBottomMargin, .flexibleWidth, .flexibleHeight]
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label.tag = toolbarLabelTag
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let indicatorView = UIActivityIndicatorView(activityIndicatorStyle: .gray)
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indicatorView.center = CGPoint(x: toolbar.frame.width - indicatorView.frame.width,
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y: toolbar.frame.height * 0.5)
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indicatorView.autoresizingMask = [.flexibleLeftMargin, .flexibleTopMargin, .flexibleBottomMargin]
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indicatorView.tag = toolbarActivityIndicatorTag
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indicatorView.startAnimating()
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toolbar.viewWithTag(toolbarButtonTag)?.removeFromSuperview()
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toolbar.viewWithTag(toolbarLabelTag)?.removeFromSuperview()
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toolbar.viewWithTag(toolbarActivityIndicatorTag)?.removeFromSuperview()
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toolbar.addSubview(label)
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toolbar.addSubview(indicatorView)
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navigationController?.setToolbarHidden(false, animated: true)
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}
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private func keyboardDownloadFailed() {
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view.isUserInteractionEnabled = true
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navigationItem.setHidesBackButton(false, animated: true)
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}
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func showActivityView() {
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view.isUserInteractionEnabled = false
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let indicatorView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
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let activityView = UIView(frame: indicatorView.bounds.insetBy(dx: -10.0, dy: -10.0))
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activityView.backgroundColor = UIColor(white: 0.5, alpha: 0.8)
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activityView.layer.cornerRadius = 6.0
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activityView.center = view.center
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activityView.tag = activityViewTag
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activityView.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin, .flexibleTopMargin,
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.flexibleBottomMargin]
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indicatorView.center = CGPoint(x: activityView.bounds.size.width * 0.5, y: activityView.bounds.size.height * 0.5)
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indicatorView.startAnimating()
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activityView.addSubview(indicatorView)
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view.addSubview(activityView)
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}
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func dismissActivityView() {
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let activityView = view.viewWithTag(activityViewTag)
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activityView?.removeFromSuperview()
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view.isUserInteractionEnabled = true
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}
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func loadUserKeyboards() {
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userKeyboards = [:]
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guard let userKbList = Storage.active.userDefaults.userKeyboards else {
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return
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}
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for kb in userKbList {
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let dictKey = "\(kb.languageID)_\(kb.id)"
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userKeyboards[dictKey] = kb
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}
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}
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func loadUserLexicalModels() {
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userLexicalModels = [:]
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guard let userLmList = Storage.active.userDefaults.userLexicalModels else {
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return
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}
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for lm in userLmList {
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let dictKey = "\(lm.languageID)_\(lm.id)"
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userLexicalModels[dictKey] = lm
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}
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}
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private func isAdded(languageID: String?, keyboardID: String?) -> Bool {
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guard let languageID = languageID, let keyboardID = keyboardID else {
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return false
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}
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return userKeyboards["\(languageID)_\(keyboardID)"] != nil
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}
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private func showConnectionErrorAlert() {
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dismissActivityView()
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let alertController = UIAlertController(title: "Connection Error",
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message: "Could not reach Keyman server. Please try again later.",
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preferredStyle: UIAlertControllerStyle.alert)
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alertController.addAction(UIAlertAction(title: "OK",
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style: UIAlertActionStyle.default,
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handler: errorAcknowledgmentHandler))
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self.present(alertController, animated: true, completion: nil)
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}
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}
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// MARK: - KeyboardRepositoryDelegate
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extension LanguageViewController: KeyboardRepositoryDelegate {
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func keyboardRepositoryDidFetch(_ repository: KeyboardRepository) {
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if let languageDict = repository.languages {
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languages = languageList(languageDict)
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}
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self.dismissActivityView()
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self.tableView.reloadData()
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if self.numberOfSections(in: self.tableView) == 0 {
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self.showConnectionErrorAlert()
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}
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}
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func keyboardRepository(_ repository: KeyboardRepository, didFailFetch error: Error) {
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dismissActivityView()
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showConnectionErrorAlert()
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}
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private func languageList(_ languageDict: [String: Language]) -> [Language] {
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return languageDict.values.sorted { a, b -> Bool in
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a.name.localizedCaseInsensitiveCompare(b.name) == .orderedAscending
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}
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}
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}
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// MARK: - LexicalModelRepositoryDelegate
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//may not need this, as we don't plan ever to fetch the whole lexical model repository (or even the list of all available)
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extension LanguageViewController: LexicalModelRepositoryDelegate {
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func lexicalModelRepositoryDidFetch(_ repository: LexicalModelRepository) {
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if let languageDict = repository.languages {
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languages = languageList(languageDict)
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}
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self.dismissActivityView()
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self.tableView.reloadData()
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if self.numberOfSections(in: self.tableView) == 0 {
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self.showConnectionErrorAlert()
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}
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}
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func lexicalModelRepository(_ repository: LexicalModelRepository, didFailFetch error: Error) {
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dismissActivityView()
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showConnectionErrorAlert()
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}
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}
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