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//
// ShortcutsDataSource.swift
// MullvadVPN
//
// Created by Nikolay Davydov on 20.08.2022.
// Copyright © 2022 Mullvad VPN AB. All rights reserved.
//
import IntentsUI
import UIKit
final class ShortcutsDataSource: NSObject,
UITableViewDataSource,
UITableViewDelegate,
ShortcutsManagerDelegate
{
private enum CellReuseIdentifiers: String, CaseIterable {
case basicCell
var reusableViewClass: AnyClass {
switch self {
case .basicCell:
return SettingsCell.self
}
}
}
private enum HeaderFooterReuseIdentifier: String, CaseIterable {
case spacer
var reusableViewClass: AnyClass {
switch self {
case .spacer:
return EmptyTableViewHeaderFooterView.self
}
}
}
enum Section: String {
case shortcuts
}
struct Item: Hashable {
let title: String
let shortcut: INShortcut
let voiceShortcut: INVoiceShortcut?
var isAdded: Bool {
return voiceShortcut != nil
}
}
private var snapshot = DataSourceSnapshot<Section, Item>()
weak var delegate: ShortcutsDataSourceDelegate?
weak var tableView: UITableView? {
didSet {
tableView?.delegate = self
tableView?.dataSource = self
registerClasses()
}
}
override init() {
super.init()
updateDataSnapshot(voiceShortcuts: [])
ShortcutsManager.shared.delegate = self
ShortcutsManager.shared.updateVoiceShortcuts()
}
private func registerClasses() {
CellReuseIdentifiers.allCases.forEach { cellIdentifier in
tableView?.register(
cellIdentifier.reusableViewClass,
forCellReuseIdentifier: cellIdentifier.rawValue
)
}
HeaderFooterReuseIdentifier.allCases.forEach { reuseIdentifier in
tableView?.register(
reuseIdentifier.reusableViewClass,
forHeaderFooterViewReuseIdentifier: reuseIdentifier.rawValue
)
}
}
private func updateDataSnapshot(voiceShortcuts: [INVoiceShortcut]) {
var items = [Item]()
for data in ShortcutData.allCases {
guard let shortcut = data.shortcut else { continue }
let voiceShortcut = voiceShortcuts.first(where: { voiceShortcut in
isVoiceShortcut(voiceShortcut, invokes: shortcut)
})
let item = Item(
title: data.title,
shortcut: shortcut,
voiceShortcut: voiceShortcut
)
items.append(item)
}
var newSnapshot = DataSourceSnapshot<Section, Item>()
newSnapshot.appendSections([.shortcuts])
newSnapshot.appendItems(items, in: .shortcuts)
snapshot = newSnapshot
}
/// Returns whether the voice shortcut performs the same action as the specified shortcut.
private func isVoiceShortcut(
_ voiceShortcut: INVoiceShortcut,
invokes shortcut: INShortcut
) -> Bool {
if let a = voiceShortcut.shortcut.intent, let b = shortcut.intent {
return type(of: a) == type(of: b)
}
return false
}
// MARK: - UITableViewDataSource
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let sectionIdentifier = snapshot.section(at: section)!
return snapshot.numberOfItems(in: sectionIdentifier) ?? 0
}
func numberOfSections(in tableView: UITableView) -> Int {
return snapshot.numberOfSections()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let item = snapshot.itemForIndexPath(indexPath)!
let cell = tableView.dequeueReusableCell(
withIdentifier: CellReuseIdentifiers.basicCell.rawValue,
for: indexPath
)
if let cell = cell as? SettingsCell {
cell.titleLabel.text = item.title
cell.disclosureType = item.isAdded ? .tick : .none
}
return cell
}
// MARK: - UITableViewDelegate
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
guard let item = snapshot.itemForIndexPath(indexPath) else { return }
delegate?.shortcutsDataSource(self, didSelectItem: item)
tableView.deselectRow(at: indexPath, animated: true)
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
return tableView.dequeueReusableHeaderFooterView(
withIdentifier: HeaderFooterReuseIdentifier.spacer.rawValue
)
}
func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
return nil
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return UIMetrics.sectionSpacing
}
func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 0
}
// MARK: - ShortcutsManagerDelegate
func shortcutsManager(
_ shortcutsManager: ShortcutsManager,
didReceiveVoiceShortcuts voiceShortcuts: [INVoiceShortcut]
) {
updateDataSnapshot(voiceShortcuts: voiceShortcuts)
tableView?.reloadData()
}
}
private extension ShortcutsDataSource {
enum ShortcutData: CaseIterable {
case start
case reconnect
case stop
var title: String {
switch self {
case .start:
return NSLocalizedString(
"SHORTCUTS_NAME_START_VPN",
tableName: "Shortcuts",
value: "Start VPN",
comment: ""
)
case .reconnect:
return NSLocalizedString(
"SHORTCUTS_NAME_RECONNECT_VPN",
tableName: "Shortcuts",
value: "Reconnect VPN",
comment: ""
)
case .stop:
return NSLocalizedString(
"SHORTCUTS_NAME_STOP_VPN",
tableName: "Shortcuts",
value: "Stop VPN",
comment: ""
)
}
}
var shortcut: INShortcut? {
let intent: INIntent
switch self {
case .start:
intent = StartVPNIntent()
case .reconnect:
intent = ReconnectVPNIntent()
case .stop:
intent = StopVPNIntent()
}
intent.suggestedInvocationPhrase = title
guard let shortcut = INShortcut(intent: intent) else {
assertionFailure("The shortcut has an invalid intent.")
return nil
}
return shortcut
}
}
}
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