NetNewsWire/iOS/AppDelegate.swift

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//
// AppDelegate.swift
// NetNewsWire
//
// Created by Maurice Parker on 4/8/19.
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import UIKit
import RSCore
import RSWeb
import Account
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import BackgroundTasks
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import os.log
var appDelegate: AppDelegate!
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, UnreadCountProvider {
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private var bgTaskDispatchQueue = DispatchQueue.init(label: "BGTaskScheduler")
private var waitBackgroundUpdateTask = UIBackgroundTaskIdentifier.invalid
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private var syncBackgroundUpdateTask = UIBackgroundTaskIdentifier.invalid
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var syncTimer: ArticleStatusSyncTimer?
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var shuttingDown = false {
didSet {
if shuttingDown {
syncTimer?.shuttingDown = shuttingDown
syncTimer?.invalidate()
}
}
}
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var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "Application")
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var userNotificationManager: UserNotificationManager!
var faviconDownloader: FaviconDownloader!
var imageDownloader: ImageDownloader!
var authorAvatarDownloader: AuthorAvatarDownloader!
var webFeedIconDownloader: WebFeedIconDownloader!
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var unreadCount = 0 {
didSet {
if unreadCount != oldValue {
postUnreadCountDidChangeNotification()
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UIApplication.shared.applicationIconBadgeNumber = unreadCount
}
}
}
var isSyncArticleStatusRunning = false
var isWaitingForSyncTasks = false
override init() {
super.init()
appDelegate = self
// Force lazy initialization of the web view provider so that it can warm up the queue of prepared web views
let _ = ArticleViewControllerWebViewProvider.shared
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AccountManager.shared = AccountManager()
NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidChange(_:)), name: .UnreadCountDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(accountRefreshDidFinish(_:)), name: .AccountRefreshDidFinish, object: nil)
}
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func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
AppDefaults.registerDefaults()
let isFirstRun = AppDefaults.isFirstRun
if isFirstRun {
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os_log("Is first run.", log: log, type: .info)
}
if isFirstRun && !AccountManager.shared.anyAccountHasAtLeastOneFeed() {
let localAccount = AccountManager.shared.defaultAccount
DefaultFeedsImporter.importDefaultFeeds(account: localAccount)
}
registerBackgroundTasks()
CacheCleaner.purgeIfNecessary()
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initializeDownloaders()
initializeHomeScreenQuickActions()
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DispatchQueue.main.async {
self.unreadCount = AccountManager.shared.unreadCount
}
UNUserNotificationCenter.current().requestAuthorization(options:[.badge, .sound, .alert]) { (granted, error) in
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if granted {
DispatchQueue.main.async {
UIApplication.shared.registerForRemoteNotifications()
}
}
}
UNUserNotificationCenter.current().delegate = self
userNotificationManager = UserNotificationManager()
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syncTimer = ArticleStatusSyncTimer()
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#if DEBUG
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syncTimer!.update()
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#endif
return true
}
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func applicationWillTerminate(_ application: UIApplication) {
shuttingDown = true
}
// MARK: Notifications
@objc func unreadCountDidChange(_ note: Notification) {
if note.object is AccountManager {
unreadCount = AccountManager.shared.unreadCount
}
}
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@objc func accountRefreshDidFinish(_ note: Notification) {
AppDefaults.lastRefresh = Date()
}
// MARK: - API
func prepareAccountsForBackground() {
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syncTimer?.invalidate()
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scheduleBackgroundFeedRefresh()
syncArticleStatus()
waitForSyncTasksToFinish()
}
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func prepareAccountsForForeground() {
if AccountManager.shared.isSuspended {
AccountManager.shared.resumeAll()
os_log("Application processing resumed.", log: self.log, type: .info)
}
if let lastRefresh = AppDefaults.lastRefresh {
if Date() > lastRefresh.addingTimeInterval(15 * 60) {
AccountManager.shared.refreshAll(errorHandler: ErrorHandler.log)
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} else {
AccountManager.shared.syncArticleStatusAll()
syncTimer?.update()
}
} else {
AccountManager.shared.refreshAll(errorHandler: ErrorHandler.log)
}
}
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func logMessage(_ message: String, type: LogItem.ItemType) {
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print("logMessage: \(message) - \(type)")
}
func logDebugMessage(_ message: String) {
logMessage(message, type: .debug)
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .badge, .sound])
}
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func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
defer { completionHandler() }
if let sceneDelegate = response.targetScene?.delegate as? SceneDelegate {
sceneDelegate.handle(response)
}
}
}
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// MARK: App Initialization
private extension AppDelegate {
private func initializeDownloaders() {
let tempDir = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first!
let faviconsFolderURL = tempDir.appendingPathComponent("Favicons")
let imagesFolderURL = tempDir.appendingPathComponent("Images")
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try! FileManager.default.createDirectory(at: faviconsFolderURL, withIntermediateDirectories: true, attributes: nil)
let faviconsFolder = faviconsFolderURL.absoluteString
let faviconsFolderPath = faviconsFolder.suffix(from: faviconsFolder.index(faviconsFolder.startIndex, offsetBy: 7))
faviconDownloader = FaviconDownloader(folder: String(faviconsFolderPath))
let imagesFolder = imagesFolderURL.absoluteString
let imagesFolderPath = imagesFolder.suffix(from: imagesFolder.index(imagesFolder.startIndex, offsetBy: 7))
try! FileManager.default.createDirectory(at: imagesFolderURL, withIntermediateDirectories: true, attributes: nil)
imageDownloader = ImageDownloader(folder: String(imagesFolderPath))
authorAvatarDownloader = AuthorAvatarDownloader(imageDownloader: imageDownloader)
let tempFolder = tempDir.absoluteString
let tempFolderPath = tempFolder.suffix(from: tempFolder.index(tempFolder.startIndex, offsetBy: 7))
webFeedIconDownloader = WebFeedIconDownloader(imageDownloader: imageDownloader, folder: String(tempFolderPath))
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}
private func initializeHomeScreenQuickActions() {
let unreadTitle = NSLocalizedString("First Unread", comment: "First Unread")
let unreadIcon = UIApplicationShortcutIcon(systemImageName: "chevron.down.circle")
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let unreadItem = UIApplicationShortcutItem(type: "com.ranchero.NetNewsWire.FirstUnread", localizedTitle: unreadTitle, localizedSubtitle: nil, icon: unreadIcon, userInfo: nil)
let searchTitle = NSLocalizedString("Search", comment: "Search")
let searchIcon = UIApplicationShortcutIcon(systemImageName: "magnifyingglass")
let searchItem = UIApplicationShortcutItem(type: "com.ranchero.NetNewsWire.ShowSearch", localizedTitle: searchTitle, localizedSubtitle: nil, icon: searchIcon, userInfo: nil)
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let addTitle = NSLocalizedString("Add Feed", comment: "Add Feed")
let addIcon = UIApplicationShortcutIcon(systemImageName: "plus")
let addItem = UIApplicationShortcutItem(type: "com.ranchero.NetNewsWire.ShowAdd", localizedTitle: addTitle, localizedSubtitle: nil, icon: addIcon, userInfo: nil)
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UIApplication.shared.shortcutItems = [addItem, searchItem, unreadItem]
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}
}
// MARK: Go To Background
private extension AppDelegate {
func waitForSyncTasksToFinish() {
guard !isWaitingForSyncTasks && UIApplication.shared.applicationState == .background else { return }
isWaitingForSyncTasks = true
self.waitBackgroundUpdateTask = UIApplication.shared.beginBackgroundTask { [weak self] in
guard let self = self else { return }
self.completeProcessing(true)
os_log("Accounts wait for progress terminated for running too long.", log: self.log, type: .info)
}
DispatchQueue.main.async { [weak self] in
self?.waitToComplete() { [weak self] suspend in
self?.completeProcessing(suspend)
}
}
}
func waitToComplete(completion: @escaping (Bool) -> Void) {
guard UIApplication.shared.applicationState == .background else {
os_log("App came back to forground, no longer waiting.", log: self.log, type: .info)
completion(false)
return
}
if AccountManager.shared.refreshInProgress || isSyncArticleStatusRunning {
os_log("Waiting for sync to finish...", log: self.log, type: .info)
DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) { [weak self] in
self?.waitToComplete(completion: completion)
}
} else {
os_log("Refresh progress complete.", log: self.log, type: .info)
completion(true)
}
}
func completeProcessing(_ suspend: Bool) {
if suspend {
suspendApplication()
}
UIApplication.shared.endBackgroundTask(self.waitBackgroundUpdateTask)
self.waitBackgroundUpdateTask = UIBackgroundTaskIdentifier.invalid
isWaitingForSyncTasks = false
}
func syncArticleStatus() {
guard !isSyncArticleStatusRunning else { return }
isSyncArticleStatusRunning = true
let completeProcessing = { [unowned self] in
self.isSyncArticleStatusRunning = false
UIApplication.shared.endBackgroundTask(self.syncBackgroundUpdateTask)
self.syncBackgroundUpdateTask = UIBackgroundTaskIdentifier.invalid
}
self.syncBackgroundUpdateTask = UIApplication.shared.beginBackgroundTask {
completeProcessing()
os_log("Accounts sync processing terminated for running too long.", log: self.log, type: .info)
}
DispatchQueue.main.async {
AccountManager.shared.syncArticleStatusAll() {
completeProcessing()
}
}
}
func suspendApplication() {
guard UIApplication.shared.applicationState == .background else { return }
AccountManager.shared.suspendNetworkAll()
CoalescingQueue.standard.performCallsImmediately()
for scene in UIApplication.shared.connectedScenes {
if let sceneDelegate = scene.delegate as? SceneDelegate {
sceneDelegate.suspend()
}
}
AccountManager.shared.suspendDatabaseAll()
os_log("Application processing suspended.", log: self.log, type: .info)
}
}
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// MARK: Background Tasks
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private extension AppDelegate {
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/// Register all background tasks.
func registerBackgroundTasks() {
// Register background feed refresh.
BGTaskScheduler.shared.register(forTaskWithIdentifier: "com.ranchero.NetNewsWire.FeedRefresh", using: nil) { (task) in
self.performBackgroundFeedRefresh(with: task as! BGAppRefreshTask)
}
}
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/// Schedules a background app refresh based on `AppDefaults.refreshInterval`.
func scheduleBackgroundFeedRefresh() {
let request = BGAppRefreshTaskRequest(identifier: "com.ranchero.NetNewsWire.FeedRefresh")
request.earliestBeginDate = Date(timeIntervalSinceNow: 15 * 60)
// We send this to a dedicated serial queue because as of 11/05/19 on iOS 13.2 the call to the
// task scheduler can hang indefinitely.
bgTaskDispatchQueue.async {
do {
try BGTaskScheduler.shared.submit(request)
} catch {
os_log(.error, log: self.log, "Could not schedule app refresh: %@", error.localizedDescription)
}
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}
}
/// Performs background feed refresh.
/// - Parameter task: `BGAppRefreshTask`
/// - Warning: As of Xcode 11 beta 2, when triggered from the debugger this doesn't work.
func performBackgroundFeedRefresh(with task: BGAppRefreshTask) {
scheduleBackgroundFeedRefresh() // schedule next refresh
os_log("Woken to perform account refresh.", log: self.log, type: .info)
DispatchQueue.main.async {
if AccountManager.shared.isSuspended {
AccountManager.shared.resumeAll()
}
AccountManager.shared.refreshAll(errorHandler: ErrorHandler.log) { [unowned self] in
if !AccountManager.shared.isSuspended {
self.suspendApplication()
os_log("Account refresh operation completed.", log: self.log, type: .info)
task.setTaskCompleted(success: true)
}
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}
}
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// set expiration handler
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task.expirationHandler = { [weak task] in
DispatchQueue.main.sync {
self.suspendApplication()
}
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os_log("Accounts refresh processing terminated for running too long.", log: self.log, type: .info)
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task?.setTaskCompleted(success: false)
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}
}
}