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[AltStore] Improves reliability of background app refresh

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This commit is contained in:
Riley Testut
2019-07-01 17:13:55 -07:00
parent b795b6a0aa
commit 6dd7709364
1 changed files with 50 additions and 31 deletions
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81
AltStore/AppDelegate.swift
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@@ -8,6 +8,7 @@
import UIKit
import UserNotifications
import AVFoundation
import AltSign
import Roxas
@@ -42,9 +43,12 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
private var runningApplications: Set<String>?
private var isLaunching = false
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool
{
self.isLaunching = true
ServerManager.shared.startDiscovering()
DatabaseManager.shared.start { (error) in
@@ -69,10 +73,14 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
}
self.prepareForBackgroundFetch()
DispatchQueue.main.async {
self.isLaunching = false
}
return true
}
func applicationDidEnterBackground(_ application: UIApplication)
{
ServerManager.shared.stopDiscovering()
@@ -98,8 +106,14 @@ extension AppDelegate
func application(_ application: UIApplication, performFetchWithCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void)
{
let isLaunching = self.isLaunching
let installedApps = InstalledApp.fetchAppsForBackgroundRefresh(in: DatabaseManager.shared.viewContext)
guard !installedApps.isEmpty else { return completionHandler(.noData) }
guard !installedApps.isEmpty else {
ServerManager.shared.stopDiscovering()
completionHandler(.noData)
return
}
self.runningApplications = []
@@ -119,26 +133,6 @@ extension AppDelegate
}
}
ServerManager.shared.startDiscovering()
let content = UNMutableNotificationContent()
content.title = NSLocalizedString("Refreshing apps...", comment: "")
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 0.01, repeats: false)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { (error) in
if let error = error {
print(error)
}
}
// Sleep for three seconds to:
// a) give us time to discover AltServers
// b) give other processes a chance to respond to requestAppState notification
// NOTE: We need to sleep, *not* DispatchQueue.asyncAfter, or else background audio might fail to start.
Thread.sleep(forTimeInterval: 3)
BackgroundTaskManager.shared.performExtendedBackgroundTask { (taskResult, taskCompletionHandler) in
func finish(_ result: Result<[String: Result<InstalledApp, Error>], Error>)
@@ -161,6 +155,26 @@ extension AppDelegate
content.title = NSLocalizedString("Refreshed all apps!", comment: "")
}
catch let error as NSError where
(error.domain == NSOSStatusErrorDomain || error.domain == AVFoundationErrorDomain) &&
error.code == AVAudioSession.ErrorCode.cannotStartPlaying.rawValue &&
!isLaunching
{
// We can only start background audio when the app is being launched,
// and _not_ if it's already suspended in background.
// Since we are currently suspended in background and not launching, we'll just ignore the error.
shouldPresentAlert = false
#if DEBUG
let content = UNMutableNotificationContent()
content.title = NSLocalizedString("Failed to Refresh Apps", comment: "")
content.body = NSLocalizedString("AltStore is currently suspended in the background.", comment: "")
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: nil)
UNUserNotificationCenter.current().add(request)
#endif
}
catch
{
print("Failed to refresh apps in background.", error)
@@ -173,14 +187,8 @@ extension AppDelegate
if shouldPresentAlert
{
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 0.01, repeats: false)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { (error) in
if let error = error {
print(error)
}
}
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: nil)
UNUserNotificationCenter.current().add(request)
}
switch result
@@ -193,6 +201,14 @@ extension AppDelegate
taskCompletionHandler()
}
#if DEBUG
let content = UNMutableNotificationContent()
content.title = NSLocalizedString("Refreshing apps...", comment: "")
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: nil)
UNUserNotificationCenter.current().add(request)
#endif
if let error = taskResult.error
{
print("Error starting extended background task. Aborting.", error)
@@ -200,7 +216,10 @@ extension AppDelegate
return
}
DispatchQueue.main.async {
// Wait for three seconds to:
// a) give us time to discover AltServers
// b) give other processes a chance to respond to requestAppState notification
DispatchQueue.main.asyncAfter(deadline: .now() + 3.0) {
let filteredApps = installedApps.filter { !(self.runningApplications?.contains($0.app.identifier) ?? false) }
print("Filtered Apps to Refresh:", filteredApps.map { $0.app.identifier })