[AltStoreCore] Refactors core AltStore logic into AltStoreCore framework

AltStoreCore will contain all shared AltStore code between AltStore and any app extensions. Initially, it includes all AltStore model logic.

AltStoreCore/Model/InstalledApp.swift

@@ -0,0 +1,280 @@
+//
+//  InstalledApp.swift
+//  AltStore
+//
+//  Created by Riley Testut on 5/20/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+import AltSign
+
+// Free developer accounts are limited to only 3 active sideloaded apps at a time as of iOS 13.3.1.
+public let ALTActiveAppsLimit = 3
+
+public protocol InstalledAppProtocol: Fetchable
+{
+    var name: String { get }
+    var bundleIdentifier: String { get }
+    var resignedBundleIdentifier: String { get }
+    var version: String { get }
+    
+    var refreshedDate: Date { get }
+    var expirationDate: Date { get }
+    var installedDate: Date { get }
+}
+
+@objc(InstalledApp)
+public class InstalledApp: NSManagedObject, InstalledAppProtocol
+{
+    /* Properties */
+    @NSManaged public var name: String
+    @NSManaged public var bundleIdentifier: String
+    @NSManaged public var resignedBundleIdentifier: String
+    @NSManaged public var version: String
+    
+    @NSManaged public var refreshedDate: Date
+    @NSManaged public var expirationDate: Date
+    @NSManaged public var installedDate: Date
+    
+    @NSManaged public var isActive: Bool
+    
+    @NSManaged public var certificateSerialNumber: String?
+    
+    /* Relationships */
+    @NSManaged public var storeApp: StoreApp?
+    @NSManaged public var team: Team?
+    @NSManaged public var appExtensions: Set<InstalledExtension>
+    
+    public var isSideloaded: Bool {
+        return self.storeApp == nil
+    }
+    
+    public var appIDCount: Int {
+        return 1 + self.appExtensions.count
+    }
+    
+    public var requiredActiveSlots: Int {
+        let requiredActiveSlots = UserDefaults.standard.activeAppLimitIncludesExtensions ? self.appIDCount : 1
+        return requiredActiveSlots
+    }
+    
+    private override init(entity: NSEntityDescription, insertInto context: NSManagedObjectContext?)
+    {
+        super.init(entity: entity, insertInto: context)
+    }
+    
+    public init(resignedApp: ALTApplication, originalBundleIdentifier: String, certificateSerialNumber: String?, context: NSManagedObjectContext)
+    {
+        super.init(entity: InstalledApp.entity(), insertInto: context)
+        
+        self.bundleIdentifier = originalBundleIdentifier
+        
+        self.refreshedDate = Date()
+        self.installedDate = Date()
+        
+        self.expirationDate = self.refreshedDate.addingTimeInterval(60 * 60 * 24 * 7) // Rough estimate until we get real values from provisioning profile.
+        
+        self.update(resignedApp: resignedApp, certificateSerialNumber: certificateSerialNumber)
+    }
+    
+    public func update(resignedApp: ALTApplication, certificateSerialNumber: String?)
+    {
+        self.name = resignedApp.name
+        
+        self.resignedBundleIdentifier = resignedApp.bundleIdentifier
+        self.version = resignedApp.version
+        
+        self.certificateSerialNumber = certificateSerialNumber
+
+        if let provisioningProfile = resignedApp.provisioningProfile
+        {
+            self.update(provisioningProfile: provisioningProfile)
+        }
+    }
+    
+    public func update(provisioningProfile: ALTProvisioningProfile)
+    {
+        self.refreshedDate = provisioningProfile.creationDate
+        self.expirationDate = provisioningProfile.expirationDate
+    }
+}
+
+public extension InstalledApp
+{
+    @nonobjc class func fetchRequest() -> NSFetchRequest<InstalledApp>
+    {
+        return NSFetchRequest<InstalledApp>(entityName: "InstalledApp")
+    }
+    
+    class func updatesFetchRequest() -> NSFetchRequest<InstalledApp>
+    {
+        let fetchRequest = InstalledApp.fetchRequest() as NSFetchRequest<InstalledApp>
+        fetchRequest.predicate = NSPredicate(format: "%K == YES AND %K != nil AND %K != %K",
+                                             #keyPath(InstalledApp.isActive), #keyPath(InstalledApp.storeApp), #keyPath(InstalledApp.version), #keyPath(InstalledApp.storeApp.version))
+        return fetchRequest
+    }
+    
+    class func activeAppsFetchRequest() -> NSFetchRequest<InstalledApp>
+    {
+        let fetchRequest = InstalledApp.fetchRequest() as NSFetchRequest<InstalledApp>
+        fetchRequest.predicate = NSPredicate(format: "%K == YES", #keyPath(InstalledApp.isActive))
+        return fetchRequest
+    }
+    
+    class func fetchAltStore(in context: NSManagedObjectContext) -> InstalledApp?
+    {
+        let predicate = NSPredicate(format: "%K == %@", #keyPath(InstalledApp.bundleIdentifier), StoreApp.altstoreAppID)
+        
+        let altStore = InstalledApp.first(satisfying: predicate, in: context)
+        return altStore
+    }
+    
+    class func fetchActiveApps(in context: NSManagedObjectContext) -> [InstalledApp]
+    {
+        let activeApps = InstalledApp.fetch(InstalledApp.activeAppsFetchRequest(), in: context)
+        return activeApps
+    }
+    
+    class func fetchAppsForRefreshingAll(in context: NSManagedObjectContext) -> [InstalledApp]
+    {
+        var predicate = NSPredicate(format: "%K == YES AND %K != %@", #keyPath(InstalledApp.isActive), #keyPath(InstalledApp.bundleIdentifier), StoreApp.altstoreAppID)
+        
+        if let patreonAccount = DatabaseManager.shared.patreonAccount(in: context), patreonAccount.isPatron, PatreonAPI.shared.isAuthenticated
+        {
+            // No additional predicate
+        }
+        else
+        {
+            predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [predicate,
+                                                                            NSPredicate(format: "%K == nil OR %K == NO", #keyPath(InstalledApp.storeApp), #keyPath(InstalledApp.storeApp.isBeta))])
+        }
+        
+        var installedApps = InstalledApp.all(satisfying: predicate,
+                                             sortedBy: [NSSortDescriptor(keyPath: \InstalledApp.expirationDate, ascending: true)],
+                                             in: context)
+        
+        if let altStoreApp = InstalledApp.fetchAltStore(in: context)
+        {
+            // Refresh AltStore last since it causes app to quit.
+            installedApps.append(altStoreApp)
+        }
+        
+        return installedApps
+    }
+    
+    class func fetchAppsForBackgroundRefresh(in context: NSManagedObjectContext) -> [InstalledApp]
+    {
+        // Date 6 hours before now.
+        let date = Date().addingTimeInterval(-1 * 6 * 60 * 60)
+        
+        var predicate = NSPredicate(format: "(%K == YES) AND (%K < %@) AND (%K != %@)",
+                                    #keyPath(InstalledApp.isActive),
+                                    #keyPath(InstalledApp.refreshedDate), date as NSDate,
+                                    #keyPath(InstalledApp.bundleIdentifier), StoreApp.altstoreAppID)
+        
+        if let patreonAccount = DatabaseManager.shared.patreonAccount(in: context), patreonAccount.isPatron, PatreonAPI.shared.isAuthenticated
+        {
+            // No additional predicate
+        }
+        else
+        {
+            predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [predicate,
+                                                                            NSPredicate(format: "%K == nil OR %K == NO", #keyPath(InstalledApp.storeApp), #keyPath(InstalledApp.storeApp.isBeta))])
+        }
+        
+        var installedApps = InstalledApp.all(satisfying: predicate,
+                                             sortedBy: [NSSortDescriptor(keyPath: \InstalledApp.expirationDate, ascending: true)],
+                                             in: context)
+        
+        if let altStoreApp = InstalledApp.fetchAltStore(in: context), altStoreApp.refreshedDate < date
+        {
+            // Refresh AltStore last since it may cause app to quit.
+            installedApps.append(altStoreApp)
+        }
+        
+        return installedApps
+    }
+}
+
+public extension InstalledApp
+{
+    var openAppURL: URL {
+        let openAppURL = URL(string: "altstore-" + self.bundleIdentifier + "://")!
+        return openAppURL
+    }
+    
+    class func openAppURL(for app: AppProtocol) -> URL
+    {
+        let openAppURL = URL(string: "altstore-" + app.bundleIdentifier + "://")!
+        return openAppURL
+    }
+}
+
+public extension InstalledApp
+{
+    class var appsDirectoryURL: URL {
+        let appsDirectoryURL = FileManager.default.applicationSupportDirectory.appendingPathComponent("Apps")
+        
+        do { try FileManager.default.createDirectory(at: appsDirectoryURL, withIntermediateDirectories: true, attributes: nil) }
+        catch { print(error) }
+        
+        return appsDirectoryURL
+    }
+    
+    class func fileURL(for app: AppProtocol) -> URL
+    {
+        let appURL = self.directoryURL(for: app).appendingPathComponent("App.app")
+        return appURL
+    }
+    
+    class func refreshedIPAURL(for app: AppProtocol) -> URL
+    {
+        let ipaURL = self.directoryURL(for: app).appendingPathComponent("Refreshed.ipa")
+        return ipaURL
+    }
+    
+    class func directoryURL(for app: AppProtocol) -> URL
+    {
+        let directoryURL = InstalledApp.appsDirectoryURL.appendingPathComponent(app.bundleIdentifier)
+        
+        do { try FileManager.default.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil) }
+        catch { print(error) }
+        
+        return directoryURL
+    }
+    
+    class func installedAppUTI(forBundleIdentifier bundleIdentifier: String) -> String
+    {
+        let installedAppUTI = "io.altstore.Installed." + bundleIdentifier
+        return installedAppUTI
+    }
+    
+    class func installedBackupAppUTI(forBundleIdentifier bundleIdentifier: String) -> String
+    {
+        let installedBackupAppUTI = InstalledApp.installedAppUTI(forBundleIdentifier: bundleIdentifier) + ".backup"
+        return installedBackupAppUTI
+    }
+    
+    var directoryURL: URL {
+        return InstalledApp.directoryURL(for: self)
+    }
+    
+    var fileURL: URL {
+        return InstalledApp.fileURL(for: self)
+    }
+    
+    var refreshedIPAURL: URL {
+        return InstalledApp.refreshedIPAURL(for: self)
+    }
+    
+    var installedAppUTI: String {
+        return InstalledApp.installedAppUTI(forBundleIdentifier: self.resignedBundleIdentifier)
+    }
+    
+    var installedBackupAppUTI: String {
+        return InstalledApp.installedBackupAppUTI(forBundleIdentifier: self.resignedBundleIdentifier)
+    }
+}