Prioritizes app refresh order

Tries to refresh apps that are about to expire first, and then always refreshes AltStore itself last, since refreshing AltStore means that the app will quit.

AltStore/Model/AltStore.xcdatamodeld/AltStore.xcdatamodel/contents

@@ -34,6 +34,7 @@
     <entity name="InstalledApp" representedClassName="InstalledApp" syncable="YES">
         <attribute name="bundleIdentifier" attributeType="String" syncable="YES"/>
         <attribute name="expirationDate" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="refreshedDate" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
         <attribute name="version" attributeType="String" syncable="YES"/>
         <relationship name="app" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="App" inverseName="installedApp" inverseEntity="App" syncable="YES"/>
         <uniquenessConstraints>
@@ -57,7 +58,7 @@
     <elements>
         <element name="Account" positionX="-36" positionY="90" width="128" height="135"/>
         <element name="App" positionX="-63" positionY="-18" width="128" height="210"/>
-        <element name="InstalledApp" positionX="-63" positionY="0" width="128" height="105"/>
+        <element name="InstalledApp" positionX="-63" positionY="0" width="128" height="120"/>
         <element name="Team" positionX="-45" positionY="81" width="128" height="120"/>
     </elements>
 </model>

AltStore/Model/DatabaseManager.swift

@@ -8,6 +8,7 @@
 
 import CoreData
 
+import AltSign
 import Roxas
 
 public class DatabaseManager
@@ -120,14 +121,23 @@ private extension DatabaseManager
                 altStoreApp.version = version
             }
             
-            if let installedApp = altStoreApp.installedApp
+            let installedApp: InstalledApp
+            
+            if let app = altStoreApp.installedApp
             {
-                installedApp.version = version
+                installedApp = app
             }
             else
             {
-                let installedApp = InstalledApp(app: altStoreApp, bundleIdentifier: altStoreApp.identifier, expirationDate: Date(), context: context)
-                installedApp.version = version
+                installedApp = InstalledApp(app: altStoreApp, bundleIdentifier: altStoreApp.identifier, context: context)
+            }
+            
+            installedApp.version = version
+            
+            if let provisioningProfileURL = Bundle.main.url(forResource: "embedded", withExtension: "mobileprovision"), let provisioningProfile = ALTProvisioningProfile(url: provisioningProfileURL)
+            {
+                installedApp.refreshedDate = provisioningProfile.creationDate
+                installedApp.expirationDate = provisioningProfile.expirationDate
             }
             
             do

AltStore/Model/InstalledApp.swift

@@ -16,6 +16,7 @@ class InstalledApp: NSManagedObject, Fetchable
     @NSManaged var bundleIdentifier: String
     @NSManaged var version: String
     
+    @NSManaged var refreshedDate: Date
     @NSManaged var expirationDate: Date
     
     /* Relationships */
@@ -26,7 +27,7 @@ class InstalledApp: NSManagedObject, Fetchable
         super.init(entity: entity, insertInto: context)
     }
     
-    init(app: App, bundleIdentifier: String, expirationDate: Date, context: NSManagedObjectContext)
+    init(app: App, bundleIdentifier: String, context: NSManagedObjectContext)
     {
         super.init(entity: InstalledApp.entity(), insertInto: context)
         
@@ -35,7 +36,9 @@ class InstalledApp: NSManagedObject, Fetchable
         self.version = app.version
         
         self.bundleIdentifier = bundleIdentifier
-        self.expirationDate = expirationDate
+        
+        self.refreshedDate = Date()
+        self.expirationDate = self.refreshedDate.addingTimeInterval(60 * 60 * 24 * 7) // Rough estimate until we get real values from provisioning profile.
     }
 }
 
@@ -45,6 +48,52 @@ extension InstalledApp
     {
         return NSFetchRequest<InstalledApp>(entityName: "InstalledApp")
     }
+    
+    class func fetchAltStore(in context: NSManagedObjectContext) -> InstalledApp?
+    {
+        let predicate = NSPredicate(format: "%K == %@", #keyPath(InstalledApp.app.identifier), App.altstoreAppID)
+        
+        let altStore = InstalledApp.first(satisfying: predicate, in: context)
+        return altStore
+    }
+    
+    class func fetchAppsForRefreshingAll(in context: NSManagedObjectContext) -> [InstalledApp]
+    {
+        let predicate = NSPredicate(format: "%K != %@", #keyPath(InstalledApp.app.identifier), App.altstoreAppID)
+        
+        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]
+    {
+        let date = Date().addingTimeInterval(-120)
+        
+        let predicate = NSPredicate(format: "(%K < %@) AND (%K != %@)",
+                                    #keyPath(InstalledApp.refreshedDate), date as NSDate,
+                                    #keyPath(InstalledApp.app.identifier), App.altstoreAppID)
+        
+        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 causes app to quit.
+            installedApps.append(altStoreApp)
+        }
+        
+        return installedApps
+    }
 }
 
 extension InstalledApp
@@ -67,10 +116,10 @@ extension InstalledApp
         return appsDirectoryURL
     }
     
-    class func ipaURL(for app: App) -> URL
+    class func fileURL(for app: App) -> URL
     {
-        let ipaURL = self.directoryURL(for: app).appendingPathComponent("App.ipa")
-        return ipaURL
+        let appURL = self.directoryURL(for: app).appendingPathComponent("App.app")
+        return appURL
     }
     
     class func refreshedIPAURL(for app: App) -> URL
@@ -79,7 +128,6 @@ extension InstalledApp
         return ipaURL
     }
     
-    
     class func directoryURL(for app: App) -> URL
     {
         let directoryURL = InstalledApp.appsDirectoryURL.appendingPathComponent(app.identifier)
@@ -94,8 +142,8 @@ extension InstalledApp
         return InstalledApp.directoryURL(for: self.app)
     }
     
-    var ipaURL: URL {
-        return InstalledApp.ipaURL(for: self.app)
+    var fileURL: URL {
+        return InstalledApp.fileURL(for: self.app)
     }
     
     var refreshedIPAURL: URL {