Switches to Core Data model objects

AltStore/Model/DatabaseManager.swift

@@ -0,0 +1,48 @@
+//
+//  DatabaseManager.swift
+//  AltStore
+//
+//  Created by Riley Testut on 5/20/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import CoreData
+
+import Roxas
+
+public class DatabaseManager
+{
+    public static let shared = DatabaseManager()
+    
+    public let persistentContainer: RSTPersistentContainer
+    
+    public private(set) var isStarted = false
+    
+    private init()
+    {
+        self.persistentContainer = RSTPersistentContainer(name: "AltStore")
+    }
+}
+
+public extension DatabaseManager
+{
+    func start(completionHandler: @escaping (Error?) -> Void)
+    {
+        guard !self.isStarted else { return completionHandler(nil) }
+        
+        self.persistentContainer.loadPersistentStores { (description, error) in
+            guard error == nil else { return completionHandler(error!) }
+            
+            self.isStarted = true
+            
+            completionHandler(error)
+        }
+    }
+}
+
+public extension DatabaseManager
+{
+    var viewContext: NSManagedObjectContext {
+        return self.persistentContainer.viewContext
+    }
+}