Adds basic UpdatesViewController implementation

AltStore/Updates/UpdatesViewController.swift

@@ -0,0 +1,76 @@
+//
+//  UpdatesViewController.swift
+//  AltStore
+//
+//  Created by Riley Testut on 5/20/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+import Roxas
+
+class UpdatesViewController: UITableViewController
+{
+    private lazy var dataSource = self.makeDataSource()
+    
+    private lazy var dateFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.dateStyle = .short
+        dateFormatter.timeStyle = .none
+        return dateFormatter
+    }()
+    
+    override func viewDidLoad()
+    {
+        super.viewDidLoad()
+        
+        self.tableView.dataSource = self.dataSource
+    }
+    
+    override func viewDidAppear(_ animated: Bool)
+    {
+        super.viewDidAppear(animated)
+        
+        let count = self.tableView.numberOfRows(inSection: 0)
+        self.navigationController?.tabBarItem.badgeValue = count > 0 ? String(describing: count) : nil
+    }
+    
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?)
+    {
+        guard segue.identifier == "showAppDetail" else { return }
+        
+        guard let cell = sender as? UITableViewCell, let indexPath = self.tableView.indexPath(for: cell) else { return }
+        
+        let installedApp = self.dataSource.item(at: indexPath)
+        guard let app = installedApp.app else { return }
+        
+        let appDetailViewController = segue.destination as! AppDetailViewController
+        appDetailViewController.app = app
+    }
+}
+
+private extension UpdatesViewController
+{
+    func makeDataSource() -> RSTFetchedResultsTableViewDataSource<InstalledApp>
+    {
+        let fetchRequest = InstalledApp.fetchRequest() as NSFetchRequest<InstalledApp>
+        fetchRequest.predicate = NSPredicate(format: "%K != %K", #keyPath(InstalledApp.version), #keyPath(InstalledApp.app.version))
+        fetchRequest.sortDescriptors = [NSSortDescriptor(keyPath: \InstalledApp.app?.versionDate, ascending: false)]
+        fetchRequest.returnsObjectsAsFaults = false
+        
+        let dataSource = RSTFetchedResultsTableViewDataSource(fetchRequest: fetchRequest, managedObjectContext: DatabaseManager.shared.viewContext)
+        dataSource.cellConfigurationHandler = { (cell, installedApp, indexPath) in
+            guard let app = installedApp.app else { return }
+            
+            cell.textLabel?.text = app.name + " (\(app.version))"
+            
+            let detailText = self.dateFormatter.string(from: app.versionDate) + "\n\n" + (app.versionDescription ?? "No Update Description")
+            
+            cell.detailTextLabel?.numberOfLines = 0
+            cell.detailTextLabel?.text = detailText
+        }
+        
+        return dataSource
+    }
+}