Supports viewing all NewsItems and StoreApps for a source

AltStore/News/NewsViewController.swift

@@ -43,6 +43,9 @@ private final class AppBannerFooterView: UICollectionReusableView
 
 class NewsViewController: UICollectionViewController, PeekPopPreviewing
 {
+    // Nil == Show news from all sources.
+    var source: Source?
+    
     private lazy var dataSource = self.makeDataSource()
     private lazy var placeholderView = RSTPlaceholderView(frame: .zero)
     
@@ -57,10 +60,24 @@ class NewsViewController: UICollectionViewController, PeekPopPreviewing
     // Cache
     private var cachedCellSizes = [String: CGSize]()
     
+    init?(source: Source?, coder: NSCoder)
+    {
+        self.source = source
+        
+        super.init(coder: coder)
+        
+        self.initialize()
+    }
+    
     required init?(coder: NSCoder)
     {
         super.init(coder: coder)
         
+        self.initialize()
+    }
+    
+    private func initialize()
+    {
         NotificationCenter.default.addObserver(self, selector: #selector(NewsViewController.importApp(_:)), name: AppDelegate.importAppDeepLinkNotification, object: nil)
     }
     
@@ -79,6 +96,22 @@ class NewsViewController: UICollectionViewController, PeekPopPreviewing
         
         (self as PeekPopPreviewing).registerForPreviewing(with: self, sourceView: self.collectionView)
         
+        if let source = self.source
+        {
+            let tintColor = source.effectiveTintColor ?? .altPrimary
+            self.view.tintColor = tintColor
+            
+            let appearance = NavigationBarAppearance()
+            appearance.configureWithTintColor(tintColor)
+            appearance.configureWithDefaultBackground()
+            
+            let edgeAppearance = appearance.copy()
+            edgeAppearance.configureWithTransparentBackground()
+            
+            self.navigationItem.standardAppearance = appearance
+            self.navigationItem.scrollEdgeAppearance = edgeAppearance
+        }
+        
         self.update()
     }
     
@@ -111,12 +144,11 @@ private extension NewsViewController
 {
     func makeDataSource() -> RSTFetchedResultsCollectionViewPrefetchingDataSource<NewsItem, UIImage>
     {
-        let fetchRequest = NewsItem.fetchRequest() as NSFetchRequest<NewsItem>
-        fetchRequest.sortDescriptors = [NSSortDescriptor(keyPath: \NewsItem.date, ascending: false),
-                                        NSSortDescriptor(keyPath: \NewsItem.sortIndex, ascending: true),
-                                        NSSortDescriptor(keyPath: \NewsItem.sourceIdentifier, ascending: true)]
+        let fetchRequest = NewsItem.sortedFetchRequest(for: self.source)
+        let context = self.source?.managedObjectContext ?? DatabaseManager.shared.viewContext
         
-        let fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: DatabaseManager.shared.viewContext, sectionNameKeyPath: #keyPath(NewsItem.objectID), cacheName: nil)
+        // Use fetchedResultsController to split NewsItems up into sections.
+        let fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: context, sectionNameKeyPath: #keyPath(NewsItem.objectID), cacheName: nil)
         
         let dataSource = RSTFetchedResultsCollectionViewPrefetchingDataSource<NewsItem, UIImage>(fetchedResultsController: fetchedResultsController)
         dataSource.proxy = self