Adds missing dir

Author: shaps80

Sources/ComposedMediaUI/MediaViewController.swift

@@ -0,0 +1,55 @@
+import UIKit
+import Composed
+import ComposedUI
+import ComposedLayouts
+
+open class MediaViewController: UIViewController {
+
+    open private(set) lazy var collectionView: UICollectionView = {
+        return UICollectionView(frame: .zero, collectionViewLayout: layout)
+    }()
+
+    open private(set) lazy var collectionCoordinator: CollectionCoordinator = {
+        #warning("Replace with appropriate provider when available")
+        let provider = ComposedSectionProvider()
+        return CollectionCoordinator(collectionView: collectionView, sectionProvider: provider)
+    }()
+
+    private lazy var layout: UICollectionViewLayout = {
+        let layout: UICollectionViewLayout
+
+        if #available(iOS 13.0, *) {
+            return UICollectionViewCompositionalLayout { [weak self] index, environment in
+                guard let self = self,
+                    self.collectionCoordinator.sectionProvider.sections.indices.contains(index),
+                    let section = self.collectionCoordinator.sectionProvider.sections[index] as? CompositionalLayoutHandler else { return nil }
+                return section.compositionalLayoutSection(environment: environment)
+            }
+        } else {
+            return UICollectionViewFlowLayout()
+        }
+    }()
+
+    open override func viewDidLoad() {
+        super.viewDidLoad()
+
+        if #available(iOS 13.0, *) {
+            collectionView.backgroundColor = .systemBackground
+        } else {
+            collectionView.backgroundColor = .groupTableViewBackground
+        }
+
+        collectionView.alwaysBounceVertical = true
+        collectionView.setCollectionViewLayout(layout, animated: false)
+        collectionView.frame = view.bounds
+        collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        view.addSubview(collectionView)
+    }
+
+    /// Required specifically for `UICollectionViewFlowLayout` since some rotations don't cause an invalidation!?
+    open override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
+        super.viewWillTransition(to: size, with: coordinator)
+        self.collectionCoordinator.invalidateLayout()
+    }
+
+}