Multiplatform playing first steps

Shared/PlayerViewController.swift

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+import AVKit
+import Logging
+import SwiftUI
+
+final class PlayerViewController: UIViewController {
+    var video: Video!
+
+    var playerLoaded = false
+    var playingFullScreen = false
+
+    var player = AVPlayer()
+    var playerState: PlayerState! = PlayerState()
+    var playerViewController = AVPlayerViewController()
+
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+
+        if !playerLoaded {
+            loadPlayer()
+        }
+
+        try? AVAudioSession.sharedInstance().setCategory(.playback, mode: .default)
+        try? AVAudioSession.sharedInstance().setActive(true)
+    }
+
+    override func viewDidDisappear(_ animated: Bool) {
+        #if os(iOS)
+            if !playingFullScreen {
+                playerViewController.player?.replaceCurrentItem(with: nil)
+                playerViewController.player = nil
+            }
+        #endif
+
+        super.viewDidDisappear(animated)
+    }
+
+    func loadPlayer() {
+        playerState.player = player
+        playerViewController.player = playerState.player
+        playerState.loadVideo(video)
+
+        #if os(tvOS)
+            present(playerViewController, animated: false)
+        #else
+            playerViewController.exitsFullScreenWhenPlaybackEnds = true
+            playerViewController.view.frame = view.bounds
+
+            addChild(playerViewController)
+            view.addSubview(playerViewController.view)
+
+            playerViewController.didMove(toParent: self)
+        #endif
+
+        playerViewController.delegate = self
+        playerLoaded = true
+    }
+}
+
+extension PlayerViewController: AVPlayerViewControllerDelegate {
+    func playerViewControllerShouldDismiss(_: AVPlayerViewController) -> Bool {
+        true
+    }
+
+    func playerViewControllerWillBeginDismissalTransition(_: AVPlayerViewController) {
+        dismiss(animated: false)
+    }
+
+    func playerViewController(
+        _: AVPlayerViewController,
+        willBeginFullScreenPresentationWithAnimationCoordinator _: UIViewControllerTransitionCoordinator
+    ) {
+        playingFullScreen = true
+    }
+
+    func playerViewController(
+        _: AVPlayerViewController,
+        willEndFullScreenPresentationWithAnimationCoordinator _: UIViewControllerTransitionCoordinator
+    ) {
+        playingFullScreen = false
+    }
+}