feat: implement onAudioTracks and onTextTracks on ios (#3503)

* feat: implement onAudioTracks and onTextTracks on ios

* chore: lint code

* fix: rework previous fix to fix linter and be more aligned with architecture

---------

Co-authored-by: olivier <olivier.bouillet@ifeelsmart.com>

ios/Video/Features/RCTPlayerObserver.swift

@@ -25,6 +25,7 @@ protocol RCTPlayerObserverHandler: RCTPlayerObserverHandlerObjc {
     func handleVolumeChange(player: AVPlayer, change: NSKeyValueObservedChange<Float>)
     func handleExternalPlaybackActiveChange(player: AVPlayer, change: NSKeyValueObservedChange<Bool>)
     func handleViewControllerOverlayViewFrameChange(overlayView: UIView, change: NSKeyValueObservedChange<CGRect>)
+    func handleTracksChange(playerItem: AVPlayerItem, change: NSKeyValueObservedChange<[AVPlayerItemTrack]>)
 }
 
 // MARK: - RCTPlayerObserver
@@ -96,6 +97,7 @@ class RCTPlayerObserver: NSObject, AVPlayerItemMetadataOutputPushDelegate {
     private var _playerViewControllerReadyForDisplayObserver: NSKeyValueObservation?
     private var _playerLayerReadyForDisplayObserver: NSKeyValueObservation?
     private var _playerViewControllerOverlayFrameObserver: NSKeyValueObservation?
+    private var _playerTracksObserver: NSKeyValueObservation?
 
     deinit {
         if let _handlers {
@@ -141,6 +143,13 @@ class RCTPlayerObserver: NSObject, AVPlayerItemMetadataOutputPushDelegate {
             options: [.new, .old],
             changeHandler: _handlers.handlePlaybackLikelyToKeepUp
         )
+
+        // observe tracks update
+        _playerTracksObserver = playerItem.observe(
+            \.tracks,
+            options: [.new, .old],
+            changeHandler: _handlers.handleTracksChange
+        )
     }
 
     func removePlayerItemObservers() {
@@ -148,6 +157,7 @@ class RCTPlayerObserver: NSObject, AVPlayerItemMetadataOutputPushDelegate {
         _playerPlaybackBufferEmptyObserver?.invalidate()
         _playerPlaybackLikelyToKeepUpObserver?.invalidate()
         _playerTimedMetadataObserver?.invalidate()
+        _playerTracksObserver?.invalidate()
     }
 
     func addPlayerViewControllerObservers() {

ios/Video/RCTVideo.swift

@@ -116,6 +116,8 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
     @objc var onRestoreUserInterfaceForPictureInPictureStop: RCTDirectEventBlock?
     @objc var onGetLicense: RCTDirectEventBlock?
     @objc var onReceiveAdEvent: RCTDirectEventBlock?
+    @objc var onTextTracks: RCTDirectEventBlock?
+    @objc var onAudioTracks: RCTDirectEventBlock?
 
     @objc
     func _onPictureInPictureStatusChanged() {
@@ -367,7 +369,9 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
                     }
 
                     self._player = self._player ?? AVPlayer()
+
                     self._player?.replaceCurrentItem(with: playerItem)
+
                     self._playerObserver.player = self._player
                     self.applyModifiers()
                     self._player?.actionAtItemEnd = .none
@@ -1371,4 +1375,11 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
 
         onVideoBandwidthUpdate?(["bitrate": lastEvent.observedBitrate, "target": reactTag])
     }
+
+    func handleTracksChange(playerItem _: AVPlayerItem, change _: NSKeyValueObservedChange<[AVPlayerItemTrack]>) {
+        all(RCTVideoUtils.getAudioTrackInfo(self._player), RCTVideoUtils.getTextTrackInfo(self._player)).then { audioTracks, textTracks in
+            self.onTextTracks?(["textTracks": textTracks])
+            self.onAudioTracks?(["audioTracks": audioTracks])
+        }
+    }
 }

ios/Video/RCTVideoManager.m

@@ -64,6 +64,8 @@ RCT_EXPORT_VIEW_PROPERTY(onGetLicense, RCTDirectEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onPictureInPictureStatusChanged, RCTDirectEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onRestoreUserInterfaceForPictureInPictureStop, RCTDirectEventBlock);
 RCT_EXPORT_VIEW_PROPERTY(onReceiveAdEvent, RCTDirectEventBlock);
+RCT_EXPORT_VIEW_PROPERTY(onTextTracks, RCTDirectEventBlock);
+RCT_EXPORT_VIEW_PROPERTY(onAudioTracks, RCTDirectEventBlock);
 
 RCT_EXTERN_METHOD(save
                   : (NSDictionary*)options reactTag