Apply code style

Author: wuyuehyang

Mixin/UserInterface/Controllers/Chat/GalleryVideoItemViewController.swift

@@ -478,6 +478,7 @@ extension GalleryVideoItemViewController {
                 playerDidReachEnd = false
                 player.seek(to: .zero)
             }
+            Logger.general.info(category: "GalleryVideoItemViewController", message: "Playing video")
             player.play()
         } else if let url = item.url {
             controlView.style.insert(.loading)
@@ -570,13 +571,13 @@ extension GalleryVideoItemViewController {
         updateControlView(playControlsHidden: false, otherControlsHidden: false, animated: true)
         removeTimeObservers()
         AudioSession.shared.deactivateAsynchronously(client: self, notifyOthersOnDeactivation: false)
-        let message: String
+        let errorDescription: String
         if let error = notification.userInfo?[AVPlayerItemFailedToPlayToEndTimeErrorKey] as? Error {
-            message = error.localizedDescription
+            errorDescription = error.localizedDescription
         } else {
-            message = ""
+            errorDescription = "(null)"
         }
-        Logger.general.error(category: "GalleryVideoItemViewController", message: "Player item failed to play to end time: \(message)")
+        Logger.general.error(category: "GalleryVideoItemViewController", message: "Player item failed to play to end time: \(errorDescription)")
     }
 
     @objc private func playerItemNewErrorLogEntry(_ notification: Notification) {
@@ -657,6 +658,7 @@ extension GalleryVideoItemViewController {
         func showReloadAndReport(error: Error?) {
             if let error = error {
                 reporter.report(error: error)
+                Logger.general.error(category: "GalleryVideoItemViewController", message: "Failed to load asset: \(error)")
             }
             controlView.style.remove(.loading)
             controlView.playControlStyle = .reload
@@ -688,30 +690,41 @@ extension GalleryVideoItemViewController {
     private func load(playableAsset asset: AVURLAsset, playAfterLoaded: Bool) {
         guard asset.isPlayable else {
             // TODO: UI Update
+            Logger.general.error(category: "GalleryVideoItemViewController", message: "Asset is not playable")
             return
         }
         removeAllObservers()
 
         let item = AVPlayerItem(asset: asset)
         itemStatusObserver = item.observe(\.status, options: [.initial, .new]) { [weak self] (item, change) in
             // Known issue: https://bugs.swift.org/browse/SR-5872
-            // 'change' are always nil here
+            // 'change' is always nil here
             self?.updateControlView()
-            if case .failed = item.status, let error = item.error {
-                Logger.general.error(category: "GalleryVideoItemViewController", message: "Player item can no longer be played because of an error: \(error)")
-            } else if case .unknown = item.status {
-                Logger.general.error(category: "GalleryVideoItemViewController", message: "Player item has not tried to load new media resources for playback")
+            switch item.status {
+            case .readyToPlay:
+                break
+            case .failed:
+                Logger.general.error(category: "GalleryVideoItemViewController", message: "Player item failed: \(item.error?.localizedDescription ?? "(null)")")
+            case .unknown:
+                Logger.general.info(category: "GalleryVideoItemViewController", message: "Player item becomes unknown")
+            @unknown default:
+                Logger.general.info(category: "GalleryVideoItemViewController", message: "Player item status: \(item.status.rawValue)")
             }
         }
         itemPresentationSizeObserver = item.observe(\.presentationSize) { [weak self] (item, _) in
             self?.updateVideoViewSize(with: item)
         }
-                
+        
         playerStatusObserver = player.observe(\.status, options: [.initial, .new]) { player, _ in
-            if case .failed = player.status, let error = player.error {
-                Logger.general.error(category: "GalleryVideoItemViewController", message: "Player can no longer play AVPlayerItem instances because of an error: \(error)")
-            } else if case .unknown = player.status {
-                Logger.general.error(category: "GalleryVideoItemViewController", message: "Player has not tried to load new media resources for playback")
+            switch player.status {
+            case .readyToPlay:
+                break
+            case .failed:
+                Logger.general.error(category: "GalleryVideoItemViewController", message: "Player failed: \(player.error?.localizedDescription ?? "(null)")")
+            case .unknown:
+                Logger.general.info(category: "GalleryVideoItemViewController", message: "Player becomes unknown")
+            @unknown default:
+                Logger.general.info(category: "GalleryVideoItemViewController", message: "Player status: \(player.status.rawValue)")
             }
         }
 
@@ -750,6 +763,7 @@ extension GalleryVideoItemViewController {
                 Logger.general.error(category: "GalleryVideoItemViewController", message: "AudioSession activate error: \(error)")
             }
             player.isMuted = mute
+            Logger.general.info(category: "GalleryVideoItemViewController", message: "Playing video")
             player.play()
         }
     }