On NC, don't load the embedded player on auth page nor on shared file

The typed dispatcher event BeforeTemplateRenderEvent on Nextcloud from the
Files_Sharing app tells us if the loaded view is the authentication page of
a password-protected share and if the shared node type is file or folder. On
NC, we anyway are using the embedded player only on folder shares and now we
can avoid the unnecessary loading of our module on the authentication page or
on the share page of an individual file.

js/embedded/main.js

@@ -48,7 +48,7 @@
 				OCA.Music.fileShareView = new OCA.Music.FileShareView(mPlayer, mAudioMimes);
 			} else {
 				// Files app or a link shared folder
-				if (OCA.Files.fileActions) {
+				if (OCA.Files?.fileActions) {
 					OCA.Music.folderView.registerToFileActions(OCA.Files.fileActions);
 				}
 				OCA.Music.initPlaylistTabView(mPlaylistMimes);

lib/AppInfo/Application.php

@@ -794,13 +794,21 @@ private function registerHooks() {
 	}
 
 	private function registerEmbeddedPlayer() {
-		$loadEmbeddedMusicPlayer = function() {
+		$dispatcher = $this->getContainer()->query(\OCP\EventDispatcher\IEventDispatcher::class);
+
+		// Files app
+		$dispatcher->addListener(\OCA\Files\Event\LoadAdditionalScriptsEvent::class, function() {
 			$this->loadEmbeddedMusicPlayer();
-		};
+		});
 
-		$dispatcher = $this->getContainer()->query(\OCP\EventDispatcher\IEventDispatcher::class);
-		$dispatcher->addListener(\OCA\Files\Event\LoadAdditionalScriptsEvent::class, $loadEmbeddedMusicPlayer);
-		$dispatcher->addListener(\OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent::class, $loadEmbeddedMusicPlayer);
+		// Files_Sharing app
+		$dispatcher->addListener(\OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent::class, function(\OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent $event) {
+			// don't load the embedded player on the authentication page of password-protected share, and only load it for shared folders (not individual files)
+			if ($event->getScope() != \OCA\Files_Sharing\Event\BeforeTemplateRenderedEvent::SCOPE_PUBLIC_SHARE_AUTH
+					&& $event->getShare()->getNodeType() == 'folder') {
+				$this->loadEmbeddedMusicPlayer();
+			}
+		});
 	}
 
 	/**