fix repeating videos

app/src/main/java/com/github/libretube/fragments/PlayerFragment.kt

@@ -577,8 +577,6 @@ class PlayerFragment : BaseFragment() {
         playerBinding.fullscreen.setImageResource(R.drawable.ic_fullscreen_exit)
         playerBinding.exoTitle.visibility = View.VISIBLE
 
-        scaleControls(1.3F)
-
         val mainActivity = activity as MainActivity
         if (!autoRotationEnabled) {
             // different orientations of the video are only available when auto rotation is disabled
@@ -613,8 +611,6 @@ class PlayerFragment : BaseFragment() {
         playerBinding.fullscreen.setImageResource(R.drawable.ic_fullscreen)
         playerBinding.exoTitle.visibility = View.INVISIBLE
 
-        scaleControls(1F)
-
         if (!autoRotationEnabled) {
             // switch back to portrait mode if auto rotation disabled
             val mainActivity = activity as MainActivity
@@ -624,11 +620,6 @@ class PlayerFragment : BaseFragment() {
         Globals.IS_FULL_SCREEN = false
     }
 
-    private fun scaleControls(scaleFactor: Float) {
-        playerBinding.exoPlayPause.scaleX = scaleFactor
-        playerBinding.exoPlayPause.scaleY = scaleFactor
-    }
-
     private fun toggleDescription() {
         if (binding.descLinLayout.isVisible) {
             // hide the description and chapters
@@ -766,7 +757,18 @@ class PlayerFragment : BaseFragment() {
      * set the videoId of the next stream for autoplay
      */
     private fun setNextStream() {
-        nextStreamId = streams.relatedStreams!![0].url.toID()
+        // don't play a video if it got played before already
+        var index = 0
+        while (nextStreamId == null || nextStreamId == videoId!! ||
+            (
+                videoIds.contains(nextStreamId) &&
+                    videoIds.indexOf(videoId) > videoIds.indexOf(nextStreamId)
+                )
+        ) {
+            nextStreamId = streams.relatedStreams!![index].url.toID()
+            if (index + 1 < streams.relatedStreams!!.size) index += 1
+            else break
+        }
         if (playlistId == null) return
         if (!this::autoPlayHelper.isInitialized) autoPlayHelper = AutoPlayHelper(playlistId!!)
         // search for the next videoId in the playlist
@@ -835,18 +837,17 @@ class PlayerFragment : BaseFragment() {
 
     // used for autoplay and skipping to next video
     private fun playNextVideo() {
+        if (nextStreamId == null) return
         // check whether there is a new video in the queue
         // by making sure that the next and the current video aren't the same
         saveWatchPosition()
         // forces the comments to reload for the new video
         commentsLoaded = false
         binding.commentsRecView.adapter = null
-        if (videoId != nextStreamId) {
         // save the id of the next stream as videoId and load the next video
         videoId = nextStreamId
         playVideo()
     }
-    }
 
     private fun prepareExoPlayerView() {
         exoPlayerView.apply {