playing queue improvements

app/src/main/java/com/github/libretube/sheets/VideoOptionsBottomSheet.kt

@@ -89,6 +89,9 @@ class VideoOptionsBottomSheet(
                     // using parentFragmentManager is important here
                     shareDialog.show(parentFragmentManager, ShareDialog::class.java.name)
                 }
+                context?.getString(R.string.play_next) -> {
+                    PlayingQueue.playNext(videoId)
+                }
                 context?.getString(R.string.add_to_queue) -> {
                     PlayingQueue.add(videoId)
                 }

app/src/main/java/com/github/libretube/util/PlayingQueue.kt

@@ -2,6 +2,7 @@ package com.github.libretube.util
 
 object PlayingQueue {
     val queue = mutableListOf<String>()
+    val currentVideoId: String? = null
 
     fun clear() {
         queue.clear()
@@ -11,10 +12,16 @@ object PlayingQueue {
         queue.add(videoId)
     }
 
-    fun playNext(currentVideoId: String, nextVideoId: String) {
+    fun playNext(nextVideoId: String) {
         queue.add(
             queue.indexOf(currentVideoId),
             nextVideoId
         )
     }
+
+    fun getNext(): String? {
+        val currentIndex = queue.indexOf(currentVideoId)
+        return if (currentIndex > queue.size) null
+        else queue[currentIndex + 1]
+    }
 }

app/src/main/res/values/strings.xml

@@ -329,6 +329,7 @@
     <string name="backup_customInstances">Custom Instances</string>
     <string name="save_feed">Load feed in background</string>
     <string name="save_feed_summary">Load the subscription feed in the background and prevent it from being auto-refreshed.</string>
+    <string name="play_next">Play next</string>
 
     <!-- Notification channel strings -->
     <string name="download_channel_name">Download Service</string>