fix: prevent Play Next restart after manual play

src/components/PlayNextView/PlayNextController.ts

@@ -8,23 +8,37 @@ import { wantPlay } from '$lib/wantPlay';
 
 import { get } from 'svelte/store';
 
+let playNextListEmpty = true;
+
+playNextList.subscribe((list) => {
+    if (playNextListEmpty) loadNext(true);
+
+    playNextListEmpty = list.length === 0;
+});
 
 ended.subscribe((isEnded) => {
     if (!isEnded) return;
 
+    loadNext();
+});
+
+function loadNext(manual = false) {
     const wasPlayingID = get(currentID);
 
     // find the index of the current playing song
     const index = get(playNextList).findIndex((item) => {
         return item.id === wasPlayingID;
     });
 
+    // if index is -1, the song is not in the playNextList
+    if (index === -1 && !manual) return;
+
     // if the index is the last index, it means the song is the last song
     if (index === get(playNextList).length - 1) return;
 
     // play the next song
     wantPlay(get(playNextList)[index + 1]);
-});
+}
 
 if ('mediaSession' in navigator) {
     navigator.mediaSession.setActionHandler('previoustrack', () => {