Fix Plex trailers screwing up playqueue

- Introduce a flag to check whether PKC itself made changes to the playqueue

resources/lib/playback.py

@@ -165,6 +165,8 @@ def _playback_init(plex_id, plex_type, playqueue, pos):
     # plugin://pkc will be lost; Kodi will try to startup playback for an empty
     # path: log entry is "CGUIWindowVideoBase::OnPlayMedia <missing path>"
     thread.start()
+    # Ensure that PKC playqueue monitor ignores the changes we just made
+    playqueue.pkc_edit = True
 
 
 def _ensure_resolve(abort=False):

resources/lib/playlist_func.py

@@ -49,6 +49,9 @@ class PlaylistObjectBaseclase(object):
         self.plex_transient_token = None
         # Need a hack for detecting swaps of elements
         self.old_kodi_pl = []
+        # Did PKC itself just change the playqueue so the PKC playqueue monitor
+        # should not pick up any changes?
+        self.pkc_edit = False
         # Workaround to avoid endless loops of detecting PL clears
         self._clear_list = []
 

resources/lib/playqueue.py

@@ -234,6 +234,9 @@ class PlayqueueMonitor(Thread):
                         # Only initialize if directly fired up using direct
                         # paths. Otherwise let default.py do its magic
                         LOG.debug('Not yet initiating playback')
+                    elif playqueue.pkc_edit:
+                        playqueue.pkc_edit = False
+                        LOG.debug('PKC just edited the playqueue - skipping')
                     else:
                         # compare old and new playqueue
                         self._compare_playqueues(playqueue, kodi_pl)