Be smart when wiping Kodi DBs: only wipe music if necessary

resources/lib/kodidb_functions.py

@@ -1298,7 +1298,7 @@ def reset_cached_images():
                 kodi_db.cursor.execute("DELETE FROM %s" % row[0])
 
 
-def wipe_dbs():
+def wipe_dbs(music=True):
     """
     Completely resets the Kodi databases 'video', 'texture' and 'music' (if
     music sync is enabled)
@@ -1306,8 +1306,7 @@ def wipe_dbs():
     LOG.warn('Wiping Kodi databases!')
     query = "SELECT name FROM sqlite_master WHERE type = 'table'"
     kinds = ['video', 'texture']
-    if utils.settings('enableMusic') == 'true':
-        LOG.info('Also deleting music database')
+    if music:
         kinds.append('music')
     for db in kinds:
         with GetKodiDB(db) as kodi_db:

resources/lib/plex_db/music.py

@@ -235,3 +235,11 @@ class Music(object):
         self.cursor.execute('SELECT * FROM album WHERE artist_id = ?',
                             (plex_id, ))
         return (self.entry_to_album(x) for x in self.cursor)
+
+    def songs_have_been_synced(self):
+        """
+        Returns True if at least one song has been synced - indicating that
+        Plex Music sync has been active at some point
+        """
+        self.cursor.execute('SELECT plex_id FROM track LIMIT 1')
+        return self.cursor.fetchone() is not None

resources/lib/utils.py

@@ -523,21 +523,27 @@ def wipe_database():
     # Clean up the video nodes
     delete_nodes()
     from . import kodidb_functions
-    kodidb_functions.wipe_dbs()
     from . import plex_db
     # First get the paths to all synced playlists
     playlist_paths = []
     with plex_db.PlexDB() as plexdb:
+        if plexdb.songs_have_been_synced():
+            LOG.info('Detected that music has also been synced - wiping music')
+            music = True
+        else:
+            LOG.info('No music has been synced in the past - not wiping')
+            music = False
         plexdb.cursor.execute('SELECT kodi_path FROM playlists')
         for entry in plexdb.cursor:
             playlist_paths.append(entry[0])
+    kodidb_functions.wipe_dbs(music)
     plex_db.wipe()
     plex_db.initialize()
     # Delete all synced playlists
     for path in playlist_paths:
         try:
             path_ops.remove(path)
-            LOG.info('Removed playlist %s', path)
+            LOG.debug('Removed playlist %s', path)
         except (OSError, IOError):
             LOG.warn('Could not remove playlist %s', path)