Title message improved - preload

spotify.py

                                # We pipe the output to an internal pipe
                                stderr=subprocess.PIPE)
         self.__state__ = None
+        self.__preload_state__ = False
         self.__title__ = None
         self.__spot_id__ = None
+        self.__spot_id_preload__ = None
         self.set_state(False)
         self.set_title("")
 
             if output:
                 out_txt = output.decode('utf-8').strip('\n').strip()
                 out_txt = out_txt[out_txt.find(']') + 2:]
-                logger.debug("librespot output: %s", out_txt)
+                #logger.debug("librespot output: %s", out_txt)
                 # TODO: Parse for "librespot output: Loading <Here Ever After> with Spotify URI <spotify:track:0zckHMfaB6vT5o23ZVBLHJ>"
                 if out_txt.lower().startswith("loading"):
-                    self.__spot_id__ = out_txt.split("<")[2][:-1]
-                    logger.info("Track-ID %s identified", self.__spot_id__)
-                    if self.__state__:
-                        self.set_title(self.get_title_by_id())
+                    logger.debug("librespot: %s", out_txt)
+                    if self.__preload_state__:
+                        self.__spot_id_preload__ = out_txt.split("<")[2][:-1]
+                        logger.info("Upcomming Track-ID %s identified", self.__spot_id__)
                     else:
-                        self.set_title("")
+                        self.__spot_id__ = out_txt.split("<")[2][:-1]
+                        logger.info("Current Track-ID %s identified", self.__spot_id__)
                 if "command=" in out_txt:
                     command = out_txt[out_txt.find('command=') + 8:].strip().lower()
                     logger.debug("librespot command: %s", command)
+                    if command.startswith("preload"):
+                        self.__preload_state__ = True
                     if command.startswith("load"):
                         self.set_state(command.split(',')[2].strip() == 'true')
+                        #
+                        self.__preload_state__ = False
+                        self.__spot_id__ = self.__spot_id_preload__
                     #
-                    if command in self.ON_CMD:
+                    elif command in self.ON_CMD:
                         self.set_state(True)
-                    if command in self.OFF_CMD:
+                    elif command in self.OFF_CMD:
                         self.set_state(False)
-                    if self.__state__:
-                        self.set_title(self.get_title_by_id())
-                    else:
-                        self.set_title("")
+                if self.__state__:
+                    self.set_title(self.get_title_by_id())
+                else:
+                    self.set_title("")
+
 
     def get_title_by_id(self):
         if self.__spot_id__ is None: