Add an autosave feature. State can saved frequently

mopidy_autoplay/__init__.py

@@ -92,6 +92,11 @@ def get_config_schema(self):
         # mute = True|False|"auto")
         schema['mixer.mute'] = AutoValue(config.Boolean)
 
+        # Save state on events 
+        schema['autosave_events'] = AutoValue(config.List,optional=True)
+        schema['autosave_min_interval']	= AutoValue(
+            config.Integer, minimum=10)	
+
         return schema
 
     def setup(self, registry):

mopidy_autoplay/ext.conf

@@ -21,3 +21,8 @@ playback.time_position = auto
 # Mixer (volume = [0..100]; mute = on|off|true|false)
 mixer.volume = auto
 mixer.mute = auto
+
+# Auto safe on events. See https://docs.mopidy.com/en/latest/api/core/#core-events for possible events
+# autosave_events = track_playback_started
+autosave_events =
+autosave_min_interval = 60

mopidy_autoplay/frontend.py

@@ -9,7 +9,7 @@
 import glob
 import json
 import pykka
-
+import time
 from mopidy import core
 from . import Extension, Recollection
 
@@ -36,14 +36,15 @@ def __init__(self, config, core):
         logger.debug(
             "Use '%s' as statefile.",
             self.statefile)
-
+        self._last_autosave = time.time()
     # The frontend implementation
 
     def on_start(self):                                         # noqa: D401
         """Called, when the extension is started."""
         logger.debug("on_start()")
 
         state = self.read_state(self.statefile)
+
         if state:
             self.restore_state(state)
 
@@ -54,8 +55,18 @@ def on_stop(self):                                          # noqa: D401
         state = self.store_state()
         self.write_state(state, self.statefile)
 
-    # Helper functions
-
+    def on_event(self, event, **kwargs):
+        logger.debug("Event %s args: %s",event,str(kwargs))
+        if event in self.config['autosave_events']:
+            now = time.time()
+            if (now - self._last_autosave) < self.config['autosave_min_interval']:
+                logger.info("Skip autosave")
+            else:
+                logger.info("Autosave ({0})".format(event))
+                state = self.store_state()
+                self.write_state(state, self.statefile)    
+                self._last_autosave = now  
+
     def _get_config(self, state, controller, option):
         """
         Return the configuration from `config` and `state`.