add feature autostop

mumbleBot.py

@@ -149,6 +149,10 @@ class MumbleBot:
                                                self.ducking_sound_received)
             self.mumble.set_receive_sound(True)
 
+        if not var.db.has_option("bot", "auto_stop") and var.config.getboolean("bot", "auto_stop", fallback=False)\
+                or var.config.getboolean("bot", "auto_stop"):
+            self.mumble.callbacks.set_callback(pymumble.constants.PYMUMBLE_CLBK_USERREMOVED, self.users_changed)
+            self.mumble.callbacks.set_callback(pymumble.constants.PYMUMBLE_CLBK_USERUPDATED, self.users_changed)
         # Debug use
         self._loop_status = 'Idle'
         self._display_rms = False
@@ -314,6 +318,17 @@ class MumbleBot:
         else:
             return False
 
+    # =======================
+    #         Users changed
+    # =======================
+
+    def users_changed(self, user, message):
+        own_channel = self.mumble.channels[self.mumble.users.myself['channel_id']]
+        # if the bot is the only user left in the channel
+        if len(own_channel.get_users()) == 1: 
+            self.log.info('Other users in the channel left. Stopping music now.')
+            self.clear()
+
     # =======================
     #   Launch and Download
     # =======================