added presence simulation interface

expressionparser.py

@@ -71,6 +71,7 @@ class EvaluateBase(object):
         if value == 'false': return False
         if value == False: return False
         if value == None: return False
+        if value == '': return False
         # this should be handle explicitely by the condition
         # edit: this is actually usefull if don't want disable to be evaluated as true
         if value == 'unavailable': return False

smartobject.py

@@ -135,6 +135,22 @@ class SmartObject(hass.Hass,LoggerInterface):
     # Called at the end of initialize() after all YAML args are processed.
     def on_initialize_smart_object(self): pass
 
+    # Presence simulation extension point.
+    # HomeAlarm can call this method by app name.
+    def start_presence_simulation(self, source_app=None, slot_name=None, payload=None):
+        self.log_error(
+            f"{self.name} does not implement start_presence_simulation "
+            f"(source_app={source_app}, slot_name={slot_name})"
+        )
+
+    # Presence simulation extension point.
+    # HomeAlarm can call this method by app name.
+    def stop_presence_simulation(self, source_app=None, slot_name=None, payload=None):
+        self.log_error(
+            f"{self.name} does not implement stop_presence_simulation "
+            f"(source_app={source_app}, slot_name={slot_name})"
+        )
+
     # ------------------------------------------------------------------
     # Dataset persistence helpers
     # ------------------------------------------------------------------