firmware: Dont send MQTT messages if only .since attribute changes

Can happen when pressing openbutton inside/outside for a long time

firmware/dlockoslo.py

@@ -298,6 +298,26 @@ def process(self, inport, msg):
         self.send('error', 'Unknown port {}'.format(inport))
     self.ack(msg)
 
+def is_state_change(current, next):
+
+    # avoid modifying inputs
+    current = copy.deepcopy(current)
+    next = copy.deepcopy(next)
+
+    # ignore changes that are only metadata
+    current.lock.since = None
+    next.lock.since = None
+    current.lock.until = None
+    next.lock.until = None
+    current.opener.since = None
+    next.opener.since = None
+    current.opener.until = None
+    next.opener.until = None
+
+    state_changed = repr(next.__dict__) != repr(current.__dict__)
+    return state_changed
+
+
 class LockParticipant(msgflo.Participant):
   def __init__(self, role):
     d = copy.deepcopy(participant_definition)
@@ -372,7 +392,7 @@ def recalculate_state(self, mqtt_request=None):
     next = next_state(self.state, Inputs(**inputs))
     set_outputs(self.state, self.output_files)
 
-    state_changed = next.__dict__ != self.state.__dict__
+    state_changed = is_state_change(self.state, next)
     if state_changed:
         entry = { 'inputs': inputs, 'state': next.__dict__ }
         log.info(entry)

firmware/test_doorsystem.py

@@ -247,4 +247,36 @@ def test_bolt_present_periodic_update(bolt_present):
     assert states.bolt_present_updated > last_updated, 'should update'
     assert states.bolt_present_updated == 90.0
 
+def test_state_change_identity():
+    states = dlockoslo.States()
+    change = dlockoslo.is_state_change(states, states)
+    assert change == False
+
+def test_state_change_equivalence():
+    state1 = dlockoslo.States()
+    state2 = dlockoslo.States()
+    change = dlockoslo.is_state_change(state1, state2)
+    assert change == False
+
+def test_state_change_only_since_until():
+    state1 = dlockoslo.States()
+    state2 = dlockoslo.States()
+    print(id(state1), id(state2))
+    state2.opener.since = 100
+    state2.opener.until = 110
+    state2.opener.since = 100
+    state2.opener.until = 110
+
+    change = dlockoslo.is_state_change(state1, state2)
+    assert change == False, '.since and .until should be ignored'
+
+def test_state_change_unlocking():
+    state1 = dlockoslo.States()
+    state1.lock = dlockoslo.Locked(since=10)
+    state2 = dlockoslo.States()
+    state2.lock = dlockoslo.Unlocked(since=20)
+
+    change = dlockoslo.is_state_change(state1, state2)
+    assert change == True, 'unlocking is state change'
+