dweet fix again

app/controller/state/changer.py

@@ -0,0 +1,69 @@
+import RPi.GPIO as GPIO
+import config
+
+class Changer(object):
+
+    def __init__(self, local_state, remote_state):
+        self.local_state = local_state
+        self.remote_state = remote_state
+        GPIO.setmode(GPIO.BCM) # Broadcom pin-numbering scheme
+        GPIO.setup(config.GPIO_PIN_OUT_VALVE, GPIO.OUT)
+        GPIO.setup(config.GPIO_PIN_IN_VALVE, GPIO.OUT)
+
+        self.out_valve_states = {
+            'opening': self.open_out_valve,
+            'closing': self.close_out_valve,
+            'open': self.open_out_valve,
+            'closed': self.close_out_valve
+        }
+
+        self.in_valve_states = {
+            'opening': self.open_in_valve,
+            'closing': self.close_in_valve,
+            'open': self.open_in_valve,
+            'closed': self.close_in_valve
+        }
+
+    def stop_everything(self):
+        self.close_in_valve()
+        self.close_out_valve()
+
+    def safe_remote_state(self, key):
+        if key in ['out_valve', 'in_valve']:
+            return self.remote_state.get(key, 'closed')
+        else:
+            return self.remote_state.get(key,'');
+
+    def process_change(self):
+        self.validate_states()
+
+        out_valve_change = self.out_valve_states.get(self.safe_remote_state('out_valve'), None )
+        if out_valve_change is not None:
+            out_valve_change()
+
+        in_valve_change = self.in_valve_states.get(self.safe_remote_state('in_valve'), None )
+        if in_valve_change is not None:
+            in_valve_change()
+
+        return self.local_state
+
+    def open_in_valve(self):
+        GPIO.output(config.GPIO_PIN_IN_VALVE, GPIO.HIGH)
+        self.local_state['in_valve'] = 'open'
+
+    def close_in_valve(self):
+        GPIO.output(config.GPIO_PIN_IN_VALVE, GPIO.LOW)
+        self.local_state['in_valve'] = 'closed'
+
+    def open_out_valve(self):
+        GPIO.output(config.GPIO_PIN_OUT_VALVE, GPIO.HIGH)
+        self.local_state['out_valve'] = 'open'
+
+    def close_out_valve(self):
+        GPIO.output(config.GPIO_PIN_OUT_VALVE, GPIO.LOW)
+        self.local_state['out_valve'] = 'closed'
+
+    def validate_states(self):
+        if self.local_state is None or self.remote_state is None:
+            raise ClassNotReadyException("Both local and remote states must be present!")
+        # TODO: add detailed validation