Add gps settings/initialization to scos-sensor

env.template

@@ -78,6 +78,9 @@ SECRET_KEY="$(python3 -c 'import secrets; print(secrets.token_urlsafe(64))')"
 SIGAN_CLASS=TekRSASigan
 SIGAN_MODULE=scos_tekrsa.hardware.tekrsa_sigan
 
+GPS_CLASS=MockGPS
+GPS_MODULE=scos_action.hardware.mocks.mock_gps
+
 # SECURITY WARNING: You should be using certs from a trusted authority.
 #                   If you don't have any, try letsencrypt or a similar service.
 # Provide the absolute path to your ssl certificate and key

src/initialization/sensor_loader.py

@@ -88,16 +88,47 @@ def load_sensor(sensor_capabilities: dict) -> Sensor:
     except Exception as ex:
         logger.warning(f"unable to create signal analyzer: {ex}")
 
+    gps = None
+    try:
+        if not settings.RUNNING_MIGRATIONS:
+            check_for_required_gps_settings()
+            gps_module_setting = settings.GPS_MODULE
+            gps_module = importlib.import_module(gps_module_setting)
+            logger.info(
+                "Creating " + settings.GPS_CLASS + " from " + settings.GPS_MODULE
+            )
+            gps_constructor = getattr(gps_module, settings.GPS_CLASS)
+            gps = gps_constructor()
+            register_component_with_status.send(gps, component=gps)
+        else:
+            logger.info("Running migrations. Not loading GPS.")
+    except Exception as ex:
+        logger.warning(f"unable to create GPS: {ex}")
+
     sensor = Sensor(
         signal_analyzer=sigan,
         capabilities=sensor_capabilities,
         preselector=preselector,
         switches=switches,
         location=location,
+        gps=gps,
     )
     return sensor
 
 
+def check_for_required_gps_settings():
+    error = ""
+    raise_exception = False
+    if settings.GPS_MODULE is None:
+        raise_exception = True
+        error = "GPS_MODULE environment variable must be set. "
+    if settings.GPS_CLASS is None:
+        raise_exception = True
+        error += "GPS_CLASS environment variable. "
+    if raise_exception:
+        raise Exception(error)
+
+
 def check_for_required_sigan_settings():
     error = ""
     raise_exception = False