Add each fronius sensor as own template (#25608)

* Fix formatting in history test

* Add each sensor as own template

* Make adapters non-entities

* Externalize and organize data fetching, improve system view

* Small fixes

Rename fetching adapters to adapters
throw away non-working system overviews
slightly change naming
remove scan_interval from schema
formatting

* Scan interval is already timedelta and unnecessary return

* Formatting

* Ensure better codestyle by storing cell variables explicitely in different places

homeassistant/components/fronius/sensor.py

@@ -1,5 +1,6 @@
 """Support for Fronius devices."""
 import copy
+from datetime import timedelta
 import logging
 import voluptuous as vol
 
@@ -11,10 +12,13 @@ from homeassistant.const import (
     CONF_SENSOR_TYPE,
     CONF_DEVICE,
     CONF_MONITORED_CONDITIONS,
+    CONF_SCAN_INTERVAL,
 )
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
+from homeassistant.helpers.event import async_track_time_interval
+
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -30,6 +34,7 @@ SCOPE_SYSTEM = "system"
 DEFAULT_SCOPE = SCOPE_DEVICE
 DEFAULT_DEVICE = 0
 DEFAULT_INVERTER = 1
+DEFAULT_SCAN_INTERVAL = timedelta(seconds=60)
 
 SENSOR_TYPES = [TYPE_INVERTER, TYPE_STORAGE, TYPE_METER, TYPE_POWER_FLOW]
 SCOPE_TYPES = [SCOPE_DEVICE, SCOPE_SYSTEM]
@@ -78,47 +83,64 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     session = async_get_clientsession(hass)
     fronius = Fronius(session, config[CONF_RESOURCE])
 
-    sensors = []
+    scan_interval = config.get(CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL)
+    adapters = []
+    # Creates all adapters for monitored conditions
     for condition in config[CONF_MONITORED_CONDITIONS]:
 
         device = condition[CONF_DEVICE]
-        name = "Fronius {} {} {}".format(
-            condition[CONF_SENSOR_TYPE].replace("_", " ").capitalize(),
-            device,
-            config[CONF_RESOURCE],
-        )
         sensor_type = condition[CONF_SENSOR_TYPE]
         scope = condition[CONF_SCOPE]
+        name = "Fronius {} {} {}".format(
+            condition[CONF_SENSOR_TYPE].replace("_", " ").capitalize(),
+            device if scope == SCOPE_DEVICE else SCOPE_SYSTEM,
+            config[CONF_RESOURCE],
+        )
         if sensor_type == TYPE_INVERTER:
             if scope == SCOPE_SYSTEM:
-                sensor_cls = FroniusInverterSystem
+                adapter_cls = FroniusInverterSystem
             else:
-                sensor_cls = FroniusInverterDevice
+                adapter_cls = FroniusInverterDevice
         elif sensor_type == TYPE_METER:
             if scope == SCOPE_SYSTEM:
-                sensor_cls = FroniusMeterSystem
+                adapter_cls = FroniusMeterSystem
             else:
-                sensor_cls = FroniusMeterDevice
+                adapter_cls = FroniusMeterDevice
         elif sensor_type == TYPE_POWER_FLOW:
-            sensor_cls = FroniusPowerFlow
+            adapter_cls = FroniusPowerFlow
         else:
-            sensor_cls = FroniusStorage
+            adapter_cls = FroniusStorage
 
-        sensors.append(sensor_cls(fronius, name, device))
+        adapters.append(adapter_cls(fronius, name, device, async_add_entities))
 
-    async_add_entities(sensors, True)
+    # Creates a lamdba that fetches an update when called
+    def adapter_data_fetcher(data_adapter):
+        async def fetch_data(*_):
+            await data_adapter.async_update()
+
+        return fetch_data
+
+    # Set up the fetching in a fixed interval for each adapter
+    for adapter in adapters:
+        fetch = adapter_data_fetcher(adapter)
+        # fetch data once at set-up
+        await fetch()
+        async_track_time_interval(hass, fetch, scan_interval)
 
 
-class FroniusSensor(Entity):
-    """The Fronius sensor implementation."""
+class FroniusAdapter:
+    """The Fronius sensor fetching component."""
 
-    def __init__(self, data, name, device):
+    def __init__(self, bridge, name, device, add_entities):
         """Initialize the sensor."""
-        self.data = data
+        self.bridge = bridge
         self._name = name
         self._device = device
-        self._state = None
-        self._attributes = {}
+        self._fetched = {}
+
+        self.sensors = set()
+        self._registered_sensors = set()
+        self._add_entities = add_entities
 
     @property
     def name(self):
@@ -126,14 +148,9 @@ class FroniusSensor(Entity):
         return self._name
 
     @property
-    def state(self):
-        """Return the current state."""
-        return self._state
-
-    @property
-    def device_state_attributes(self):
+    def data(self):
         """Return the state attributes."""
-        return self._attributes
+        return self._fetched
 
     async def async_update(self):
         """Retrieve and update latest state."""
@@ -148,62 +165,129 @@ class FroniusSensor(Entity):
                 "Maybe the configured device is not supported"
             )
 
-        if values:
-            self._state = values["status"]["Code"]
-            attributes = {}
-            for key in values:
-                if "value" in values[key]:
-                    attributes[key] = values[key].get("value", 0)
-            self._attributes = attributes
+        if not values:
+            return
+        attributes = self._fetched
+        # Copy data of current fronius device
+        for key, entry in values.items():
+            # If the data is directly a sensor
+            if "value" in entry:
+                attributes[key] = entry
+        self._fetched = attributes
+
+        # Add discovered value fields as sensors
+        # because some fields are only sent temporarily
+        new_sensors = []
+        for key in attributes:
+            if key not in self.sensors:
+                self.sensors.add(key)
+                _LOGGER.info("Discovered %s, adding as sensor", key)
+                new_sensors.append(FroniusTemplateSensor(self, key))
+        self._add_entities(new_sensors, True)
+
+        # Schedule an update for all included sensors
+        for sensor in self._registered_sensors:
+            sensor.async_schedule_update_ha_state(True)
 
     async def _update(self):
         """Return values of interest."""
         pass
 
+    async def register(self, sensor):
+        """Register child sensor for update subscriptions."""
+        self._registered_sensors.add(sensor)
 
-class FroniusInverterSystem(FroniusSensor):
-    """Sensor for the fronius inverter with system scope."""
+
+class FroniusInverterSystem(FroniusAdapter):
+    """Adapter for the fronius inverter with system scope."""
 
     async def _update(self):
         """Get the values for the current state."""
-        return await self.data.current_system_inverter_data()
+        return await self.bridge.current_system_inverter_data()
 
 
-class FroniusInverterDevice(FroniusSensor):
-    """Sensor for the fronius inverter with device scope."""
+class FroniusInverterDevice(FroniusAdapter):
+    """Adapter for the fronius inverter with device scope."""
 
     async def _update(self):
         """Get the values for the current state."""
-        return await self.data.current_inverter_data(self._device)
+        return await self.bridge.current_inverter_data(self._device)
 
 
-class FroniusStorage(FroniusSensor):
-    """Sensor for the fronius battery storage."""
+class FroniusStorage(FroniusAdapter):
+    """Adapter for the fronius battery storage."""
 
     async def _update(self):
         """Get the values for the current state."""
-        return await self.data.current_storage_data(self._device)
+        return await self.bridge.current_storage_data(self._device)
 
 
-class FroniusMeterSystem(FroniusSensor):
-    """Sensor for the fronius meter with system scope."""
+class FroniusMeterSystem(FroniusAdapter):
+    """Adapter for the fronius meter with system scope."""
 
     async def _update(self):
         """Get the values for the current state."""
-        return await self.data.current_system_meter_data()
+        return await self.bridge.current_system_meter_data()
 
 
-class FroniusMeterDevice(FroniusSensor):
-    """Sensor for the fronius meter with device scope."""
+class FroniusMeterDevice(FroniusAdapter):
+    """Adapter for the fronius meter with device scope."""
 
     async def _update(self):
         """Get the values for the current state."""
-        return await self.data.current_meter_data(self._device)
+        return await self.bridge.current_meter_data(self._device)
 
 
-class FroniusPowerFlow(FroniusSensor):
-    """Sensor for the fronius power flow."""
+class FroniusPowerFlow(FroniusAdapter):
+    """Adapter for the fronius power flow."""
 
     async def _update(self):
         """Get the values for the current state."""
-        return await self.data.current_power_flow()
+        return await self.bridge.current_power_flow()
+
+
+class FroniusTemplateSensor(Entity):
+    """Sensor for the single values (e.g. pv power, ac power)."""
+
+    def __init__(self, parent: FroniusAdapter, name):
+        """Initialize a singular value sensor."""
+        self._name = name
+        self.parent = parent
+        self._state = None
+        self._unit = None
+
+    @property
+    def name(self):
+        """Return the name of the sensor."""
+        return "{} {}".format(
+            self._name.replace("_", " ").capitalize(), self.parent.name
+        )
+
+    @property
+    def state(self):
+        """Return the current state."""
+        return self._state
+
+    @property
+    def unit_of_measurement(self):
+        """Return the unit of measurement."""
+        return self._unit
+
+    @property
+    def should_poll(self):
+        """Device should not be polled, returns False."""
+        return False
+
+    async def async_update(self):
+        """Update the internal state."""
+        state = self.parent.data.get(self._name)
+        self._state = state.get("value")
+        self._unit = state.get("unit")
+
+    async def async_added_to_hass(self):
+        """Register at parent component for updates."""
+        await self.parent.register(self)
+
+    def __hash__(self):
+        """Hash sensor by hashing its name."""
+        return hash(self.name)