Add sensors and services to RainMachine (#14326)

* Starting to add attributes

* All attributes added to programs

* Basic zone attributes in place

* Added advanced properties for zones

* We shouldn't calculate the MAC with every entity

* Small fixes

* Basic framework for push in play

* I THINK IT'S WORKING

* Some state cleanup

* Restart

* Restart part 2

* Added stub for service schema

* Update

* Added services

* Small service description update

* Lint

* Updated CODEOWNERS

* Moving to async methods

* Fixed coverage test

* Lint

* Removed unnecessary hass reference

* Lint

* Lint

* Round 1 of Owner-requested changes

* Round 2 of Owner-requested changes

* Round 3 of Owner-requested changes

* Round 4 (final for now) of Owner-requested changes

* Hound

* Updated package requirements

* Lint

* Collaborator-requested changes

* Collaborator-requested changes

* More small tweaks

* One more small tweak

* Bumping Travis and Coveralls

homeassistant/components/sensor/rainmachine.py

@@ -0,0 +1,88 @@
+"""
+This platform provides support for sensor data from RainMachine.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/sensor.rainmachine/
+"""
+import logging
+
+from homeassistant.components.rainmachine import (
+    DATA_RAINMACHINE, DATA_UPDATE_TOPIC, SENSORS, RainMachineEntity)
+from homeassistant.const import CONF_MONITORED_CONDITIONS
+from homeassistant.core import callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
+
+DEPENDENCIES = ['rainmachine']
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Set up the RainMachine Switch platform."""
+    if discovery_info is None:
+        return
+
+    rainmachine = hass.data[DATA_RAINMACHINE]
+
+    sensors = []
+    for sensor_type in discovery_info[CONF_MONITORED_CONDITIONS]:
+        name, icon, unit = SENSORS[sensor_type]
+        sensors.append(
+            RainMachineSensor(rainmachine, sensor_type, name, icon, unit))
+
+    add_devices(sensors, True)
+
+
+class RainMachineSensor(RainMachineEntity):
+    """A sensor implementation for raincloud device."""
+
+    def __init__(self, rainmachine, sensor_type, name, icon, unit):
+        """Initialize."""
+        super().__init__(rainmachine)
+
+        self._icon = icon
+        self._name = name
+        self._sensor_type = sensor_type
+        self._state = None
+        self._unit = unit
+
+    @property
+    def icon(self) -> str:
+        """Return the icon."""
+        return self._icon
+
+    @property
+    def should_poll(self):
+        """Disable polling."""
+        return False
+
+    @property
+    def state(self) -> str:
+        """Return the name of the entity."""
+        return self._state
+
+    @property
+    def unique_id(self) -> str:
+        """Return a unique, HASS-friendly identifier for this entity."""
+        return '{0}_{1}'.format(
+            self.rainmachine.device_mac.replace(':', ''), self._sensor_type)
+
+    @property
+    def unit_of_measurement(self):
+        """Return the unit the value is expressed in."""
+        return self._unit
+
+    @callback
+    def update_data(self):
+        """Update the state."""
+        self.async_schedule_update_ha_state(True)
+
+    async def async_added_to_hass(self):
+        """Register callbacks."""
+        async_dispatcher_connect(self.hass, DATA_UPDATE_TOPIC,
+                                 self.update_data)
+
+    def update(self):
+        """Update the sensor's state."""
+        self._state = self.rainmachine.restrictions['global'][
+            'freezeProtectTemp']