Tesla bug fixes. (#9774)

* Tesla bug fixes.

* Added myself to CODEOWNERS for tesla.

homeassistant/components/switch/tesla.py

@@ -0,0 +1,53 @@
+"""
+Support for Tesla charger switch.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/switch.tesla/
+"""
+import logging
+
+from homeassistant.components.switch import ENTITY_ID_FORMAT, SwitchDevice
+from homeassistant.components.tesla import DOMAIN as TESLA_DOMAIN, TeslaDevice
+from homeassistant.const import STATE_ON, STATE_OFF
+
+_LOGGER = logging.getLogger(__name__)
+DEPENDENCIES = ['tesla']
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Set up the Tesla switch platform."""
+    devices = [ChargerSwitch(device, hass.data[TESLA_DOMAIN]['controller'])
+               for device in hass.data[TESLA_DOMAIN]['devices']['switch']]
+    add_devices(devices, True)
+
+
+class ChargerSwitch(TeslaDevice, SwitchDevice):
+    """Representation of a Tesla charger switch."""
+
+    def __init__(self, tesla_device, controller):
+        """Initialisation of the switch."""
+        self._state = None
+        super().__init__(tesla_device, controller)
+        self.entity_id = ENTITY_ID_FORMAT.format(self.tesla_id)
+
+    def turn_on(self, **kwargs):
+        """Send the on command."""
+        _LOGGER.debug("Enable charging: %s", self._name)
+        self.tesla_device.start_charge()
+
+    def turn_off(self, **kwargs):
+        """Send the off command."""
+        _LOGGER.debug("Disable charging  for: %s", self._name)
+        self.tesla_device.stop_charge()
+
+    @property
+    def is_on(self):
+        """Get whether the switch is in on state."""
+        return self._state == STATE_ON
+
+    def update(self):
+        """Updating state of the switch."""
+        _LOGGER.debug("Updating state for: %s", self._name)
+        self.tesla_device.update()
+        self._state = STATE_ON if self.tesla_device.is_charging() \
+            else STATE_OFF