New sensor domain expiry

.coveragerc

@@ -574,6 +574,7 @@ omit =
     homeassistant/components/sensor/discogs.py
     homeassistant/components/sensor/dnsip.py
     homeassistant/components/sensor/dovado.py
+    homeassistant/components/sensor/domain_expiry.py
     homeassistant/components/sensor/dte_energy_bridge.py
     homeassistant/components/sensor/dublin_bus_transport.py
     homeassistant/components/sensor/dwd_weather_warnings.py

homeassistant/components/sensor/domain_expiry.py

@@ -0,0 +1,76 @@
+"""
+Counter for the days till domain will expire.
+
+For more details about this sensor please refer to the documentation at
+https://home-assistant.io/components/sensor.domain_expiry/
+"""
+import logging
+from datetime import datetime, timedelta
+
+import voluptuous as vol
+
+import homeassistant.helpers.config_validation as cv
+from homeassistant.components.sensor import PLATFORM_SCHEMA
+from homeassistant.const import (CONF_NAME, CONF_HOST)
+from homeassistant.helpers.entity import Entity
+
+REQUIREMENTS = ['python-whois==0.6.9']
+
+_LOGGER = logging.getLogger(__name__)
+
+DEFAULT_NAME = 'Domain Expiry'
+
+SCAN_INTERVAL = timedelta(hours=24)
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    vol.Required(CONF_HOST): cv.string,
+    vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string
+})
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Set up domain expiry sensor."""
+    server_name = config.get(CONF_HOST)
+    sensor_name = config.get(CONF_NAME)
+
+    add_devices([DomainExpiry(sensor_name, server_name)], True)
+
+
+class DomainExpiry(Entity):
+    """Implementation of the domain expiry sensor."""
+
+    def __init__(self, sensor_name, server_name):
+        """Initialize the sensor."""
+        self.server_name = server_name
+        self._name = sensor_name
+        self._state = None
+
+    @property
+    def name(self):
+        """Return the name of the sensor."""
+        return self._name
+
+    @property
+    def unit_of_measurement(self):
+        """Return the unit this state is expressed in."""
+        return 'days'
+
+    @property
+    def state(self):
+        """Return the state of the sensor."""
+        return self._state
+
+    @property
+    def icon(self):
+        """Icon to use in the frontend, if any."""
+        return 'mdi:earth'
+
+    def update(self):
+        """Fetch the domain information."""
+        import whois
+        domain = whois.whois(self.server_name)
+        if isinstance(domain.expiration_date, datetime):
+            expiry = domain.expiration_date - datetime.today()
+            self._state = expiry.days
+        else:
+            _LOGGER.error("Cannot get expiry date for %s", self.server_name)

requirements_all.txt

@@ -1035,6 +1035,9 @@ python-velbus==2.0.11
 # homeassistant.components.media_player.vlc
 python-vlc==1.1.2
 
+# homeassistant.components.sensor.domain_expiry
+python-whois==0.6.9
+
 # homeassistant.components.wink
 python-wink==1.7.3