Envisalink support (#2304)

* Created a new platform for envisalink-based alarm panels (Honeywell/DSC)

* Added a sensor component and cleanup

* Completed initial development.

* Fixing pylint issues.

* Fix more pylint issues

* Fixed more validation issues.

* Final pylint issues

* Final tweaks prior to PR.

* Fixed final pylint issue

* Resolved a few minor issues, and used volumptous for validation.

* Fixing final lint issues

* Fixes to validation schema and refactoring.

homeassistant/components/binary_sensor/envisalink.py

@@ -0,0 +1,71 @@
+"""
+Support for Envisalink zone states- represented as binary sensors.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/binary_sensor.envisalink/
+"""
+import logging
+from homeassistant.components.binary_sensor import BinarySensorDevice
+from homeassistant.components.envisalink import (EVL_CONTROLLER,
+                                                 ZONE_SCHEMA,
+                                                 CONF_ZONENAME,
+                                                 CONF_ZONETYPE,
+                                                 EnvisalinkDevice,
+                                                 SIGNAL_ZONE_UPDATE)
+from homeassistant.const import ATTR_LAST_TRIP_TIME
+
+DEPENDENCIES = ['envisalink']
+_LOGGER = logging.getLogger(__name__)
+
+
+def setup_platform(hass, config, add_devices_callback, discovery_info=None):
+    """Perform the setup for Envisalink sensor devices."""
+    _configured_zones = discovery_info['zones']
+    for zone_num in _configured_zones:
+        _device_config_data = ZONE_SCHEMA(_configured_zones[zone_num])
+        _device = EnvisalinkBinarySensor(
+            zone_num,
+            _device_config_data[CONF_ZONENAME],
+            _device_config_data[CONF_ZONETYPE],
+            EVL_CONTROLLER.alarm_state['zone'][zone_num],
+            EVL_CONTROLLER)
+        add_devices_callback([_device])
+
+
+class EnvisalinkBinarySensor(EnvisalinkDevice, BinarySensorDevice):
+    """Representation of an envisalink Binary Sensor."""
+
+    # pylint: disable=too-many-arguments
+    def __init__(self, zone_number, zone_name, zone_type, info, controller):
+        """Initialize the binary_sensor."""
+        from pydispatch import dispatcher
+        self._zone_type = zone_type
+        self._zone_number = zone_number
+
+        _LOGGER.debug('Setting up zone: ' + zone_name)
+        EnvisalinkDevice.__init__(self, zone_name, info, controller)
+        dispatcher.connect(self._update_callback,
+                           signal=SIGNAL_ZONE_UPDATE,
+                           sender=dispatcher.Any)
+
+    @property
+    def device_state_attributes(self):
+        """Return the state attributes."""
+        attr = {}
+        attr[ATTR_LAST_TRIP_TIME] = self._info['last_fault']
+        return attr
+
+    @property
+    def is_on(self):
+        """Return true if sensor is on."""
+        return self._info['status']['open']
+
+    @property
+    def sensor_class(self):
+        """Return the class of this sensor, from SENSOR_CLASSES."""
+        return self._zone_type
+
+    def _update_callback(self, zone):
+        """Update the zone's state, if needed."""
+        if zone is None or int(zone) == self._zone_number:
+            self.update_ha_state()