Add SmartThings Binary Sensor platform (#20699)

* Add SmartThings binary_sensor platform

* Fixed comment typo.

homeassistant/components/smartthings/binary_sensor.py

@@ -0,0 +1,81 @@
+"""
+Support for binary sensors through the SmartThings cloud API.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/smartthings.binary_sensor/
+"""
+from homeassistant.components.binary_sensor import BinarySensorDevice
+
+from . import SmartThingsEntity
+from .const import DATA_BROKERS, DOMAIN
+
+DEPENDENCIES = ['smartthings']
+
+CAPABILITY_TO_ATTRIB = {
+    'accelerationSensor': 'acceleration',
+    'contactSensor': 'contact',
+    'filterStatus': 'filterStatus',
+    'motionSensor': 'motion',
+    'presenceSensor': 'presence',
+    'soundSensor': 'sound',
+    'tamperAlert': 'tamper',
+    'valve': 'valve',
+    'waterSensor': 'water'
+}
+ATTRIB_TO_CLASS = {
+    'acceleration': 'moving',
+    'contact': 'opening',
+    'filterStatus': 'problem',
+    'motion': 'motion',
+    'presence': 'presence',
+    'sound': 'sound',
+    'tamper': 'problem',
+    'valve': 'opening',
+    'water': 'moisture'
+}
+
+
+async def async_setup_platform(hass, config, async_add_entities,
+                               discovery_info=None):
+    """Platform uses config entry setup."""
+    pass
+
+
+async def async_setup_entry(hass, config_entry, async_add_entities):
+    """Add binary sensors for a config entry."""
+    broker = hass.data[DOMAIN][DATA_BROKERS][config_entry.entry_id]
+    sensors = []
+    for device in broker.devices.values():
+        for capability, attrib in CAPABILITY_TO_ATTRIB.items():
+            if capability in device.capabilities:
+                sensors.append(SmartThingsBinarySensor(device, attrib))
+    async_add_entities(sensors)
+
+
+class SmartThingsBinarySensor(SmartThingsEntity, BinarySensorDevice):
+    """Define a SmartThings Binary Sensor."""
+
+    def __init__(self, device, attribute):
+        """Init the class."""
+        super().__init__(device)
+        self._attribute = attribute
+
+    @property
+    def name(self) -> str:
+        """Return the name of the binary sensor."""
+        return '{} {}'.format(self._device.label, self._attribute)
+
+    @property
+    def unique_id(self) -> str:
+        """Return a unique ID."""
+        return '{}.{}'.format(self._device.device_id, self._attribute)
+
+    @property
+    def is_on(self):
+        """Return true if the binary sensor is on."""
+        return self._device.status.is_on(self._attribute)
+
+    @property
+    def device_class(self):
+        """Return the class of this device."""
+        return ATTRIB_TO_CLASS[self._attribute]