Add exposure notifications (#1135)

esphome/components/exposure_notifications/__init__.py

@@ -0,0 +1,28 @@
+import esphome.codegen as cg
+from esphome import automation
+import esphome.config_validation as cv
+from esphome.components import esp32_ble_tracker
+from esphome.const import CONF_TRIGGER_ID
+
+DEPENDENCIES = ['esp32_ble_tracker']
+
+exposure_notifications_ns = cg.esphome_ns.namespace('exposure_notifications')
+ExposureNotification = exposure_notifications_ns.struct('ExposureNotification')
+ExposureNotificationTrigger = exposure_notifications_ns.class_(
+    'ExposureNotificationTrigger', esp32_ble_tracker.ESPBTDeviceListener,
+    automation.Trigger.template(ExposureNotification))
+
+CONF_ON_EXPOSURE_NOTIFICATION = 'on_exposure_notification'
+
+CONFIG_SCHEMA = cv.Schema({
+    cv.Required(CONF_ON_EXPOSURE_NOTIFICATION): automation.validate_automation(cv.Schema({
+        cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(ExposureNotificationTrigger),
+    }).extend(esp32_ble_tracker.ESP_BLE_DEVICE_SCHEMA)),
+})
+
+
+def to_code(config):
+    for conf in config.get(CONF_ON_EXPOSURE_NOTIFICATION, []):
+        trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID])
+        yield automation.build_automation(trigger, [(ExposureNotification, 'x')], conf)
+        yield esp32_ble_tracker.register_ble_device(trigger, conf)