Add Magicseaweed API support

.coveragerc

@@ -626,6 +626,7 @@ omit =
     homeassistant/components/sensor/loopenergy.py
     homeassistant/components/sensor/luftdaten.py
     homeassistant/components/sensor/lyft.py
+    homeassistant/components/sensor/magicseaweed.py
     homeassistant/components/sensor/metoffice.py
     homeassistant/components/sensor/miflora.py
     homeassistant/components/sensor/mitemp_bt.py

homeassistant/components/sensor/magicseaweed.py

@@ -0,0 +1,201 @@
+"""
+Support for magicseaweed data from magicseaweed.com.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/sensor.magicseaweed/
+"""
+from datetime import timedelta
+import logging
+import voluptuous as vol
+
+from homeassistant.components.sensor import PLATFORM_SCHEMA
+from homeassistant.const import (
+    CONF_API_KEY, CONF_NAME, CONF_MONITORED_CONDITIONS, ATTR_ATTRIBUTION)
+import homeassistant.helpers.config_validation as cv
+import homeassistant.util.dt as dt_util
+from homeassistant.helpers.entity import Entity
+from homeassistant.util import Throttle
+
+REQUIREMENTS = ['magicseaweed==1.0.0']
+
+_LOGGER = logging.getLogger(__name__)
+
+CONF_HOURS = 'hours'
+CONF_SPOT_ID = 'spot_id'
+CONF_UNITS = 'units'
+CONF_UPDATE_INTERVAL = 'update_interval'
+
+DEFAULT_UNIT = 'us'
+DEFAULT_NAME = 'MSW'
+DEFAULT_ATTRIBUTION = "Data provided by magicseaweed.com"
+
+ICON = 'mdi:waves'
+
+HOURS = ['12AM', '3AM', '6AM', '9AM', '12PM', '3PM', '6PM', '9PM']
+
+SENSOR_TYPES = {
+    'max_breaking_swell': ['Max'],
+    'min_breaking_swell': ['Min'],
+    'swell_forecast': ['Forecast'],
+}
+
+UNITS = ['eu', 'uk', 'us']
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    vol.Required(CONF_MONITORED_CONDITIONS):
+        vol.All(cv.ensure_list, [vol.In(SENSOR_TYPES)]),
+    vol.Required(CONF_API_KEY): cv.string,
+    vol.Required(CONF_SPOT_ID): vol.All(cv.ensure_list, [cv.string]),
+    vol.Optional(CONF_HOURS, default=None):
+        vol.All(cv.ensure_list, [vol.In(HOURS)]),
+    vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
+    vol.Optional(CONF_UNITS): vol.In(UNITS),
+})
+
+# Return cached results if last scan was less then this time ago.
+MIN_TIME_BETWEEN_UPDATES = timedelta(minutes=30)
+
+
+def setup_platform(hass, config, add_devices, discovery_info=None):
+    """Set up the Magicseaweed sensor."""
+    name = config.get(CONF_NAME)
+    spot_id = config[CONF_SPOT_ID]
+    api_key = config[CONF_API_KEY]
+    hours = config.get(CONF_HOURS)
+
+    if CONF_UNITS in config:
+        units = config.get(CONF_UNITS)
+    elif hass.config.units.is_metric:
+        units = UNITS[0]
+    else:
+        units = UNITS[2]
+
+    forecast_data = MagicSeaweedData(
+        api_key=api_key,
+        spot_id=spot_id,
+        units=units)
+    forecast_data.update()
+
+    # If connection failed don't setup platform.
+    if forecast_data.currently is None or forecast_data.hourly is None:
+        return
+
+    sensors = []
+    for variable in config[CONF_MONITORED_CONDITIONS]:
+        sensors.append(MagicSeaweedSensor(forecast_data, variable, name,
+                                          units))
+        if 'forecast' in variable and hours is not None:
+            for hour in hours:
+                sensors.append(MagicSeaweedSensor(
+                    forecast_data, variable, name, units, hour))
+    add_devices(sensors, True)
+
+
+class MagicSeaweedSensor(Entity):
+    """Implementation of a MagicSeaweed sensor."""
+
+    def __init__(self, forecast_data, sensor_type, name, unit_system,
+                 hour=None):
+        """Initialize the sensor."""
+        self.client_name = name
+        self.data = forecast_data
+        self.hour = hour
+        self.type = sensor_type
+        self._attrs = {ATTR_ATTRIBUTION: DEFAULT_ATTRIBUTION}
+        self._name = SENSOR_TYPES[sensor_type][0]
+        self._icon = None
+        self._state = None
+        self._unit_system = unit_system
+        self._unit_of_measurement = None
+
+    @property
+    def name(self):
+        """Return the name of the sensor."""
+        if self.hour is None and 'forecast' in self.type:
+            return "{} {}".format(self.client_name, self._name)
+        if self.hour is None:
+            return "Current {} {}".format(self.client_name, self._name)
+        return "{} {} {}".format(
+            self.hour, self.client_name, self._name)
+
+    @property
+    def state(self):
+        """Return the state of the sensor."""
+        return self._state
+
+    @property
+    def unit_system(self):
+        """Return the unit system of this entity."""
+        return self._unit_system
+
+    @property
+    def unit_of_measurement(self):
+        """Return the unit of measurement of this entity, if any."""
+        return self._unit_of_measurement
+
+    @property
+    def icon(self):
+        """Return the entity weather icon, if any."""
+        return ICON
+
+    @property
+    def device_state_attributes(self):
+        """Return the state attributes."""
+        return self._attrs
+
+    def update(self):
+        """Get the latest data from Magicseaweed and updates the states."""
+        self.data.update()
+        if self.hour is None:
+            forecast = self.data.currently
+        else:
+            forecast = self.data.hourly[self.hour]
+
+        self._unit_of_measurement = forecast.swell_unit
+        if self.type == 'min_breaking_swell':
+            self._state = forecast.swell_minBreakingHeight
+        elif self.type == 'max_breaking_swell':
+            self._state = forecast.swell_maxBreakingHeight
+        elif self.type == 'swell_forecast':
+            summary = "{} - {}".format(
+                forecast.swell_minBreakingHeight,
+                forecast.swell_maxBreakingHeight)
+            self._state = summary
+            if self.hour is None:
+                for hour, data in self.data.hourly.items():
+                    occurs = hour
+                    hr_summary = "{} - {} {}".format(
+                        data.swell_minBreakingHeight,
+                        data.swell_maxBreakingHeight,
+                        data.swell_unit)
+                    self._attrs[occurs] = hr_summary
+
+        if self.type != 'swell_forecast':
+            self._attrs.update(forecast.attrs)
+
+
+class MagicSeaweedData:
+    """Get the latest data from MagicSeaweed."""
+
+    def __init__(self, api_key, spot_id, units):
+        """Initialize the data object."""
+        import magicseaweed
+        self._msw = magicseaweed.MSW_Forecast(api_key, spot_id,
+                                              None, units)
+        self.currently = None
+        self.hourly = {}
+
+        # Apply throttling to methods using configured interval
+        self.update = Throttle(MIN_TIME_BETWEEN_UPDATES)(self._update)
+
+    def _update(self):
+        """Get the latest data from MagicSeaweed."""
+        try:
+            forecasts = self._msw.get_future()
+            self.currently = forecasts.data[0]
+            for forecast in forecasts.data[:8]:
+                hour = dt_util.utc_from_timestamp(
+                    forecast.localTimestamp).strftime("%-I%p")
+                self.hourly[hour] = forecast
+        except ConnectionError:
+            _LOGGER.error("Unable to retrieve data from Magicseaweed")

requirements_all.txt

@@ -514,6 +514,9 @@ luftdaten==0.1.3
 # homeassistant.components.sensor.lyft
 lyft_rides==0.2
 
+# homeassistant.components.sensor.magicseaweed
+magicseaweed==1.0.0
+
 # homeassistant.components.matrix
 matrix-client==0.2.0