def __init__(self, config):
self._config = config
self.cache = NullCache()
self.statsd = NullStats()
class Provider(object):
def __init__(self, config):
self._config = config
self.cache = NullCache()
self.statsd = NullStats()
attribution = Attribution(
licence_name="Open Government Licence",
licence_url="http://www.nationalarchives.gov.uk/doc/open-government-licence/",
attribution_text="Contains public sector information provided by the Met Office",
)
def latest_observations(self):
response = self.cache.get(self._CACHE_KEY.format(self._config["location_id"]))
if not response:
self.statsd.incr(__name__ + ".cache_miss")
with self.statsd.timer(__name__ + ".request_time"):
response = self._make_request()
max_age = parse_cache_control_header(response.info().getparam("Cache-Control")).max_age
response = json.load(response)
self.cache.set(self._CACHE_KEY.format(self._config["location_id"]), response, max_age)
else:
self.statsd.incr(__name__ + ".cache_hit")
source_period = response["SiteRep"]["DV"]["Location"]["Period"]
if isinstance(source_period, list):
source_period = source_period[-1]
source_observation = source_period["Rep"][-1]
minutes_since_midnight = timedelta(minutes=int(source_observation["$"]))
obs_time = datetime(*time.strptime(source_period["value"], "%Y-%m-%dZ")[:6], tzinfo=utc)
obs_time += minutes_since_midnight
weather_type, weather_type_id = self.WEATHER_TYPES.get(source_observation["W"])
return {
"type": weather_type,
"type_id": weather_type_id,
"temperature": u"{} °C".format(source_observation["T"]),
"wind_speed": "{} mph".format(source_observation["S"]),
"gust_speed": "{} mph".format(source_observation["G"]) if "G" in source_observation else "N/A",
"wind_direction": source_observation["D"],
"pressure": "{} mb".format(source_observation["P"]),
"obs_location": capwords(response["SiteRep"]["DV"]["Location"]["name"]),
"obs_time": obs_time.isoformat(),
}
def _make_request(self):
return urlopen(
"http://datapoint.metoffice.gov.uk/public/data/val/wxobs/all"
+ "/json/{location_id}?res=hourly&key={api_key}".format(**self._config)
)
_CACHE_KEY = "weather/metoffice/{}"
WEATHER_TYPES = {
"NA": (_("Not available"), ""),
"0": (_("Clear night"), "clear_night"),
"1": (_("Sunny day"), "sun"),
"2": (_("Partly cloudy"), "cloud"),
"3": (_("Partly cloudy"), "cloud"),
"5": (_("Mist"), "fog"),
"6": (_("Fog"), "fog"),
"7": (_("Cloudy"), "cloud"),
"8": (_("Overcast"), "cloud"),
"9": (_("Light rain shower"), "rain"),
"10": (_("Light rain shower"), "rain"),
"11": (_("Drizzle"), "rain"),
"12": (_("Light rain"), "rain"),
"13": (_("Heavy rain shower"), "rain"),
"14": (_("Heavy rain shower"), "rain"),
"15": (_("Heavy rain"), "rain"),
"16": (_("Sleet shower"), "rain"),
"17": (_("Sleet shower"), "rain"),
"18": (_("Sleet"), "rain"),
"19": (_("Hail shower"), "rain"),
"20": (_("Hail shower"), "rain"),
"21": (_("Hail"), "rain"),
"22": (_("Light snow shower"), "snow"),
"23": (_("Light snow shower"), "snow"),
"24": (_("Light snow"), "snow"),
"25": (_("Heavy snow shower"), "snow"),
"26": (_("Heavy snow shower"), "snow"),
"27": (_("Heavy snow"), "snow"),
"28": (_("Thunder shower"), "thunder"),
"29": (_("Thunder shower"), "thunder"),
"30": (_("Thunder"), "thunder"),
}
