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Weather: rewrite to use weather underground 

this is still a work in progress, but the basic support is there
This commit is contained in:
Brian S. Stephan 2012-09-17 16:26:29 -05:00
parent ded2b9e96e
commit 2699396dd8
1 changed files with 173 additions and 36 deletions
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209
modules/Weather.py
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@ -1,6 +1,6 @@
# coding: utf-8
"""
Weather - query various weather services for info
Weather - query weather underground for info
Copyright (C) 2010 Brian S. Stephan
This program is free software: you can redistribute it and/or modify
@ -17,55 +17,192 @@ You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
import json
import MySQLdb as mdb
import re
from extlib import pywapi
from urllib import quote
from urllib2 import URLError
import urllib2
from Module import Module
class Weather(Module):
"""Provide weather lookup services to the bot."""
def do(self, connection, event, nick, userhost, what, admin_unlocked):
"""Query Google Weather for a location's weather."""
def __init__(self, irc, config, server):
"""Set up regexes and wunderground API."""
match = re.search('^!weather\s+(.*)$', what)
if match:
query = match.group(1)
Module.__init__(self, irc, config, server)
self.weatherre = re.compile("^!weather\s+(.*)$")
# get the API key from config
api_key = self._get_api_key_from_db()
if api_key is None:
raise Exception("weather underground API key not found!")
self.wu_base = 'http://api.wunderground.com/api/{0:s}/'.format(api_key)
def db_init(self):
"""Initialize the tiny table that stores the API key."""
version = self.db_module_registered(self.__class__.__name__)
if version == None:
db = self.get_db()
try:
google_weather = pywapi.get_weather_from_google(quote(query))
city = google_weather['forecast_information']['city'].encode('utf-8')
condition = google_weather['current_conditions']['condition'].encode('utf-8')
temp_f = google_weather['current_conditions']['temp_f'].encode('utf-8')
temp_c = google_weather['current_conditions']['temp_c'].encode('utf-8')
wind = google_weather['current_conditions']['wind_condition'].encode('utf-8')
humidity = google_weather['current_conditions']['humidity'].encode('utf-8')
version = 1
cur = db.cursor(mdb.cursors.DictCursor)
cur.execute('''
CREATE TABLE weather_settings (
api_key VARCHAR(256) NOT NULL
)
''')
wind_speed_regex = re.compile("Wind: [NSEW]+ at ([0-9]+) mph")
matches = wind_speed_regex.search(wind)
db.commit()
self.db_register_module_version(self.__class__.__name__, version)
except mdb.Error as e:
db.rollback()
self.log.error("database error trying to create tables")
self.log.exception(e)
raise
finally: cur.close()
if matches is not None and float(temp_f) < 50.0:
wind_speed = matches.group(1)
windchill = 35.74 + (0.6215 * float(temp_f)) - (35.75 * float(wind_speed)**0.16) + (0.4275 * float(temp_f) * float(wind_speed)**0.16)
else:
windchill = ""
def do(self, connection, event, nick, userhost, what, admin_unlocked):
"""Handle IRC input for a weather queries."""
weatherstr = "Current weather for " + city + ": " + condition + ". " + temp_f + "°F (" + temp_c + "°C), " + wind + ", " + humidity
if windchill is not "":
weatherstr += ", Wind chill: " + str(round(windchill, 2)) + "°F"
weatherstr += "."
match = self.weatherre.search(what)
if match:
# see if there was a specific command given in the query, first
query = match.group(1)
queryitems = query.split(" ")
if len(queryitems) <= 0:
return
for city in google_weather['forecasts']:
weatherstr += " " + city['day_of_week'].encode('utf-8') + ": " + city['condition'].encode('utf-8') + ". High " + city['high'].encode('utf-8') + "°F, Low " + city['low'].encode('utf-8') + "°F."
# search for commands
if queryitems[0] == "conditions":
# current weather query
results = self.get_conditions_for_query(queryitems[1:])
return self.reply(connection, event, results)
else:
# assume they wanted current weather
results = self.get_conditions_for_query(queryitems)
return self.reply(connection, event, results)
return self.reply(connection, event, weatherstr)
except URLError as e:
return self.reply(connection, event, "error connecting to google weather:" + str(e))
except IndexError as e:
return self.reply(connection, event, "error in pywapi: " + str(e))
def get_conditions_for_query(self, queryitems):
"""Make a wunderground conditions call, return as string."""
# recombine the query into a string
query = ' '.join(queryitems)
query = query.replace(' ', '_')
try:
url = self.wu_base + ('{0:s}/q/{1:s}.json'.format('conditions',
query))
json_resp = urllib2.urlopen(url)
condition_data = json.load(json_resp)
except IOError as e:
self.log.error("error while making conditions query")
self.log.exception(e)
raise
# condition data is loaded. the rest of this is obviously specific to
# http://www.wunderground.com/weather/api/d/docs?d=data/conditions
self.log.debug(condition_data)
try:
# just see if we have current_observation data
current = condition_data['current_observation']
except KeyError as e:
self.log.error("error or bad query in conditions lookup")
self.log.exception(e)
return "No results."
else:
try:
location = current['display_location']['full']
reply = "Conditions for {0:s}: ".format(location)
weather_str = current['weather']
if weather_str != '':
reply += "{0:s}, ".format(weather_str)
temp_f = current['temp_f']
temp_c = current['temp_c']
temp_str = current['temperature_string']
if temp_f != '' and temp_c != '':
reply += "{0:.1f}°F ({1:.1f}°C)".format(temp_f, temp_c)
elif temp_str != '':
reply += "{0:s}".format(temp_str)
# append feels like if we have it
feelslike_f = current['feelslike_f']
feelslike_c = current['feelslike_c']
feelslike_str = current['feelslike_string']
if feelslike_f != '' and feelslike_c != '':
reply += ", feels like {0:s}°F ({1:s}°C)".format(feelslike_f, feelslike_c)
elif feelslike_str != '':
reply += ", feels like {0:s}".format(feelslike_str)
# whether this is current or current + feelslike, terminate sentence
reply += ". "
humidity_str = current['relative_humidity']
if humidity_str != '':
reply += "Humidity: {0:s}. ".format(humidity_str)
wind_str = current['wind_string']
if wind_str != '':
reply += "Wind: {0:s}. ".format(wind_str)
pressure_in = current['pressure_in']
pressure_trend = current['pressure_trend']
if pressure_in != '':
reply += "Pressure: {0:s}\"".format(pressure_in)
if pressure_trend != '':
reply += " and {0:s}".format("dropping" if pressure_trend == '-' else "rising")
reply += ". "
heat_index_str = current['heat_index_string']
if heat_index_str != '' and heat_index_str != 'NA':
reply += "Heat index: {0:s}. ".format(heat_index_str)
windchill_str = current['windchill_string']
if windchill_str != '' and windchill_str != 'NA':
reply += "Wind chill: {0:s}. ".format(windchill_str)
visibility_mi = current['visibility_mi']
if visibility_mi != '':
reply += "Visibility: {0:s} miles. ".format(visibility_mi)
precip_in = current['precip_today_in']
if precip_in != '':
reply += "Precipitation today: {0:s}\". ".format(precip_in)
observation_time = current['observation_time']
if observation_time != '':
reply += "{0:s}. ".format(observation_time)
return reply.rstrip()
except KeyError as e:
self.log.error("error or unexpected results in conditions reply")
self.log.exception(e)
return "Error parsing results."
def _get_api_key_from_db(self):
"""Get the API key string from the database, or None if unset."""
api_key = None
db = self.get_db()
try:
cur = db.cursor(mdb.cursors.DictCursor)
query = '''SELECT api_key FROM weather_settings'''
cur.execute(query)
value = cur.fetchone()
if (value != None):
api_key = value['api_key']
except mdb.Error as e:
self.log.error("database error during api key retrieval")
self.log.exception(e)
finally: cur.close()
return api_key
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