Tweet weather forecast

forecast.rb

#!/usr/bin/env ruby
# Tweet weather forecast
# - gets forecast from Yahoo weather API
# - reads HTTPClient config from ~/.httpclient.yml and Twitter OAuth credentials from ~/.oauth.yml

require 'yaml'
require 'xmlsimple'
require 'httpclient'
require 'oauthclient'

# Edit place as needed
place            = 'Lisbon'
yahoo_woeid      = '742676'             # Get it from the weather.yahoo.com URL for your city,
                                        # e.g. http://weather.yahoo.com/portugal/lisbon/lisbon-742676/
twitter_place_id = 'c1430b24da8e9229'   # See https://dev.twitter.com/docs/api/1/get/geo/search

# You shouldn't have to edit anything from here down

feed    = URI "http://weather.yahooapis.com/forecastrss?w=#{yahoo_woeid}&u=c"
twitter = URI 'https://api.twitter.com/1/statuses/update.json'

ua_config = YAML.load_file( "#{ENV['HOME']}/.httpclient.yml" )
oauth_config =  YAML.load_file( "#{ENV['HOME']}/.oauth.yml" )

ua = HTTPClient.new
ua_config.each { |k,v| ua.send( "#{k}=", v ) } 

weather = XmlSimple.xml_in( ua.get_content( feed ), { 'ForceArray' => false } )['channel']['item']

message = "\u2601 Forecast for #{place} - " + weather['forecast'].map { |f| 
    "#{f['day']}: #{f['text']}, high #{f['high']}\u2103, low #{f['low']}\u2103"
}.join( ' ; ' )

ua = OAuthClient.new
ua_config.each { |k,v| ua.send( "#{k}=", v ) } 
oauth_config.each { |k,v| ua.oauth_config.send( "#{k}=", v ) } 

ua.post twitter, { status: message, place_id: twitter_place_id }
__END__
# Example .httpclient.yml
protocol_retry_count: 3
connect_timeout: 120
receive_timeout: 300

# Example .oauth.yml
consumer_key     : <application-consumer-key>
consumer_secret  : <application-consumer-secret>
signature_method : HMAC-SHA1
token            : <oauth-token>
secret           : <oauth-secret>