require 'date'
require 'cgi'
module Agents
class WeatherAgent < Agent
cannot_receive_events!
gem_dependency_check { defined?(Wunderground) && defined?(ForecastIO) }
description <<-MD
The Weather Agent creates an event for the day's weather at a given `location`.
#{'## Include `forecast_io` and `wunderground` in your Gemfile to use this Agent!' if dependencies_missing?}
You also must select `which_day` you would like to get the weather for where the number 0 is for today and 1 is for tomorrow and so on. Weather is only returned for 1 week at a time.
The weather can be provided by either Wunderground or ForecastIO. To choose which `service` to use, enter either `forecastio` or `wunderground`.
The `location` can be a US zipcode, or any location that Wunderground supports. To find one, search [wunderground.com](http://wunderground.com) and copy the location part of the URL. For example, a result for San Francisco gives `http://www.wunderground.com/US/CA/San_Francisco.html` and London, England gives `http://www.wunderground.com/q/zmw:00000.1.03772`. The locations in each are `US/CA/San_Francisco` and `zmw:00000.1.03772`, respectively.
If you plan on using ForecastIO, the `location` must be a comma-separated string of co-ordinates (longitude, latitude). For example, San Francisco would be `37.7771,-122.4196`.
You must setup an [API key for Wunderground](http://www.wunderground.com/weather/api/) in order to use this Agent with Wunderground.
You must setup an [API key for Forecast](https://developer.forecast.io/) in order to use this Agent with ForecastIO.
Set `expected_update_period_in_days` to the maximum amount of time that you'd expect to pass between Events being created by this Agent.
MD
event_description <<-MD
Events look like this:
{
"location": "12345",
"date": {
"epoch": "1357959600",
"pretty": "10:00 PM EST on January 11, 2013"
},
"high": {
"fahrenheit": "64",
"celsius": "18"
},
"low": {
"fahrenheit": "52",
"celsius": "11"
},
"conditions": "Rain Showers",
"icon": "rain",
"icon_url": "http://icons-ak.wxug.com/i/c/k/rain.gif",
"skyicon": "mostlycloudy",
...
}
MD
default_schedule "8pm"
def working?
event_created_within?((interpolated['expected_update_period_in_days'].presence || 2).to_i) && !recent_error_logs?
end
def key_setup?
interpolated['api_key'].present? && interpolated['api_key'] != "your-key"
end
def default_options
{
'service' => 'wunderground',
'api_key' => 'your-key',
'location' => '94103',
'which_day' => '1',
'expected_update_period_in_days' => '2'
}
end
def check
if key_setup?
create_event :payload => model(weather_provider, which_day).merge('location' => location)
end
end
private
def weather_provider
interpolated["service"].presence || "wunderground"
end
def which_day
(interpolated["which_day"].presence || 1).to_i
end
def location
interpolated["location"].presence || interpolated["zipcode"]
end
def validate_options
errors.add(:base, "service must be set to 'forecastio' or 'wunderground'") unless ["forecastio", "wunderground"].include?(weather_provider)
errors.add(:base, "location is required") unless location.present?
errors.add(:base, "api_key is required") unless key_setup?
errors.add(:base, "which_day selection is required") unless which_day.present?
end
def wunderground
Wunderground.new(interpolated['api_key']).forecast_for(location)['forecast']['simpleforecast']['forecastday'] if key_setup?
end
def forecastio
if key_setup?
ForecastIO.api_key = interpolated['api_key']
lat, lng = location.split(',')
ForecastIO.forecast(lat,lng)['daily']['data']
end
end
def model(weather_provider,which_day)
if weather_provider == "wunderground"
wunderground[which_day]
elsif weather_provider == "forecastio"
forecastio.each do |value|
timestamp = Time.at(value.time)
if (timestamp.to_date - Time.now.to_date).to_i == which_day
day = {
'date' => {
'epoch' => value.time.to_s,
'pretty' => timestamp.strftime("%l:%M %p %Z on %B %d, %Y"),
'day' => timestamp.day,
'month' => timestamp.month,
'year' => timestamp.year,
'yday' => timestamp.yday,
'hour' => timestamp.hour,
'min' => timestamp.strftime("%M"),
'sec' => timestamp.sec,
'isdst' => timestamp.isdst ? 1 : 0 ,
'monthname' => timestamp.strftime("%B"),
'monthname_short' => timestamp.strftime("%b"),
'weekday_short' => timestamp.strftime("%a"),
'weekday' => timestamp.strftime("%A"),
'ampm' => timestamp.strftime("%p"),
'tz_short' => timestamp.zone
},
'period' => which_day.to_i,
'high' => {
'fahrenheit' => value.temperatureMax.round().to_s,
'epoch' => value.temperatureMaxTime.to_s,
'fahrenheit_apparent' => value.apparentTemperatureMax.round().to_s,
'epoch_apparent' => value.apparentTemperatureMaxTime.to_s,
'celsius' => ((5*(Float(value.temperatureMax) - 32))/9).round().to_s
},
'low' => {
'fahrenheit' => value.temperatureMin.round().to_s,
'epoch' => value.temperatureMinTime.to_s,
'fahrenheit_apparent' => value.apparentTemperatureMin.round().to_s,
'epoch_apparent' => value.apparentTemperatureMinTime.to_s,
'celsius' => ((5*(Float(value.temperatureMin) - 32))/9).round().to_s
},
'conditions' => value.summary,
'icon' => value.icon,
'avehumidity' => (value.humidity * 100).to_i,
'sunriseTime' => value.sunriseTime.to_s,
'sunsetTime' => value.sunsetTime.to_s,
'moonPhase' => value.moonPhase.to_s,
'precip' => {
'intensity' => value.precipIntensity.to_s,
'intensity_max' => value.precipIntensityMax.to_s,
'intensity_max_epoch' => value.precipIntensityMaxTime.to_s,
'probability' => value.precipProbability.to_s,
'type' => value.precipType
},
'dewPoint' => value.dewPoint.to_s,
'avewind' => {
'mph' => value.windSpeed.round().to_s,
'kph' => (Float(value.windSpeed) * 1.609344).round().to_s,
'degrees' => value.windBearing.to_s
},
'visibility' => value.visibility.to_s,
'cloudCover' => value.cloudCover.to_s,
'pressure' => value.pressure.to_s,
'ozone' => value.ozone.to_s
}
return day
end
end
end
end
end
end