Class: WeatherFetcher::MetarProvider

Inherits:
HtmlBasedProvider show all
Defined in:
lib/weather_fetcher/providers/metar_provider.rb

Constant Summary collapse

TYPE = 
:metar
MAX_METAR_TIME_THRESHOLD =

treat metars as not current when time_from is not within time range

4*3600

Constants inherited from HtmlBasedProvider

HtmlBasedProvider::USER_AGENT

Constants inherited from Provider

Provider::HOUR

Instance Attribute Summary

Attributes inherited from Provider

#defs, #logger, #weathers

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from HtmlBasedProvider

#fetch_url, #fetch_url_old, #url

Methods inherited from Provider

#fetch, #initialize, #provider_name, #provider_params, short_class_name, #short_class_name, #store_city_definition, #store_time_costs, #unix_time_today, #url

Constructor Details

This class inherits a constructor from WeatherFetcher::Provider

Class Method Details

.provider_name ⇒ Object 



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# File 'lib/weather_fetcher/providers/metar_provider.rb', line 52

def self.provider_name
  "MetarProvider"
end

.weather_updated_every ⇒ Object

How often weather is updated



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# File 'lib/weather_fetcher/providers/metar_provider.rb', line 74

def self.weather_updated_every
  10*60
end

Instance Method Details

#can_fetch?(p) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/weather_fetcher/providers/metar_provider.rb', line 65

def can_fetch?(p)
  begin
    metar(p).nil? == false
  rescue
    false
  end
end

#fetch_and_process_single(p) ⇒ Object

Get processed weather for one definition



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# File 'lib/weather_fetcher/providers/metar_provider.rb', line 12

def fetch_and_process_single(p)
  return nil unless can_fetch?(p)

  @pre_download = Time.now
  url = url_for_metar(metar(p))
  body = fetch_url(url)
  @pre_process = Time.now
  metars = process(body)
  metars = [metars] unless metars.kind_of?(Array)
  processed = Array.new

  metars.each do |m|
    m = SimpleMetarParser::Parser.parse(m)

    if m.valid? and (m.time_from - Time.now).abs < MAX_METAR_TIME_THRESHOLD
      processed << {
        :time_created => Time.now,
        :time_from => m.time_from,
        :time_to => m.time_to,
        :temperature => m.temperature.degrees,
        :pressure => m.pressure.hpa,
        :wind_kmh => m.wind.kmh,
        :wind => m.wind.mps,
        :snow_metar => m.specials.snow_metar,
        :rain_metar => m.specials.rain_metar,
        :provider => self.class.provider_name,
        :metar_string => m.raw
      }
    end

  end

  processed = WeatherData.factory(processed)
  @post_process = Time.now
  store_time_costs(processed)
  store_city_definition(processed, p)

  return processed
end

#metar(p) ⇒ Object

Metar



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# File 'lib/weather_fetcher/providers/metar_provider.rb', line 61

def metar(p)
  p[:metar]
end

#url_for_metar(metar_city) ⇒ Object 



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# File 'lib/weather_fetcher/providers/metar_provider.rb', line 56

def url_for_metar(metar_city)
  raise 'Not implemented'
end