Class: NationalRail::LiveDepartureBoards

Inherits:
Object
  • Object
show all
Defined in:
lib/national-rail/live_departure_boards.rb

Defined Under Namespace

Classes: SummaryRow

Instance Method Summary collapse

Instance Method Details

#summary(options = {}) ⇒ Object


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# File 'lib/national-rail/live_departure_boards.rb', line 33

def summary(options = {})
  departing = case options[:type]
  when :departures
    true
  when :arrivals
    false
  else
    true
  end
  if departing
    liveTrainsFrom, liveTrainsTo = options[:from], options[:to]
    origin_or_destination = :destination
  else
    liveTrainsFrom, liveTrainsTo = options[:to], options[:from]
    origin_or_destination = :origin
  end
  url = "http://ojp.nationalrail.co.uk/en/s/ldb/liveTrainsJson"
  params = { "departing" => departing.to_s, "liveTrainsFrom" => liveTrainsFrom, "liveTrainsTo" => liveTrainsTo }
  uri = URI.parse("#{url}?#{params.to_query}")
  response = Net::HTTP.get_response(uri)
  json = ActiveSupport::JSON.decode(response.body)
  trains = json["trains"].map do |row|
    service_id = CGI.unescape(%r{/en/s/ldbdetails/([^\?]+)}.match(row[5])[1])
    SummaryRow.new(
      :service_id => service_id,
      :due => row[1],
      origin_or_destination => row[2],
      :status => CGI.unescapeHTML(row[3]).split("<br/>").map(&:strip),
      :platform => row[4]
    )
  end
end