Class: FlightStats::DataFeed::File::SaxParser

Inherits:
Object
  • Object
show all
Includes:
LibXML::XML::SaxParser::Callbacks
Defined in:
lib/flightstats/data_feed/file/sax_parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(file_timestamp_utc, &on_update_block) ⇒ SaxParser

Returns a new instance of SaxParser.



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# File 'lib/flightstats/data_feed/file/sax_parser.rb', line 5

def initialize(file_timestamp_utc, &on_update_block)
  @stack = []
  @file_timestamp_utc = file_timestamp_utc
  @on_update_block = on_update_block
end

Instance Method Details

#on_end_element_ns(name, prefix, uri) ⇒ Object 



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# File 'lib/flightstats/data_feed/file/sax_parser.rb', line 113

def on_end_element_ns (name, prefix, uri)
  raise 'Unclosed entity' if @stack.pop != name
  
  case name
  when 'FlightHistoryEvent'
    @on_update_block.call(@update)
    @update = nil
  when 'FlightHistory'
    @update.flight = @flight if @stack.last == 'FlightHistoryEvent'
    @flight = nil
  when 'FlightHistoryCodeshare', 'CodeshareEntry'
    @flight.codeshares << @codeshare if @stack.last == 'FlightHistory'
    @codeshare = nil
  when 'Airline'
    case @stack.last
    when 'FlightHistory'
      @flight.airline = @airline
    when 'FlightHistoryCodeshare', 'CodeshareEntry'
      @codeshare.airline = @airline
    end
    @airline = nil
  when 'Origin'
    @flight.origin = @origin if @stack.last == 'FlightHistory'
    @origin = nil
  when 'Destination'
    @flight.destination = @destination if @stack.last == 'FlightHistory'
    @destination = nil
  when 'Diverted'
    @flight.diverted = @diverted if @stack.last == 'FlightHistory'
    @diverted = nil
  end
end

#on_start_element_ns(name, attributes, prefix, uri, namespaces) ⇒ Object 



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# File 'lib/flightstats/data_feed/file/sax_parser.rb', line 17

def on_start_element_ns(name, attributes, prefix, uri, namespaces)
  @stack.push(name)
  attributes = attributes.delete_if{ |k,v| v.strip.empty? }

  case name
  when 'FlightHistoryEvent'
    @update = FlightStats::DataFeed::File::FlightUpdate.new
    @update.source = attributes['DataSource']
    @update.event = attributes['Event']
    @update.data_updated = attributes['DataUpdated']
    tz = TZInfo::Timezone.get('America/Los_Angeles')
    @update.timestamp = tz.local_to_utc(to_time(attributes['DateTimeRecorded'])) do |periods|
      if @file_timestamp_utc
        periods.select{ |period|
          period.to_utc(to_time(attributes['DateTimeRecorded'])).hour == @file_timestamp_utc.utc.hour
        }
      end
    end
  when 'FlightHistory'
    @flight = FlightStats::Flight.new
    @flight.id = attributes['FlightHistoryId']
    @flight.number = attributes['FlightNumber']
    @flight.tail_number = attributes['TailNumber']
    @flight.status = attributes['Status']
    @flight.status_code = attributes['StatusCode']
    @flight.creator_code = attributes['CreatorCode']
    @flight.published_local_departure_time = to_time(attributes['PublishedDepartureDate'])
    @flight.published_local_arrival_time = to_time(attributes['PublishedArrivalDate'])
    @flight.local_arrival_time = to_time(attributes['PublishedArrivalDate'])
    @flight.scheduled_local_gate_departure_time = to_time(attributes['ScheduledGateDepartureDate'])
    @flight.estimated_local_gate_departure_time = to_time(attributes['EstimatedGateDepartureDate'])
    @flight.actual_local_gate_departure_time = to_time(attributes['ActualGateDepartureDate'])
    @flight.scheduled_local_gate_arrival_time = to_time(attributes['ScheduledGateArrivalDate'])
    @flight.estimated_local_gate_arrival_time = to_time(attributes['EstimatedGateArrivalDate'])
    @flight.actual_local_gate_arrival_time = to_time(attributes['ActualGateArrivalDate'])
    @flight.scheduled_local_runway_departure_time = to_time(attributes['ScheduledRunwayDepartureDate'])
    @flight.estimated_local_runway_departure_time = to_time(attributes['EstimatedRunwayDepartureDate'])
    @flight.actual_local_runway_departure_time = to_time(attributes['ActualRunwayDepartureDate'])
    @flight.scheduled_local_runway_arrival_time = to_time(attributes['ScheduledRunwayArrivalDate'])
    @flight.estimated_local_runway_arrival_time = to_time(attributes['EstimatedRunwayArrivalDate'])
    @flight.actual_local_runway_arrival_time = to_time(attributes['ActualRunwayArrivalDate'])
    @flight.scheduled_air_time = attributes['ScheduledAirTime'].to_i if attributes['ScheduledAirTime']
    @flight.actual_air_time = attributes['ActualAirTime'].to_i if attributes['ActualAirTime']
    @flight.scheduled_block_time = attributes['ScheduledBlockTime'].to_i if attributes['ScheduledBlockTime']
    @flight.actual_block_time = attributes['ActualBlockTime'].to_i if attributes['ActualBlockTime']
    @flight.departure_airport_timezone_offset = attributes['DepartureAirportTimeZoneOffset'].to_f if attributes['DepartureAirportTimeZoneOffset']
    @flight.arrival_airport_timezone_offset = attributes['ArrivalAirportTimeZoneOffset'].to_f if attributes['ArrivalAirportTimeZoneOffset']
    @flight.diverted_airport_timezone_offset = attributes['DivertedAirportTimeZoneOffset'].to_f if attributes['DivertedAirportTimeZoneOffset']
    @flight.local_departure_time = to_time(attributes['DepartureDate'])
    @flight.local_arrival_time = to_time(attributes['ArrivalDate'])
    @flight.scheduled_aircraft_type = attributes['ScheduledAircraftType']
    @flight.actual_aircraft_type = attributes['ActualAircraftType']
    @flight.departure_gate = attributes['DepartureGate']
    @flight.departure_terminal = attributes['DepartureTerminal']
    @flight.arrival_gate = attributes['ArrivalGate']
    @flight.arrival_terminal = attributes['ArrivalTerminal']
    @flight.baggage_claim = attributes['BaggageClaim']
  when 'FlightHistoryCodeshare', 'CodeshareEntry'
    @codeshare = FlightStats::Flight::Codeshare.new
    @codeshare.id = attributes['FlightHistoryCodeshareId']
    @codeshare.number = attributes['FlightNumber']
    @codeshare.tail_number = attributes['TailNumber']
    @codeshare.published_local_departure_time = to_time(attributes['PublishedDepartureDate'])
    @codeshare.published_local_arrival_time = to_time(attributes['PublishedArrivalDate'])
    @codeshare.designator = attributes['Designator']
  when 'Airline'
    @airline = FlightStats::Airline.new
    @airline.code = attributes['AirlineCode']
    @airline.name = attributes['Name']
    @airline.iata_code = attributes['IATACode']
    @airline.icao_code = attributes['ICAOCode']
    @airline.faa_code = attributes['FAACode']
  when 'Origin'
    @origin = FlightStats::Airport.new
    @origin.code = attributes['AirportCode']
    @origin.iata_code = attributes['IATACode']
    @origin.icao_code = attributes['ICAOCode']
    @origin.faa_code = attributes['FAACode']
    @origin.name = attributes['Name']
  when 'Destination'
    @destination = FlightStats::Airport.new
    @destination.code = attributes['AirportCode']
    @destination.iata_code = attributes['IATACode']
    @destination.icao_code = attributes['ICAOCode']
    @destination.faa_code = attributes['FAACode']
    @destination.name = attributes['Name']
  when 'Diverted'
    @diverted = FlightStats::Airport.new
    @diverted.code = attributes['AirportCode']
    @diverted.iata_code = attributes['IATACode']
    @diverted.icao_code = attributes['ICAOCode']
    @diverted.faa_code = attributes['FAACode']
    @diverted.name = attributes['Name']
  end
end

#to_time(string) ⇒ Object 



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# File 'lib/flightstats/data_feed/file/sax_parser.rb', line 11

def to_time(string)
  return nil if string.nil?
  Time.utc(string[0..3],string[5..6],string[8..9],
           string[11..12],string[14..15],string[17..18],string[20..22]+'000')
end