Add flights service

app/services/flights/service.rb

@@ -0,0 +1,23 @@
+class Flights::Service
+  # Takes date and flight number and returns precise flight times,
+  # and hopefully a flightaware faFlightID we can use to keep track of the flight
+  # in the future
+  #
+  # Possible results: ApiError, FlightNotFound, NonEmpty [Flight]
+  #
+  # Will stem mostly from https://flightaware.com/commercial/flightxml/explorer/#op_AirlineFlightSchedules
+  #
+  # Caller note: there do not appear to be guarantees that there will only be one
+  # flight for a given flight number, so we should be prepared to handle the case
+  # where we get multiple back
+  def find_flight_by_number
+  end
+
+  # Similar to find_flight_by_number, but returns a list of flights to pick from
+  #
+  # Possible results: ApiError, [Flight]
+  #
+  # Uses same api endpoint as find_flight_by_number
+  def find_flight_by_airport
+  end
+end