module AmtrakStations

# File lib/amtrak_stations.rb, line 21
def self.all
  @all ||= parsed_data.map do |_station_code, station_data|
    Station.new(
      station_data.each_with_object({}) { |(k, v), h| h[k.to_sym] = v }
    )
  end
end

# File lib/amtrak_stations.rb, line 6
def self.find_by_station_code(station_code)
  return unless station_code.length == 3
  station_data = parsed_data.fetch(station_code, nil)

  return unless station_data

  Station.new(
    station_data.each_with_object({}) { |(k, v), h| h[k.to_sym] = v }
  )
end

# File lib/amtrak_stations.rb, line 29
def self.parsed_data
  @parsed_data ||= JSON.parse(data)
end

# File lib/amtrak_stations.rb, line 17
def self.station_codes
  parsed_data.keys
end

# File lib/amtrak_stations.rb, line 33
def self.data
  @data || File.read(data_path)
end

# File lib/amtrak_stations.rb, line 38
def self.data_path
  File.expand_path("../data/stations.json", __dir__)
end