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snowhite lib open_weather weather.ex
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lib/open_weather/weather.ex 

defmodule OpenWeather.Weather do

  @keys ~w(coord weather main id name)a

  defstruct @keys



  alias OpenWeather.Weather.{Main, WeatherItem}



  use Snowhite.Helpers.Decoder, @keys



  def decode_field(:coord, %{"lat" => lat, "lon" => lon}), do: %{lat: lat, lon: lon}

  def decode_field(:weather, weathers), do: Enum.map(weathers, &WeatherItem.decode/1)

  def decode_field(:main, main), do: Main.decode(main)

  def decode_field(_, value), do: value

end