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phone

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Phone number parser for telephone numbers in international standard or missing international country code.

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phone lib helpers area.ex
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lib/helpers/area.ex 

defmodule Helper.Area do

  @moduledoc false

  defmacro __using__(_) do

    quote do

      import Helper.Area

      @moduledoc false

    end

  end



  defmacro field(name, value) do

    quote do

      defp unquote(name)(), do: unquote(value)

    end

  end



  defmacro builder do

    quote do

      def match?(number) do

        Regex.match?(regex(), number)

      end



      def builder(number) do

        [_ | country] =

          __MODULE__

          |> Module.split

          |> Enum.reverse

        country =

          country

          |> Enum.reverse

          |> Module.concat



        [[_, code, area, number]] = Regex.scan(regex(), number)



        %{

          country: country.country(),

          a2: country.a2(),

          a3: country.a3(),

          international_code: code,

          number: number,

          area_code: area,

          area_name: area_name(),

          area_type: area_type(),

          area_abbreviation: area_abbreviation()

        }

      end



      def build(number) do

        if match?(number) do

          {:ok, builder(number)}

        else

          {:error, "Not a valid phone number."}

        end

      end



      def build!(number) do

        if match?(number) do

          builder(number)

        else

          raise ArgumentError, message: "Not a valid phone number."

        end

      end

    end

  end

end