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furlex

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Furlex is a structured data extraction tool written in Elixir. It currently supports unfurling oEmbed, Twitter Card, Facebook Open Graph, JSON-LD and plain ole' HTML `<meta />` data out of any url you supply.

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furlex lib furlex parser json_ld.ex
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lib/furlex/parser/json_ld.ex 

defmodule Furlex.Parser.JsonLD do

  @behaviour Furlex.Parser



  @json_library Application.get_env(:furlex, :json_library, Jason)



  @spec parse(String.t) :: nil | {:ok, List.t}

  def parse(html) do

    meta = "script[type=\"application/ld+json\"]"



    case Floki.find(html, meta) do

      nil      ->

        {:ok, []}



      elements ->

        json_ld =

          elements

          |> Enum.map(&decode/1)

          |> List.flatten()



        {:ok, json_ld}

    end

  end



  defp decode(element) do

    element

    |> Floki.text(js: true)

    |> @json_library.decode!()

  end

end