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**The extended, configurable markdown-like syntax parser, that produces an AST.** Supports the full set of `markdown`, plus extensions (custom markup with a bit of elixir code to handle parsing.) The AST produced is understandable by [`XmlBuilder`](https://github.com/joshnuss/xml_builder).

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markright lib markright parsers youtube.ex
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lib/markright/parsers/youtube.ex 

defmodule Markright.Parsers.Youtube do

  @moduledoc ~S"""

  Parses the input for the youtube video.



  ## Examples



      iex> input = "✇https://www.youtube.com/watch?v=noQcPIeW6tE&size=5"

      iex> Markright.Parsers.Youtube.to_ast(input)

      %Markright.Continuation{ast: {:iframe,

             %{allowfullscreen: nil, frameborder: 0, height: 315,

               src: "http://www.youtube.com/embed/noQcPIeW6tE", width: 560},

             "http://www.youtube.com/embed/noQcPIeW6tE"}, bag: [tags: []],

            fun: nil, tail: ""}



      iex> "✇http://www.youtube.com/embed/noQcPIeW6tE"

      ...> |> Markright.to_ast()

      ...> |> XmlBuilder.generate()

      "<article>\n\t<p>\n\t\t<iframe allowfullscreen=\"\" frameborder=\"0\" height=\"315\" src=\"http://www.youtube.com/embed/noQcPIeW6tE\" width=\"560\">http://www.youtube.com/embed/noQcPIeW6tE</iframe>\n\t</p>\n</article>"

  """



  use Markright.Continuation

  use Markright.Helpers.Magnet



  def to_ast(input, %Plume{} = plume \\ %Plume{}) when is_binary(input) do

    %Plume{ast: <<@magnet :: binary, url :: binary>>} = cont = astify(input, plume)

    url = code(url)

    iframe = {:iframe, %{width: 560, height: 315, src: url, frameborder: 0, allowfullscreen: nil}}

    Markright.Utils.continuation(:continuation, %Plume{cont | ast: url}, iframe)

  end



  defp youtubify(code), do: "http://www.youtube.com/embed/#{code}"

  (1..24) |> Enum.each(fn i ->

    defp code(<<"http://youtu.be/" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"http://youtu.be/" :: binary, code :: binary-size(unquote(i)), "?" :: binary, _ :: binary>>), do: youtubify(code)

    defp code(<<"http://www.youtube.com/v/" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"http://www.youtube.com/v/" :: binary, code :: binary-size(unquote(i)), "?" :: binary, _ :: binary>>), do: youtubify(code)

    defp code(<<"http://www.youtube.com/embed/" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"http://www.youtube.com/embed/" :: binary, code :: binary-size(unquote(i)), "?" :: binary, _ :: binary>>), do: youtubify(code)

    defp code(<<"http://www.youtube.com/watch?v=" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"http://www.youtube.com/watch?v=" :: binary, code :: binary-size(unquote(i)), "&" :: binary, _ :: binary>>), do: youtubify(code)

    defp code(<<"https://youtu.be/" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"https://youtu.be/" :: binary, code :: binary-size(unquote(i)), "?" :: binary, _ :: binary>>), do: youtubify(code)

    defp code(<<"https://www.youtube.com/v/" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"https://www.youtube.com/v/" :: binary, code :: binary-size(unquote(i)), "?" :: binary, _ :: binary>>), do: youtubify(code)

    defp code(<<"https://www.youtube.com/embed/" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"https://www.youtube.com/embed/" :: binary, code :: binary-size(unquote(i)), "?" :: binary, _ :: binary>>), do: youtubify(code)

    defp code(<<"https://www.youtube.com/watch?v=" :: binary, code :: binary-size(unquote(i))>>), do: youtubify(code)

    defp code(<<"https://www.youtube.com/watch?v=" :: binary, code :: binary-size(unquote(i)), "&" :: binary, _ :: binary>>), do: youtubify(code)

  end)

  defp code(code), do: code

end