griffin_ssg

defmodule Griffin do
  @moduledoc """
  This is the documentation for the Griffin project.

  By default, Griffin will scan for content in the `priv/content` directory
  and output generated files to the `_site` directory.

  Griffin depends on the following libraries:

    * [Plug](https://hexdocs.pm/plug) - a specification and conveniences
      for composable modules in between web applications
  """

  use Application

    @doc false
    def start(_type, _args) do
      children = [
        {Plug.Cowboy, scheme: :http, plug: Griffin.Web.Plug, options: [port: 4000]}
      ]

      Supervisor.start_link(children, strategy: :one_for_one, name: Griffin.Supervisor)
    end

    @doc false
    def process_file(path) do
      IO.inspect("reading from #{path}")
      content = File.read!(path)
      # string split crashes if the file only contains html and
      # does not contain front matter annotations.
      [yaml, markdown] = String.split(content, ~r/\n---\n/, parts: 2)
      [metadata] = YamlElixir.read_all_from_string!(yaml, atoms: true)
      html = Earmark.as_html!(markdown)
      IO.inspect(html)
      metadata =
        metadata
        |> Map.put("content", html)
        |> Enum.map(fn {k,v} -> {String.to_atom(k), v} end)
        |> IO.inspect(label: "metadata")

      # IO.inspect(html, label: "html")
      rendered =
        EEx.eval_file("installer/blog/priv/layouts/default.html.eex", assigns: metadata)
      unless html == "" do
        output_path = Path.expand("#{path}.html")
        IO.inspect("writing to #{output_path}")
        File.write!(output_path, rendered)
      end
      :ok
    end
end