alias JOL.Blog.{Parser,Post,Tag}
alias JOL.Repo
import Ecto.Query

post_dir = Application.app_dir(:jol, "priv/posts/blog/")

Path.wildcard("#{post_dir}/**/*.md")
|> Enum.each(fn path ->
  {attrs, body} = Parser.parse(path, File.read!(path))
    for tag <- attrs.tags do
      Repo.insert!(%Tag{name: tag}, on_conflict: :nothing, conflict_target: [:name])
    end

    post_attrs = %{title: attrs.title,
      published_at: attrs.date,
      slug: attrs.slug,
      body: body,
      tags: Repo.all(from t in Tag, where: t.name in ^attrs.tags)
    }

    %Post{}
    |> Repo.preload(:tags)
    |> Ecto.Changeset.cast(post_attrs, [:published_at, :slug, :body, :title])
    |> Ecto.Changeset.put_assoc(:tags, post_attrs.tags)
    |> Repo.insert!()
  end)