Reading time extension for Lambdapad

reading_time.exs

@doc """
A transformation for items. Analyze the content configuring a new value in the metadata
called `reading_time`.
"""

transform "reading_time" do
  set on: :item
  set run: fn(post, _config) ->
    words_count =
      post["content"]
      |> String.replace(~r/@|#|\$|%|&|\^|:|_|!|,/u, " ")
      |> String.split()
      |> length()

    Map.put(post, "reading_time", max(1, div(words_count, 200)))
  end
end