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The web interface for Gust

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gust_web lib gust_web mermaid.ex
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lib/gust_web/mermaid.ex 

defmodule GustWeb.Mermaid do

  def chart(tasks) do

    tasks

    |> Enum.reduce("flowchart LR\n ", fn {name, %{upstream: upstream}}, flow_description ->

      upstream = upstream |> MapSet.to_list()

      lines = name |> build_lines(upstream)



      "#{flow_description}#{lines}"

    end)

  end



  defp build_lines(name, []) do

    "\n#{name}"

  end



  defp build_lines(name, upstream) do

    upstream

    |> Enum.reduce("", fn upstream_name, line ->

      "#{line}\n#{upstream_name} --> #{name}"

    end)

  end

end