rain

defmodule Rain.Progress do
  defstruct url: "", name: "unknown", total: 0, size: 0

  def start_link(url, name) do
    Agent.start_link(fn -> %Rain.Progress{url: url, name: name} end)
  end

  def get(progress) do
    Agent.get(progress, &Map.from_struct(&1))
  end

  def set_total(progress, total) do
    Agent.cast(progress, fn struct ->
      %{struct | total: total}
    end)
  end

  def progress(progress, size) do
    Agent.cast(progress, fn struct ->
      %{struct | size: struct.size + size}
    end)
  end

  def stop(progress) do
    Agent.stop(progress)
  end
end