Phoenix.HTML.Safe implementation(s)

safe.ex

defimpl Phoenix.HTML.Safe, for: Version do
  # Based on `to_string` implementation
  # https://github.com/elixir-lang/elixir/blob/v1.13.4/lib/elixir/lib/version.ex#L629
  def to_iodata(%Version{} = version) do
    [
      Integer.to_string(version.major),
      Integer.to_string(version.minor),
      [Integer.to_string(version.patch), pre(version.pre), build(version.build)]
    ]
    |> Enum.intersperse(".")
  end

  defp build(nil) do
    ""
  end

  defp build(build) do
    ["+", Phoenix.HTML.Safe.to_iodata(build)]
  end

  defp pre([]) do
    ""
  end

  defp pre(pre) do
    pre
    |> Enum.map(fn
      int when is_integer(int) -> Integer.to_string(int)
      string when is_binary(string) -> Phoenix.HTML.Safe.to_iodata(string)
    end)
    |> Enum.intersperse(".")
    |> List.insert_at(0, "-")
  end
end