defmodule LogParser do
  def valid_line?(line) do
    line =~ ~r/^\[DEBUG|INFO|WARNING|ERROR\]/u
  end

  def split_line(line), do: String.split(line, ~r/\<[\~\*\=\-]*\>/i)

  def remove_artifacts(line), do: String.replace(line, ~r/end-of-line\d+/i, "")

  def tag_with_user_name(line) do
    if String.contains?(line, "User") do
      map =
        Regex.named_captures(
          ~r/^(?<type>\[\p{Lu}+\])(?<message>[\w\s]+User[\s\n]+(?<user>\S+)[\s\n]*.*)$/,
          line
        )

      Enum.join(["[USER]", map["user"], map["type"] <> map["message"]], " ")
    else
      line
    end
  end
end