easy-going-rails/lib/formatters/ansi_formatter.rb

require_relative 'ansi_wrapper'
require_relative 'ansi_colors'

require 'io/console'
require 'amazing_print'
require 'json'

class AnsiFormatter < SemanticLogger::Formatters::Color
  include AnsiColors

  ANSI_DEBUG = BG_BLACK + TEXT_GRAY_500
  ANSI_INFO = BG_BLACK + TEXT_GRAY_200
  ANSI_WARN = BG_YELLOW + TEXT_BLACK
  ANSI_ERROR = BG_RED + TEXT_BLACK
  ANSI_FATAL = DARK_BG_RED + TEXT_BLACK

  def initialize
    super(color_map: ColorMap.new(
      debug: ANSI_DEBUG,
      info: ANSI_INFO,
      warn: ANSI_WARN,
      error: ANSI_ERROR,
      fatal: ANSI_FATAL
    ))
  end

  def message
    return unless log.message

    colorize(log.message, color_map[log.level])
  end

  def call(log, logger)
    self.log = log
    self.logger = logger
    self.color = color_map[log.level]
    wrap_level(level, message, payload, exception)
  end

  private

  def colorize(text, color)
    "#{color}#{text}#{color_map.clear}"
  end

  def wrap_level(level, *items)
    prefix = " #{colorize('>', color)} "
    continuation = " #{colorize('#', color)} "
    items.map do |item|
      AnsiWrapper.wrap(item, 100, prefix, continuation)
    end.compact.join("\n") # FIXME: previously was: join(' ')
  end
end