# Default `Logger` formatter
#
# The default formatter decorates the messages with severity labels and colors.
class DefaultFormatter
	super Formatter

	# Do not decorate messages with colors
	#
	# ~~~
	# var formatter = new DefaultFormatter(no_color = true)
	# assert formatter.format(error_level, "My message.") == "Error: My message."
	# ~~~
	var no_color = false is optional, writable

	redef fun format(level, message) do
		var string = message.write_to_string

		if level == fatal_level then
			string = "Fatal: {string}"
		else if level == error_level then
			string = "Error: {string}"
		else if level == warn_level then
			string = "Warning: {string}"
		else if level == info_level then
			string = "Info: {string}"
		else if level == debug_level then
			string = "Debug: {string}"
		end

		if no_color then return string

		if level == fatal_level then
			return string.red
		else if level == error_level then
			return string.red
		else if level == warn_level then
			return string.yellow
		else if level == info_level then
			return string.purple
		else if level == debug_level then
			return string.blue
		end

		return string
	end
end