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# frozen_string_literal: true
require "set"
require_relative "template"
require_relative "structured"
module Dry
module Logger
module Formatters
# Basic string formatter.
#
# This formatter returns log entries in key=value format.
#
# @since 1.0.0
# @api public
class String < Structured
# @since 1.0.0
# @api private
HASH_SEPARATOR = ","
# @since 1.0.0
# @api private
EXCEPTION_SEPARATOR = ": "
# @since 1.2.0
# @api private
DEFAULT_SEVERITY_COLORS = {
DEBUG => :cyan,
INFO => :magenta,
WARN => :yellow,
ERROR => :red,
FATAL => :red,
UNKNOWN => :blue
}.freeze
# @since 1.0.0
# @api private
attr_reader :template
# @since 1.0.0
# @api private
def initialize(template: Logger.templates[:default], **options)
super(**options)
@template = Template[template]
end
# @since 1.0.0
# @api private
def colorize?
options[:colorize].equal?(true)
end
private
# @since 1.0.0
# @api private
def format_severity(value)
output = value.upcase
if colorize?
Colors.call(severity_colors[LEVELS[value]], output)
else
output
end
end
# @since 1.0.0
# @api private
def format(entry)
if entry.exception?
head = template % template_data(entry, exclude: %i[exception])
tail = format_exception(entry.exception)
"#{head}#{NEW_LINE}#{TAB}#{tail}"
else
template % template_data(entry)
end
end
# @since 1.0.0
# @api private
def format_tags(value)
Array(value)
.map { |tag|
case tag
when Hash then format_payload(tag)
else
tag.to_s
end
}
.join(SEPARATOR)
end
# @since 1.0.0
# @api private
def format_exception(value)
[
"#{value.message} (#{value.class})",
format_backtrace(value.backtrace || EMPTY_BACKTRACE)
].join(NEW_LINE)
end
# @since 1.0.0
# @api private
def format_payload(payload)
payload.map { |key, value| "#{key}=#{value.inspect}" }.join(SEPARATOR)
end
# @since 1.0.0
# @api private
def format_backtrace(value)
value.map { |line| "#{TAB}#{line}" }.join(NEW_LINE)
end
# @since 1.0.0
# @api private
def template_data(entry, exclude: EMPTY_ARRAY)
data = format_values(entry)
payload = data.except(:message, *entry.meta.keys, *template.tokens, *exclude)
data[:payload] = format_payload(payload)
if template.include?(:tags)
data[:tags] = format_tags(entry.tags)
end
if data[:message]
data.except(*payload.keys)
elsif template.include?(:message)
data[:message] = data.delete(:payload)
data[:payload] = nil
data
else
data
end
end
# @since 1.0.0
# @api private
def severity_colors
@severity_colors ||= DEFAULT_SEVERITY_COLORS.merge(
(options[:severity_colors] || EMPTY_HASH)
.to_h { |key, value| [LEVELS[key.to_s], value] }
)
end
end
end
end
end
|
