module RuboCop::Cop::Lint::Syntax

def self.beautify_message(message)
  message = message.capitalize
  message << '.' unless message.end_with?('.')
  message
end

def self.offense_from_diagnostic(diagnostic, ruby_version)
  Offense.new(
    diagnostic.level,
    diagnostic.location,
    "#{diagnostic.message}\n(Using Ruby #{ruby_version} parser; " \
    'configure using `TargetRubyVersion` parameter, under `AllCops`)',
    COP_NAME
  )
end

def self.offense_from_error(error)
  message = beautify_message(error.message)
  Offense.new(:fatal, ERROR_SOURCE_RANGE, message, COP_NAME)
end

def self.offenses_from_processed_source(processed_source)
  offenses = []
  if processed_source.parser_error
    offenses << offense_from_error(processed_source.parser_error)
  end
  processed_source.diagnostics.each do |diagnostic|
    offenses << offense_from_diagnostic(diagnostic,
                                        processed_source.ruby_version)
  end
  offenses
end