Module: DebugLogging::ClassNotifier

Defined in:
lib/debug_logging/class_notifier.rb

Instance Method Summary collapse

Instance Method Details

#notifies(*methods_to_notify) ⇒ Object 



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# File 'lib/debug_logging/class_notifier.rb', line 5

def notifies(*methods_to_notify)
  # When opts are present it will always be a new configuration instance per method
  # When opts are not present it will reuse the class' configuration object
  payload = methods_to_notify.last.is_a?(Hash) && methods_to_notify.pop.dup || {}
  config_opts = {}
  unless payload.empty?
    DebugLogging::Configuration::CONFIG_KEYS.each { |k| config_opts[k] = payload.delete(k) if payload.key?(k) }
  end
  if methods_to_notify.first.is_a?(Array)
    methods_to_notify = methods_to_notify.shift
  else
    # logged :meth1, :meth2, :meth3 without options is valid too
  end
  methods_to_notify.each do |method_to_notify|
    # method name must be a symbol
    method_to_notify = method_to_notify.to_sym
    original_method = method(method_to_notify)
    (class << self; self; end).class_eval do
      define_method(method_to_notify) do |*args, &block|
        config_proxy = if (proxy = instance_variable_get(DebugLogging::Configuration.config_pointer('kn',
                                                                                                    method_to_notify)))
                         proxy
                       else
                         proxy = if config_opts.empty?
                                   debug_config
                                 else
                                   DebugLogging::Configuration.new(**debug_config.to_hash.merge(config_opts))
                                 end
                         proxy.register(method_to_notify)
                         instance_variable_set(DebugLogging::Configuration.config_pointer('kn', method_to_notify),
                                               proxy)
                         ActiveSupport::Notifications.subscribe(
                           DebugLogging::ArgumentPrinter.debug_event_name_to_s(method_to_notify: method_to_notify)
                         ) do |*debug_args|
                           proxy.log do
                             DebugLogging::LogSubscriber.log_event(ActiveSupport::Notifications::Event.new(*debug_args))
                           end
                         end
                         proxy
                       end
        ActiveSupport::Notifications.instrument(
          DebugLogging::ArgumentPrinter.debug_event_name_to_s(method_to_notify: method_to_notify),
          {
            debug_args: args,
            config_proxy: config_proxy,
            **payload
          }
        ) do
          if args.size == 1 && (harsh = args[0]) && harsh.is_a?(Hash)
            original_method.call(**harsh, &block)
          else
            original_method.call(*args, &block)
          end
        end
      end
    end
  end
end