Module: InspectorGadget::Brain

Defined in:
lib/inspector_gadget.rb

Class Method Summary collapse

Class Method Details

.log_all_instance_method_calls(obj) ⇒ Object

obj either a class (instance methods) or a class singleton (class methods)



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# File 'lib/inspector_gadget.rb', line 14

def self.log_all_instance_method_calls(obj)
  # setting up alias_method_chain
  obj.class_eval do
    (instance_methods - Object.methods).each do |method_name|
      method_name = method_name.to_s # convert symbol to string
      aliased_target, punctuation = method_name.to_s.sub(/([?!=])$/, ''), $1
      method_with_logging_name, method_without_logging_name = "#{aliased_target}_with_logging#{punctuation}", "#{aliased_target}_without_logging#{punctuation}"

      define_method(method_with_logging_name) do |*args, &block|
        args_to_log = args.dup
        filter_args_in_log(method_name, args_to_log)
        if self.is_a?(Class)
          method_type = 'class'
          class_name = self.name
        else
          method_type = 'instance'
          class_name = self.class.name
        end
        Rails.logger.info("#{class_name} LOG: #{method_type} method name: #{method_name}, args: #{args_to_log.inspect}")
        result = send(method_without_logging_name, *args, &block)
        result_to_log = result.dup rescue result
        filter_result_in_log(method_name, result_to_log)
        Rails.logger.info("#{class_name} LOG: #{method_type} method name: #{method_name}, args: #{args_to_log.inspect} returned #{result_to_log.inspect}")
        result
      end

      alias_method_chain method_name, :logging

      # override this method to hide passwords etc
      def filter_args_in_log(method_name, args)
      end

      # override this method to hide passwords etc
      def filter_result_in_log(method_name, result)
      end
    end
  end
end