activity_logger.rb

module ActivityLogger

  include ActiveSupport
      
  def self.included(base)
    base.extend ClassMethods
  end

  module ClassMethods
    def log_with(model_name, options = {}) 
      @@activity_logger_options = { 
        :save_method => :save_with_log,
        :update_method => :update_with_log,
        :validate_method => :valid?, 
        :exclude_attributes => []
      }.merge(options)
      
      @@activity_logger = model_name.to_s.camelize.constantize
      
    end

    def activity_logger
      @@activity_logger
    end

    def activity_logger_options
      @@activity_logger_options
    end
  end

  def save_with_log(doer, options = {})
    self.class.activity_logger.send(self.class.activity_logger_options[:save_method], self, doer, self.class.activity_logger_options.merge(options))
  end

  def update_with_log(attributes,doer,options = {})
    self.class.activity_logger.send(self.class.activity_logger_options[:update_method], self, attributes, doer, self.class.activity_logger_options.merge(options))
  end

end