Moove-it/rusen

require_relative 'base_notifier'

begin
  require 'log4r'
  require 'log4r/yamlconfigurator'
rescue LoadError
  puts <<-MESSAGE
  [Rusen Error] To use log4r notifier add this to your Gemfile:
    gem 'log4r'
  MESSAGE
  raise
end

module Rusen
  module Notifiers

    class Log4rNotifier < BaseNotifier

      def self.identification_symbol
        :log4r
      end

      def initialize(settings)
        super(settings)

        load_config(@settings.log4r_config_file)

        @logger = logger_instance(@settings.logger_name)
      end

      def notify(notification)
        @notification = notification
        @sessions     = get_sessions(@notification)

        # We need to ignore all the exceptions thrown by Log4rNotifier#notify.
        @logger.error { build_content }
      rescue Exception => exception
        handle_notification_exception(exception)
      end

      private

      def build_content
        template_path = File.expand_path('../../templates/log4r_template.txt.erb', __FILE__)

        template = File.open(template_path).read
        rhtml = ERB.new(template, nil, '-')
        rhtml.result(binding)
      end

      def logger_instance(name = nil)
        if name
          Log4r::Logger[name]
        else
          Log4r::Logger.root
        end
      end

      # Loads the given config file.
      #
      # @param [String] config_yml Configuration file path.
      def load_config(config_yml)
        if config_yml
          Log4r::YamlConfigurator.load_yaml_file(config_yml)
        end
      end
    end

  end
end