module RulesEngine
  module Rule
    class <%=rule_class%> < RulesEngine::Rule::Definition

      attr_reader :workflow

      ##################################################################
      # class options
      self.options = 
        {
          :group => 'Workflow',
          :display_name => 'Workflow Start',    
          :help_partial => '/re_rule_definitions/<%=rule_name%>/help',
          :new_partial => '/re_rule_definitions/<%=rule_name%>/new',
          :edit_partial => '/re_rule_definitions/<%=rule_name%>/edit'
        } 
  
      ##################################################################
      # set the rule data
      def data= data
        if data.nil?
          @title = nil
          @workflow = nil
        else
          @title, @workflow = ActiveSupport::JSON.decode(data)
        end  
      end
  
      ##################################################################
      # get the rule attributes
      def title
        @title
      end

      def summary
        "Start the workflow : #{workflow}"
      end
  
      def data
        [title, workflow].to_json
      end
  
      def expected_outcomes
        [:outcome => RulesEngine::Rule::Outcome::START_WORKFLOW, :workflow_code => workflow]
      end
  
      ##################################################################
      # set the rule attributes
      def attributes=(params)
        param_hash = params.symbolize_keys

        @title = param_hash[:<%=rule_name%>_title]
        @workflow = param_hash[:<%=rule_name%>_workflow]
      end
  
      ##################################################################
      # validation and errors
      def valid?
        @errors = {}
        @errors[:<%=rule_name%>_title] = "Title required" if title.blank?    
        @errors[:<%=rule_name%>_workflow] = "Workflow required" if workflow.blank?
        return @errors.empty?
      end

      ##################################################################
      # callbacks when the rule is added and removed from a workflow
      def before_create()
      end
  
      def before_update()
      end
      
      def before_destroy()
      end
  
      ##################################################################
      # execute the rule
      # start the workflow
      def process(process_id, data)
        return RulesEngine::Rule::Outcome.new(RulesEngine::Rule::Outcome::START_WORKFLOW, workflow)
      end  
    end
  end
end