gistfile1.txt

class DocumentFilter
  def self.find(klass, options = {})
    document_filter = self.new(klass, options)
    document_filter.results
  end

  def initialize(klass, options = {})
    @document_class = klass.to_s.capitalize.constantize
    @options = options.symbolize_keys!
    @documents = @document_class.where("1 = 1")
  end

  def results
    @documents = @documents.send(@options[:estimate_type]) if @options[:estimate_type]

    if @options[:aasm_current_state]
      @documents = @documents.where(:aasm_current_state => @options[:aasm_current_state])
    end
  end
end