module JsonApiClient
  class ResultSet < Array

    attr_accessor :total_pages,
                  :total_entries,
                  :offset,
                  :per_page,
                  :current_page,
                  :errors,
                  :record_class
    alias_attribute :limit_value, :per_page

    def self.build(klass, data)
      result_data = data.fetch(klass.table_name, [])
      new(result_data.map {|attributes| klass.new(attributes) }).tap do |result_set|
        result_set.record_class = klass
        yield(result_set) if block_given?
      end
    end

    def has_errors?
      errors && errors.length > 0
    end

    def out_of_bounds?
      current_page > total_pages
    end

    def previous_page
      current_page > 1 ? (current_page - 1) : nil
    end

    def next_page
      current_page < total_pages ? (current_page + 1) : nil
    end
  end
end