module Gris::PaginatedPresenter

Public Class Methods

included(base) click to toggle source
# File lib/gris/output_formatters/paginated_presenter.rb, line 3
def self.included(base)
  base.class_eval do
    include Gris::Presenter

    property :total_count
    property :total_pages
    property :current_page
    property :next_page
    property :prev_page

    link :self do |opts|
      "#{request_url(opts)}?#{query_string_for_page(represented.current_page, opts)}"
    end

    link :next do |opts|
      "#{request_url(opts)}?#{query_string_for_page(represented.next_page, opts)}" if represented.next_page
    end

    link :prev do |opts|
      "#{request_url(opts)}?#{query_string_for_page(represented.prev_page, opts)}" if represented.prev_page
    end

    private

    def request_url(opts)
      request = Grape::Request.new(opts[:env])
      "#{request.base_url}#{opts[:env]['PATH_INFO']}"
    end

    def query_string_for_page(page, opts)
      qs = Rack::Utils.parse_nested_query(opts[:env]['QUERY_STRING'])
      qs['page'] = page
      qs.to_query
    end
  end
end

Public Instance Methods

query_string_for_page(page, opts) click to toggle source
# File lib/gris/output_formatters/paginated_presenter.rb, line 32
def query_string_for_page(page, opts)
  qs = Rack::Utils.parse_nested_query(opts[:env]['QUERY_STRING'])
  qs['page'] = page
  qs.to_query
end
request_url(opts) click to toggle source
# File lib/gris/output_formatters/paginated_presenter.rb, line 27
def request_url(opts)
  request = Grape::Request.new(opts[:env])
  "#{request.base_url}#{opts[:env]['PATH_INFO']}"
end